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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta name="robots" content="noindex,noarchive">
<title>Qt Toolkit - QWidget Class</title><style type="text/css"><!--
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<a href=index.html><img width=122 height=65 src=qtlogo.jpg alt="Qt logo" align=left border=0></a>
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<h1 align=center>QWidget Class Reference</h1><br clear="all">
<p>
The QWidget class is the base class of all user interface objects.
<a href="#details">More...</a>
<p>
<code>#include &lt;<a href="qwidget-h.html">qwidget.h</a>&gt;</code>
<p>
Inherits <a href="qobject.html">QObject</a> and <a href="qpaintdevice.html">QPaintDevice</a>.
<p>Inherited by <a href="qbutton.html">QButton</a>, <a href="qcombobox.html">QComboBox</a>, <a href="qdialog.html">QDialog</a>, <a href="qframe.html">QFrame</a>, <a href="qglwidget.html">QGLWidget</a>, <a href="qlineedit.html">QLineEdit</a>, <a href="qmainwindow.html">QMainWindow</a>, <a href="qnpwidget.html">QNPWidget</a>, <a href="qscrollbar.html">QScrollBar</a>, <a href="qsemimodal.html">QSemiModal</a>, <a href="qslider.html">QSlider</a>, <a href="qstatusbar.html">QStatusBar</a>, <a href="qtabbar.html">QTabBar</a>, <a href="qtoolbar.html">QToolBar</a>, <a href="qwindow.html">QWindow</a> and <a href="qxtwidget.html">QXtWidget</a>.
<p><a href="qwidget-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><span class="fn"><a href="qwidget.html#a0"><strong>QWidget</strong></a>(QWidget*parent=0, constchar*name=0, WFlagsf=0)</span>
<li><span class="fn"><a href="qwidget.html#a1"><strong>~QWidget</strong></a>()</span>
<li><span class="fn">WId<a href="qwidget.html#a2"><strong>winId</strong></a>()const</span>
<li><span class="fn">GUIStyle<a href="qwidget.html#a3"><strong>style</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#a4"><strong>setStyle</strong></a>(GUIStyle)</span>
<li><span class="fn">bool<a href="qwidget.html#a5"><strong>isTopLevel</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#a6"><strong>isModal</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#a7"><strong>isPopup</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#a8"><strong>isDesktop</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#a9"><strong>isEnabled</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#b0"><strong>isEnabledTo</strong></a>(QWidget*)const</span>
<li><span class="fn">bool<a href="qwidget.html#b1"><strong>isEnabledToTLW</strong></a>()const</span>
<li><span class="fn">constQRect&amp;<a href="qwidget.html#b3"><strong>frameGeometry</strong></a>()const</span>
<li><span class="fn">constQRect&amp;<a href="qwidget.html#b4"><strong>geometry</strong></a>()const</span>
<li><span class="fn">int<a href="qwidget.html#b5"><strong>x</strong></a>()const</span>
<li><span class="fn">int<a href="qwidget.html#b6"><strong>y</strong></a>()const</span>
<li><span class="fn">QPoint<a href="qwidget.html#b7"><strong>pos</strong></a>()const</span>
<li><span class="fn">QSize<a href="qwidget.html#b8"><strong>size</strong></a>()const</span>
<li><span class="fn">int<a href="qwidget.html#b9"><strong>width</strong></a>()const</span>
<li><span class="fn">int<a href="qwidget.html#c0"><strong>height</strong></a>()const</span>
<li><span class="fn">QRect<a href="qwidget.html#c1"><strong>rect</strong></a>()const</span>
<li><span class="fn">QRect<a href="qwidget.html#c2"><strong>childrenRect</strong></a>()const</span>
<li><span class="fn">QSize<a href="qwidget.html#c3"><strong>minimumSize</strong></a>()const</span>
<li><span class="fn">QSize<a href="qwidget.html#c4"><strong>maximumSize</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#c5"><strong>setMinimumSize</strong></a>(constQSize&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#c6"><strong>setMinimumSize</strong></a>(intminw, intminh)</span>
<li><span class="fn">void<a href="qwidget.html#c7"><strong>setMaximumSize</strong></a>(constQSize&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#c8"><strong>setMaximumSize</strong></a>(intmaxw, intmaxh)</span>
<li><span class="fn">void<a href="qwidget.html#c9"><strong>setMinimumWidth</strong></a>(intminw)</span>
<li><span class="fn">void<a href="qwidget.html#d0"><strong>setMinimumHeight</strong></a>(intminh)</span>
<li><span class="fn">void<a href="qwidget.html#d1"><strong>setMaximumWidth</strong></a>(intmaxw)</span>
<li><span class="fn">void<a href="qwidget.html#d2"><strong>setMaximumHeight</strong></a>(intmaxh)</span>
<li><span class="fn">void<a href="qwidget.html#d3"><strong>setMask</strong></a>(QBitmap)</span>
<li><span class="fn">void<a href="qwidget.html#d4"><strong>setMask</strong></a>(constQRegion&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#d5"><strong>clearMask</strong></a>()</span>
<li><span class="fn">QSize<a href="qwidget.html#d6"><strong>sizeIncrement</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#d7"><strong>setSizeIncrement</strong></a>(constQSize&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#d8"><strong>setSizeIncrement</strong></a>(intw, inth)</span>
<li><span class="fn">void<a href="qwidget.html#d9"><strong>setFixedSize</strong></a>(constQSize&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#e0"><strong>setFixedSize</strong></a>(intw, inth)</span>
<li><span class="fn">void<a href="qwidget.html#e1"><strong>setFixedWidth</strong></a>(intw)</span>
<li><span class="fn">void<a href="qwidget.html#e2"><strong>setFixedHeight</strong></a>(inth)</span>
<li><span class="fn">QPoint<a href="qwidget.html#e3"><strong>mapToGlobal</strong></a>(constQPoint&amp;)const</span>
<li><span class="fn">QPoint<a href="qwidget.html#e4"><strong>mapFromGlobal</strong></a>(constQPoint&amp;)const</span>
<li><span class="fn">QPoint<a href="qwidget.html#e5"><strong>mapToParent</strong></a>(constQPoint&amp;)const</span>
<li><span class="fn">QPoint<a href="qwidget.html#e6"><strong>mapFromParent</strong></a>(constQPoint&amp;)const</span>
<li><span class="fn">QWidget*<a href="qwidget.html#e7"><strong>topLevelWidget</strong></a>()const</span>
<li><span class="fn">enum<strong><a name="BackgroundMode"></a>BackgroundMode</strong>{FixedColor, FixedPixmap, NoBackground, PaletteForeground, PaletteBackground, PaletteLight, PaletteMidlight, PaletteDark, PaletteMid, PaletteText, PaletteBase}</span>
<li><span class="fn">BackgroundMode<a href="qwidget.html#e8"><strong>backgroundMode</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#e9"><strong>setBackgroundMode</strong></a>(BackgroundMode)</span>
<li><span class="fn">constQColor&amp;<a href="qwidget.html#f0"><strong>backgroundColor</strong></a>()const</span>
<li><span class="fn">constQColor&amp;<a href="qwidget.html#f1"><strong>foregroundColor</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#f2"><strong>setBackgroundColor</strong></a>(constQColor&amp;)</span>
<li><span class="fn">constQPixmap*<a href="qwidget.html#f3"><strong>backgroundPixmap</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#f4"><strong>setBackgroundPixmap</strong></a>(constQPixmap&amp;)</span>
<li><span class="fn">constQColorGroup&amp;<a href="qwidget.html#f5"><strong>colorGroup</strong></a>()const</span>
<li><span class="fn">constQPalette&amp;<a href="qwidget.html#f6"><strong>palette</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#f7"><strong>setPalette</strong></a>(constQPalette&amp;)</span>
<li><span class="fn">constQFont&amp;<a href="qwidget.html#f8"><strong>font</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#f9"><strong>setFont</strong></a>(constQFont&amp;)</span>
<li><span class="fn">QFontMetrics<a href="qwidget.html#g0"><strong>fontMetrics</strong></a>()const</span>
<li><span class="fn">QFontInfo<a href="qwidget.html#g1"><strong>fontInfo</strong></a>()const</span>
<li><span class="fn">PropagationMode<a href="qwidget.html#g2"><strong>fontPropagation</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#g3"><strong>setFontPropagation</strong></a>(PropagationMode)</span>
<li><span class="fn">PropagationMode<a href="qwidget.html#g4"><strong>palettePropagation</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#g5"><strong>setPalettePropagation</strong></a>(PropagationMode)</span>
<li><span class="fn">constQCursor&amp;<a href="qwidget.html#g6"><strong>cursor</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#g7"><strong>setCursor</strong></a>(constQCursor&amp;)</span>
<li><span class="fn">constchar*<a href="qwidget.html#g8"><strong>caption</strong></a>()const</span>
<li><span class="fn">constQPixmap*<a href="qwidget.html#g9"><strong>icon</strong></a>()const</span>
<li><span class="fn">constchar*<a href="qwidget.html#h0"><strong>iconText</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#h1"><strong>hasMouseTracking</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#h6"><strong>isActiveWindow</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#h7"><strong>setActiveWindow</strong></a>()</span>
<li><span class="fn">bool<a href="qwidget.html#h8"><strong>isFocusEnabled</strong></a>()const</span>
<li><span class="fn">FocusPolicy<a href="qwidget.html#h9"><strong>focusPolicy</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#i0"><strong>setFocusPolicy</strong></a>(FocusPolicy)</span>
<li><span class="fn">bool<a href="qwidget.html#i1"><strong>hasFocus</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#i2"><strong>setFocus</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#i3"><strong>clearFocus</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#i5"><strong>setFocusProxy</strong></a>(QWidget*)</span>
<li><span class="fn">QWidget*<a href="qwidget.html#i6"><strong>focusProxy</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#i7"><strong>grabMouse</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#i8"><strong>grabMouse</strong></a>(constQCursor&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#i9"><strong>releaseMouse</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#j0"><strong>grabKeyboard</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#j1"><strong>releaseKeyboard</strong></a>()</span>
<li><span class="fn">bool<a href="qwidget.html#j4"><strong>isUpdatesEnabled</strong></a>()const</span>
<li><span class="fn">virtualbool<a href="qwidget.html#k5"><strong>close</strong></a>(boolforceKill=FALSE)</span>
<li><span class="fn">bool<a href="qwidget.html#k6"><strong>isVisible</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#k7"><strong>isVisibleTo</strong></a>(QWidget*)const</span>
<li><span class="fn">bool<a href="qwidget.html#k8"><strong>isVisibleToTLW</strong></a>()const</span>
<li><span class="fn">virtualQSize<a href="qwidget.html#l7"><strong>sizeHint</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#l8"><strong>adjustSize</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#l9"><strong>recreate</strong></a>(QWidget*parent, WFlags, constQPoint&amp;, boolshowIt=FALSE)</span>
<li><span class="fn">void<a href="qwidget.html#m0"><strong>erase</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#m1"><strong>erase</strong></a>(intx, inty, intw, inth)</span>
<li><span class="fn">void<a href="qwidget.html#m2"><strong>erase</strong></a>(constQRect&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#m3"><strong>scroll</strong></a>(intdx, intdy)</span>
<li><span class="fn">void<a href="qwidget.html#m4"><strong>drawText</strong></a>(intx, inty, constchar*)</span>
<li><span class="fn">void<a href="qwidget.html#m5"><strong>drawText</strong></a>(constQPoint&amp;, constchar*)</span>
<li><span class="fn">QWidget*<a href="qwidget.html#m6"><strong>focusWidget</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#m7"><strong>setAcceptDrops</strong></a>(boolon)</span>
<li><span class="fn">bool<a href="qwidget.html#m8"><strong>acceptDrops</strong></a>()const</span>
<li><span class="fn">QWidget*<a href="qwidget.html#m9"><strong>parentWidget</strong></a>()const</span>
<li><span class="fn">bool<a href="qwidget.html#n0"><strong>testWFlags</strong></a>(WFlagsn)const</span>
</ul>
<h2>Public Slots</h2>
<ul>
<li><span class="fn">virtualvoid<a href="qwidget.html#b2"><strong>setEnabled</strong></a>(bool)</span>
<li><span class="fn">void<a href="qwidget.html#h2"><strong>setCaption</strong></a>(constchar*)</span>
<li><span class="fn">void<a href="qwidget.html#h3"><strong>setIcon</strong></a>(constQPixmap&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#h4"><strong>setIconText</strong></a>(constchar*)</span>
<li><span class="fn">void<a href="qwidget.html#h5"><strong>setMouseTracking</strong></a>(boolenable)</span>
<li><span class="fn">void<a href="qwidget.html#j5"><strong>setUpdatesEnabled</strong></a>(boolenable)</span>
<li><span class="fn">void<a href="qwidget.html#j6"><strong>update</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#j7"><strong>update</strong></a>(intx, inty, intw, inth)</span>
<li><span class="fn">void<a href="qwidget.html#j8"><strong>update</strong></a>(constQRect&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#j9"><strong>repaint</strong></a>(boolerase=TRUE)</span>
<li><span class="fn">void<a href="qwidget.html#k0"><strong>repaint</strong></a>(intx, inty, intw, inth, boolerase=TRUE)</span>
<li><span class="fn">void<a href="qwidget.html#k1"><strong>repaint</strong></a>(constQRect&amp;, boolerase=TRUE)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#k2"><strong>show</strong></a>()</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#k3"><strong>hide</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#k4"><strong>iconify</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#k9"><strong>raise</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#l0"><strong>lower</strong></a>()</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#l1"><strong>move</strong></a>(intx, inty)</span>
<li><span class="fn">void<a href="qwidget.html#l2"><strong>move</strong></a>(constQPoint&amp;)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#l3"><strong>resize</strong></a>(intw, inth)</span>
<li><span class="fn">void<a href="qwidget.html#l4"><strong>resize</strong></a>(constQSize&amp;)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#l5"><strong>setGeometry</strong></a>(intx, inty, intw, inth)</span>
<li><span class="fn">void<a href="qwidget.html#l6"><strong>setGeometry</strong></a>(constQRect&amp;)</span>
</ul>
<h2>Static Public Members</h2>
<ul>
<li><span class="fn">void<a href="qwidget.html#u1"><strong>setTabOrder</strong></a>(QWidget*, QWidget*)</span>
<li><span class="fn">QWidget*<a href="qwidget.html#u2"><strong>mouseGrabber</strong></a>()</span>
<li><span class="fn">QWidget*<a href="qwidget.html#u3"><strong>keyboardGrabber</strong></a>()</span>
<li><span class="fn">QWidget*<a href="qwidget.html#t9"><strong>find</strong></a>(WId)</span>
<li><span class="fn">QWidgetMapper*<a href="qwidget.html#u0"><strong>wmapper</strong></a>()</span>
</ul>
<h2>Protected Members</h2>
<ul>
<li><span class="fn">virtualbool<a href="qwidget.html#n3"><strong>event</strong></a>(QEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#n4"><strong>mousePressEvent</strong></a>(QMouseEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#n5"><strong>mouseReleaseEvent</strong></a>(QMouseEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#n6"><strong>mouseDoubleClickEvent</strong></a>(QMouseEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#n7"><strong>mouseMoveEvent</strong></a>(QMouseEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#n8"><strong>keyPressEvent</strong></a>(QKeyEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#n9"><strong>keyReleaseEvent</strong></a>(QKeyEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o0"><strong>focusInEvent</strong></a>(QFocusEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o1"><strong>focusOutEvent</strong></a>(QFocusEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o2"><strong>enterEvent</strong></a>(QEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o3"><strong>leaveEvent</strong></a>(QEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o4"><strong>paintEvent</strong></a>(QPaintEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o5"><strong>moveEvent</strong></a>(QMoveEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o6"><strong>resizeEvent</strong></a>(QResizeEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o7"><strong>closeEvent</strong></a>(QCloseEvent*)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o8"><strong>styleChange</strong></a>(GUIStyle)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#o9"><strong>enabledChange</strong></a>(bool)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#p0"><strong>backgroundColorChange</strong></a>(constQColor&amp;)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#p1"><strong>backgroundPixmapChange</strong></a>(constQPixmap&amp;)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#p2"><strong>paletteChange</strong></a>(constQPalette&amp;)</span>
<li><span class="fn">virtualvoid<a href="qwidget.html#p3"><strong>fontChange</strong></a>(constQFont&amp;)</span>
<li><span class="fn">virtualint<a href="qwidget.html#p4"><strong>metric</strong></a>(int)const</span>
<li><span class="fn">void<a href="qwidget.html#p5"><strong>create</strong></a>(WId)</span>
<li><span class="fn">void<a href="qwidget.html#p6"><strong>create</strong></a>(WId, boolinitializeWindow, booldestroyOldWindow)</span>
<li><span class="fn">void<a href="qwidget.html#p7"><strong>destroy</strong></a>(booldestroyWindow, booldestroySubWindows)</span>
<li><span class="fn">WFlags<a href="qwidget.html#p8"><strong>getWFlags</strong></a>()const</span>
<li><span class="fn">void<a href="qwidget.html#p9"><strong>setWFlags</strong></a>(WFlags)</span>
<li><span class="fn">void<a href="qwidget.html#q0"><strong>clearWFlags</strong></a>(WFlagsn)</span>
<li><span class="fn">void<a href="qwidget.html#q1"><strong>setFRect</strong></a>(constQRect&amp;)</span>
<li><span class="fn">void<a href="qwidget.html#q2"><strong>setCRect</strong></a>(constQRect&amp;)</span>
<li><span class="fn">virtualbool<a href="qwidget.html#q3"><strong>focusNextPrevChild</strong></a>(boolnext)</span>
<li><span class="fn">QWExtra*<a href="qwidget.html#q4"><strong>extraData</strong></a>()</span>
<li><span class="fn">QFocusData*<a href="qwidget.html#q5"><strong>focusData</strong></a>()</span>
<li><span class="fn">void<a href="qwidget.html#q6"><strong>setSizeGrip</strong></a>(bool)</span>
</ul>
<hr><h2><a name="details"></a>Detailed Description</h2>
The QWidget class is the base class of all user interface objects.
<p>
The widget is the atom of the user interface: It receives mouse,
keyboard and other events from the window system, and paints a
representation of itself on the screen.  Every widget is
rectangular, and they are sorted in a Z-order.  A widget is clipped
by its parent and by the widgets in front of it.
<p>A widget without a parent, called a top-level widget, is a
window with a frame and a title bar (though it is also possible to
create top level widgets without such decoration).  A widget with a
parent is a child window in its parent.  You usually cannot distinguish
a child widget from its parent visually.
<p>QWidget has many member functions, but some of them have little
direct functionality - for example it has a font but never uses it
itself. There are many subclasses which provide real functionality,
as diverse as <a href="qpushbutton.html">QPushButton</a>, <a href="qlistbox.html">QListBox</a> and <a href="qtabdialog.html">QTabDialog</a>.
