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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<h1 align=center>QScrollView Class Reference</h1><br clear="all">
<p>
The QScrollView widget provides a scrolling area with on-demand scrollbars.
<a href="#details">More...</a>
<p>
<code>#include <<a href="qscrollview-h.html">qscrollview.h</a>></code>
<p>
Inherits <a href="qframe.html">QFrame</a>.
<p>Inherited by <a href="qcanvasview.html">QCanvasView</a>, <a href="qiconview.html">QIconView</a>, <a href="qlistbox.html">QListBox</a>, <a href="qlistview.html">QListView</a>, <a href="qtable.html">QTable</a> and <a href="qtextview.html">QTextView</a>.
<p><a href="qscrollview-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><div class="fn"><a href="#dc5598"><b>QScrollView</b></a>(QWidget*parent=0, constchar*name=0, WFlagsf=0)</div>
<li><div class="fn"><a href="#13f41e"><b>~QScrollView</b></a>()</div>
<li><div class="fn">enum<a href="#ResizePolicy"><b>ResizePolicy</b></a>{Default, Manual, AutoOne, AutoOneFit}</div>
<li><div class="fn">virtualvoid<a href="#fd1206"><b>setResizePolicy</b></a>(ResizePolicy)</div>
<li><div class="fn">ResizePolicy<a href="#367ad3"><b>resizePolicy</b></a>()const</div>
<li><div class="fn">void<a href="#06c836"><b>removeChild</b></a>(QWidget*child)</div>
<li><div class="fn">virtualvoid<a href="#e4d759"><b>addChild</b></a>(QWidget*child, intx=0, inty=0)</div>
<li><div class="fn">virtualvoid<a href="#aee5e9"><b>moveChild</b></a>(QWidget*child, intx, inty)</div>
<li><div class="fn">int<a href="#b6c4fa"><b>childX</b></a>(QWidget*child)</div>
<li><div class="fn">int<a href="#53beb5"><b>childY</b></a>(QWidget*child)</div>
<li><div class="fn">boolchildIsVisible(QWidget*child)<em>(obsolete)</em></div>
<li><div class="fn">voidshowChild(QWidget*child, boolyes=TRUE)<em>(obsolete)</em></div>
<li><div class="fn">enum<a href="#ScrollBarMode"><b>ScrollBarMode</b></a>{Auto, AlwaysOff, AlwaysOn}</div>
<li><div class="fn">ScrollBarMode<a href="#8c5241"><b>vScrollBarMode</b></a>()const</div>
<li><div class="fn">virtualvoid<a href="#cdec7e"><b>setVScrollBarMode</b></a>(ScrollBarMode)</div>
<li><div class="fn">ScrollBarMode<a href="#6add94"><b>hScrollBarMode</b></a>()const</div>
<li><div class="fn">virtualvoid<a href="#d1b7ae"><b>setHScrollBarMode</b></a>(ScrollBarMode)</div>
<li><div class="fn">QWidget*<a href="#2c699f"><b>cornerWidget</b></a>()const</div>
<li><div class="fn">virtualvoid<a href="#54521e"><b>setCornerWidget</b></a>(QWidget*)</div>
<li><div class="fn">QScrollBar*<a href="#240999"><b>horizontalScrollBar</b></a>()const</div>
<li><div class="fn">QScrollBar*<a href="#e173fa"><b>verticalScrollBar</b></a>()const</div>
<li><div class="fn">QWidget*<a href="#040cb5"><b>viewport</b></a>()const</div>
<li><div class="fn">QWidget*<a href="#4aad2e"><b>clipper</b></a>()const</div>
<li><div class="fn">int<a href="#0f2055"><b>visibleWidth</b></a>()const</div>
<li><div class="fn">int<a href="#0d27c5"><b>visibleHeight</b></a>()const</div>
<li><div class="fn">int<a href="#97d58f"><b>contentsWidth</b></a>()const</div>
<li><div class="fn">int<a href="#c8c152"><b>contentsHeight</b></a>()const</div>
<li><div class="fn">int<a href="#d83f9b"><b>contentsX</b></a>()const</div>
<li><div class="fn">int<a href="#abff81"><b>contentsY</b></a>()const</div>
<li><div class="fn">void<a href="#88b69e"><b>updateContents</b></a>(intx, inty, intw, inth)</div>
<li><div class="fn">void<a href="#76af29"><b>updateContents</b></a>(constQRect&r)</div>
<li><div class="fn">void<a href="#f9c109"><b>repaintContents</b></a>(intx, inty, intw, inth, boolerase=TRUE)</div>
<li><div class="fn">void<a href="#fa476c"><b>repaintContents</b></a>(constQRect&r, boolerase=TRUE)</div>
<li><div class="fn">void<a href="#9ae18e"><b>contentsToViewport</b></a>(intx, inty, int&vx, int&vy)</div>
<li><div class="fn">void<a href="#7826a5"><b>viewportToContents</b></a>(intvx, intvy, int&x, int&y)</div>
<li><div class="fn">QPoint<a href="#6c80df"><b>contentsToViewport</b></a>(constQPoint&)</div>
<li><div class="fn">QPoint<a href="#0eca58"><b>viewportToContents</b></a>(constQPoint&)</div>
<li><div class="fn">void<a href="#55a330"><b>enableClipper</b></a>(booly)</div>
<li><div class="fn">void<a href="#0bb84a"><b>setStaticBackground</b></a>(booly)</div>
<li><div class="fn">bool<a href="#964065"><b>hasStaticBackground</b></a>()const</div>
<li><div class="fn">QSize<a href="#99eab2"><b>viewportSize</b></a>(int, int)const</div>
<li><div class="fn">void<a href="#87a490"><b>setDragAutoScroll</b></a>(boolb)</div>
<li><div class="fn">bool<a href="#f23de6"><b>dragAutoScroll</b></a>()const</div>
</ul>
<h2>Public Slots</h2>
<ul>
<li><div class="fn">virtualvoid<a href="#e4cb2e"><b>resizeContents</b></a>(intw, inth)</div>
<li><div class="fn">void<a href="#df01c2"><b>scrollBy</b></a>(intdx, intdy)</div>
<li><div class="fn">virtualvoid<a href="#332857"><b>setContentsPos</b></a>(intx, inty)</div>
<li><div class="fn">void<a href="#4e576a"><b>ensureVisible</b></a>(intx, inty)</div>
<li><div class="fn">void<a href="#7cd19b"><b>ensureVisible</b></a>(intx, inty, intxmargin, intymargin)</div>
<li><div class="fn">void<a href="#a62cda"><b>center</b></a>(intx, inty)</div>