<p><strong>Groups of functions:</strong>
<ul>
<p><li> Window functions:
<a href="qwidget.html#k2">show</a>(),
<a href="qwidget.html#k3">hide</a>(),
<a href="qwidget.html#k9">raise</a>(),
<a href="qwidget.html#l0">lower</a>(),
<a href="qwidget.html#k5">close</a>().
<p><li> Top level windows:
<a href="qwidget.html#g8">caption</a>(),
<a href="qwidget.html#h2">setCaption</a>(),
<a href="qwidget.html#g9">icon</a>(),
<a href="qwidget.html#h3">setIcon</a>(),
<a href="qwidget.html#h0">iconText</a>(),
<a href="qwidget.html#h4">setIconText</a>(),
<a href="qwidget.html#h6">isActiveWindow</a>(),
<a href="qwidget.html#h7">setActiveWindow</a>(),
<a href="qwidget.html#k4">iconify</a>().
<p><li> Window contents:
<a href="qwidget.html#j6">update</a>(),
<a href="qwidget.html#k0">repaint</a>(),
<a href="qwidget.html#m1">erase</a>(),
drawRect(),
<a href="qwidget.html#m3">scroll</a>().
<p><li> Geometry:
<a href="qwidget.html#l1">move</a>(),
<a href="qwidget.html#l3">resize</a>(),
<a href="qwidget.html#l5">setGeometry</a>(),
<a href="qwidget.html#b7">pos</a>(),
<a href="qwidget.html#b8">size</a>(),
<a href="qwidget.html#c1">rect</a>(),
<a href="qwidget.html#b5">x</a>(),
<a href="qwidget.html#b6">y</a>(),
<a href="qwidget.html#b9">width</a>(),
<a href="qwidget.html#c0">height</a>(),
<a href="qwidget.html#b3">frameGeometry</a>(),
<a href="qwidget.html#b4">geometry</a>(),
<a href="qwidget.html#c2">childrenRect</a>(),
<a href="qwidget.html#l7">sizeHint</a>(),
<a href="qwidget.html#l8">adjustSize</a>(),
<a href="qwidget.html#e4">mapFromGlobal</a>(),
<a href="qwidget.html#e6">mapFromParent</a>()
<a href="qwidget.html#e3">mapToGlobal</a>(),
<a href="qwidget.html#e5">mapToParent</a>(),
<a href="qwidget.html#c4">maximumSize</a>(),
<a href="qwidget.html#c3">minimumSize</a>(),
<a href="qwidget.html#d6">sizeIncrement</a>(),
<a href="qwidget.html#c8">setMaximumSize</a>(),
<a href="qwidget.html#c6">setMinimumSize</a>(),
<a href="qwidget.html#d8">setSizeIncrement</a>(),
<a href="qwidget.html#d9">setFixedSize</a>()
<p><li> Mode:
<a href="qwidget.html#k6">isVisible</a>(),
<a href="qwidget.html#k7">isVisibleTo</a>(),
<a href="qwidget.html#k8">isVisibleToTLW</a>(),
<a href="qwidget.html#a8">isDesktop</a>(),
<a href="qwidget.html#a9">isEnabled</a>(),
<a href="qwidget.html#b0">isEnabledTo</a>(),
<a href="qwidget.html#b1">isEnabledToTLW</a>(),
<a href="qwidget.html#a6">isModal</a>(),
<a href="qwidget.html#a7">isPopup</a>(),
<a href="qwidget.html#a5">isTopLevel</a>(),
<a href="qwidget.html#b2">setEnabled</a>(),
<a href="qwidget.html#h1">hasMouseTracking</a>(),
<a href="qwidget.html#h5">setMouseTracking</a>(),
<a href="qwidget.html#j4">isUpdatesEnabled</a>(),
<a href="qwidget.html#j5">setUpdatesEnabled</a>(),
<a href="qwidget.html#g3">setFontPropagation</a>(),
<a href="qwidget.html#g2">fontPropagation</a>(),
<a href="qwidget.html#g5">setPalettePropagation</a>(),
<a href="qwidget.html#g4">palettePropagation</a>().
<p><li> Look and feel:
<a href="qwidget.html#a3">style</a>(),
<a href="qwidget.html#a4">setStyle</a>(),
<a href="qwidget.html#g6">cursor</a>(),
<a href="qwidget.html#g7">setCursor</a>()
<a href="qwidget.html#f8">font</a>(),
<a href="qwidget.html#f9">setFont</a>(),
<a href="qwidget.html#f6">palette</a>(),
<a href="qwidget.html#f7">setPalette</a>(),
<a href="qwidget.html#e8">backgroundMode</a>(),
<a href="qwidget.html#e9">setBackgroundMode</a>(),
<a href="qwidget.html#f3">backgroundPixmap</a>(),
<a href="qwidget.html#f4">setBackgroundPixmap</a>(),
backgroundBrush(),
<a href="qwidget.html#f5">colorGroup</a>(),
<a href="qwidget.html#g0">fontMetrics</a>(),
<a href="qwidget.html#g1">fontInfo</a>().
<p><li> Keyboard focus functions:
<a href="qwidget.html#h8">isFocusEnabled</a>(),
<a href="qwidget.html#i0">setFocusPolicy</a>(),
<a href="qwidget.html#h9">focusPolicy</a>(),
<a href="qwidget.html#i1">hasFocus</a>(),
<a href="qwidget.html#i2">setFocus</a>(),
<a href="qwidget.html#i3">clearFocus</a>(),
<a href="qwidget.html#u1">setTabOrder</a>(),
<a href="qwidget.html#i5">setFocusProxy</a>().
<p><li> Mouse and keyboard grabbing:
<a href="qwidget.html#i7">grabMouse</a>(),
<a href="qwidget.html#i9">releaseMouse</a>(),
<a href="qwidget.html#j0">grabKeyboard</a>(),
<a href="qwidget.html#j1">releaseKeyboard</a>(),
<a href="qwidget.html#u2">mouseGrabber</a>(),
<a href="qwidget.html#u3">keyboardGrabber</a>().
<p><li> Event handlers:
<a href="qwidget.html#n3">event</a>(),
<a href="qwidget.html#n4">mousePressEvent</a>(),
<a href="qwidget.html#n5">mouseReleaseEvent</a>(),
<a href="qwidget.html#n6">mouseDoubleClickEvent</a>(),
<a href="qwidget.html#n7">mouseMoveEvent</a>(),
<a href="qwidget.html#n8">keyPressEvent</a>(),
<a href="qwidget.html#n9">keyReleaseEvent</a>(),
<a href="qwidget.html#o0">focusInEvent</a>(),
<a href="qwidget.html#o1">focusOutEvent</a>(),
<a href="qwidget.html#o2">enterEvent</a>(),
<a href="qwidget.html#o3">leaveEvent</a>(),
<a href="qwidget.html#o4">paintEvent</a>(),
<a href="qwidget.html#o5">moveEvent</a>(),
<a href="qwidget.html#o6">resizeEvent</a>(),
<a href="qwidget.html#o7">closeEvent</a>().
<p><li> Change handlers:
<a href="qwidget.html#p0">backgroundColorChange</a>(),
<a href="qwidget.html#p1">backgroundPixmapChange</a>(),
<a href="qwidget.html#o9">enabledChange</a>(),
<a href="qwidget.html#p3">fontChange</a>(),
<a href="qwidget.html#p2">paletteChange</a>(),
<a href="qwidget.html#o8">styleChange</a>().
<p><li> System functions:
<a href="qwidget.html#m9">parentWidget</a>(),
<a href="qwidget.html#e7">topLevelWidget</a>(),
<a href="qwidget.html#l9">recreate</a>(),
<a href="qwidget.html#a2">winId</a>(),
<a href="qwidget.html#t9">find</a>(),
<a href="qwidget.html#p4">metric</a>().
<p><li> Internal kernel functions:
<a href="qwidget.html#q1">setFRect</a>(),
<a href="qwidget.html#q2">setCRect</a>(),
<a href="qwidget.html#q3">focusNextPrevChild</a>(),
<a href="qwidget.html#u0">wmapper</a>(),
<a href="qwidget.html#q0">clearWFlags</a>(),
<a href="qwidget.html#p8">getWFlags</a>(),
<a href="qwidget.html#p9">setWFlags</a>(),
<a href="qwidget.html#n0">testWFlags</a>().
</ul>
<p>Every widget's constructor accepts two or three standard arguments:
<ul>
<li><code>QWidget *parent = 0</code> is the parent of the new widget.
If it is 0 (the default), the new widget will be a top-level window.
If not, it will be a child of <em>parent,</em> and be constrained by <em>parent's</em> geometry.
<li><code>const char *name = 0</code> is the widget name of the new
widget.  The widget name is little used at the moment - the
<a href="qobject.html#d0">dumpObjectTree</a>() debugging function uses it, and you can access it using
<a href="qobject.html#b0">name</a>().  It will become more important when our visual GUI builder is
ready (you can name a a widget in the builder, and <a href="qobject.html#f2">connect</a>() to it by
name in your code).
<li><code>WFlags f = 0</code> (where available) sets the <a
href="#widgetflags">widget flags;</a> the default is good for almost
all widgets, but to get e.g. top-level widgets without a window
system frame you must use special flags.
</ul>
<p>The <a href="tictac-tictac-cpp.html#QWidget">tictac/tictac.cpp</a> example program is good example of a simple
widget.  It contains a few event handlers (as all widgets must), a
few custom routines that are peculiar to it (as all useful widgets
must), and has a few children and connections.  Everything it does
is done in response to an event: This is by far the most common way
to design GUI applications.
<p>You will need to supply the content for your widgets yourself, but
here is a brief run-down of the events, starting with the most common
ones: <ul>
<p><li> paintEvent() - called whenever the widget needs to be
repainted.  Every widget which displays output must implement it,
and it is sensible to <em>never</em> paint on the screen outside
paintEvent().  You are guaranteed to receive a paint event
immediately after every resize events, and at once when the widget
is first shown.
<p><li> resizeEvent() - called when the widget has been resized.
<p><li> mousePressEvent() - called when a mouse button is pressed.
There are six mouse-related events, mouse press and mouse release
events are by far the most important.  A widget receives mouse press
events when the widget is inside it, or when it has grabbed the
mouse using grabMouse().
<p><li> mouseReleaseEvent() - called when a mouse button is released.
A widget receives mouse release events when it has received the
corresponding mouse press event.  This means that if the user
presses the mouse inside <em>your</em> widget, then drags the mouse to
somewhere else, then releases, <em>your</em> widget receives the release
event.  There is one exception, however: If a popup menu appears
while the mouse button is held down, that popup steals the mouse
events at once.
<p><li> mouseDoubleClickEvent() - not quite as obvious as it might seem.
If the user double-clicks, the widget receives a mouse press event
(perhaps a mouse move event or two if he/she does not hold the mouse
quite steady), a mouse release event and finally this event.  It is <em>not possible</em> to distinguish a click from a double click until you've
seen whether the second click arrives.  (This is one reason why most GUI
books recommend that double clicks be an extension of single clicks,
rather than a different action.)
</ul>
<p>If your widget only contains child widgets, you probably do not need to
implement any event handlers (except resizeEvent() for custom layout
management).
<p>Widgets that accept keyboard input need to reimplement a few more
event handlers: <ul>
<p><li> keyPressEvent() - called whenever a key is pressed, and again
when a key has been held down long enough for it to auto-repeat.
Note that the Tab and shift-Tab keys are only passed to the widget
if they are not used by the focus-change mechanisms.  To force those
keys to be processed by your widget, you must override <a href="qwidget.html#n3">QWidget::event</a>().
<p><li> focusInEvent() - called when the widget gains keyboard focus
(assuming you have called setFocusPolicy(), of course). Well
written widgets indicate that they own the keyboard focus in a clear
but discreet way.
<p><li> focusOutEvent() - called when the widget loses keyboard
focus.
</ul>
<p>Some widgets will need to reimplement some more obscure event
handlers, too: <ul>
<p><li> mouseMoveEvent() - called whenever the mouse moves while a
button is held down.  This is useful for e.g. dragging.  If you call
setMouseTracking(TRUE), you get mouse move events even when no
buttons are held down.  (Note that applications which make use of
mouse tracking are often not very useful on low-bandwidth X
connections.)
<p><li> keyReleaseEvent() - called whenever a key is released, and also
while it is held down if the key is auto-repeating.  In that case
the widget receives a key release event and immediately a key press
event for every repeat.
Note that the Tab and shift-Tab keys are only passed to the widget
if they are not used by the focus-change mechanisms.  To force those
keys to be processed by your widget, you must override QWidget::event().
<p><li> enterEvent() - called when the mouse enters the widget's screen
space.  (This excludes screen space owned by any children of the
widget.)
<p><li> leaveEvent() - called when the mouse leaves the widget's screen
space.
<p><li> moveEvent() - called when the widget has been moved relative to its
parent.
<p><li> closeEvent() - called when the user closes the widget (or when
close() is called).
</ul>
<p>There are also some <em>really</em> obscure events.  They are listed in
<a href="qevent-h.html">qevent.h</a> and you need to reimplement event() to handle them.  The
default implementation of event() handles Tab and shift-Tab (to move
the keyboard focus), and passes on every other event to one of the
more specialized handlers above.
<p>When writing a widget, there are a few more things to look out for.
In the constructor, be sure to set up your member variables early
on, before there's any chance that you might receive an event.
<p>It is often a good idea to reimplement sizeHint(), so users of your
class can set up layout management more easily.  If you do, consider
offering size management using autoMinimumSize() too.
<p>If your widget is a top-level window, setCaption() and setIcon() set
the title bar and icon respectively.
<p>See also:  <a href="qevent.html">QEvent</a>, <a href="qpainter.html">QPainter</a>, <a href="qgridlayout.html">QGridLayout</a> and <a href="qboxlayout.html">QBoxLayout</a>.
<p>Examples:
 <a href="tictac-tictac-cpp.html#QWidget">tictac/tictac.cpp</a>
 <a href="life-life-cpp.html#QWidget">life/life.cpp</a>
 <a href="dclock-dclock-cpp.html#QWidget">dclock/dclock.cpp</a>
 <a href="forever-forever-cpp.html#QWidget">forever/forever.cpp</a>
 <a href="desktop-desktop-cpp.html#QWidget">desktop/desktop.cpp</a>
 <a href="connect-connect-cpp.html#QWidget">connect/connect.cpp</a>
 <a href="tooltip-tooltip-cpp.html#QWidget">tooltip/tooltip.cpp</a>
 <a href="hello-hello-cpp.html#QWidget">hello/hello.cpp</a>
 <a href="xform-xform-cpp.html#QWidget">xform/xform.cpp</a>
 <a href="aclock-aclock-cpp.html#QWidget">aclock/aclock.cpp</a>
 <a href="menu-menu-cpp.html#QWidget">menu/menu.cpp</a>
 <a href="pref-pref-cpp.html#QWidget">pref/pref.cpp</a>
 <a href="progress-progress-cpp.html#QWidget">progress/progress.cpp</a>
 <a href="layout-layout-cpp.html#QWidget">layout/layout.cpp</a>
 <a href="qmag-qmag-cpp.html#QWidget">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#QWidget">showimg/showimg.cpp</a>
 <a href="biff-biff-cpp.html#QWidget">biff/biff.cpp</a>
 <a href="widgets-widgets-cpp.html#QWidget">widgets/widgets.cpp</a>

<hr><h2>Member Function Documentation</h2>
<h3 class="fn"><a name="a0"></a>QWidget::QWidget(QWidget*parent=0, constchar*name=0, WFlagsf=0)</h3>
<p>Constructs a widget which is a child of <em>parent,</em> with the name <em>name</em> and
widget flags set to <em>f.</em>
<p>If <em>parent</em> is 0, the new widget becomes a <a href="qwidget.html#a5">top-level
window</a>. If <em>parent</em> is another widget, this widget becomes a child
window inside <em>parent.</em>
<p>The <em>name</em> is sent to the <a href="qobject.html">QObject</a> constructor.
<p><a name="widgetflags"></a>
<p>The widget flags argument <em>f</em> is normally 0, but it can be set to
customize the window frame of a top-level widget (i.e. <em>parent</em> must be
zero). To customize the frame, set the <code>WStyle_Customize</code> flag OR'ed with
any of these flags:
<p><ul>
<li> <code>WStyle_NormalBorder</code> gives the window a normal border. Cannot
be combined with <code>WStyle_DialogBorder</code> or <code>WStyle_NoBorder.</code>
<li> <code>WStyle_DialogBorder</code> gives the window a thin dialog border.
Cannot be combined with <code>WStyle_NormalBorder</code> or <code>WStyle_NoBorder.</code>
<li> <code>WStyle_NoBorder</code> gives a borderless window. Note that the
user cannot move or resize a borderless window via the window system.
Cannot be combined with <code>WStyle_NormalBorder</code> or <code>WStyle_DialogBorder.</code>
<li> <code>WStyle_Title</code> gives the window a title bar.
<li> <code>WStyle_SysMenu</code> adds a window system menu.
<li> <code>WStyle_Minimize</code> adds a minimize button.
<li> <code>WStyle_Maximize</code> adds a maximize button.
<li> <code>WStyle_MinMax</code> is equal to <code>(WStyle_Minimize | WStyle_Maximize)
</code>.
<li> <code>WStyle_Tool</code> makes the window a tool window, usually
combined with <code>WStyle_NoBorder.</code> A tool window is a small window that
lives for a short time and it is typically used for creating popup
windows.
</ul>
<p>Note that X11 does not necessarily support all style flag combinations. X11
window managers live their own lives and can only take hints. Win32
supports all style flags.
<p>Example:
<pre>    <a href="qlabel.html">QLabel</a> *toolTip = new <a href="qlabel.html">QLabel</a>( 0, "myToolTip",
                                  WStyle_Customize | WStyle_NoBorder |
                                  WStyle_Tool );
</pre>
<p>The widget flags are defined in <a href="qwindowdefs-h.html">qwindowdefs.h</a> (which is included by
<a href="qwidget-h.html">qwidget.h</a>).
<h3 class="fn"><a name="a1"></a>QWidget::~QWidget()</h3>
<p>Destroys the widget.
<p>All children of this widget are deleted first.
The application exits if this widget is (was) the main widget.
<h3 class="fn">bool<a name="m8"></a>QWidget::acceptDrops()const</h3>
<p>Returns TRUE if drop events are enabled for this widget.
<p>See also:  <a href="qwidget.html#m7">setAcceptDrops</a>().
<h3 class="fn">void<a name="l8"></a>QWidget::adjustSize() <code>[virtual]</code></h3>
<p>Adjusts the size of the widget to fit the contents.
<p>Uses <a href="qwidget.html#l7">sizeHint</a>() if valid (i.e if the size hint's width and height are
equal to or greater than 0), otherwise sets the size to the children
rectangle (the union of all child widget geometries).
<p>See also:  <a href="qwidget.html#l7">sizeHint</a>() and <a href="qwidget.html#c2">childrenRect</a>().
<p>Examples:
 <a href="movies-main-cpp.html#adjustSize">movies/main.cpp</a>
<p>Reimplemented in <a href="qmessagebox.html#b9">QMessageBox</a>.
<h3 class="fn">const<a href="qcolor.html">QColor</a>&amp;<a name="f0"></a>QWidget::backgroundColor()const</h3>
<p>Returns the background color of this widget.
<p>The background color is independent of the color group.
<p>Setting a new palette overwrites the background color.
<p>See also:  <a href="qwidget.html#f2">setBackgroundColor</a>(), <a href="qwidget.html#f1">foregroundColor</a>(), <a href="qwidget.html#f5">colorGroup</a>() and <a href="qwidget.html#f6">palette</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#backgroundColor">grapher/grapher.cpp</a>
 <a href="xform-xform-cpp.html#backgroundColor">xform/xform.cpp</a>
 <a href="widgets-widgets-cpp.html#backgroundColor">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="p0"></a>QWidget::backgroundColorChange(const<a href="qcolor.html">QColor</a>&amp;oldBackgroundColor) <code>[virtualprotected]</code></h3>
<p>This virtual function is called from <a href="qwidget.html#f2">setBackgroundColor</a>().
<em>oldBackgroundColor</em> is the previous background color; you can get the new
background color from <a href="qwidget.html#f0">backgroundColor</a>().
<p>Reimplement this function if your widget needs to know when its
background color changes.  You will almost certainly need to update the
widget using either <a href="qwidget.html#k0">repaint</a>(TRUE) or <a href="qwidget.html#j6">update</a>().
<p>The default implementation calls update().
<p>See also:  <a href="qwidget.html#f2">setBackgroundColor</a>(), <a href="qwidget.html#f0">backgroundColor</a>(), <a href="qwidget.html#f7">setPalette</a>(), <a href="qwidget.html#k0">repaint</a>() and <a href="qwidget.html#j6">update</a>().
<h3 class="fn">QWidget::BackgroundMode<a name="e8"></a>QWidget::backgroundMode()const</h3>
<p>Returns the mode most recently set by <a href="qwidget.html#e9">setBackgroundMode</a>().
The default is <a href="qwidget.html#e9">PaletteBackground</a>
<h3 class="fn">const<a href="qpixmap.html">QPixmap</a>*<a name="f3"></a>QWidget::backgroundPixmap()const</h3>
<p>Returns the background pixmap, or null if no background pixmap has not
been set.  If the widget has been made empty, this function will return
a pixmap which isNull() rather than a null pointer.
<p>See also:  <a href="qwidget.html#f4">setBackgroundPixmap</a>() and <a href="qwidget.html#e9">setBackgroundMode</a>().
<h3 class="fn">void<a name="p1"></a>QWidget::backgroundPixmapChange(const<a href="qpixmap.html">QPixmap</a>&amp;oldBackgroundPixmap) <code>[virtualprotected]</code></h3>
<p>This virtual function is called from <a href="qwidget.html#f4">setBackgroundPixmap</a>().
<em>oldBackgroundPixmap</em> is the previous background pixmap; you can get the
new background pixmap from <a href="qwidget.html#f3">backgroundPixmap</a>().
<p>Reimplement this function if your widget needs to know when its
background pixmap changes.  You will almost certainly need to update the
widget using either <a href="qwidget.html#k0">repaint</a>(TRUE) or <a href="qwidget.html#j6">update</a>().
<p>The default implementation calls update().
<p>See also:  <a href="qwidget.html#f4">setBackgroundPixmap</a>(), <a href="qwidget.html#f3">backgroundPixmap</a>(), <a href="qwidget.html#k0">repaint</a>() and <a href="qwidget.html#j6">update</a>().
<h3 class="fn">constchar*<a name="g8"></a>QWidget::caption()const</h3>
<p>Returns the widget caption, or null if no caption has been set.
<p>See also:  <a href="qwidget.html#h2">setCaption</a>(), <a href="qwidget.html#g9">icon</a>() and <a href="qwidget.html#h0">iconText</a>().
<h3 class="fn"><a href="qrect.html">QRect</a><a name="c2"></a>QWidget::childrenRect()const</h3>
<p>Returns the bounding rectangle of the widget's children.
<p>Examples:
 <a href="widgets-widgets-cpp.html#childrenRect">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="i3"></a>QWidget::clearFocus()</h3>
<p>Takes keyboard input focus from the widget.
<p>If the widget has active focus, a <a href="qwidget.html#o1">focus out
event</a> is sent to this widget to tell it that it is about to
loose the focus.
<p>This widget must enable focus setting in order to get the keyboard input
focus, i.e. it must call <a href="qwidget.html#i0">setFocusPolicy</a>().
<p>See also:  <a href="qwidget.html#i1">hasFocus</a>(), <a href="qwidget.html#i2">setFocus</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>() and <a href="qapplication.html#c6">QApplication::focusWidget</a>().
<h3 class="fn">void<a name="d5"></a>QWidget::clearMask()</h3>
<p>Removes any mask set by <a href="qwidget.html#d3">setMask</a>().
<p>See also:  <a href="qwidget.html#d3">setMask</a>().
<h3 class="fn">void<a name="q0"></a>QWidget::clearWFlags(WFlagsf) <code>[protected]</code></h3>
<p>For internal use only.
<h3 class="fn">bool<a name="k5"></a>QWidget::close(boolforceKill=FALSE) <code>[virtual]</code></h3>
<p>Closes this widget. Returns TRUE if the widget was closed, otherwise
FALSE.
<p>First it sends the widget a <a href="qcloseevent.html">QCloseEvent</a>. The widget is <a href="qwidget.html#k3">hidden</a> if it <a href="qcloseevent.html#a2">accepts</a> the
close event. The default implementation of <a href="qwidget.html#o7">QWidget::closeEvent</a>()
accepts the close event.
<p>If <em>forceKill</em> is TRUE, the widget is deleted whether it accepts
the close event or not.
<p>The application is <a href="qapplication.html#f0">terminated</a> when
the <a href="qapplication.html#b9">main widget</a> is closed.
<p>The <a href="qapplication.html#e9">QApplication::lastWindowClosed</a>() signal is emitted when the last
visible top level widget is closed.
<p>See also:  <a href="qwidget.html#o7">closeEvent</a>(), <a href="qcloseevent.html">QCloseEvent</a>, <a href="qwidget.html#k3">hide</a>(), <a href="qapplication.html#f0">QApplication::quit</a>() and <a href="qapplication.html#b9">QApplication::setMainWidget</a>().
<p>Examples:
 <a href="application-application-cpp.html#close">application/application.cpp</a>
<h3 class="fn">void<a name="o7"></a>QWidget::closeEvent(<a href="qcloseevent.html">QCloseEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
widget close events.
<p>The default implementation calls e->accept(), which hides this widget.
See the <a href="qcloseevent.html">QCloseEvent</a> documentation for more details.
<p>See also:  <a href="qwidget.html#n3">event</a>(), <a href="qwidget.html#k3">hide</a>(), <a href="qwidget.html#k5">close</a>() and <a href="qcloseevent.html">QCloseEvent</a>.
<p>Reimplemented in <a href="qdialog.html#b6">QDialog</a>.
<h3 class="fn">const<a href="qcolorgroup.html">QColorGroup</a>&amp;<a name="f5"></a>QWidget::colorGroup()const</h3>
<p>Returns the current color group of the widget palette.
<p>The color group is determined by the state of the widget.
<p>A disabled widget returns the <a href="qpalette.html#a8">QPalette::disabled</a>() color group, a
widget in focus returns the <a href="qpalette.html#a9">QPalette::active</a>() color group and a
normal widget returns the <a href="qpalette.html#a7">QPalette::normal</a>() color group.
<p>See also:  <a href="qwidget.html#f6">palette</a>() and <a href="qwidget.html#f7">setPalette</a>().
<p>Examples:
 <a href="life-life-cpp.html#colorGroup">life/life.cpp</a>
<h3 class="fn">void<a name="p5"></a>QWidget::create(WIdwindow) <code>[protected]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="p6"></a>QWidget::create(WIdwindow, boolinitializeWindow, booldestroyOldWindow) <code>[protected]</code></h3>
<p>Creates a new widget window if <em>window</em> is null, otherwise sets the
widget's window to <em>window.</em>
<p>Initializes the window (sets the geometry etc.) if <em>initializeWindow</em>
is TRUE.  If <em>initializeWindow</em> is FALSE, no initialization is
performed.  This parameter makes only sense if <em>window</em> is a valid
window.
<p>Destroys the old window if <em>destroyOldWindow</em> is TRUE.  If <em>destroyOldWindow</em> is FALSE, you are responsible for destroying
the window yourself (using platform native code).
<p>The QWidget constructor calls <a href="qwidget.html#p5">create</a>(0,TRUE,TRUE) to create a window for
this widget.
<h3 class="fn">const<a href="qcursor.html">QCursor</a>&amp;<a name="g6"></a>QWidget::cursor()const</h3>
<p>Returns the widget cursor.
<p>See also:  <a href="qwidget.html#g7">setCursor</a>().
<h3 class="fn">void<a name="p7"></a>QWidget::destroy(booldestroyWindow, booldestroySubWindows) <code>[protected]</code></h3>
<p>Frees up window system resources.
Destroys the widget window if <em>destroyWindow</em> is TRUE.
<p>destroy() calls itself recursively for all the child widgets,
passing <em>destroySubWindows</em> for the <em>destroyWindow</em> parameter.
To have more control over destruction of subwidgets,
destroy subwidgets selectively first.
<p>This function is usually called from the QWidget destructor.
<h3 class="fn">void<a name="m4"></a>QWidget::drawText(intx, inty, constchar*str)</h3>
<p>Writes <em>str</em> at position <em>x,y.</em>
<p>The <em>y</em> position is the base line position of the text.  The text is
drawn using the default font and the default foreground color.
<p>This function is provided for convenience.  You will generally get
more flexible results and often higher speed by using a a <a href="qpainter.html">painter</a> instead.
<p>See also:  <a href="qwidget.html#f9">setFont</a>(), <a href="qwidget.html#f1">foregroundColor</a>() and <a href="qpainter.html#l4">QPainter::drawText</a>().
<h3 class="fn">void<a name="m5"></a>QWidget::drawText(const<a href="qpoint.html">QPoint</a>&amp;pos, constchar*str)</h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<h3 class="fn">void<a name="o9"></a>QWidget::enabledChange(boololdEnabled) <code>[virtualprotected]</code></h3>
<p>This virtual function is called from <a href="qwidget.html#b2">setEnabled</a>(). <em>oldEnabled</em> is the
previous setting; you can get the new setting from enabled().
<p>Reimplement this function if your widget needs to know when it becomes
enabled or disabled. You will almost certainly need to update the widget
using either <a href="qwidget.html#k0">repaint</a>(TRUE) or <a href="qwidget.html#j6">update</a>().
<p>The default implementation calls repaint(TRUE).
<p>See also:  <a href="qwidget.html#b2">setEnabled</a>(), <a href="qwidget.html#a9">isEnabled</a>(), <a href="qwidget.html#k0">repaint</a>() and <a href="qwidget.html#j6">update</a>().
<p>Reimplemented in <a href="qspinbox.html#d3">QSpinBox</a> and <a href="qbutton.html#d4">QButton</a>.
<h3 class="fn">void<a name="o2"></a>QWidget::enterEvent(<a href="qevent.html">QEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
widget enter events.
<p>An event is sent to the widget when the mouse cursor enters the widget.
<p>The default implementation does nothing.
<p>See also:  <a href="qwidget.html#o3">leaveEvent</a>(), <a href="qwidget.html#n7">mouseMoveEvent</a>() and <a href="qwidget.html#n3">event</a>().
<p>Reimplemented in <a href="qtoolbutton.html#b8">QToolButton</a>.
<h3 class="fn">void<a name="m1"></a>QWidget::erase(intx, inty, intw, inth)</h3>
<p>Erases the specified area <em>(x,y,w,h)</em> in the widget without generating
a <a href="qwidget.html#o4">paint event</a>.
<p>If <em>w</em> is negative, it is replaced with <code><a href="qwidget.html#b9">width</a>() - x</code>.
If <em>h</em> is negative, it is replaced width <code><a href="qwidget.html#c0">height</a>() - y</code>.
<p>Child widgets are not affected.
<p>See also:  <a href="qwidget.html#k0">repaint</a>().
<p>Examples:
 <a href="connect-connect-cpp.html#erase">connect/connect.cpp</a>
<h3 class="fn">void<a name="m0"></a>QWidget::erase()</h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<p>This version erases the entire widget.
<h3 class="fn">void<a name="m2"></a>QWidget::erase(const<a href="qrect.html">QRect</a>&amp;r)</h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<h3 class="fn">bool<a name="n3"></a>QWidget::event(<a href="qevent.html">QEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>This is the main event handler. You may reimplement this function
in a subclass, but we recommend using one of the specialized event
handlers instead.
<p>The main event handler first passes an event through all <a href="qobject.html#c3">event filters</a> that have been
installed.  If none of the filters intercept the event, it calls one
of the specialized event handlers.
<p>Key press/release events are treated differently from other events.
event() checks for Tab and shift-Tab and tries to move the focus
appropriately.  If there is no widget to move the focus to (or the
key press is not Tab or shift-Tab), event() calls <a href="qwidget.html#n8">keyPressEvent</a>().
<p>This function returns TRUE if it is able to pass the event over to
someone, or FALSE if nobody wanted the event.
<p>See also:  <a href="qwidget.html#o7">closeEvent</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#o2">enterEvent</a>(), <a href="qwidget.html#n8">keyPressEvent</a>(), <a href="qwidget.html#n9">keyReleaseEvent</a>(), <a href="qwidget.html#o3">leaveEvent</a>(), <a href="qwidget.html#n6">mouseDoubleClickEvent</a>(), <a href="qwidget.html#n7">mouseMoveEvent</a>(), <a href="qwidget.html#n4">mousePressEvent</a>(), <a href="qwidget.html#n5">mouseReleaseEvent</a>(), <a href="qwidget.html#o5">moveEvent</a>(), <a href="qwidget.html#o4">paintEvent</a>(), <a href="qwidget.html#o6">resizeEvent</a>(), <a href="qobject.html#a2">QObject::event</a>() and <a href="qobject.html#e3">QObject::timerEvent</a>().
<p>Reimplemented from <a href="qobject.html#a2">QObject.</a>
<h3 class="fn">QWExtra*<a name="q4"></a>QWidget::extraData() <code>[protected]</code></h3>
<p>For internal use only.
<h3 class="fn">QWidget*<a name="t9"></a>QWidget::find(WIdid) <code>[static]</code></h3>
<p>Returns a pointer to the widget with window identifer/handle <em>id.</em>
<p>The window identifier type depends by the underlying window system,
see <a href="qwindowdefs-h.html">qwindowdefs.h</a> for the actual definition.
If there is no widget with this identifier, a null pointer is returned.
<p>See also:  <a href="qwidget.html#u0">wmapper</a>() and id().
<h3 class="fn"><a href="qfocusdata.html">QFocusData</a>*<a name="q5"></a>QWidget::focusData() <code>[protected]</code></h3>
<p>Returns a pointer to the focus data for this widget's top-level
widget.
<p>Focus data always belongs to the top-level widget.  The focus data
list contains all the widgets in this top-level widget that can
accept focus, in tab order.  An iterator points to the current focus
widget (<a href="qwidget.html#m6">focusWidget</a>() returns a pointer to this widget).
<p>This information is useful for implementing advanced versions
of <a href="qwidget.html#q3">focusNextPrevChild</a>().
<h3 class="fn">void<a name="o0"></a>QWidget::focusInEvent(<a href="qfocusevent.html">QFocusEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
keyboard focus events (focus received) for the widget.
<p>A widget must <a href="qwidget.html#i0">accept focus</a> initially in
order to receive focus events.
<p>The default implementation calls <a href="qwidget.html#k0">repaint</a>() since the widget's <a href="qcolorgroup.html">color group</a> changes from normal to active.  You
may want to call repaint(FALSE) to reduce flicker in any reimplementation.
<p>As a special case to support applications not utilizing focus,
<a href="qwidget.html#a5">Top-level widgets</a> that have
<a href="qwidget.html#h9">NoFocus policy</a> will receive focus events and
gain keyboard events, but the repaint is not done by default.
<p>See also:  <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>(), <a href="qwidget.html#n8">keyPressEvent</a>(), <a href="qwidget.html#n9">keyReleaseEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qfocusevent.html">QFocusEvent</a>.
<p>Reimplemented in <a href="qslider.html#c7">QSlider</a>, <a href="qpushbutton.html#c0">QPushButton</a>, <a href="qlistbox.html#g6">QListBox</a>, <a href="qbutton.html#d2">QButton</a>, <a href="qmultilineedit.html#d8">QMultiLineEdit</a>, <a href="qlistview.html#f6">QListView</a>, <a href="qlineedit.html#d5">QLineEdit</a> and <a href="qcombobox.html#f6">QComboBox</a>.
<h3 class="fn">bool<a name="q3"></a>QWidget::focusNextPrevChild(boolnext) <code>[virtualprotected]</code></h3>
<p>Finds a new widget to give the keyboard focus to, as appropriate for
Tab/shift-Tab, and returns TRUE if is can find a new widget and
FALSE if it can't,
<p>If <em>next</em> is true, this function searches "forwards", if <em>next</em> is
FALSE, "backwards".
<p>Sometimes, you will want to reimplement this function.  For example,
a web browser might reimplement it to move its "current active link"
forwards or backwards, and call QWidget::focusNextPrevChild() only
when it reaches the last/first.
<p>Child widgets call focusNextPrevChild() on their parent widgets, and
only the top-level widget will thus make the choice of where to redirect
focus.  By overriding this method for an object, you thus gain control
of focus traversal for all child widgets.
<p>See also:  <a href="qwidget.html#q5">focusData</a>().
<p>Reimplemented in <a href="qscrollview.html#f1">QScrollView</a>.
<h3 class="fn">void<a name="o1"></a>QWidget::focusOutEvent(<a href="qfocusevent.html">QFocusEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
keyboard focus events (focus lost) for the widget.
<p>A widget must <a href="qwidget.html#i0">accept focus</a> initially in
order to receive focus events.