<li><div class="fn">void<a href="#d231e5"><b>center</b></a>(intx, inty, floatxmargin, floatymargin)</div>
<li><div class="fn">void<a href="#837fb5"><b>updateScrollBars</b></a>()</div>
</ul>
<h2>Signals</h2>
<ul>
<li><div class="fn">void<a href="#1d7e56"><b>contentsMoving</b></a>(intx, inty)</div>
</ul>
<h2>Protected Members</h2>
<ul>
<li><div class="fn">virtualbool<a href="#0ac2b8"><b>eventFilter</b></a>(QObject*, QEvent*e)</div>
<li><div class="fn">virtualvoid<a href="#d8d421"><b>contentsMousePressEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#0a15fd"><b>contentsMouseReleaseEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#63b198"><b>contentsMouseDoubleClickEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#1179d3"><b>contentsMouseMoveEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#15f7c4"><b>contentsDragEnterEvent</b></a>(QDragEnterEvent*)</div>
<li><div class="fn">virtualvoid<a href="#f36e18"><b>contentsDragMoveEvent</b></a>(QDragMoveEvent*)</div>
<li><div class="fn">virtualvoid<a href="#f441af"><b>contentsDragLeaveEvent</b></a>(QDragLeaveEvent*)</div>
<li><div class="fn">virtualvoid<a href="#a15b24"><b>contentsDropEvent</b></a>(QDropEvent*)</div>
<li><div class="fn">virtualvoid<a href="#7b7a84"><b>contentsWheelEvent</b></a>(QWheelEvent*)</div>
<li><div class="fn">virtualvoid<a href="#94feb6"><b>viewportPaintEvent</b></a>(QPaintEvent*)</div>
<li><div class="fn">virtualvoid<a href="#5aaf73"><b>viewportResizeEvent</b></a>(QResizeEvent*)</div>
<li><div class="fn">virtualvoid<a href="#527711"><b>viewportMousePressEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#ec8fd5"><b>viewportMouseReleaseEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#7c4315"><b>viewportMouseDoubleClickEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#e364ff"><b>viewportMouseMoveEvent</b></a>(QMouseEvent*)</div>
<li><div class="fn">virtualvoid<a href="#315365"><b>viewportDragEnterEvent</b></a>(QDragEnterEvent*)</div>
<li><div class="fn">virtualvoid<a href="#efa5ed"><b>viewportDragMoveEvent</b></a>(QDragMoveEvent*)</div>
<li><div class="fn">virtualvoid<a href="#c44034"><b>viewportDragLeaveEvent</b></a>(QDragLeaveEvent*)</div>
<li><div class="fn">virtualvoid<a href="#ba9dcd"><b>viewportDropEvent</b></a>(QDropEvent*)</div>
<li><div class="fn">virtualvoid<a href="#a7f69e"><b>viewportWheelEvent</b></a>(QWheelEvent*)</div>
<li><div class="fn">virtualvoid<a href="#cafa5d"><b>drawContentsOffset</b></a>(QPainter*, intox, intoy, intcx, intcy, intcw, intch)</div>
<li><div class="fn">virtualvoid<a href="#310baa"><b>drawContents</b></a>(QPainter*, intcx, intcy, intcw, intch)</div>
<li><div class="fn">virtualvoid<a href="#3a0368"><b>setMargins</b></a>(intleft, inttop, intright, intbottom)</div>
<li><div class="fn">int<a href="#73d03d"><b>leftMargin</b></a>()const</div>
<li><div class="fn">int<a href="#24b1e7"><b>topMargin</b></a>()const</div>
<li><div class="fn">int<a href="#10b798"><b>rightMargin</b></a>()const</div>
<li><div class="fn">int<a href="#f95706"><b>bottomMargin</b></a>()const</div>
<li><div class="fn">virtualvoid<a href="#d385f5"><b>setHBarGeometry</b></a>(QScrollBar&hbar, intx, inty, intw, inth)</div>
<li><div class="fn">virtualvoid<a href="#8c159c"><b>setVBarGeometry</b></a>(QScrollBar&vbar, intx, inty, intw, inth)</div>
</ul>
<h2>Properties</h2>
<table border=1 cellpadding=3 cellspacing=0>
<tr><th>Type<th>Name<th>READ<th>WRITE<th>Options
<tr><td>ResizePolicy<td>resizePolicy<td>resizePolicy<td>setResizePolicy<td>
<tr><td>ScrollBarMode<td>vScrollBarMode<td>vScrollBarMode<td>setVScrollBarMode<td>
<tr><td>ScrollBarMode<td>hScrollBarMode<td>hScrollBarMode<td>setHScrollBarMode<td>
<tr><td>int<td>visibleWidth<td>visibleWidth<td> <td>
<tr><td>int<td>visibleHeight<td>visibleHeight<td> <td>
<tr><td>int<td>contentsWidth<td>contentsWidth<td> <td>
<tr><td>int<td>contentsHeight<td>contentsHeight<td> <td>
<tr><td>int<td>contentsX<td>contentsX<td> <td>
<tr><td>int<td>contentsY<td>contentsY<td> <td>
<tr><td>bool<td>dragAutoScroll<td>dragAutoScroll<td>setDragAutoScroll<td>
</table>
<hr><h2><a name="details"></a>Detailed Description</h2>
The QScrollView widget provides a scrolling area with on-demand scrollbars.
<p>
The QScrollView is a large canvas - potentially larger than the
coordinate system normally supported by the underlying window system.
This is important, as is is quite easy to go beyond such limitations
(eg. many web pages are more than 32000 pixels high). Additionally,
the QScrollView can have QWidgets positioned on it that scroll around
with the drawn content. These subwidgets can also have positions
outside the normal coordinate range (but they are still limited in
size).
<p>To provide content for the widget, inherit from QScrollView and
reimplement <a href="#310baa">drawContents</a>(), and use <a href="#e4cb2e">resizeContents</a>() to set the size
of the viewed area. Use <a href="#e4d759">addChild</a>() / <a href="#aee5e9">moveChild</a>() to position widgets
on the view.
<p>To use QScrollView effectively, it is important to understand its
widget structure in the three styles of usage: a single large child widget,
a large panning area with some widgets, a large panning area with many widgets.
<p><dl>
<dt><b>One Big Widget</b>
<dd>
<p><img src=qscrollview-vp2.png>
<p>The first, simplest usage of QScrollView depicted above is
appropriate for scrolling areas
which are <em>never</em> more than about 4000 pixels in either dimension (this
is about the maximum reliable size on X11 servers). In this usage, you
just make one large child in the QScrollView. The child should
be a child of the <a href="#040cb5">viewport</a>() of the scrollview, and be added with addChild():
<pre> <a href="qscrollview.html">QScrollView</a>* sv = new <a href="qscrollview.html">QScrollView</a>(...);
<a href="qvbox.html">QVBox</a>* big_box = new <a href="qvbox.html">QVBox</a>(sv-><a href="#040cb5">viewport</a>());
sv-><a href="#e4d759">addChild</a>(big_box);
</pre>
<p>You may go on to add arbitrary child widgets to the single child in
the scrollview, as you would with any widget:
<pre> <a href="qlabel.html">QLabel</a>* child1 = new <a href="qlabel.html">QLabel</a>("CHILD", big_box);
<a href="qlabel.html">QLabel</a>* child2 = new <a href="qlabel.html">QLabel</a>("CHILD", big_box);
<a href="qlabel.html">QLabel</a>* child3 = new <a href="qlabel.html">QLabel</a>("CHILD", big_box);
...
</pre>
<p>Here, the QScrollView has 4 children - the viewport(),
the <a href="#e173fa">verticalScrollBar</a>(), the <a href="#240999">horizontalScrollBar</a>(), and
a small <a href="#2c699f">cornerWidget</a>(). The viewport() has 1 child, the big <a href="qvbox.html">QVBox</a>.
The QVBox has the three labels as child widgets. When the view is scrolled,
the QVBox is moved, and its children move with it as child widgets normally
do.
<p><dt><b>Very Big View, some Widgets</b>
<dd>
<p><img src=qscrollview-vp.png>
<p>The second usage of QScrollView depicted above is appropriate when
few, if any, widgets are on a very large scrolling area that is
potentially larger than 4000 pixels in either dimension. In this
usage, you call resizeContents() to set the size of the area, and
reimplement drawContents() to paint the contents. You may also add
some widgets, by making them children of the viewport() and adding
them with addChild() (this is the same as the process for the single
large widget in the previous example): <pre> <a href="qscrollview.html">QScrollView</a>* sv = new <a href="qscrollview.html">QScrollView</a>(...);
<a href="qlabel.html">QLabel</a>* child1 = new <a href="qlabel.html">QLabel</a>("CHILD", sv-><a href="#040cb5">viewport</a>());
sv-><a href="#e4d759">addChild</a>(child1);
<a href="qlabel.html">QLabel</a>* child2 = new <a href="qlabel.html">QLabel</a>("CHILD", sv-><a href="#040cb5">viewport</a>());
sv-><a href="#e4d759">addChild</a>(child2);
<a href="qlabel.html">QLabel</a>* child3 = new <a href="qlabel.html">QLabel</a>("CHILD", sv-><a href="#040cb5">viewport</a>());
sv-><a href="#e4d759">addChild</a>(child3);
</pre>
<p>Here, the QScrollView has the same 4 children - the viewport(),
the verticalScrollBar(), the horizontalScrollBar(), and
a small cornerWidget(). The viewport()
has the three labels as child widgets. When the view is scrolled,
the scrollview moves the child widgets individually.
<p><dt><b>Very Big View, many Widgets</b>
<dd>
<p><img src=qscrollview-cl.png>
<p>The final usage of QScrollView depicted above is
appropriate when many widgets are on a very large scrolling area
that is potentially larger than 4000 pixels in either dimension. In this
usage, you call resizeContents() to set the size of the area, and reimplement
drawContents() to paint the contents. You then call <a href="#55a330">enableClipper</a>(TRUE)
and add widgets, again
by making them children of the viewport() and adding them with
addChild():
<pre> <a href="qscrollview.html">QScrollView</a>* sv = new <a href="qscrollview.html">QScrollView</a>(...);
sv-><a href="#55a330">enableClipper</a>(TRUE);
<a href="qlabel.html">QLabel</a>* child1 = new <a href="qlabel.html">QLabel</a>("CHILD", sv-><a href="#040cb5">viewport</a>());
sv-><a href="#e4d759">addChild</a>(child1);
<a href="qlabel.html">QLabel</a>* child2 = new <a href="qlabel.html">QLabel</a>("CHILD", sv-><a href="#040cb5">viewport</a>());
sv-><a href="#e4d759">addChild</a>(child2);
<a href="qlabel.html">QLabel</a>* child3 = new <a href="qlabel.html">QLabel</a>("CHILD", sv-><a href="#040cb5">viewport</a>());
sv-><a href="#e4d759">addChild</a>(child3);
</pre>
<p>Here, the QScrollView has 4 children - the <a href="#4aad2e">clipper</a>() (<em>not</em> the
viewport() this time), the verticalScrollBar(), the
horizontalScrollBar(), and a small cornerWidget(). The clipper() has
1 child - the viewport(). The viewport() has the three labels as
child widgets. When the view is scrolled, the viewport() is moved,
and its children move with it as child widgets normally do.
<p></dl>
<p>Normally you will use the first or third method if you want any child
widgets in the view.
<p>Note that the widget you see in the scrolled area is the viewport()
widget, not the QScrollView itself. So, to turn mouse tracking on for
example, use viewport()-><a href="qwidget.html#eeb59b">setMouseTracking</a>(TRUE).
<p>To enable drag-and-drop, you would <a href="qwidget.html#e1c7b1">setAcceptDrops</a>(TRUE) on the
QScrollView (since drag-and-drop events propagate to the parent), but
to work out what logical position in the view, you would need to map
the drop co-ordinate from being relative to the QScrollView to being
relative to the contents - use the function <a href="#0eca58">viewportToContents</a>() for this.
<p>To handle mouse events on the scrolling area, subclass scrollview as
you would subclass other widgets, but rather than overriding
<a href="qwidget.html#fb611b">mousePressEvent</a>(), reimplement <a href="#527711">viewportMousePressEvent</a>() instead (if
you reimplement mousePressEvent() you'll only get called when part of the
QScrollView is clicked - and the only such part is the "corner" (if
you don't set a cornerWidget()) and the frame, everything else being
covered up by the viewport, clipper, or scrollbars.
<p>When you construct a QScrollView, some of the widget flags apply to the
viewport(), instead of being sent to the <a href="qwidget.html">QWidget</a> constructor for the
QScrollView. This applies to <code>WResizeNoErase, WNorthWestGravity, WRepaintNoErase</code> and <code>WPaintClever.</code> See <a href="qt.html#WidgetFlags">Qt::WidgetFlags</a> for
documentation about these flags. Here are some examples: <ul>
<li> An image manipulation widget would use <code>WResizeNoErase|WNorthWestGravity,</code> because the widget draws all pixels
itself and when the size increases, it only needs a paint event for
the new part, since the old part remains unchanged.
<li>A word processing widget might use <code>WResizeNoErase</code> and repaint
itself line by line to get a less flickery resizing. If the widget is
in a mode where no text justification can take place, it might use <code>WNorthWestGravity</code> too, so that it would only get a repaint for the
newly visible parts.