<p>The default implementation calls <a href="qwidget.html#k0">repaint</a>() since the widget's <a href="qcolorgroup.html">color group</a> changes from active to normal.  You
may want to call repaint(FALSE) to reduce flicker in any reimplementation.
<p>See also:  <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>(), <a href="qwidget.html#n8">keyPressEvent</a>(), <a href="qwidget.html#n9">keyReleaseEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qfocusevent.html">QFocusEvent</a>.
<p>Reimplemented in <a href="qlistbox.html#g7">QListBox</a>, <a href="qbutton.html#d3">QButton</a>, <a href="qmultilineedit.html#d9">QMultiLineEdit</a>, <a href="qlistview.html#f7">QListView</a> and <a href="qlineedit.html#d6">QLineEdit</a>.
<h3 class="fn">QWidget::FocusPolicy<a name="h9"></a>QWidget::focusPolicy()const</h3>
<p>Returns <code>QWidget::TabFocus</code> if the widget accepts focus by tabbing, <code>QWidget::ClickFocus</code> if the widget accepts focus by clicking, <code>QWidget::StrongFocus</code> if it accepts both and <code>QWidget::NoFocus</code> if it
does not accept focus at all.
<p>See also:  <a href="qwidget.html#h8">isFocusEnabled</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#n8">keyPressEvent</a>(), <a href="qwidget.html#n9">keyReleaseEvent</a>() and <a href="qwidget.html#a9">isEnabled</a>().
<h3 class="fn">QWidget*<a name="i6"></a>QWidget::focusProxy()const</h3>
<p>Returns a pointer to the focus proxy, or 0 if there is no focus
proxy.
<p>See also:  <a href="qwidget.html#i5">setFocusProxy</a>().
<h3 class="fn">QWidget*<a name="m6"></a>QWidget::focusWidget()const</h3>
<p>Returns the focus widget in this widget's window.  This
is not the same as <a href="qapplication.html#c6">QApplication::focusWidget</a>(), which returns the
focus widget in the currently active window.
<h3 class="fn">const<a href="qfont.html">QFont</a>&amp;<a name="f8"></a>QWidget::font()const</h3>
<p>Returns the font currently set for the widget.
<p><a href="qwidget.html#g1">fontInfo</a>() tells you what font is actually being used.
<p>See also:  <a href="qwidget.html#f9">setFont</a>(), <a href="qwidget.html#g1">fontInfo</a>() and <a href="qwidget.html#g0">fontMetrics</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#font">grapher/grapher.cpp</a>
 <a href="hello-hello-cpp.html#font">hello/hello.cpp</a>
 <a href="xform-xform-cpp.html#font">xform/xform.cpp</a>
<h3 class="fn">void<a name="p3"></a>QWidget::fontChange(const<a href="qfont.html">QFont</a>&amp;oldFont) <code>[virtualprotected]</code></h3>
<p>This virtual function is called from <a href="qwidget.html#f9">setFont</a>().  <em>oldFont</em> is the
previous font; you can get the new font from <a href="qwidget.html#f8">font</a>().
<p>Reimplement this function if your widget needs to know when its font
changes.  You will almost certainly need to update the widget using
either <a href="qwidget.html#k0">repaint</a>(TRUE) or <a href="qwidget.html#j6">update</a>().
<p>The default implementation calls update().
<p>See also:  <a href="qwidget.html#f9">setFont</a>(), <a href="qwidget.html#f8">font</a>(), <a href="qwidget.html#k0">repaint</a>() and <a href="qwidget.html#j6">update</a>().
<p>Reimplemented in <a href="qspinbox.html#d4">QSpinBox</a> and <a href="qmenubar.html#b2">QMenuBar</a>.
<h3 class="fn"><a href="qfontinfo.html">QFontInfo</a><a name="g1"></a>QWidget::fontInfo()const</h3>
<p>Returns the font info for the widget.
<p>The font info object is automatically updated if somebody sets a new
widget font. We have decided to change this policy in Qt 2.0: setting
a new font for a widget should not affect existing <a href="qfontinfo.html">QFontInfo</a> objects.
<p>See also:  <a href="qwidget.html#f8">font</a>(), <a href="qwidget.html#g0">fontMetrics</a>() and <a href="qwidget.html#f9">setFont</a>().
<p>Examples:
 <a href="xform-xform-cpp.html#fontInfo">xform/xform.cpp</a>
<h3 class="fn"><a href="qfontmetrics.html">QFontMetrics</a><a name="g0"></a>QWidget::fontMetrics()const</h3>
<p>Returns the font metrics for the widget.
<p>The font metrics object is automatically updated if somebody sets a new
widget font. We have decided to change this policy in Qt 2.0: setting
a new font for a widget should not affect existing <a href="qfontmetrics.html">QFontMetrics</a> objects.
<p>See also:  <a href="qwidget.html#f8">font</a>(), <a href="qwidget.html#g1">fontInfo</a>() and <a href="qwidget.html#f9">setFont</a>().
<p>Examples:
 <a href="drawdemo-drawdemo-cpp.html#fontMetrics">drawdemo/drawdemo.cpp</a>
 <a href="xform-xform-cpp.html#fontMetrics">xform/xform.cpp</a>
 <a href="qmag-qmag-cpp.html#fontMetrics">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#fontMetrics">showimg/showimg.cpp</a>
 <a href="widgets-widgets-cpp.html#fontMetrics">widgets/widgets.cpp</a>
<h3 class="fn">QWidget::PropagationMode<a name="g2"></a>QWidget::fontPropagation()const</h3>
<p>Returns the font propagation mode of this widget.  The default
font propagation mode is <code>NoChildren,</code> but you can set it to <em>SameFont</em> or <em>AllChildren.</em>
<p>See also:  <a href="qwidget.html#g3">setFontPropagation</a>().
<h3 class="fn">const<a href="qcolor.html">QColor</a>&amp;<a name="f1"></a>QWidget::foregroundColor()const</h3>
<p>Returns the foreground color of this widget.
<p>The foreground color equals <code><a href="qwidget.html#f5">colorGroup</a>().foreground()</code>.
<p>See also:  <a href="qwidget.html#f0">backgroundColor</a>() and <a href="qwidget.html#f5">colorGroup</a>().
<p>Examples:
 <a href="aclock-aclock-cpp.html#foregroundColor">aclock/aclock.cpp</a>
<h3 class="fn">const<a href="qrect.html">QRect</a>&amp;<a name="b3"></a>QWidget::frameGeometry()const</h3>
<p>Returns the geometry of the widget, relative to its parent and
including the window frame.
<p>See also:  <a href="qwidget.html#b4">geometry</a>(), <a href="qwidget.html#b5">x</a>(), <a href="qwidget.html#b6">y</a>() and <a href="qwidget.html#b7">pos</a>().
<h3 class="fn">const<a href="qrect.html">QRect</a>&amp;<a name="b4"></a>QWidget::geometry()const</h3>
<p>Returns the geometry of the widget, relative to its parent widget
and excluding the window frame.
<p>See also:  <a href="qwidget.html#b3">frameGeometry</a>(), <a href="qwidget.html#b8">size</a>() and <a href="qwidget.html#c1">rect</a>().
<p>Examples:
 <a href="qmag-qmag-cpp.html#geometry">qmag/qmag.cpp</a>
<h3 class="fn">WFlags<a name="p8"></a>QWidget::getWFlags()const <code>[protected]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="j0"></a>QWidget::grabKeyboard()</h3>
<p>Grabs all keyboard input.
<p>This widget will receive all keyboard events, independent of the active
window.<p><strong>Warning:</strong> Grabbing the keyboard might lock the terminal.
<p>See also:  <a href="qwidget.html#j1">releaseKeyboard</a>(), <a href="qwidget.html#i7">grabMouse</a>() and <a href="qwidget.html#i9">releaseMouse</a>().
<h3 class="fn">void<a name="i7"></a>QWidget::grabMouse()</h3>
<p>Grabs the mouse input.
<p>This widget will be the only one to receive mouse events until
<a href="qwidget.html#i9">releaseMouse</a>() is called.<p><strong>Warning:</strong> Grabbing the mouse might lock the terminal.
<p>It is almost never necessary to grab the mouse when using Qt since
Qt grabs and releases it sensibly.  In particular, Qt grabs the
mouse when a button is pressed and keeps it until the last button is
released.
<p>See also:  <a href="qwidget.html#i9">releaseMouse</a>(), <a href="qwidget.html#j0">grabKeyboard</a>() and <a href="qwidget.html#j1">releaseKeyboard</a>().
<p>Examples:
 <a href="qmag-qmag-cpp.html#grabMouse">qmag/qmag.cpp</a>
<h3 class="fn">void<a name="i8"></a>QWidget::grabMouse(const<a href="qcursor.html">QCursor</a>&amp;cursor)</h3>
<p>Grabs the mouse intput and changes the cursor shape.
<p>The cursor will assume shape <em>cursor</em> (for as long as the mouse focus is
grabbed) and this widget will be the only one to receive mouse events
until <a href="qwidget.html#i9">releaseMouse</a>() is called().<p><strong>Warning:</strong> Grabbing the mouse might lock the terminal.
<p>See also:  <a href="qwidget.html#i9">releaseMouse</a>(), <a href="qwidget.html#j0">grabKeyboard</a>(), <a href="qwidget.html#j1">releaseKeyboard</a>() and <a href="qwidget.html#g7">setCursor</a>().
<h3 class="fn">bool<a name="i1"></a>QWidget::hasFocus()const</h3>
<p>Returns TRUE if this widget (or its focus proxy) has the keyboard
input focus, otherwise FALSE.
<p>Equivalent to <code>qApp-><a href="qwidget.html#m6">focusWidget</a>() == this</code>.
<p>See also:  <a href="qwidget.html#i2">setFocus</a>(), <a href="qwidget.html#i3">clearFocus</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>() and <a href="qapplication.html#c6">QApplication::focusWidget</a>().
<h3 class="fn">bool<a name="h1"></a>QWidget::hasMouseTracking()const</h3>
<p>Returns TRUE if mouse tracking is enabled for this widget, or FALSE
if mouse tracking is disabled.
<p>See also:  <a href="qwidget.html#h5">setMouseTracking</a>().
<h3 class="fn">int<a name="c0"></a>QWidget::height()const</h3>
<p>Returns the height of the widget, excluding the window frame.
<p>See also:  <a href="qwidget.html#b4">geometry</a>(), <a href="qwidget.html#b9">width</a>() and <a href="qwidget.html#b8">size</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#height">grapher/grapher.cpp</a>
 <a href="tooltip-tooltip-cpp.html#height">tooltip/tooltip.cpp</a>
 <a href="drawdemo-drawdemo-cpp.html#height">drawdemo/drawdemo.cpp</a>
 <a href="xform-xform-cpp.html#height">xform/xform.cpp</a>
 <a href="aclock-aclock-cpp.html#height">aclock/aclock.cpp</a>
 <a href="pref-pref-cpp.html#height">pref/pref.cpp</a>
 <a href="qmag-qmag-cpp.html#height">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#height">showimg/showimg.cpp</a>
<h3 class="fn">void<a name="k3"></a>QWidget::hide() <code>[virtualslot]</code></h3>
<p>Hides the widget.
<p>The <a href="qapplication.html#e9">QApplication::lastWindowClosed</a>() signal is emitted when the last
visible top level widget is hidden,
<p>See also:  <a href="qwidget.html#k2">show</a>(), <a href="qwidget.html#k4">iconify</a>() and <a href="qwidget.html#k6">isVisible</a>().
<p>Examples:
 <a href="xform-xform-cpp.html#hide">xform/xform.cpp</a>
 <a href="progress-progress-cpp.html#QWidget::hide">progress/progress.cpp</a>
<p>Reimplemented in <a href="qpopupmenu.html#a8">QPopupMenu</a> and <a href="qmenubar.html#a4">QMenuBar</a>.
<h3 class="fn">const<a href="qpixmap.html">QPixmap</a>*<a name="g9"></a>QWidget::icon()const</h3>
<p>Returns the widget icon pixmap, or null if no icon has been set.
<p>See also:  <a href="qwidget.html#h3">setIcon</a>(), <a href="qwidget.html#h0">iconText</a>() and <a href="qwidget.html#g8">caption</a>().
<h3 class="fn">constchar*<a name="h0"></a>QWidget::iconText()const</h3>
<p>Returns the widget icon text, or null if no icon text has been set.
<p>See also:  <a href="qwidget.html#h4">setIconText</a>(), <a href="qwidget.html#g9">icon</a>() and <a href="qwidget.html#g8">caption</a>().
<h3 class="fn">void<a name="k4"></a>QWidget::iconify() <code>[slot]</code></h3>
<p>Iconifies the widget.
<p>Calling this function has no effect for other than <a href="qwidget.html#a5">top-level widgets</a>.
<p>See also:  <a href="qwidget.html#k2">show</a>(), <a href="qwidget.html#k3">hide</a>() and <a href="qwidget.html#k6">isVisible</a>().
<h3 class="fn">bool<a name="h6"></a>QWidget::isActiveWindow()const</h3>
<p>Returns TRUE if the top-level widget containing this widget is the
active window.
<p>See also:  <a href="qwidget.html#h7">setActiveWindow</a>() and <a href="qwidget.html#e7">topLevelWidget</a>().
<h3 class="fn">bool<a name="a8"></a>QWidget::isDesktop()const</h3>
<p>Returns TRUE if the widget is a desktop widget, otherwise FALSE.
<p>A desktop widget is also a top-level widget.
<p>See also:  <a href="qwidget.html#a5">isTopLevel</a>() and <a href="qapplication.html#h4">QApplication::desktop</a>().
<h3 class="fn">bool<a name="a9"></a>QWidget::isEnabled()const</h3>
<p>Returns TRUE if the widget is enabled, or FALSE if it is disabled.
<p>See also:  <a href="qwidget.html#b2">setEnabled</a>().
<h3 class="fn">bool<a name="b0"></a>QWidget::isEnabledTo(QWidget*ancestor)const</h3>
<p>Returns TRUE if this widget and every parent up to but excluding
<em>ancestor</em> is enabled, otherwise returns FALSE.
<p>See also:  <a href="qwidget.html#b2">setEnabled</a>() and <a href="qwidget.html#a9">isEnabled</a>().
<h3 class="fn">bool<a name="b1"></a>QWidget::isEnabledToTLW()const</h3>
<p>Returns TRUE if this widget and every parent up to the <a href="qwidget.html#e7">top level widget</a> is enabled, otherwise
returns FALSE.
<p>This is equivalent to <a href="qwidget.html#b0">isEnabledTo</a>(0).
<p>See also:  <a href="qwidget.html#b2">setEnabled</a>() and <a href="qwidget.html#a9">isEnabled</a>().
<h3 class="fn">bool<a name="h8"></a>QWidget::isFocusEnabled()const</h3>
<p>Returns TRUE if the widget accepts keyboard focus, or FALSE if it does
not.
<p>Keyboard focus is initially disabled (i.e. <a href="qwidget.html#h9">focusPolicy</a>() ==
<code>QWidget::NoFocus).</code>
<p>You must enable keyboard focus for a widget if it processes keyboard
events. This is normally done from the widget's constructor.  For
instance, the <a href="qlineedit.html">QLineEdit</a> constructor calls
<a href="qwidget.html#i0">setFocusPolicy</a>(<code>QWidget::StrongFocus).</code>
<p>See also:  <a href="qwidget.html#i0">setFocusPolicy</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#n8">keyPressEvent</a>(), <a href="qwidget.html#n9">keyReleaseEvent</a>() and <a href="qwidget.html#a9">isEnabled</a>().
<h3 class="fn">bool<a name="a6"></a>QWidget::isModal()const</h3>
<p>Returns TRUE if the widget is a modal widget, otherwise FALSE.
<p>A modal widget is also a top-level widget.
<p>See also:  <a href="qwidget.html#a5">isTopLevel</a>() and <a href="qdialog.html">QDialog</a>.
<h3 class="fn">bool<a name="a7"></a>QWidget::isPopup()const</h3>
<p>Returns TRUE if the widget is a popup widget, otherwise FALSE.
<p>A popup widget is created by specifying the widget flag <code>WType_Popup</code>
to the widget constructor.
<p>A popup widget is also a top-level widget.
<p>See also:  <a href="qwidget.html#a5">isTopLevel</a>().
<h3 class="fn">bool<a name="a5"></a>QWidget::isTopLevel()const</h3>
<p>Returns TRUE if the widget is a top-level widget, otherwise FALSE.
<p>A top-level widget is a widget which usually has a frame and a <a href="qwidget.html#h2">caption</a> (title bar). <a href="qwidget.html#a7">Popup</a>
and <a href="qwidget.html#a8">desktop</a> widgets are also top-level
widgets. Modal <a href="qdialog.html">dialog</a> widgets are the only
top-level widgets that can have <a href="qwidget.html#m9">parent
widgets</a>; all other top-level widgets have null parents.  Child
widgets are the opposite of top-level widgets.
<p>See also:  <a href="qwidget.html#e7">topLevelWidget</a>(), <a href="qwidget.html#a6">isModal</a>(), <a href="qwidget.html#a7">isPopup</a>(), <a href="qwidget.html#a8">isDesktop</a>() and <a href="qwidget.html#m9">parentWidget</a>().
<h3 class="fn">bool<a name="j4"></a>QWidget::isUpdatesEnabled()const</h3>
<p>Returns TRUE if updates are enabled, otherwise FALSE.
<p>See also:  <a href="qwidget.html#j5">setUpdatesEnabled</a>().
<h3 class="fn">bool<a name="k6"></a>QWidget::isVisible()const</h3>
<p>Returns TRUE if the widget itself is set to visible status, or else
FALSE.  Calling <a href="qwidget.html#k2">show</a>() sets the widget to visible status; calling
<a href="qwidget.html#k3">hide</a>() sets it to hidden status. Iconified top-level widgets also
have hidden status.
<p>If a widget is set to visible status, but its parent widget is set
to hidden status, this function returns TRUE.  <a href="qwidget.html#k8">isVisibleToTLW</a>()
looks at the visibility status of the parent widgets up to the
top level widget.
<p>This function returns TRUE if the widget currently is obscured by
other windows on the screen, but would be visible if moved.
<p>See also:  <a href="qwidget.html#k2">show</a>(), <a href="qwidget.html#k3">hide</a>() and <a href="qwidget.html#k8">isVisibleToTLW</a>().
<h3 class="fn">bool<a name="k7"></a>QWidget::isVisibleTo(QWidget*ancestor)const</h3>
<p>Returns TRUE if this widget and every parent up to but excluding
<em>ancestor</em> is visible, otherwise returns FALSE.
<p>This function returns TRUE if the widget it is obscured by other
windows on the screen, but would be visible if moved.
<p>See also:  <a href="qwidget.html#k2">show</a>(), <a href="qwidget.html#k3">hide</a>() and <a href="qwidget.html#k6">isVisible</a>().