<li>A scrolling game widget where the background scrolls as the
characters move might use <code>WRepaintNoErase</code> (in addition to <code>WNorthWestGravity</code> and <code>WResizeNoErase)</code> so that the window system
background does not flash in and out during scrolling.
</ul><p><b>Warning:</b> WResizeNoErase is currently set by default, i.e. you always
have to clear the background manually in scrollview subclasses. This
will change in a future version of Qt, and we recommend specifying the
flag explicitly.
<p><img src=qscrollview-m.png> <img src=qscrollview-w.png>
<p>Examples:
<a href="scrollview-scrollview-cpp.html#QScrollView">scrollview/scrollview.cpp</a>
<hr><h2>Member Type Documentation</h2>
<h3 class="fn"><a name="ResizePolicy">QScrollView::ResizePolicy</a></h3>
This enum type is used to control QScrollView's reaction to resize
events. There are four possible settings:<ul>
<li> <code>Default</code> - QScrollView selects one of the other settings
automatically when it has to. In this version of Qt, QScrollView
changes to <code>Manual</code> if you resize the contents with
<a href="#e4cb2e">resizeContents</a>(), and to <code>AutoOne</code> if a child is added.
<li> <code>Manual</code> - the view stays the size set by resizeContents().
<li> <code>AutoOne</code> - if there is only child widget, the view stays
the size of that widget. Otherwise, the behaviour is undefined.
<li> <code>AutoOneFit</code> - if there is only one child widget the view stays
the size of that widget's <a href="#f01f2a">sizeHint</a>(). If the scrollview is resized bigger
than the child's sizeHint(), the child will be resized to fit.
If there is more than one child, the behaviour is undefined.
<p></ul>
<h3 class="fn"><a name="ScrollBarMode">QScrollView::ScrollBarMode</a></h3>
This enum type describes the various modes of QScrollView's scroll
bars. The defined modes are: <ul>
<li> <code>Auto</code> - QScrollView shows a scrollbar when the content is
too tall to fit and not else. This is the default.
<li> <code>AlwaysOff</code> - QScrollView never shows a scrollbar.
<li> <code>AlwaysOn</code> - QScrollView always shows a scrollbar.
<p></ul>
<p>(The modes for the horizontal and vertical scroll bars are independent.).
<p>Examples:
<a href="scrollview-scrollview-cpp.html#QScrollView::ScrollBarMode">scrollview/scrollview.cpp</a>
<hr><h2>Member Function Documentation</h2>
<h3 class="fn"><a name="dc5598"></a>QScrollView::QScrollView(<a href="qwidget.html">QWidget</a>*parent=0, constchar*name=0, WFlagsf=0)</h3>
<p>Constructs a QScrollView with a <em>parent,</em> a <em>name</em> and widget
flags <em>f.</em>
<p>The widget flags <code>WNorthWestGravity, WRepaintNoErase</code> and <code>WPaintClever</code> are propagated to the <a href="#040cb5">viewport</a>() widget. The other
widget flags are propagated to the parent constructor as usual.
<h3 class="fn"><a name="13f41e"></a>QScrollView::~QScrollView()</h3>
<p>Destructs the QScrollView. Any children added with <a href="#e4d759">addChild</a>()
will be destructed.
<h3 class="fn">void<a name="e4d759"></a>QScrollView::addChild(<a href="qwidget.html">QWidget</a>*child, intx=0, inty=0) <code>[virtual]</code></h3>
<p>Inserts <em>child</em> into the scrolled area positioned at (<em>x, y).</em>
The position defaults to (0,0). If the child is already in the view,
it is just moved.
<p>You may want to call <a href="#55a330">enableClipper</a>(TRUE) if you add a large number
of widgets.
<p>Examples:
<a href="scrollview-scrollview-cpp.html#addChild">scrollview/scrollview.cpp</a>
<h3 class="fn">int<a name="f95706"></a>QScrollView::bottomMargin()const <code>[protected]</code></h3>
<p>Returns the current bottom margin.
<p>See also <a href="#3a0368">setMargins</a>().
<h3 class="fn">void<a name="a62cda"></a>QScrollView::center(intx, inty) <code>[slot]</code></h3>
<p>Scrolls the content so that the point (x,y) is in the
center of visible area.
<h3 class="fn">void<a name="d231e5"></a>QScrollView::center(intx, inty, floatxmargin, floatymargin) <code>[slot]</code></h3>
<p>Scrolls the content so that the point (x,y) is visible,
with the given margins (as fractions of visible area).
<p>eg.
<ul>
<li>Margin 0.0 allows (x,y) to be on edge of visible area.
<li>Margin 0.5 ensures (x,y) is in middle 50% of visible area.
<li>Margin 1.0 ensures (x,y) is in the center of the visible area.
</ul>
<h3 class="fn">bool<a name="580567"></a>QScrollView::childIsVisible(<a href="qwidget.html">QWidget</a>*child)</h3>
<p><b>This function is obsolete.</b> It is provided to keep old source working, and will probably be removed in a future version of Qt. We strongly advise against using it in new code.<p>
<p>Returns TRUE if <em>child</em> is visible. This is equivalent
to child-><a href="qwidget.html#57d026">isVisible</a>().
<h3 class="fn">int<a name="b6c4fa"></a>QScrollView::childX(<a href="qwidget.html">QWidget</a>*child)</h3>
<p>Returns the X position of the given child widget.
Use this rather than <a href="qwidget.html#a8f5dd">QWidget::x</a>() for widgets added to the view.
<h3 class="fn">int<a name="53beb5"></a>QScrollView::childY(<a href="qwidget.html">QWidget</a>*child)</h3>
<p>Returns the Y position of the given child widget.
Use this rather than <a href="qwidget.html#043386">QWidget::y</a>() for widgets added to the view.
<h3 class="fn"><a href="qwidget.html">QWidget</a>*<a name="4aad2e"></a>QScrollView::clipper()const</h3>
<p>Returns the clipper widget.
Contents in the scrollview is ultimately clipped to be inside
the clipper widget.
<p>You should not need to access this.
<p>See also <a href="#0f2055">visibleWidth</a>() and <a href="#0d27c5">visibleHeight</a>().
<h3 class="fn">void<a name="15f7c4"></a>QScrollView::contentsDragEnterEvent(<a href="qdragenterevent.html">QDragEnterEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#1ddf8b">dragEnterEvent</a>() - the drag position is translated to be a
point on the contents.
<h3 class="fn">void<a name="f441af"></a>QScrollView::contentsDragLeaveEvent(<a href="qdragleaveevent.html">QDragLeaveEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#5db9c8">dragLeaveEvent</a>() - the drag position is translated to be a
point on the contents.
<h3 class="fn">void<a name="f36e18"></a>QScrollView::contentsDragMoveEvent(<a href="qdragmoveevent.html">QDragMoveEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#43e73b">dragMoveEvent</a>() - the drag position is translated to be a
point on the contents.
<h3 class="fn">void<a name="a15b24"></a>QScrollView::contentsDropEvent(<a href="qdropevent.html">QDropEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#db2a57">dropEvent</a>() - the drop position is translated to be a
point on the contents.
<h3 class="fn">int<a name="c8c152"></a>QScrollView::contentsHeight()const</h3>
<p>Returns the height of the contents area.
<h3 class="fn">void<a name="63b198"></a>QScrollView::contentsMouseDoubleClickEvent(<a href="qmouseevent.html">QMouseEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#3311d2">mouseDoubleClickEvent</a>() - the click position is translated to be a
point on the contents.
<p>Reimplemented in <a href="qtable.html#e486e7">QTable</a> and <a href="qlistview.html#64a113">QListView</a>.
<h3 class="fn">void<a name="1179d3"></a>QScrollView::contentsMouseMoveEvent(<a href="qmouseevent.html">QMouseEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#8b6935">mouseMoveEvent</a>() - the mouse position is translated to be a
point on the contents.
<p>Reimplemented in <a href="qlistview.html#18c8ce">QListView</a> and <a href="qtable.html#037469">QTable</a>.
<h3 class="fn">void<a name="d8d421"></a>QScrollView::contentsMousePressEvent(<a href="qmouseevent.html">QMouseEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#fb611b">mousePressEvent</a>() - the press position is translated to be a
point on the contents.
<p>Reimplemented in <a href="qlistview.html#0d6c15">QListView</a> and <a href="qtable.html#960bb2">QTable</a>.
<h3 class="fn">void<a name="0a15fd"></a>QScrollView::contentsMouseReleaseEvent(<a href="qmouseevent.html">QMouseEvent</a>*) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="qwidget.html#773a0f">mouseReleaseEvent</a>() - the release position is translated to be a
point on the contents.
<p>Reimplemented in <a href="qlistview.html#df1da2">QListView</a> and <a href="qtable.html#f15096">QTable</a>.
<h3 class="fn">void<a name="1d7e56"></a>QScrollView::contentsMoving(intx, inty) <code>[signal]</code></h3>
<p>This signal is emitted just before the contents is moved
to the given position.
<p>See also <a href="#d83f9b">contentsX</a>() and <a href="#abff81">contentsY</a>().
<h3 class="fn"><a href="qpoint.html">QPoint</a><a name="6c80df"></a>QScrollView::contentsToViewport(const<a href="qpoint.html">QPoint</a>&p)</h3>
<p>Returns the
point <em>p</em>
translated to
a point on the <a href="#040cb5">viewport</a>() widget.
<h3 class="fn">void<a name="9ae18e"></a>QScrollView::contentsToViewport(intx, inty, int&vx, int&vy)</h3>
<p>Translates
a point (<em>x, y)</em> in the contents
to
a point (<em>vx, vy)</em> on the <a href="#040cb5">viewport</a>() widget.
<h3 class="fn">void<a name="7b7a84"></a>QScrollView::contentsWheelEvent(<a href="qwheelevent.html">QWheelEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>This event handler is called whenever the QScrollView receives a
<a href="#88d073">wheelEvent</a>() - the mouse position is translated to be a
point on the contents.
<h3 class="fn">int<a name="97d58f"></a>QScrollView::contentsWidth()const</h3>
<p>Returns the width of the contents area.
<h3 class="fn">int<a name="d83f9b"></a>QScrollView::contentsX()const</h3>
<p>Returns the X coordinate of the contents which is at the left
edge of the viewport.
<h3 class="fn">int<a name="abff81"></a>QScrollView::contentsY()const</h3>
<p>Returns the Y coordinate of the contents which is at the top
edge of the viewport.
<h3 class="fn"><a href="qwidget.html">QWidget</a>*<a name="2c699f"></a>QScrollView::cornerWidget()const</h3>
<p>Returns the widget in the corner between the two scrollbars.
<p>By default, no corner widget is present.
<p>Examples:
<a href="scrollview-scrollview-cpp.html#cornerWidget">scrollview/scrollview.cpp</a>
<h3 class="fn">bool<a name="f23de6"></a>QScrollView::dragAutoScroll()const</h3>
<p>Returns TRUE if autoscrolling in drag move events is enabled, else
FALSE.
<p>See also <a href="#87a490">setDragAutoScroll</a>().
<h3 class="fn">void<a name="310baa"></a>QScrollView::drawContents(<a href="qpainter.html">QPainter</a>*p, intclipx, intclipy, intclipw, intcliph) <code>[virtualprotected]</code></h3>
<p>Reimplement this method if you are viewing a drawing area rather
than a widget.
<p>The function should draw the rectangle (<em>clipx, clipy, clipw, cliph</em> ) of the contents, using painter <em>p.</em> The clip rectangle is
in the scroll views's coordinates.
<p>For example:
<pre> {
// Fill a 40000 by 50000 rectangle at (100000,150000)
// Calculate the coordinates...
int x1 = 100000, y1 = 150000;
int x2 = x1+40000-1, y2 = y1+50000-1;
// Clip the coordinates so X/Windows will not have problems...
if (x1 < clipx) x1=clipx;
if (y1 < clipy) y1=clipy;
if (x2 > clipx+clipw-1) x2=clipx+clipw-1;
if (y2 > clipy+cliph-1) y2=clipy+cliph-1;
// Paint using the small coordinates...
if ( x2 >= x1 && y2 >= y1 )
p->fillRect(x1, y1, x2-x1+1, y2-y1+1, red);
}
</pre>
<p>The clip rectangle and translation of the painter <em>p</em> is already set
appropriately.
<p>Reimplemented in <a href="qcanvasview.html#19a02e">QCanvasView</a> and <a href="qtable.html#9a72a1">QTable</a>.
<h3 class="fn">void<a name="cafa5d"></a>QScrollView::drawContentsOffset(<a href="qpainter.html">QPainter</a>*p, intoffsetx, intoffsety, intclipx, intclipy, intclipw, intcliph) <code>[virtualprotected]</code></h3>
<p>For backward compatibility only.
It is easier to use <a href="#310baa">drawContents</a>(<a href="qpainter.html">QPainter</a>*,int,int,int,int).
<p>The default implementation translates the painter appropriately
and calls drawContents(QPainter*,int,int,int,int).
<p>Reimplemented in <a href="qlistview.html#d31af0">QListView</a> and <a href="qtextview.html#b94b72">QTextView</a>.
<h3 class="fn">void<a name="55a330"></a>QScrollView::enableClipper(booly)</h3>
<p>When large numbers of child widgets are in a scrollview, especially
if they are close together, the scrolling performance can suffer
greatly. If you call enableClipper(TRUE), the scrollview will
use an extra widget to group child widgets.