<h3 class="fn">bool<a name="k8"></a>QWidget::isVisibleToTLW()const</h3>
<p>Returns TRUE if this widget and every parent up to the <a href="qwidget.html#e7">top level widget</a> is visible, otherwise
returns FALSE.
<p>This function returns TRUE if the widget it is obscured by other
windows on the screen, but would be visible if moved.
<p>This is equivalent to <a href="qwidget.html#k7">isVisibleTo</a>(0).
<p>See also:  <a href="qwidget.html#k2">show</a>(), <a href="qwidget.html#k3">hide</a>() and <a href="qwidget.html#k6">isVisible</a>().
<h3 class="fn">void<a name="n8"></a>QWidget::keyPressEvent(<a href="qkeyevent.html">QKeyEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
key press events for the widget.
<p>A widget must <a href="qwidget.html#i0">accept focus</a> initially
and <a href="qwidget.html#i1">have focus</a> in order to receive a key press
event.
<p>If you reimplement this handler, it is very important that you <a href="qkeyevent.html">ignore()</a> the press if you do not understand it, so
that the widget's parent can interpret it.
<p>The default implementation ignores the event.
<p>As a special case to support applications not utilizing focus,
<a href="qwidget.html#a5">Top-level widgets</a> that have
NoFocus policy will receive keyboard events.
<p>See also:  <a href="qwidget.html#n9">keyReleaseEvent</a>(), <a href="qkeyevent.html#a6">QKeyEvent::ignore</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qkeyevent.html">QKeyEvent</a>.
<p>Reimplemented in <a href="qslider.html#c3">QSlider</a>, <a href="qlistbox.html#g5">QListBox</a>, <a href="qbutton.html#c7">QButton</a>, <a href="qtabbar.html#c0">QTabBar</a>, <a href="qmultilineedit.html#d7">QMultiLineEdit</a>, <a href="qlistview.html#f8">QListView</a>, <a href="qpopupmenu.html#c6">QPopupMenu</a>, <a href="qmessagebox.html#c3">QMessageBox</a>, <a href="qscrollbar.html#b9">QScrollBar</a>, <a href="qlineedit.html#d4">QLineEdit</a>, <a href="qdialog.html#b5">QDialog</a>, <a href="qradiobutton.html#a9">QRadioButton</a>, <a href="qfiledialog.html#d9">QFileDialog</a>, <a href="qmenubar.html#b6">QMenuBar</a> and <a href="qcombobox.html#f5">QComboBox</a>.
<h3 class="fn">void<a name="n9"></a>QWidget::keyReleaseEvent(<a href="qkeyevent.html">QKeyEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
key release events for the widget.
<p>A widget must <a href="qwidget.html#i0">accept focus</a> initially
and <a href="qwidget.html#i1">have focus</a> in order to receive a key
release event.
<p>If you reimplement this handler, it is very important that you <a href="qkeyevent.html">ignore()</a> the release if you do not understand it,
so that the widget's parent can interpret it.
<p>The default implementation ignores the event.
<p>See also:  <a href="qwidget.html#n8">keyPressEvent</a>(), <a href="qkeyevent.html#a6">QKeyEvent::ignore</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qkeyevent.html">QKeyEvent</a>.
<h3 class="fn">QWidget*<a name="u3"></a>QWidget::keyboardGrabber() <code>[static]</code></h3>
<p>Returns a pointer to the widget that is currently grabbing the
keyboard input.
<p>If no widget in this application is currently grabbing the keyboard, 0
is returned.
<p>See also:  <a href="qwidget.html#i7">grabMouse</a>() and <a href="qwidget.html#u2">mouseGrabber</a>().
<h3 class="fn">void<a name="o3"></a>QWidget::leaveEvent(<a href="qevent.html">QEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
widget leave events.
<p>A leave event is sent to the widget when the mouse cursor leaves
the widget.
<p>The default implementation does nothing.
<p>See also:  <a href="qwidget.html#o2">enterEvent</a>(), <a href="qwidget.html#n7">mouseMoveEvent</a>() and <a href="qwidget.html#n3">event</a>().
<p>Reimplemented in <a href="qtoolbutton.html#b9">QToolButton</a>, <a href="qmultilineedit.html#e1">QMultiLineEdit</a>, <a href="qxtwidget.html#a9">QXtWidget</a>, <a href="qlineedit.html#e0">QLineEdit</a> and <a href="qmenubar.html#b8">QMenuBar</a>.
<h3 class="fn">void<a name="l0"></a>QWidget::lower() <code>[slot]</code></h3>
<p>Lowers the widget to the bottom of the parent widget's stack.
<p>If there are siblings of this widget that overlap it on the screen, this
widget will be obscured by its siblings afterwards.
<p>See also:  <a href="qwidget.html#k9">raise</a>().
<h3 class="fn"><a href="qpoint.html">QPoint</a><a name="e4"></a>QWidget::mapFromGlobal(const<a href="qpoint.html">QPoint</a>&amp;pos)const</h3>
<p>Translates the global screen coordinate <em>pos</em> to widget coordinates.
<p>See also:  <a href="qwidget.html#e3">mapToGlobal</a>().
<h3 class="fn"><a href="qpoint.html">QPoint</a><a name="e6"></a>QWidget::mapFromParent(const<a href="qpoint.html">QPoint</a>&amp;p)const</h3>
<p>Translates the parent widget coordinate <em>pos</em> to widget coordinates.
<p>Same as <a href="qwidget.html#e4">mapFromGlobal</a>() if the widget has no parent.
<p>See also:  <a href="qwidget.html#e5">mapToParent</a>().
<h3 class="fn"><a href="qpoint.html">QPoint</a><a name="e3"></a>QWidget::mapToGlobal(const<a href="qpoint.html">QPoint</a>&amp;pos)const</h3>
<p>Translates the widget coordinate <em>pos</em> to global screen coordinates.
For example, <pre> mapToGlobal(<a href="qpoint.html">QPoint</a>(0,0))</pre>
 would give the
global coordinates of the top-left pixel of the widget.
<p>See also:  <a href="qwidget.html#e4">mapFromGlobal</a>().
<h3 class="fn"><a href="qpoint.html">QPoint</a><a name="e5"></a>QWidget::mapToParent(const<a href="qpoint.html">QPoint</a>&amp;p)const</h3>
<p>Translates the widget coordinate <em>pos</em> to a coordinate in the parent widget.
<p>Same as <a href="qwidget.html#e3">mapToGlobal</a>() if the widget has no parent.
<p>See also:  <a href="qwidget.html#e6">mapFromParent</a>().
<h3 class="fn"><a href="qsize.html">QSize</a><a name="c4"></a>QWidget::maximumSize()const</h3>
<p>Returns the maximum widget size.
<p>The widget cannot be resized to a larger size than the maximum widget
size.
<p>See also:  <a href="qwidget.html#c8">setMaximumSize</a>(), <a href="qwidget.html#c3">minimumSize</a>() and <a href="qwidget.html#d6">sizeIncrement</a>().
<h3 class="fn">int<a name="p4"></a>QWidget::metric(intm)const <code>[virtualprotected]</code></h3>
<p>Internal implementation of the virtual <a href="qpaintdevice.html#a8">QPaintDevice::metric</a>() function.
<p>Use the <a href="qpaintdevicemetrics.html">QPaintDeviceMetrics</a> class instead.
<p>Reimplemented from <a href="qpaintdevice.html#a8">QPaintDevice.</a>
<h3 class="fn"><a href="qsize.html">QSize</a><a name="c3"></a>QWidget::minimumSize()const</h3>
<p>Returns the minimum widget size.
<p>The widget cannot be resized to a smaller size than the minimum widget
size.
<p>See also:  <a href="qwidget.html#c6">setMinimumSize</a>(), <a href="qwidget.html#c4">maximumSize</a>() and <a href="qwidget.html#d6">sizeIncrement</a>().
<h3 class="fn">void<a name="n6"></a>QWidget::mouseDoubleClickEvent(<a href="qmouseevent.html">QMouseEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
mouse double click events for the widget.
<p>The default implementation generates a normal mouse press event.
<p>Note that the widgets gets a <a href="qwidget.html#n4">mousePressEvent</a>() and a <a href="qwidget.html#n5">mouseReleaseEvent</a>()
before the mouseDoubleClickEvent().
<p>See also:  <a href="qwidget.html#n4">mousePressEvent</a>(), <a href="qwidget.html#n5">mouseReleaseEvent</a>(), <a href="qwidget.html#n7">mouseMoveEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Reimplemented in <a href="qlistbox.html#g3">QListBox</a>, <a href="qmultilineedit.html#d6">QMultiLineEdit</a>, <a href="qlistview.html#f5">QListView</a>, <a href="qlineedit.html#d3">QLineEdit</a> and <a href="qcombobox.html#f4">QComboBox</a>.
<h3 class="fn">QWidget*<a name="u2"></a>QWidget::mouseGrabber() <code>[static]</code></h3>
<p>Returns a pointer to the widget that is currently grabbing the
mouse input.
<p>If no widget in this application is currently grabbing the mouse, 0 is
returned.
<p>See also:  <a href="qwidget.html#i7">grabMouse</a>() and <a href="qwidget.html#u3">keyboardGrabber</a>().
<h3 class="fn">void<a name="n7"></a>QWidget::mouseMoveEvent(<a href="qmouseevent.html">QMouseEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
mouse move events for the widget.
<p>If mouse tracking is switched off, mouse move events only occur if a
mouse button is down while the mouse is being moved.  If mouse
tracking is switched on, mouse move events occur even if no mouse
button is down.
<p><a href="qmouseevent.html#a2">QMouseEvent::pos</a>() reports the position of the mouse cursor, relative to
this widget.  For press and release events, the position is usually
the same as the position of the last mouse move event, but it might be
different if the user moves and clicks the mouse fast.  This is
a feature of the underlying window system, not Qt.
<p>The default implementation does nothing.
<p>See also:  <a href="qwidget.html#h5">setMouseTracking</a>(), <a href="qwidget.html#n4">mousePressEvent</a>(), <a href="qwidget.html#n5">mouseReleaseEvent</a>(), <a href="qwidget.html#n6">mouseDoubleClickEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Reimplemented in <a href="qslider.html#c6">QSlider</a>, <a href="qlistbox.html#g4">QListBox</a>, <a href="qbutton.html#d0">QButton</a>, <a href="qmultilineedit.html#d4">QMultiLineEdit</a>, <a href="qlistview.html#f4">QListView</a>, <a href="qpopupmenu.html#c5">QPopupMenu</a>, <a href="qscrollbar.html#c4">QScrollBar</a>, <a href="qlineedit.html#d1">QLineEdit</a>, <a href="qmenubar.html#b5">QMenuBar</a> and <a href="qcombobox.html#f2">QComboBox</a>.
<h3 class="fn">void<a name="n4"></a>QWidget::mousePressEvent(<a href="qmouseevent.html">QMouseEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
mouse press events for the widget.
<p>The default implementation does nothing.
<p>If you create new widgets in the mousePressEvent() the
<a href="qwidget.html#n5">mouseReleaseEvent</a>() may not end up where you expect, depending on the
underlying window system (or X11 window manager), the widgets'
location and maybe more.
<p>See also:  <a href="qwidget.html#n5">mouseReleaseEvent</a>(), <a href="qwidget.html#n6">mouseDoubleClickEvent</a>(), <a href="qwidget.html#n7">mouseMoveEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Reimplemented in <a href="qslider.html#c4">QSlider</a>, <a href="qlistbox.html#g1">QListBox</a>, <a href="qtabbar.html#b8">QTabBar</a>, <a href="qbutton.html#c8">QButton</a>, <a href="qmultilineedit.html#d3">QMultiLineEdit</a>, <a href="qlistview.html#f2">QListView</a>, <a href="qpopupmenu.html#c3">QPopupMenu</a>, <a href="qscrollbar.html#c2">QScrollBar</a>, <a href="qlineedit.html#d0">QLineEdit</a>, <a href="qmenubar.html#b3">QMenuBar</a> and <a href="qcombobox.html#f1">QComboBox</a>.
<h3 class="fn">void<a name="n5"></a>QWidget::mouseReleaseEvent(<a href="qmouseevent.html">QMouseEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
mouse release events for the widget.
<p>The default implementation does nothing.
<p>See also:  mouseReleaseEvent(), <a href="qwidget.html#n6">mouseDoubleClickEvent</a>(), <a href="qwidget.html#n7">mouseMoveEvent</a>(), <a href="qwidget.html#n3">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Reimplemented in <a href="qslider.html#c5">QSlider</a>, <a href="qlistbox.html#g2">QListBox</a>, <a href="qtabbar.html#b9">QTabBar</a>, <a href="qbutton.html#c9">QButton</a>, <a href="qmultilineedit.html#d5">QMultiLineEdit</a>, <a href="qlistview.html#f3">QListView</a>, <a href="qpopupmenu.html#c4">QPopupMenu</a>, <a href="qscrollbar.html#c3">QScrollBar</a>, <a href="qlineedit.html#d2">QLineEdit</a>, <a href="qradiobutton.html#a8">QRadioButton</a>, <a href="qmenubar.html#b4">QMenuBar</a> and <a href="qcombobox.html#f3">QComboBox</a>.
<h3 class="fn">void<a name="l1"></a>QWidget::move(intx, inty) <code>[virtualslot]</code></h3>
<p>Moves the widget to the position <em>(x,y)</em> relative to the parent widget.
<p>A <a href="qwidget.html#o5">move event</a> is generated immediately if
the widget is visible. If the widget is invisible, the move event
is generated when <a href="qwidget.html#k2">show</a>() is called.
<p>This function is virtual, and all other overloaded move()
implementations call it.<p><strong>Warning:</strong> If you call move() or <a href="qwidget.html#l5">setGeometry</a>() from <a href="qwidget.html#o5">moveEvent</a>(), you
may see infinite recursion.
<p>See also:  <a href="qwidget.html#b7">pos</a>(), <a href="qwidget.html#l3">resize</a>(), <a href="qwidget.html#l5">setGeometry</a>() and <a href="qwidget.html#o5">moveEvent</a>().
<p>Examples:
 <a href="xform-xform-cpp.html#move">xform/xform.cpp</a>
<p>Reimplemented in <a href="qsemimodal.html#a3">QSemiModal</a> and <a href="qdialog.html#a5">QDialog</a>.
<h3 class="fn">void<a name="l2"></a>QWidget::move(const<a href="qpoint.html">QPoint</a>&amp;) <code>[slot]</code></h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<p>Examples:
 <a href="drawdemo-drawdemo-cpp.html#move">drawdemo/drawdemo.cpp</a>
 <a href="xform-xform-cpp.html#move">xform/xform.cpp</a>
<h3 class="fn">void<a name="o5"></a>QWidget::moveEvent(<a href="qmoveevent.html">QMoveEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
widget move events.  When the widget receives this event, it is
already at the new position.
<p>The old position is accessible through <a href="qmoveevent.html#a2">QMoveEvent::oldPos</a>().
<p>The default implementation does nothing.
<p>See also:  <a href="qwidget.html#o6">resizeEvent</a>(), <a href="qwidget.html#n3">event</a>(), <a href="qwidget.html#l1">move</a>() and <a href="qmoveevent.html">QMoveEvent</a>.
<h3 class="fn">void<a name="o4"></a>QWidget::paintEvent(<a href="qpaintevent.html">QPaintEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
widget paint events.  Actually, it more or less <em>must</em> be
reimplemented.
<p>The default implementation does nothing.
<p>When the paint event occurs, the update rectangle <a href="qpaintevent.html#a1">QPaintEvent::rect</a>()
normally has been cleared to the background color or pixmap. An
exception is <a href="qwidget.html#k0">repaint</a>() with erase=FALSE.
<p>For many widgets it is sufficient to redraw the entire widget each time,
but some need to consider the update rectangle to avoid flicker or slow
update.
<p>Pixmaps can also be used to implement flicker-free update.
<p><a href="qwidget.html#j6">update</a>() and repaint() can be used to force a paint event.
<p>See also:  <a href="qwidget.html#n3">event</a>(), <a href="qwidget.html#k0">repaint</a>(), <a href="qwidget.html#j6">update</a>(), <a href="qpainter.html">QPainter</a>, <a href="qpixmap.html">QPixmap</a> and <a href="qpaintevent.html">QPaintEvent</a>.
<p>Reimplemented in <a href="qglwidget.html#b9">QGLWidget</a>, <a href="qslider.html#c2">QSlider</a>, <a href="qtabbar.html#b7">QTabBar</a>, <a href="qbutton.html#d1">QButton</a>, <a href="qtoolbar.html#b1">QToolBar</a>, <a href="qtableview.html#f3">QTableView</a>, <a href="qgroupbox.html#a6">QGroupBox</a>, <a href="qpopupmenu.html#c2">QPopupMenu</a>, <a href="qscrollbar.html#c1">QScrollBar</a>, <a href="qlineedit.html#d7">QLineEdit</a>, <a href="qframe.html#b7">QFrame</a>, <a href="qmainwindow.html#b9">QMainWindow</a>, <a href="qstatusbar.html#a7">QStatusBar</a>, <a href="qtabdialog.html#b8">QTabDialog</a> and <a href="qcombobox.html#e9">QComboBox</a>.
<h3 class="fn">const<a href="qpalette.html">QPalette</a>&amp;<a name="f6"></a>QWidget::palette()const</h3>
<p>Returns the widget palette.
<p>See also:  <a href="qwidget.html#f7">setPalette</a>(), <a href="qwidget.html#f5">colorGroup</a>() and <a href="qapplication.html#f7">QApplication::palette</a>().
<h3 class="fn">void<a name="p2"></a>QWidget::paletteChange(const<a href="qpalette.html">QPalette</a>&amp;oldPalette) <code>[virtualprotected]</code></h3>
<p>This virtual function is called from <a href="qwidget.html#f7">setPalette</a>().  <em>oldPalette</em> is the
previous palette; you can get the new palette from <a href="qwidget.html#f6">palette</a>().
<p>Reimplement this function if your widget needs to know when its palette
changes.  You will almost certainly need to update the widget using
either <a href="qwidget.html#k0">repaint</a>(TRUE) or <a href="qwidget.html#j6">update</a>().
<p>The default implementation calls update().
<p>See also:  <a href="qwidget.html#f7">setPalette</a>(), <a href="qwidget.html#f6">palette</a>(), <a href="qwidget.html#k0">repaint</a>() and <a href="qwidget.html#j6">update</a>().
<p>Reimplemented in <a href="qspinbox.html#d2">QSpinBox</a>.
<h3 class="fn">QWidget::PropagationMode<a name="g4"></a>QWidget::palettePropagation()const</h3>
<p>Returns the palette propagation mode of this widget.  The default
palette propagation mode is <code>NoChildren,</code> but you can set it to <em>SamePalette</em> or <em>AllChildren.</em>
<p>See also:  <a href="qwidget.html#g5">setPalettePropagation</a>().
<h3 class="fn">QWidget*<a name="m9"></a>QWidget::parentWidget()const</h3>
<p>Returns a pointer to the parent of this widget, or a null pointer if
it does not have any parent widget.
<h3 class="fn"><a href="qpoint.html">QPoint</a><a name="b7"></a>QWidget::pos()const</h3>
<p>Returns the postion of the widget in its parent widget, including
the window frame.
<p>See also:  <a href="qwidget.html#b3">frameGeometry</a>(), <a href="qwidget.html#b5">x</a>() and <a href="qwidget.html#b6">y</a>().
<p>Examples:
 <a href="qmag-qmag-cpp.html#pos">qmag/qmag.cpp</a>
<h3 class="fn">void<a name="k9"></a>QWidget::raise() <code>[slot]</code></h3>
<p>Raises this widget to the top of the parent widget's stack.
<p>If there are any siblings of this widget that overlap it on the screen,
this widget will be visually in front of its siblings afterwards.
<p>See also:  <a href="qwidget.html#l0">lower</a>().
<h3 class="fn">void<a name="l9"></a>QWidget::recreate(QWidget*parent, WFlagsf, const<a href="qpoint.html">QPoint</a>&amp;p, boolshowIt=FALSE)</h3>
<p>Reparents the widget.  The widget gets a new <em>parent,</em> new widget
flags (<em>f,</em> but as usual, use 0) at a new position in its new
parent (<em>p).</em>
<p>If <em>showIt</em> is TRUE, <a href="qwidget.html#k2">show</a>() is called once the widget has been
recreated.
<p>If the new parent widget is in a different top-level widget, the
reparented widget and its children are appended to the end of the
<a href="qwidget.html#i0">TAB chain</a> of the new parent widget,
in the same internal order as before.  If one of the moved widgets
had keyboard focus, recreate() calls <a href="qwidget.html#i3">clearFocus</a>() for that widget.
<p>If the new parent widget is in the same top-level widget as the old
parent, recreate doesn't change the TAB order or keyboard focus.
<p>See also:  <a href="qwidget.html#p8">getWFlags</a>().
<h3 class="fn"><a href="qrect.html">QRect</a><a name="c1"></a>QWidget::rect()const</h3>
<p>Returns the the internal geometry of the widget, excluding the window frame.
rect() equals <a href="qrect.html">QRect</a>(0,0,<a href="qwidget.html#b9">width</a>(),<a href="qwidget.html#c0">height</a>()).
<p>See also:  <a href="qwidget.html#b8">size</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#rect">grapher/grapher.cpp</a>
 <a href="desktop-desktop-cpp.html#rect">desktop/desktop.cpp</a>
 <a href="picture-picture-cpp.html#rect">picture/picture.cpp</a>
 <a href="menu-menu-cpp.html#rect">menu/menu.cpp</a>
<h3 class="fn">void<a name="j1"></a>QWidget::releaseKeyboard()</h3>
<p>Releases the keyboard grab.
<p>See also:  <a href="qwidget.html#j0">grabKeyboard</a>(), <a href="qwidget.html#i7">grabMouse</a>() and <a href="qwidget.html#i9">releaseMouse</a>().
<h3 class="fn">void<a name="i9"></a>QWidget::releaseMouse()</h3>
<p>Releases the mouse grab.
<p>See also:  <a href="qwidget.html#i7">grabMouse</a>(), <a href="qwidget.html#j0">grabKeyboard</a>() and <a href="qwidget.html#j1">releaseKeyboard</a>().
<p>Examples:
 <a href="qmag-qmag-cpp.html#releaseMouse">qmag/qmag.cpp</a>
<h3 class="fn">void<a name="k0"></a>QWidget::repaint(intx, inty, intw, inth, boolerase=TRUE) <code>[slot]</code></h3>
<p>Repaints the widget directly by calling <a href="qwidget.html#o4">paintEvent</a>() directly,
unless updates are disabled or the widget is hidden.
<p>Erases the widget area  <em>(x,y,w,h)</em> if <em>erase</em> is TRUE.
<p>If <em>w</em> is negative, it is replaced with <code><a href="qwidget.html#b9">width</a>() - x</code>.
If <em>h</em> is negative, it is replaced width <code><a href="qwidget.html#c0">height</a>() - y</code>.
<p>Doing a repaint() usually is faster than doing an <a href="qwidget.html#j6">update</a>(), but
calling update() many times in a row will generate a single paint
event.<p><strong>Warning:</strong> If you call repaint() in a function which may itself be called
from paintEvent(), you may see infinite recursion. The update() function
never generates recursion.
<p>See also:  <a href="qwidget.html#j6">update</a>(), <a href="qwidget.html#o4">paintEvent</a>(), <a href="qwidget.html#j5">setUpdatesEnabled</a>() and <a href="qwidget.html#m1">erase</a>().
<p>Examples:
 <a href="forever-forever-cpp.html#repaint">forever/forever.cpp</a>
 <a href="tooltip-tooltip-cpp.html#repaint">tooltip/tooltip.cpp</a>
 <a href="hello-hello-cpp.html#repaint">hello/hello.cpp</a>
 <a href="qmag-qmag-cpp.html#repaint">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#repaint">showimg/showimg.cpp</a>
 <a href="biff-biff-cpp.html#repaint">biff/biff.cpp</a>
<h3 class="fn">void<a name="j9"></a>QWidget::repaint(boolerase=TRUE) <code>[slot]</code></h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<p>This version repaints the entire widget.
<h3 class="fn">void<a name="k1"></a>QWidget::repaint(const<a href="qrect.html">QRect</a>&amp;r, boolerase=TRUE) <code>[slot]</code></h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<p>Examples:
 <a href="life-life-cpp.html#repaint">life/life.cpp</a>
 <a href="forever-forever-cpp.html#repaint">forever/forever.cpp</a>
 <a href="pref-pref-cpp.html#repaint">pref/pref.cpp</a>
<h3 class="fn">void<a name="l3"></a>QWidget::resize(intw, inth) <code>[virtualslot]</code></h3>
<p>Resizes the widget to size <em>w</em> by <em>h</em> pixels.
<p>A <a href="qwidget.html#o6">resize event</a> is generated immediately if
the widget is visible. If the widget is invisible, the resize event
is generated when <a href="qwidget.html#k2">show</a>() is called.
<p>The size is adjusted if it is outside the <a href="qwidget.html#c6">minimum</a> or <a href="qwidget.html#c8">maximum</a> widget size.
<p>This function is virtual, and all other overloaded resize()
implementations call it.<p><strong>Warning:</strong> If you call resize() or <a href="qwidget.html#l5">setGeometry</a>() from <a href="qwidget.html#o6">resizeEvent</a>(),
you may see infinite recursion.
<p>See also:  <a href="qwidget.html#b8">size</a>(), <a href="qwidget.html#l1">move</a>(), <a href="qwidget.html#l5">setGeometry</a>(), <a href="qwidget.html#o6">resizeEvent</a>(), <a href="qwidget.html#c3">minimumSize</a>() and <a href="qwidget.html#c4">maximumSize</a>().
<p>Examples:
 <a href="tictac-tictac-cpp.html#resize">tictac/tictac.cpp</a>
 <a href="hello-hello-cpp.html#resize">hello/hello.cpp</a>
 <a href="xform-xform-cpp.html#resize">xform/xform.cpp</a>
 <a href="layout-layout-cpp.html#resize">layout/layout.cpp</a>
 <a href="qmag-qmag-cpp.html#resize">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#resize">showimg/showimg.cpp</a>
 <a href="biff-biff-cpp.html#resize">biff/biff.cpp</a>
<p>Reimplemented in <a href="qsemimodal.html#a5">QSemiModal</a> and <a href="qdialog.html#a7">QDialog</a>.
<h3 class="fn">void<a name="l4"></a>QWidget::resize(const<a href="qsize.html">QSize</a>&amp;) <code>[slot]</code></h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<p>Examples:
 <a href="mainlyMotif-editor-cpp.html#resize">mainlyMotif/editor.cpp</a>
 <a href="table-table-cpp.html#resize">table/table.cpp</a>
 <a href="life-life-cpp.html#resize">life/life.cpp</a>
 <a href="drawdemo-drawdemo-cpp.html#resize">drawdemo/drawdemo.cpp</a>
 <a href="xform-xform-cpp.html#resize">xform/xform.cpp</a>
 <a href="application-application-cpp.html#resize">application/application.cpp</a>
 <a href="pref-pref-cpp.html#resize">pref/pref.cpp</a>
 <a href="qmag-qmag-cpp.html#resize">qmag/qmag.cpp</a>
 <a href="mainlyXt-editor-cpp.html#resize">mainlyXt/editor.cpp</a>
<h3 class="fn">void<a name="o6"></a>QWidget::resizeEvent(<a href="qresizeevent.html">QResizeEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler can be reimplemented in a subclass to receive
widget resize events.  When resizeEvent() is called, the widget
already has its new geometry.
<p>The old size is accessible through <a href="qresizeevent.html#a2">QResizeEvent::oldSize</a>().
<p>The default implementation does nothing.
<p>See also:  <a href="qwidget.html#o5">moveEvent</a>(), <a href="qwidget.html#n3">event</a>(), <a href="qwidget.html#l3">resize</a>() and <a href="qresizeevent.html">QResizeEvent</a>.
<p>Reimplemented in <a href="qslider.html#c1">QSlider</a>, <a href="qglwidget.html#c0">QGLWidget</a>, <a href="qspinbox.html#d1">QSpinBox</a>, <a href="qlistbox.html#g8">QListBox</a>, <a href="qheader.html#c6">QHeader</a>, <a href="qmultilineedit.html#e2">QMultiLineEdit</a>, <a href="qlcdnumber.html#c4">QLCDNumber</a>, <a href="qtableview.html#f4">QTableView</a>, <a href="qlistview.html#f9">QListView</a>, <a href="qmessagebox.html#c2">QMessageBox</a>, <a href="qscrollbar.html#c0">QScrollBar</a>, <a href="qlineedit.html#d9">QLineEdit</a>, <a href="qframe.html#b8">QFrame</a>, <a href="qprogressdialog.html#b9">QProgressDialog</a>, <a href="qscrollview.html#d7">QScrollView</a>, <a href="qfiledialog.html#d8">QFileDialog</a>, <a href="qmenubar.html#b7">QMenuBar</a>, <a href="qtabdialog.html#b9">QTabDialog</a> and <a href="qcombobox.html#f0">QComboBox</a>.
<h3 class="fn">void<a name="m3"></a>QWidget::scroll(intdx, intdy)</h3>
<p>Scrolls the contents of the widget <em>dx</em> pixels rightwards and <em>dy</em>
pixels downwards.  If <em>dx/dy</em> is negative, the scroll direction is
leftwards/upwards.  Child widgets are moved accordingly.
<p>The areas of the widget that are exposed will be erased and
<a href="qwidget.html#o4">paint events</a> may be generated immediately,
or after some further event processing.<p><strong>Warning:</strong> If you call scroll() in a function which may itself be
called from the <a href="qwidget.html#o5">moveEvent</a>() or <a href="qwidget.html#o4">paintEvent</a>() of a direct child of the
widget being scrolled, you may see infinite recursion.
<p>See also:  <a href="qwidget.html#m1">erase</a>() and <a href="qpaintdevice.html#b2">bitBlt</a>().
<h3 class="fn">void<a name="m7"></a>QWidget::setAcceptDrops(boolon)</h3>
<p>Announces to the system that this widget <em>may</em> be able to
accept drop events.
<p>In Qt 1.x, drop event handlers are in QDropSite.
<p>See also:  <a href="qwidget.html#m8">acceptDrops</a>().
<h3 class="fn">void<a name="h7"></a>QWidget::setActiveWindow()</h3>
<p>Sets the top-level widget containing this widget to be the active
window.
<p>An active window is a top-level window that has the keyboard input
focus.
<p>This function performs the same operation as clicking the mouse on
the title bar of a top-level window.
<p>See also:  <a href="qwidget.html#h6">isActiveWindow</a>() and <a href="qwidget.html#e7">topLevelWidget</a>().
<h3 class="fn">void<a name="f2"></a>QWidget::setBackgroundColor(const<a href="qcolor.html">QColor</a>&amp;color) <code>[virtual]</code></h3>
<p>This function is deprecated.  Use <a href="qwidget.html#e9">setBackgroundMode</a>() or <a href="qwidget.html#f7">setPalette</a>(),
as they ensure the appropriate clearing color is used when the widget
is in the Active, Normal, or Disabled state.
<p>If you want to change the color scheme of a widget, the setPalette()
function is better suited.  Here is how to set <em>thatWidget</em> to use a
light green (RGB value 80, 255, 80) as background color, with shades
of green used for all the 3D effects:
<p><pre>    thatWidget-&gt;setPalette( <a href="qpalette.html">QPalette</a>( <a href="qcolor.html">QColor</a>(80, 255, 80) ) );
</pre>
<p>See also:  <a href="qwidget.html#f7">setPalette</a>(), <a href="qapplication.html#f8">QApplication::setPalette</a>(), <a href="qwidget.html#f0">backgroundColor</a>(), <a href="qwidget.html#f4">setBackgroundPixmap</a>() and <a href="qwidget.html#e9">setBackgroundMode</a>().
<p>Examples:
 <a href="tictac-tictac-cpp.html#setBackgroundColor">tictac/tictac.cpp</a>
 <a href="desktop-desktop-cpp.html#setBackgroundColor">desktop/desktop.cpp</a>
 <a href="connect-connect-cpp.html#setBackgroundColor">connect/connect.cpp</a>
 <a href="drawdemo-drawdemo-cpp.html#setBackgroundColor">drawdemo/drawdemo.cpp</a>
 <a href="xform-xform-cpp.html#setBackgroundColor">xform/xform.cpp</a>
 <a href="layout-layout-cpp.html#setBackgroundColor">layout/layout.cpp</a>
 <a href="widgets-widgets-cpp.html#setBackgroundColor">widgets/widgets.cpp</a>
<p>Reimplemented in <a href="qtableview.html#a0">QTableView</a> and <a href="qcombobox.html#c0">QComboBox</a>.
<h3 class="fn">void<a name="e9"></a>QWidget::setBackgroundMode(BackgroundModem)</h3>
<p>Tells the window system which color to clear this widget to when
sending a paint event.
<p>In other words, this color is the color of the widget when
<a href="qwidget.html#o4">paintEvent</a>() is called.  To minimize flicker, this should be the
most common color in the widget.
<p>The following values are valid:
<p><ul>
<li> <code>PaletteForeground</code>
- use <a href="qwidget.html#f6">palette</a>() . <a href="qcolorgroup.html#a3">foreground()</a>
<li> <code>PaletteBackground</code>
- use palette() . <a href="qcolorgroup.html#a4">background()</a>
<li> <code>PaletteLight</code>
- use palette() . <a href="qcolorgroup.html#a5">light()</a>
<li> <code>PaletteMidlight</code>
- use palette() . <a href="qcolorgroup.html#a6">midlight()</a>
<li> <code>PaletteDark</code>
- use palette() . <a href="qcolorgroup.html#a7">dark()</a>
<li> <code>PaletteMid</code>
- use palette() . <a href="qcolorgroup.html#a8">mid()</a>
<li> <code>PaletteText</code>
- use palette() . <a href="qcolorgroup.html#a9">text()</a>
<li> <code>PaletteBase</code>
- use palette() . <a href="qcolorgroup.html#b0">base()</a>
<li> <code>NoBackground</code>
- no color or pixmap is used - the paintEvent() must completely
cover the drawing area.  This can help avoid flicker.
</ul>
<p>If <a href="qwidget.html#f4">setBackgroundPixmap</a>() or <a href="qwidget.html#f2">setBackgroundColor</a>() is called, the
mode will be one of:
<ul>
<li> <code>FixedPixmap</code> - the pixmap set by setBackgroundPixmap()
<li> <code>FixedColor</code> - the color set by setBackgroundColor()
</ul>
<p>These values may not be used as parameters to setBackgroundMode().
<p>For most widgets the default (PaletteBackground, normally
gray) suffices, but some need to use PaletteBase (the
background color for text output, normally white) and a few need
other colors.
<p><a href="qlistbox.html">QListBox</a>, which is "sunken" and uses the base color to contrast with
its environment, does this:
<p><pre>    setBackgroundMode( PaletteBase );
</pre>
<p>If you want to change the color scheme of a widget, the <a href="qwidget.html#f7">setPalette</a>()
function is better suited.  Here is how to set <em>thatWidget</em> to use a
light green (RGB value 80, 255, 80) as background color, with shades
of green used for all the 3D effects:
<p><pre>    thatWidget-&gt;setPalette( <a href="qpalette.html">QPalette</a>( <a href="qcolor.html">QColor</a>(80, 255, 80) ) );
</pre>
<p>You can also use <a href="qapplication.html#f8">QApplication::setPalette</a>() if you want to change
the color scheme of your entire application, or of all new widgets.
<p>Examples:
 <a href="table-table-cpp.html#setBackgroundMode">table/table.cpp</a>
 <a href="widgets-widgets-cpp.html#setBackgroundMode">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="f4"></a>QWidget::setBackgroundPixmap(const<a href="qpixmap.html">QPixmap</a>&amp;pixmap) <code>[virtual]</code></h3>
<p>Sets the background pixmap of the widget to <em>pixmap.</em>
<p>The background pixmap is tiled.  Some widgets (e.g. <a href="qlineedit.html">QLineEdit</a>) do
not work well with a background pixmap.
<p>See also:  <a href="qwidget.html#f3">backgroundPixmap</a>(), <a href="qwidget.html#p1">backgroundPixmapChange</a>() and <a href="qwidget.html#f2">setBackgroundColor</a>().
<p>Examples:
 <a href="desktop-desktop-cpp.html#setBackgroundPixmap">desktop/desktop.cpp</a>
<h3 class="fn">void<a name="q2"></a>QWidget::setCRect(const<a href="qrect.html">QRect</a>&amp;r) <code>[protected]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="h2"></a>QWidget::setCaption(constchar*caption) <code>[slot]</code></h3>
<p>Sets the window caption (title).
<p>See also:  <a href="qwidget.html#g8">caption</a>(), <a href="qwidget.html#h3">setIcon</a>() and <a href="qwidget.html#h4">setIconText</a>().