<p>Note that you may only call enableClipper() prior to adding widgets.
<p>For a full discussion, see the overview documentation of this
class.
<p>Examples:
<a href="scrollview-scrollview-cpp.html#enableClipper">scrollview/scrollview.cpp</a>
<h3 class="fn">void<a name="4e576a"></a>QScrollView::ensureVisible(intx, inty) <code>[slot]</code></h3>
<p>Scrolls the content so that the point (x, y) is visible
with at least 50-pixel margins (if possible, otherwise centered).
<h3 class="fn">void<a name="7cd19b"></a>QScrollView::ensureVisible(intx, inty, intxmargin, intymargin) <code>[slot]</code></h3>
<p>Scrolls the content so that the point (x, y) is visible
with at least the given pixel margins (if possible, otherwise centered).
<h3 class="fn">bool<a name="0ac2b8"></a>QScrollView::eventFilter(<a href="qobject.html">QObject</a>*obj, <a href="qevent.html">QEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>This event filter ensures the scrollbars are updated when a single
contents widget is resized, shown, hidden, or destroyed, and passes
mouse events to the QScrollView.
<p>Reimplemented from <a href="qobject.html#bb8547">QObject.</a>
<h3 class="fn">bool<a name="fe180c"></a>QScrollView::focusNextPrevChild(boolnext) <code>[virtualprotected]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#55dcde">QWidget.</a>
<h3 class="fn">void<a name="c67292"></a>QScrollView::frameChanged() <code>[virtualprotected]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qframe.html#595a12">QFrame.</a>
<h3 class="fn">QScrollView::ScrollBarMode<a name="6add94"></a>QScrollView::hScrollBarMode()const</h3>
<p>Returns the currently set mode for the horizontal scrollbar.
<p>See also <a href="#d1b7ae">setHScrollBarMode</a>().
<p>Examples:
<a href="scrollview-scrollview-cpp.html#hScrollBarMode">scrollview/scrollview.cpp</a>
<h3 class="fn">bool<a name="964065"></a>QScrollView::hasStaticBackground()const</h3>
<p>Returns wether QScrollView uses a static background.
<p>See also <a href="#0bb84a">setStaticBackground</a>().
<h3 class="fn"><a href="qscrollbar.html">QScrollBar</a>*<a name="240999"></a>QScrollView::horizontalScrollBar()const</h3>
<p>Returns the component horizontal scrollbar. It is made available to allow
accelerators, autoscrolling, etc., and to allow changing
of arrow scroll rates: bar->setSteps( rate, bar->pageStep() ).
<p>It should not be otherwise manipulated.
<p>This function never returns 0.
<h3 class="fn">int<a name="73d03d"></a>QScrollView::leftMargin()const <code>[protected]</code></h3>
<p>Returns the current left margin.
<p>See also <a href="#3a0368">setMargins</a>().
<h3 class="fn"><a href="qsize.html">QSize</a><a name="792145"></a>QScrollView::minimumSizeHint()const <code>[virtual]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#3f0fc2">QWidget.</a>
<h3 class="fn">void<a name="aee5e9"></a>QScrollView::moveChild(<a href="qwidget.html">QWidget</a>*child, intx, inty) <code>[virtual]</code></h3>
<p>Repositions <em>child</em> to (<em>x, y).</em>
This functions the same as <a href="#e4d759">addChild</a>().
<h3 class="fn">void<a name="cd32ca"></a>QScrollView::removeChild(<a href="qobject.html">QObject</a>*child) <code>[virtual]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qobject.html#eb9b06">QObject.</a>
<h3 class="fn">void<a name="06c836"></a>QScrollView::removeChild(<a href="qwidget.html">QWidget</a>*child)</h3>
<p>Removes a child from the scrolled area. Note that this happens
automatically if the child is deleted.
<h3 class="fn">void<a name="f9c109"></a>QScrollView::repaintContents(intx, inty, intw, inth, boolerase=TRUE)</h3>
<p>Calls <a href="qwidget.html#f084e3">repaint</a>() on rectangle defined by <em>x, y, w, h,</em>
translated appropriately. If the rectangle in not visible,
nothing is repainted.
<p>See also <a href="#88b69e">updateContents</a>().
<h3 class="fn">void<a name="fa476c"></a>QScrollView::repaintContents(const<a href="qrect.html">QRect</a>&r, boolerase=TRUE)</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="5d37af"></a>QScrollView::resize(const<a href="qsize.html">QSize</a>&s)</h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Examples:
<a href="iconview-main-cpp.html#resize">iconview/main.cpp</a>
<a href="dirview-main-cpp.html#resize">dirview/main.cpp</a>
<h3 class="fn">void<a name="c091ff"></a>QScrollView::resize(intw, inth)</h3>
<p>Reimplemented for internal reasons; the API is not affected.
<h3 class="fn">void<a name="e4cb2e"></a>QScrollView::resizeContents(intw, inth) <code>[virtualslot]</code></h3>
<p>Set the size of the contents area to <em>w</em> pixels wide and <em>h</em>
pixels high, and updates the viewport accordingly.
<h3 class="fn">void<a name="6894d2"></a>QScrollView::resizeEvent(<a href="qresizeevent.html">QResizeEvent</a>*event) <code>[virtualprotected]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#28c156">QWidget.</a>
<h3 class="fn">QScrollView::ResizePolicy<a name="367ad3"></a>QScrollView::resizePolicy()const</h3>
<p>Returns the currently set <a href="#ResizePolicy">ResizePolicy</a>.
<p>See also <a href="#fd1206">setResizePolicy</a>() and <a href="#ResizePolicy">ResizePolicy</a>.
<h3 class="fn">int<a name="10b798"></a>QScrollView::rightMargin()const <code>[protected]</code></h3>
<p>Returns the current right margin.
<p>See also <a href="#3a0368">setMargins</a>().
<h3 class="fn">void<a name="df01c2"></a>QScrollView::scrollBy(intdx, intdy) <code>[slot]</code></h3>
<p>Scrolls the content by <em>x</em> to the left and <em>y</em> upwards.
<h3 class="fn">void<a name="332857"></a>QScrollView::setContentsPos(intx, inty) <code>[virtualslot]</code></h3>
<p>Scrolls the content so that the point (x, y) is in the top-left corner.
<p>Reimplemented in <a href="qlistview.html#94018a">QListView</a>.
<h3 class="fn">void<a name="54521e"></a>QScrollView::setCornerWidget(<a href="qwidget.html">QWidget</a>*corner) <code>[virtual]</code></h3>
<p>Sets the widget in the corner between the two scrollbars.
<p>You will probably also want to
set at least one of the scrollbar modes to AlwaysOn.