<p>Examples:
 <a href="drawdemo-drawdemo-cpp.html#setCaption">drawdemo/drawdemo.cpp</a>
 <a href="movies-main-cpp.html#setCaption">movies/main.cpp</a>
 <a href="application-application-cpp.html#setCaption">application/application.cpp</a>
 <a href="pref-pref-cpp.html#setCaption">pref/pref.cpp</a>
 <a href="progress-progress-cpp.html#setCaption">progress/progress.cpp</a>
 <a href="showimg-showimg-cpp.html#setCaption">showimg/showimg.cpp</a>
 <a href="widgets-widgets-cpp.html#setCaption">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="g7"></a>QWidget::setCursor(const<a href="qcursor.html">QCursor</a>&amp;cursor) <code>[virtual]</code></h3>
<p>Sets the widget cursor shape to <em>cursor.</em>
<p>The mouse cursor will assume this shape when it's over this widget.
See a list of predefined cursor objects with a range of useful
shapes in the <a href="qcursor.html">QCursor</a> documentation.
<p>An editor widget would for example use an I-beam cursor:
<pre>    setCursor( ibeamCursor );
</pre>
<p>See also:  <a href="qwidget.html#g6">cursor</a>() and <a href="qapplication.html#h6">QApplication::setOverrideCursor</a>().
<p>Examples:
 <a href="cursor-cursor-cpp.html#setCursor">cursor/cursor.cpp</a>
<h3 class="fn">void<a name="b2"></a>QWidget::setEnabled(boolenable) <code>[virtualslot]</code></h3>
<p>Enables widget input events if <em>enable</em> is TRUE, otherwise disables
input events.
<p>An enabled widget receives keyboard and mouse events; a disabled
widget does not.  Note that an enabled widget receives keyboard
events only when it is in focus.
<p>Some widgets display themselves differently when they are disabled.
For example a button might draw its label grayed out.
<p>See also:  <a href="qwidget.html#a9">isEnabled</a>(), <a href="qkeyevent.html">QKeyEvent</a> and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Reimplemented in <a href="qlineedit.html#b2">QLineEdit</a> and <a href="qcombobox.html#c3">QComboBox</a>.
<h3 class="fn">void<a name="q1"></a>QWidget::setFRect(const<a href="qrect.html">QRect</a>&amp;r) <code>[protected]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="e2"></a>QWidget::setFixedHeight(inth)</h3>
<p>Sets both the minimum and maximum heights of the widget to <em>h</em>
without changing the widths.  Provided for convenience.
<p>See also:  <a href="qwidget.html#l7">sizeHint</a>(), <a href="qwidget.html#c3">minimumSize</a>(), <a href="qwidget.html#c4">maximumSize</a>(), <a href="qwidget.html#d9">setFixedSize</a>() and more.
<p>Examples:
 <a href="widgets-widgets-cpp.html#setFixedHeight">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="d9"></a>QWidget::setFixedSize(const<a href="qsize.html">QSize</a>&amp;s)</h3>
<p>Sets both the minimum and maximum sizes of the widget to <em>s,</em>
thereby preventing it from ever growing or shrinking.
<p>See also:  <a href="qwidget.html#c8">setMaximumSize</a>() and <a href="qwidget.html#c6">setMinimumSize</a>().
<h3 class="fn">void<a name="e0"></a>QWidget::setFixedSize(intw, inth)</h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<p>Examples:
 <a href="pref-pref-cpp.html#setFixedSize">pref/pref.cpp</a>
 <a href="widgets-widgets-cpp.html#setFixedSize">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="e1"></a>QWidget::setFixedWidth(intw)</h3>
<p>Sets both the minimum and maximum width of the widget to <em>w</em>
without changing the heights.  Provided for convenience.
<p>See also:  <a href="qwidget.html#l7">sizeHint</a>(), <a href="qwidget.html#c3">minimumSize</a>(), <a href="qwidget.html#c4">maximumSize</a>(), <a href="qwidget.html#d9">setFixedSize</a>() and more.
<h3 class="fn">void<a name="i2"></a>QWidget::setFocus()</h3>
<p>Gives the keyboard input focus to the widget (or its focus proxy).
<p>First, a <a href="qwidget.html#o1">focus out event</a> is sent to the
focus widget (if any) to tell it that it is about to loose the
focus. Then a <a href="qwidget.html#o0">focus in event</a> is sent to
this widget to tell it that it just received the focus.
<p>setFocus() gives focus to a widget regardless of its focus policy.
However, <a href="qwidget.html#m6">QWidget::focusWidget</a>() (which determines where
Tab/shift-Tab) moves from) is changed only if the widget accepts
focus.  This can be used to implement "hidden focus"; see
<a href="qwidget.html#q3">focusNextPrevChild</a>() for details.<p><strong>Warning:</strong> If you call setFocus() in a function which may itself be
called from <a href="qwidget.html#o1">focusOutEvent</a>() or <a href="qwidget.html#o0">focusInEvent</a>(), you may see infinite
recursion.
<p>See also:  <a href="qwidget.html#i1">hasFocus</a>(), <a href="qwidget.html#i3">clearFocus</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#i0">setFocusPolicy</a>() and <a href="qapplication.html#c6">QApplication::focusWidget</a>().
<h3 class="fn">void<a name="i0"></a>QWidget::setFocusPolicy(FocusPolicypolicy)</h3>
<p>Enables or disables the keyboard focus for the widget.
<p>The keyboard focus is initially disabled (i.e. <em>policy</em> ==
<code>QWidget::NoFocus).</code>
<p>You must enable keyboard focus for a widget if it processes keyboard
events. This is normally done from the widget's constructor.  For
instance, the <a href="qlineedit.html">QLineEdit</a> constructor calls
setFocusPolicy(<code>QWidget::StrongFocus).</code>
<p>The <em>policy</em> can be:
<ul>
<li> <code>QWidget::TabFocus,</code> the widget accepts focus by tabbing.
<li> <code>QWidget::ClickFocus,</code> the widget accepts focus by clicking.
<li> <code>QWidget::StrongFocus,</code> the widget accepts focus by both tabbing
and clicking.
<li> <code>QWidget::NoFocus,</code> the widget does not accept focus
</ul>
<p>As a special case to support applications not utilizing focus,
<a href="qwidget.html#a5">Top-level widgets</a> that have
NoFocus policy will receive focus events and
gain keyboard events.
<p>See also:  <a href="qwidget.html#h8">isFocusEnabled</a>(), <a href="qwidget.html#o0">focusInEvent</a>(), <a href="qwidget.html#o1">focusOutEvent</a>(), <a href="qwidget.html#n8">keyPressEvent</a>(), <a href="qwidget.html#n9">keyReleaseEvent</a>() and <a href="qwidget.html#a9">isEnabled</a>().
<p>Examples:
 <a href="table-table-cpp.html#setFocusPolicy">table/table.cpp</a>
 <a href="widgets-widgets-cpp.html#setFocusPolicy">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="i5"></a>QWidget::setFocusProxy(QWidget*w)</h3>
<p>Sets this widget's focus proxy to <em>w.</em>
<p>Some widgets, such as <a href="qcombobox.html">QComboBox</a>, can "have focus," but create a
child widget to actually handle the focus.  QComboBox, for example,
creates a <a href="qlineedit.html">QLineEdit</a>.
<p>setFocusProxy() sets the widget which will actually get focus when
"this widget" gets it.  If there is a focus proxy, <a href="qwidget.html#h9">focusPolicy</a>(),
<a href="qwidget.html#i0">setFocusPolicy</a>(), <a href="qwidget.html#i2">setFocus</a>() and <a href="qwidget.html#i1">hasFocus</a>() all operate on the focus
proxy.
<h3 class="fn">void<a name="f9"></a>QWidget::setFont(const<a href="qfont.html">QFont</a>&amp;font) <code>[virtual]</code></h3>
<p>Sets the font for the widget.
<p>The <a href="qwidget.html#g1">fontInfo</a>() function reports the actual font that is being used by the
widget.
<p>This code fragment sets a 12 point helvetica bold font:
<pre>    <a href="qfont.html">QFont</a> f("Helvetica", 12, QFont::Bold);
    setFont( f );
</pre>
<p>If <em><a href="qwidget.html#g2">fontPropagation</a>()</em> is <code>AllChildren</code> or <code>SameFont,</code> setFont()
calls setFont() for children of the object, or those with whom the
object shares the font, respectively.  The default for QWidget
is <em>NoChildren,</em> so setFont() will not change the children's fonts.
<p>See also:  <a href="qwidget.html#f8">font</a>(), <a href="qwidget.html#p3">fontChange</a>(), <a href="qwidget.html#g1">fontInfo</a>(), <a href="qwidget.html#g0">fontMetrics</a>() and <a href="qwidget.html#g3">setFontPropagation</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#setFont">grapher/grapher.cpp</a>
 <a href="xform-xform-cpp.html#setFont">xform/xform.cpp</a>
 <a href="widgets-widgets-cpp.html#setFont">widgets/widgets.cpp</a>
<p>Reimplemented in <a href="qmultilineedit.html#a7">QMultiLineEdit</a>, <a href="qpopupmenu.html#a6">QPopupMenu</a>, <a href="qlistview.html#e0">QListView</a>, <a href="qlineedit.html#b3">QLineEdit</a>, <a href="qtabdialog.html#a3">QTabDialog</a>, <a href="qcombobox.html#c2">QComboBox</a> and <a href="qlistbox.html#a2">QListBox</a>.
<h3 class="fn">void<a name="g3"></a>QWidget::setFontPropagation(PropagationModem)</h3>
<p>Sets the font propagation mode to <em>m.</em>
<p>if <em>m</em> is <code>NoChildren</code> (the default), <a href="qwidget.html#f9">setFont</a>() does not change
any children's fonts.  If it is <code>SameFont,</code> setFont() changes the
font of the children that have the exact same font as this widget
(see <a href="qfont.html#d1">QFont::isCopyOf()</a> for details).  If it is <code>AllChildren,</code>
setFont() changes the font of all children.
<p>See also:  <a href="qwidget.html#g2">fontPropagation</a>(), <a href="qwidget.html#f9">setFont</a>() and <a href="qwidget.html#g5">setPalettePropagation</a>().
<h3 class="fn">void<a name="l5"></a>QWidget::setGeometry(intx, inty, intw, inth) <code>[virtualslot]</code></h3>
<p>Sets the widget geometry to <em>w</em> by <em>h,</em> positioned at <em>x,y</em> in its
parent widget.
<p>A <a href="qwidget.html#o6">resize event</a> and a <a href="qwidget.html#o5">move
event</a> are generated immediately if the widget is visible. If the
widget is invisible, the events are generated when <a href="qwidget.html#k2">show</a>() is called.
<p>The size is adjusted if it is outside the <a href="qwidget.html#c6">minimum</a> or <a href="qwidget.html#c8">maximum</a> widget size.
<p>This function is virtual, and all other overloaded setGeometry()
implementations call it.<p><strong>Warning:</strong> If you call setGeometry() from <a href="qwidget.html#o6">resizeEvent</a>() or <a href="qwidget.html#o5">moveEvent</a>(),
you may see infinite recursion.
<p>See also:  <a href="qwidget.html#b4">geometry</a>(), <a href="qwidget.html#l1">move</a>(), <a href="qwidget.html#l3">resize</a>(), <a href="qwidget.html#o5">moveEvent</a>(), <a href="qwidget.html#o6">resizeEvent</a>(), <a href="qwidget.html#c3">minimumSize</a>() and <a href="qwidget.html#c4">maximumSize</a>().
<p>Examples:
 <a href="tictac-tictac-cpp.html#setGeometry">tictac/tictac.cpp</a>
 <a href="mainlyQt-editor-cpp.html#setGeometry">mainlyQt/editor.cpp</a>
 <a href="drawdemo-drawdemo-cpp.html#setGeometry">drawdemo/drawdemo.cpp</a>
 <a href="xform-xform-cpp.html#setGeometry">xform/xform.cpp</a>
 <a href="cursor-cursor-cpp.html#setGeometry">cursor/cursor.cpp</a>
 <a href="qmag-qmag-cpp.html#setGeometry">qmag/qmag.cpp</a>
<p>Reimplemented in <a href="qpushbutton.html#b4">QPushButton</a>, <a href="qsemimodal.html#a7">QSemiModal</a>, <a href="qxtwidget.html#a6">QXtWidget</a> and <a href="qdialog.html#a9">QDialog</a>.
<h3 class="fn">void<a name="l6"></a>QWidget::setGeometry(const<a href="qrect.html">QRect</a>&amp;) <code>[slot]</code></h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<h3 class="fn">void<a name="h3"></a>QWidget::setIcon(const<a href="qpixmap.html">QPixmap</a>&amp;pixmap) <code>[slot]</code></h3>
<p>Sets the window icon pixmap.
<p>See also:  <a href="qwidget.html#g9">icon</a>(), <a href="qwidget.html#h4">setIconText</a>() and <a href="qwidget.html#h2">setCaption</a>().
<h3 class="fn">void<a name="h4"></a>QWidget::setIconText(constchar*iconText) <code>[slot]</code></h3>
<p>Sets the text of the window's icon to <em>iconText.</em>
<p>See also:  <a href="qwidget.html#h0">iconText</a>(), <a href="qwidget.html#h3">setIcon</a>() and <a href="qwidget.html#h2">setCaption</a>().
<h3 class="fn">void<a name="d3"></a>QWidget::setMask(<a href="qbitmap.html">QBitmap</a>bitmap)</h3>
<p>Causes only the pixels of the widget for which <em>bitmap</em>
has a corresponding 1 bit
to be visible.  If the region includes pixels outside the
<a href="qwidget.html#c1">rect</a>() of the widget, window system controls in that area
may or may not be visible, depending on the platform.
<p>Note that this effect can be slow if the region is particularly
complex.
<p>See also:  setMask(const, <a href="qregion.html">QRegion</a>&) and <a href="qwidget.html#d5">clearMask</a>().
<h3 class="fn">void<a name="d4"></a>QWidget::setMask(const<a href="qregion.html">QRegion</a>&amp;region)</h3>
<p>Causes only the parts of the widget which overlap <em>region</em>
to be visible.  If the region includes pixels outside the
<a href="qwidget.html#c1">rect</a>() of the widget, window system controls in that area
may or may not be visible, depending on the platform.
<p>Note that this effect can be slow if the region is particularly
complex.
<p>See also:  <a href="qwidget.html#d3">setMask</a>(<a href="qbitmap.html">QBitmap</a>) and <a href="qwidget.html#d5">clearMask</a>().
<h3 class="fn">void<a name="d2"></a>QWidget::setMaximumHeight(inth)</h3>
<p>Sets the maximum height of the widget to <em>h</em> without changing the
width.  Provided for convenience.
<p>See also:  <a href="qwidget.html#l7">sizeHint</a>(), <a href="qwidget.html#c3">minimumSize</a>(), <a href="qwidget.html#c4">maximumSize</a>(), <a href="qwidget.html#d9">setFixedSize</a>() and more.
<h3 class="fn">void<a name="c8"></a>QWidget::setMaximumSize(intmaxw, intmaxh)</h3>
<p>Sets the maximum size of the widget to <em>w</em> by <em>h</em> pixels.
<p>The widget cannot be resized to a larger size than the maximum widget
size. The widget's size is forced to the maximum size if the current
size is greater.
<p>See also:  <a href="qwidget.html#c4">maximumSize</a>(), <a href="qwidget.html#c6">setMinimumSize</a>(), <a href="qwidget.html#d8">setSizeIncrement</a>(), <a href="qwidget.html#l3">resize</a>() and <a href="qwidget.html#b8">size</a>().
<p>Examples:
 <a href="life-life-cpp.html#setMaximumSize">life/life.cpp</a>
 <a href="biff-biff-cpp.html#setMaximumSize">biff/biff.cpp</a>
<h3 class="fn">void<a name="c7"></a>QWidget::setMaximumSize(const<a href="qsize.html">QSize</a>&amp;size)</h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<h3 class="fn">void<a name="d1"></a>QWidget::setMaximumWidth(intw)</h3>
<p>Sets the maximum width of the widget to <em>w</em> without changing the
height.  Provided for convenience.
<p>See also:  <a href="qwidget.html#l7">sizeHint</a>(), <a href="qwidget.html#c3">minimumSize</a>(), <a href="qwidget.html#c4">maximumSize</a>(), <a href="qwidget.html#d9">setFixedSize</a>() and more.
<h3 class="fn">void<a name="d0"></a>QWidget::setMinimumHeight(inth)</h3>
<p>Sets the minimum height of the widget to <em>h</em> without changing the
width.  Provided for convenience.
<p>See also:  <a href="qwidget.html#l7">sizeHint</a>(), <a href="qwidget.html#c3">minimumSize</a>(), <a href="qwidget.html#c4">maximumSize</a>(), <a href="qwidget.html#d9">setFixedSize</a>() and more.
<p>Examples:
 <a href="layout-layout-cpp.html#setMinimumHeight">layout/layout.cpp</a>
 <a href="widgets-widgets-cpp.html#setMinimumHeight">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="c6"></a>QWidget::setMinimumSize(intminw, intminh)</h3>
<p>Sets the minimum size of the widget to <em>w</em> by <em>h</em> pixels.
<p>The widget cannot be resized to a smaller size than the minimum widget
size. The widget's size is forced to the minimum size if the current
size is smaller.
<p>See also:  <a href="qwidget.html#c3">minimumSize</a>(), <a href="qwidget.html#c8">setMaximumSize</a>(), <a href="qwidget.html#d8">setSizeIncrement</a>(), <a href="qwidget.html#l3">resize</a>() and <a href="qwidget.html#b8">size</a>().
<p>Examples:
 <a href="life-life-cpp.html#setMinimumSize">life/life.cpp</a>
 <a href="tooltip-tooltip-cpp.html#setMinimumSize">tooltip/tooltip.cpp</a>
 <a href="menu-menu-cpp.html#setMinimumSize">menu/menu.cpp</a>
 <a href="pref-pref-cpp.html#setMinimumSize">pref/pref.cpp</a>
 <a href="layout-layout-cpp.html#setMinimumSize">layout/layout.cpp</a>
 <a href="qmag-qmag-cpp.html#setMinimumSize">qmag/qmag.cpp</a>
 <a href="biff-biff-cpp.html#setMinimumSize">biff/biff.cpp</a>
 <a href="widgets-widgets-cpp.html#setMinimumSize">widgets/widgets.cpp</a>
<h3 class="fn">void<a name="c5"></a>QWidget::setMinimumSize(const<a href="qsize.html">QSize</a>&amp;size)</h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<h3 class="fn">void<a name="c9"></a>QWidget::setMinimumWidth(intw)</h3>
<p>Sets the minimum width of the widget to <em>w</em> without changing the
height.  Provided for convenience.
<p>See also:  <a href="qwidget.html#l7">sizeHint</a>(), <a href="qwidget.html#c3">minimumSize</a>(), <a href="qwidget.html#c4">maximumSize</a>(), <a href="qwidget.html#d9">setFixedSize</a>() and more.