<p>Passing 0 shows no widget in the corner.
<p>Any previous corner widget is hidden.
<p>You may call setCornerWidget() with the same widget at different times.
<p>All widgets set here will be deleted by the QScrollView when it destructs
unless you separately
reparent the widget after setting some other corner widget (or 0).
<p>Any <em>newly</em> set widget should have no current parent.
<p>By default, no corner widget is present.
<p>See also <a href="#cdec7e">setVScrollBarMode</a>() and <a href="#d1b7ae">setHScrollBarMode</a>().
<p>Examples:
<a href="scrollview-scrollview-cpp.html#setCornerWidget">scrollview/scrollview.cpp</a>
<h3 class="fn">void<a name="87a490"></a>QScrollView::setDragAutoScroll(boolb)</h3>
<p>If <em>b</em> is set to TRUE, the QScrollView automatically scrolls the contents
in drag move events if the user moves the cursor close to a border of the
view. This of course only works id the viewport accepts drops!
Specifying FALSE here disables this autoscroll feature.
<h3 class="fn">void<a name="528522"></a>QScrollView::setEnabled(boolenable) <code>[virtualslot]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#f996ef">QWidget.</a>
<h3 class="fn">void<a name="d385f5"></a>QScrollView::setHBarGeometry(<a href="qscrollbar.html">QScrollBar</a>&hbar, intx, inty, intw, inth) <code>[virtualprotected]</code></h3>
<p>Called when the horizontal scrollbar geometry changes. This is provided
as a protected function so that subclasses can do interesting things
like providing extra buttons in some of the space normally used by the
scrollbars.
<p>The default implementation simply gives all the space to <em>hbar.</em>
<p>See also <a href="#8c159c">setVBarGeometry</a>().
<h3 class="fn">void<a name="d1b7ae"></a>QScrollView::setHScrollBarMode(<a href="qscrollview.html#ScrollBarMode">ScrollBarMode</a>mode)</h3>
<p>Sets the mode for the horizontal scrollbar.
<ul>
<li> <code>Auto</code> (the default) shows a scrollbar when the content is too wide to fit.
<li> <code>AlwaysOff</code> never shows a scrollbar.
<li> <code>AlwaysOn</code> always shows a scrollbar.
</ul>
<p>See also <a href="#6add94">hScrollBarMode</a>() and <a href="#cdec7e">setVScrollBarMode</a>().
<p>Examples:
<a href="scrollview-scrollview-cpp.html#setHScrollBarMode">scrollview/scrollview.cpp</a>
<h3 class="fn">void<a name="3a0368"></a>QScrollView::setMargins(intleft, inttop, intright, intbottom) <code>[virtualprotected]</code></h3>
<p>Sets the margins around the scrolling area. This is useful for
applications such as spreadsheets with `locked' rows and columns.
The marginal space is <em>inside</em> the <a href="qframe.html#20879e">frameRect</a>() and is left blank -
reimplement <a href="#310baa">drawContents</a>() or put widgets in the unused area.
<p>By default all margins are zero.
<p>See also <a href="#c67292">frameChanged</a>().
<h3 class="fn">void<a name="fd1206"></a>QScrollView::setResizePolicy(<a href="qscrollview.html#ResizePolicy">ResizePolicy</a>r)</h3>
<p>Sets the resize policy to <em>r.</em>
<p>See also <a href="#367ad3">resizePolicy</a>() and <a href="#ResizePolicy">ResizePolicy</a>.
<h3 class="fn">void<a name="0bb84a"></a>QScrollView::setStaticBackground(booly)</h3>
<p>Sets the scrollview to have a static background if <em>y</em> is TRUE, or a scrolling background otherwise. By default,
the background is scrolling.
<p>Beware that this mode is quite slow, as a full repaint of the visible area has to be triggered on every contents move.
<p>See also <a href="#964065">hasStaticBackground</a>().
<h3 class="fn">void<a name="8c159c"></a>QScrollView::setVBarGeometry(<a href="qscrollbar.html">QScrollBar</a>&vbar, intx, inty, intw, inth) <code>[virtualprotected]</code></h3>
<p>Called when the vertical scrollbar geometry changes. This is provided
as a protected function so that subclasses can do interesting things
like providing extra buttons in some of the space normally used by the
scrollbars.
<p>The default implementation simply gives all the space to <em>vbar.</em>
<p>See also <a href="#d385f5">setHBarGeometry</a>().
<h3 class="fn">void<a name="cdec7e"></a>QScrollView::setVScrollBarMode(<a href="qscrollview.html#ScrollBarMode">ScrollBarMode</a>mode)</h3>
<p>Sets the mode for the vertical scrollbar.
<p>See also <a href="#8c5241">vScrollBarMode</a>() and <a href="#d1b7ae">setHScrollBarMode</a>().
<p>Examples:
<a href="scrollview-scrollview-cpp.html#setVScrollBarMode">scrollview/scrollview.cpp</a>
<h3 class="fn">void<a name="88277a"></a>QScrollView::show() <code>[virtual]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Examples:
<a href="iconview-main-cpp.html#show">iconview/main.cpp</a>
<p>Reimplemented from <a href="qwidget.html#ccc8f7">QWidget.</a>
<h3 class="fn">void<a name="5cb8e3"></a>QScrollView::showChild(<a href="qwidget.html">QWidget</a>*child, booly=TRUE)</h3>
<p><b>This function is obsolete.</b> It is provided to keep old source working, and will probably be removed in a future version of Qt. We strongly advise against using it in new code.<p>
<p>Sets the visibility of <em>child.</em> Equivalent to
<a href="qwidget.html#ccc8f7">QWidget::show</a>() or <a href="qwidget.html#bc7c6a">QWidget::hide</a>().
<h3 class="fn"><a href="qsize.html">QSize</a><a name="f01f2a"></a>QScrollView::sizeHint()const <code>[virtual]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#290bcd">QWidget.</a>
<h3 class="fn"><a href="qsizepolicy.html">QSizePolicy</a><a name="bd5724"></a>QScrollView::sizePolicy()const <code>[virtual]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#2d5d13">QWidget.</a>
<h3 class="fn">void<a name="e80272"></a>QScrollView::styleChange(<a href="qstyle.html">QStyle</a>&old) <code>[virtual]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#7a14f4">QWidget.</a>
<h3 class="fn">int<a name="24b1e7"></a>QScrollView::topMargin()const <code>[protected]</code></h3>
<p>Returns the current top margin.
<p>See also <a href="#3a0368">setMargins</a>().
<h3 class="fn">void<a name="88b69e"></a>QScrollView::updateContents(intx, inty, intw, inth)</h3>
<p>Calls <a href="qwidget.html#4a97ef">update</a>() on rectangle defined by <em>x, y, w, h,</em>
translated appropriately. If the rectangle in not visible,
nothing is repainted.