<h3 class="fn">void<a name="h5"></a>QWidget::setMouseTracking(boolenable) <code>[slot]</code></h3>
<p>Enables mouse tracking if <em>enable</em> is TRUE, or disables it if <em>enable</em>
is FALSE.
<p>If mouse tracking is disabled (default), this widget only receives
mouse move events when at least one mouse button is pressed down while
the mouse is being moved.
<p>If mouse tracking is enabled, this widget receives mouse move events
even if no buttons are pressed down.
<p>See also:  <a href="qwidget.html#h1">hasMouseTracking</a>(), <a href="qwidget.html#n7">mouseMoveEvent</a>() and <a href="qapplication.html#h9">QApplication::setGlobalMouseTracking</a>().
<p>Examples:
 <a href="qmag-qmag-cpp.html#setMouseTracking">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#setMouseTracking">showimg/showimg.cpp</a>
<h3 class="fn">void<a name="f7"></a>QWidget::setPalette(const<a href="qpalette.html">QPalette</a>&amp;p) <code>[virtual]</code></h3>
<p>Sets the widget palette to <em>p.</em> The widget background color is set to
<code><a href="qwidget.html#f5">colorGroup</a>().background()</code>.
<p>If <em><a href="qwidget.html#g4">palettePropagation</a>()</em> is <code>AllChildren</code> or <code>SamePalette,</code>
setPalette() calls setPalette() for children of the object, or those
with whom the object shares the palette, respectively.  The default
for QWidget is <em>NoChildren,</em> so setPalette() will not change the children's
palettes.
<p>See also:  <a href="qapplication.html#f8">QApplication::setPalette</a>(), <a href="qwidget.html#f6">palette</a>(), <a href="qwidget.html#p2">paletteChange</a>(), <a href="qwidget.html#f5">colorGroup</a>(), <a href="qwidget.html#f2">setBackgroundColor</a>() and <a href="qwidget.html#g5">setPalettePropagation</a>().
<p>Reimplemented in <a href="qtableview.html#a1">QTableView</a>, <a href="qlistview.html#e1">QListView</a>, <a href="qscrollbar.html#a8">QScrollBar</a>, <a href="qlineedit.html#b4">QLineEdit</a>, <a href="qcombobox.html#c1">QComboBox</a> and <a href="qslider.html#a7">QSlider</a>.
<h3 class="fn">void<a name="g5"></a>QWidget::setPalettePropagation(PropagationModem)</h3>
<p>Sets the palette propagation mode to <em>m.</em>
<p>if <em>m</em> is <code>NoChildren</code> (the default), <a href="qwidget.html#f7">setPalette</a>() does not change
any children's palettes.  If it is <code>SamePalette,</code> setPalette()
changes the palette of the children that have the exact same palette
as this widget (see <a href="qpalette.html#b5">QPalette::isCopyOf()</a> for details).  If it is
<code>AllChildren,</code> setPalette() changes the palette of all children.
<p>See also:  <a href="qwidget.html#g4">palettePropagation</a>(), <a href="qwidget.html#f7">setPalette</a>() and <a href="qwidget.html#g3">setFontPropagation</a>().
<h3 class="fn">void<a name="q6"></a>QWidget::setSizeGrip(boolsizegrip) <code>[protected]</code></h3>
<p>Informs the underlying window system that this widget is a size grip
(if sizegrip is TRUE). An example is the nifty decoration in the
bottom right corner of a <a href="qstatusbar.html">QStatusBar</a>.
<p>This function does yet nothing under Windows. Under X11, the window
manager has to support the QT_SIZEGRIP protocol.
<h3 class="fn">void<a name="d8"></a>QWidget::setSizeIncrement(intw, inth)</h3>
<p>Sets the size increment of the widget.  When the user resizes the
window, the size will move in steps of <em>w</em> pixels horizontally and
<em>h</em> pixels vertically.
<p>Note that while you can set the size increment for all widgets, it
has no effect except for top-level widgets.<p><strong>Warning:</strong> The size increment has no effect under Windows, and may be
disregarded by the window manager on X.
<p>See also:  <a href="qwidget.html#d6">sizeIncrement</a>(), <a href="qwidget.html#c6">setMinimumSize</a>(), <a href="qwidget.html#c8">setMaximumSize</a>(), <a href="qwidget.html#l3">resize</a>() and <a href="qwidget.html#b8">size</a>().
<h3 class="fn">void<a name="d7"></a>QWidget::setSizeIncrement(const<a href="qsize.html">QSize</a>&amp;)</h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<p>Examples:
 <a href="life-life-cpp.html#setSizeIncrement">life/life.cpp</a>
<h3 class="fn">void<a name="a4"></a>QWidget::setStyle(GUIStylestyle) <code>[virtual]</code></h3>
<p>Sets the GUI style for this widget.  The valid values are listed
in <a href="qwindowdefs-h.html">qwindowdefs.h</a>.
<p>See also:  <a href="qwidget.html#a3">style</a>(), <a href="qwidget.html#o8">styleChange</a>() and <a href="qapplication.html#f4">QApplication::setStyle</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#setStyle">grapher/grapher.cpp</a>
<p>Reimplemented in <a href="qlistview.html#d9">QListView</a>, <a href="qmessagebox.html#c0">QMessageBox</a> and <a href="qcombobox.html#d0">QComboBox</a>.
<h3 class="fn">void<a name="u1"></a>QWidget::setTabOrder(QWidget*first, QWidget*second) <code>[static]</code></h3>
<p>Moves the <em>second</em> widget around the ring of focus widgets
so that keyboard focus moves from <em>first</em> widget to <em>second</em>
widget when Tab is pressed.
<p>Note that since the tab order of the <em>second</em> widget is changed,
you should order a chain like this:
<p><pre>    setTabOrder(a, b ); // a to b
    setTabOrder(b, c ); // a to b to c
    setTabOrder(c, d ); // a to b to c to d
</pre>
<p>not like this:
<p><pre>    setTabOrder(c, d); // c to d
    setTabOrder(a, b); // a to b AND c to d
    setTabOrder(b, c); // a to b to c, but not c to d
</pre>
<p>If either <em>first</em> or <em>second</em> has a focus proxy, setTabOrder()
substitutes its/their proxies.
<p>See also:  <a href="qwidget.html#i0">setFocusPolicy</a>() and <a href="qwidget.html#i5">setFocusProxy</a>().
<h3 class="fn">void<a name="j5"></a>QWidget::setUpdatesEnabled(boolenable) <code>[slot]</code></h3>
<p>Enables widget updates if <em>enable</em> is TRUE, or disables widget updates
if <em>enable</em> is FALSE.
<p>Calling <a href="qwidget.html#j6">update</a>() and <a href="qwidget.html#k0">repaint</a>() has no effect if updates are disabled.
Paint events from the window system are processed as normally even if
updates are disabled.
<p>This function is normally used to disable updates for a short period of
time, for instance to avoid screen flicker during large changes.
<p>Example:
<pre>    setUpdatesEnabled( FALSE );
    bigVisualChanges();
    setUpdatesEnabled( TRUE );
    repaint();
</pre>
<p>See also:  <a href="qwidget.html#j4">isUpdatesEnabled</a>(), <a href="qwidget.html#j6">update</a>(), <a href="qwidget.html#k0">repaint</a>() and <a href="qwidget.html#o4">paintEvent</a>().
<h3 class="fn">void<a name="p9"></a>QWidget::setWFlags(WFlagsf) <code>[protected]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="k2"></a>QWidget::show() <code>[virtualslot]</code></h3>
<p>Shows the widget and its child widgets.
<p>If its size or position has changed, Qt guarantees that a widget gets
move and resize events just before the widget is shown.
<p>See also:  <a href="qwidget.html#k3">hide</a>(), <a href="qwidget.html#k4">iconify</a>() and <a href="qwidget.html#k6">isVisible</a>().
<p>Examples:
 <a href="forever-forever-cpp.html#show">forever/forever.cpp</a>
 <a href="connect-connect-cpp.html#show">connect/connect.cpp</a>
 <a href="mainlyQt-editor-cpp.html#show">mainlyQt/editor.cpp</a>
 <a href="drawdemo-drawdemo-cpp.html#show">drawdemo/drawdemo.cpp</a>
 <a href="movies-main-cpp.html#show">movies/main.cpp</a>
 <a href="picture-picture-cpp.html#show">picture/picture.cpp</a>
 <a href="xform-xform-cpp.html#show">xform/xform.cpp</a>
 <a href="menu-menu-cpp.html#show">menu/menu.cpp</a>
 <a href="pref-pref-cpp.html#show">pref/pref.cpp</a>
 <a href="progress-progress-cpp.html#show">progress/progress.cpp</a>
 <a href="cursor-cursor-cpp.html#show">cursor/cursor.cpp</a>
 <a href="layout-layout-cpp.html#show">layout/layout.cpp</a>
 <a href="qmag-qmag-cpp.html#show">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#show">showimg/showimg.cpp</a>
 <a href="widgets-widgets-cpp.html#show">widgets/widgets.cpp</a>
<p>Reimplemented in <a href="qtableview.html#a2">QTableView</a>, <a href="qtabbar.html#a4">QTabBar</a>, <a href="qtoolbar.html#a7">QToolBar</a>, <a href="qsemimodal.html#a2">QSemiModal</a>, <a href="qlistview.html#b6">QListView</a>, <a href="qpopupmenu.html#a7">QPopupMenu</a>, <a href="qdialog.html#a4">QDialog</a>, <a href="qmainwindow.html#b1">QMainWindow</a>, <a href="qscrollview.html#c7">QScrollView</a>, <a href="qmenubar.html#a3">QMenuBar</a>, <a href="qtabdialog.html#a2">QTabDialog</a> and <a href="qwidgetstack.html#a4">QWidgetStack</a>.
<h3 class="fn"><a href="qsize.html">QSize</a><a name="b8"></a>QWidget::size()const</h3>
<p>Returns the size of the widget, excluding the window frame.
<p>See also:  <a href="qwidget.html#b4">geometry</a>(), <a href="qwidget.html#b9">width</a>() and <a href="qwidget.html#c0">height</a>().
<h3 class="fn"><a href="qsize.html">QSize</a><a name="l7"></a>QWidget::sizeHint()const <code>[virtual]</code></h3>
<p>Returns a recommended size for the widget, or an invalid size if
no size is recommended.
<p>The default implementation returns an invalid size.
<p>See also:  <a href="qsize.html#a4">QSize::isValid</a>(), <a href="qwidget.html#l3">resize</a>() and <a href="qwidget.html#c6">setMinimumSize</a>().
<p>Examples:
 <a href="widgets-widgets-cpp.html#sizeHint">widgets/widgets.cpp</a>
<p>Reimplemented in <a href="qtoolbutton.html#a4">QToolButton</a>, <a href="qpushbutton.html#a9">QPushButton</a>, <a href="qspinbox.html#b2">QSpinBox</a>, <a href="qlistbox.html#f0">QListBox</a>, <a href="qtabbar.html#a8">QTabBar</a>, <a href="qheader.html#b9">QHeader</a>, <a href="qlcdnumber.html#b4">QLCDNumber</a>, <a href="qlistview.html#e3">QListView</a>, <a href="qscrollbar.html#a9">QScrollBar</a>, <a href="qlineedit.html#b1">QLineEdit</a>, <a href="qcheckbox.html#a4">QCheckBox</a>, <a href="qprogressdialog.html#a9">QProgressDialog</a>, <a href="qradiobutton.html#a4">QRadioButton</a>, <a href="qlabel.html#b3">QLabel</a>, <a href="qcombobox.html#b9">QComboBox</a>, <a href="qslider.html#a9">QSlider</a> and <a href="qprogressbar.html#a4">QProgressBar</a>.
<h3 class="fn"><a href="qsize.html">QSize</a><a name="d6"></a>QWidget::sizeIncrement()const</h3>
<p>Returns the widget size increment.
<p>See also:  <a href="qwidget.html#d8">setSizeIncrement</a>(), <a href="qwidget.html#c3">minimumSize</a>() and <a href="qwidget.html#c4">maximumSize</a>().
<h3 class="fn">GUIStyle<a name="a3"></a>QWidget::style()const</h3>
<p>Returns the GUI style for this widget.
<p>See also:  <a href="qwidget.html#a4">setStyle</a>() and <a href="qapplication.html#f3">QApplication::style</a>().
<h3 class="fn">void<a name="o8"></a>QWidget::styleChange(GUIStyleoldStyle) <code>[virtualprotected]</code></h3>
<p>This virtual function is called from <a href="qwidget.html#a4">setStyle</a>().  <em>oldStyle</em> is the
previous style; you can get the new style from <a href="qwidget.html#a3">style</a>().
<p>Reimplement this function if your widget needs to know when its GUI
style changes.  You will almost certainly need to update the widget
using either <a href="qwidget.html#k0">repaint</a>(TRUE) or <a href="qwidget.html#j6">update</a>().
<p>The default implementation calls update().
<p>See also:  <a href="qwidget.html#a4">setStyle</a>(), <a href="qwidget.html#a3">style</a>(), <a href="qwidget.html#k0">repaint</a>() and <a href="qwidget.html#j6">update</a>().
<p>Reimplemented in <a href="qspinbox.html#d5">QSpinBox</a>, <a href="qprogressdialog.html#c0">QProgressDialog</a> and <a href="qtabdialog.html#c0">QTabDialog</a>.
<h3 class="fn">bool<a name="n0"></a>QWidget::testWFlags(WFlagsn)const</h3>
<p>Returns non-zero if any of the widget flags in <em>n</em> are set. The
widget flags are listed in <a href="qwindowdefs-h.html">qwindowdefs.h</a>, and are strictly for
internal use.
<h3 class="fn">QWidget*<a name="e7"></a>QWidget::topLevelWidget()const</h3>
<p>Returns the top-level widget for this widget.
<p>A top-level widget is an overlapping widget. It usually has no parent.
Modal <a href="qdialog.html">dialog widgets</a> are the only top-level
widgets that can have parent widgets.
<p>See also:  <a href="qwidget.html#a5">isTopLevel</a>().
<h3 class="fn">void<a name="j6"></a>QWidget::update() <code>[slot]</code></h3>
<p>Updates the widget unless updates are disabled or the widget is hidden.
<p>Updating the widget will erase the widget contents and generate a paint
event from the window system. The paint event is processed after the
program has returned to the main event loop.
<p>See also:  <a href="qwidget.html#k0">repaint</a>(), <a href="qwidget.html#o4">paintEvent</a>(), <a href="qwidget.html#j5">setUpdatesEnabled</a>() and <a href="qwidget.html#m1">erase</a>().
<p>Examples:
 <a href="desktop-desktop-cpp.html#update">desktop/desktop.cpp</a>
 <a href="connect-connect-cpp.html#update">connect/connect.cpp</a>
 <a href="picture-picture-cpp.html#update">picture/picture.cpp</a>
 <a href="aclock-aclock-cpp.html#update">aclock/aclock.cpp</a>
 <a href="showimg-showimg-cpp.html#update">showimg/showimg.cpp</a>
<h3 class="fn">void<a name="j7"></a>QWidget::update(intx, inty, intw, inth) <code>[slot]</code></h3>
<p>Updates a rectangle (<em>x, y, w, h)</em> inside the widget
unless updates are disabled or the widget is hidden.
<p>Updating the widget erases the widget area <em>(x,y,w,h),</em> which in turn
generates a paint event from the window system. The paint event is
processed after the program has returned to the main event loop.
<p>If <em>w</em> is negative, it is replaced with <code><a href="qwidget.html#b9">width</a>() - x</code>.
If <em>h</em> is negative, it is replaced width <code><a href="qwidget.html#c0">height</a>() - y</code>.
<p>See also:  <a href="qwidget.html#k0">repaint</a>(), <a href="qwidget.html#o4">paintEvent</a>(), <a href="qwidget.html#j5">setUpdatesEnabled</a>() and <a href="qwidget.html#m1">erase</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#update">grapher/grapher.cpp</a>
 <a href="drawdemo-drawdemo-cpp.html#update">drawdemo/drawdemo.cpp</a>
<h3 class="fn">void<a name="j8"></a>QWidget::update(const<a href="qrect.html">QRect</a>&amp;r) <code>[slot]</code></h3>
<p>This is an overloaded member function, provided for convenience.  It differs from the above function only in what argument(s) it accepts.
<h3 class="fn">int<a name="b9"></a>QWidget::width()const</h3>
<p>Returns the width of the widget, excluding the window frame.
<p>See also:  <a href="qwidget.html#b4">geometry</a>(), <a href="qwidget.html#c0">height</a>() and <a href="qwidget.html#b8">size</a>().
<p>Examples:
 <a href="grapher-grapher-cpp.html#width">grapher/grapher.cpp</a>
 <a href="tooltip-tooltip-cpp.html#width">tooltip/tooltip.cpp</a>
 <a href="drawdemo-drawdemo-cpp.html#width">drawdemo/drawdemo.cpp</a>
 <a href="xform-xform-cpp.html#width">xform/xform.cpp</a>
 <a href="aclock-aclock-cpp.html#width">aclock/aclock.cpp</a>
 <a href="menu-menu-cpp.html#width">menu/menu.cpp</a>
 <a href="pref-pref-cpp.html#width">pref/pref.cpp</a>
 <a href="qmag-qmag-cpp.html#width">qmag/qmag.cpp</a>
 <a href="showimg-showimg-cpp.html#width">showimg/showimg.cpp</a>
<h3 class="fn">WId<a name="a2"></a>QWidget::winId()const</h3>
<p>Returns the window system identifier of the widget.
<p>Portable in principle, but if you use it you are probably about to do
something non-portable. Be careful.
<p>See also:  <a href="qwidget.html#t9">find</a>().
<h3 class="fn">QWidgetMapper*<a name="u0"></a>QWidget::wmapper() <code>[static]</code></h3>
<p>For internal use only.
<h3 class="fn">int<a name="b5"></a>QWidget::x()const</h3>
<p>Returns the x coordinate of the widget, relative to its parent
widget and including the window frame.
<p>See also:  <a href="qwidget.html#b3">frameGeometry</a>(), <a href="qwidget.html#b6">y</a>() and <a href="qwidget.html#b7">pos</a>().
<h3 class="fn">int<a name="b6"></a>QWidget::y()const</h3>
<p>Returns the y coordinate of the widget, relative to its parent
widget and including the window frame.
<p>See also:  <a href="qwidget.html#b3">frameGeometry</a>(), <a href="qwidget.html#b5">x</a>() and <a href="qwidget.html#b7">pos</a>().
<p>Examples:
 <a href="drawdemo-drawdemo-cpp.html#y">drawdemo/drawdemo.cpp</a>
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It was generated from the following files:
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<li>qwidget.cpp: 1999/01/27
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