<p>See also <a href="#f9c109">repaintContents</a>().
<h3 class="fn">void<a name="76af29"></a>QScrollView::updateContents(const<a href="qrect.html">QRect</a>&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">void<a name="837fb5"></a>QScrollView::updateScrollBars() <code>[slot]</code></h3>
<p>Updates scrollbars - all possibilities considered. You should never
need to call this in your code.
<h3 class="fn">QScrollView::ScrollBarMode<a name="8c5241"></a>QScrollView::vScrollBarMode()const</h3>
<p>Returns the currently set mode for the vertical scrollbar.
<p>See also <a href="#cdec7e">setVScrollBarMode</a>().
<p>Examples:
<a href="scrollview-scrollview-cpp.html#vScrollBarMode">scrollview/scrollview.cpp</a>
<h3 class="fn"><a href="qscrollbar.html">QScrollBar</a>*<a name="e173fa"></a>QScrollView::verticalScrollBar()const</h3>
<p>Returns the component vertical scrollbar. It is made available to allow
accelerators, autoscrolling, etc., and to allow changing
of arrow scroll rates: bar->setSteps( rate, bar->pageStep() ).
<p>It should not be otherwise manipulated.
<p>This function never returns 0.
<h3 class="fn"><a href="qwidget.html">QWidget</a>*<a name="040cb5"></a>QScrollView::viewport()const</h3>
<p>Returns the viewport widget of the scrollview. This is the widget
containing the contents widget or which is the drawing area.
<p>Examples:
<a href="scrollview-scrollview-cpp.html#viewport">scrollview/scrollview.cpp</a>
<h3 class="fn">void<a name="315365"></a>QScrollView::viewportDragEnterEvent(<a href="qdragenterevent.html">QDragEnterEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all drag enter
events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#15f7c4">contentsDragEnterEvent</a>().
<p>See also <a href="qwidget.html#1ddf8b">QWidget::dragEnterEvent</a>().
<h3 class="fn">void<a name="c44034"></a>QScrollView::viewportDragLeaveEvent(<a href="qdragleaveevent.html">QDragLeaveEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all drag leave
events sent to the viewport.
<p>The default implementation calls <a href="#f441af">contentsDragLeaveEvent</a>().
<p>See also <a href="qwidget.html#5db9c8">QWidget::dragLeaveEvent</a>().
<h3 class="fn">void<a name="efa5ed"></a>QScrollView::viewportDragMoveEvent(<a href="qdragmoveevent.html">QDragMoveEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all drag move
events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#f36e18">contentsDragMoveEvent</a>().
<p>See also <a href="qwidget.html#43e73b">QWidget::dragMoveEvent</a>().
<h3 class="fn">void<a name="ba9dcd"></a>QScrollView::viewportDropEvent(<a href="qdropevent.html">QDropEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all drop
events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#a15b24">contentsDropEvent</a>().
<p>See also <a href="qwidget.html#db2a57">QWidget::dropEvent</a>().
<h3 class="fn">void<a name="7c4315"></a>QScrollView::viewportMouseDoubleClickEvent(<a href="qmouseevent.html">QMouseEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all mouse
double click events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#63b198">contentsMouseDoubleClickEvent</a>().
<p>See also <a href="qwidget.html#3311d2">QWidget::mouseDoubleClickEvent</a>().
<p>Reimplemented in <a href="qlistbox.html#8cf082">QListBox</a>.
<h3 class="fn">void<a name="e364ff"></a>QScrollView::viewportMouseMoveEvent(<a href="qmouseevent.html">QMouseEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all mouse
move events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#1179d3">contentsMouseMoveEvent</a>().
<p>See also <a href="qwidget.html#8b6935">QWidget::mouseMoveEvent</a>().
<p>Reimplemented in <a href="qtextview.html#e9e990">QTextView</a>, <a href="qtextbrowser.html#292351">QTextBrowser</a> and <a href="qlistbox.html#044158">QListBox</a>.
<h3 class="fn">void<a name="527711"></a>QScrollView::viewportMousePressEvent(<a href="qmouseevent.html">QMouseEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents, this method receives all mouse
press events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#d8d421">contentsMousePressEvent</a>().
<p>See also <a href="#d8d421">contentsMousePressEvent</a>() and <a href="qwidget.html#fb611b">QWidget::mousePressEvent</a>().
<p>Reimplemented in <a href="qtextview.html#626c81">QTextView</a>, <a href="qlistbox.html#dbc0d5">QListBox</a> and <a href="qtextbrowser.html#8b6057">QTextBrowser</a>.
<h3 class="fn">void<a name="ec8fd5"></a>QScrollView::viewportMouseReleaseEvent(<a href="qmouseevent.html">QMouseEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all mouse
release events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#0a15fd">contentsMouseReleaseEvent</a>().
<p>See also <a href="qwidget.html#773a0f">QWidget::mouseReleaseEvent</a>().
<p>Reimplemented in <a href="qlistbox.html#dd3760">QListBox</a>, <a href="qtextview.html#cab69c">QTextView</a> and <a href="qtextbrowser.html#c8fcfc">QTextBrowser</a>.
<h3 class="fn">void<a name="94feb6"></a>QScrollView::viewportPaintEvent(<a href="qpaintevent.html">QPaintEvent</a>*pe) <code>[virtualprotected]</code></h3>
<p>This is a low-level painting routine that draws the viewport
contents. Reimplement this if <a href="#310baa">drawContents</a>() is too high-level.
(for example, if you don't want to open a <a href="qpainter.html">QPainter</a> on the viewport).
<p>Reimplemented in <a href="qlistbox.html#6c31cf">QListBox</a>.
<h3 class="fn">void<a name="5aaf73"></a>QScrollView::viewportResizeEvent(<a href="qresizeevent.html">QResizeEvent</a>*) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents, this method
receives all resize events sent to the viewport.
<p>See also <a href="qwidget.html#28c156">QWidget::resizeEvent</a>().
<p>Reimplemented in <a href="qtextview.html#327a09">QTextView</a>.
<h3 class="fn"><a href="qsize.html">QSize</a><a name="99eab2"></a>QScrollView::viewportSize(intx, inty)const</h3>
<p>Returns the viewport size for size (<em>x, y).</em>
<p>The viewport size depends on <em>x,y</em> (the size of the contents), the
size of this widget, the modes of the horizontal and vertical scroll
bars.
<p>This function permits widgets that can trade vertical and horizontal
space for each other to control scroll bar appearance better. For
example, a word processor or web browser can control the width of
the right margin accurately, whether there needs to be a vertical
scroll bar or not.
<h3 class="fn"><a href="qpoint.html">QPoint</a><a name="0eca58"></a>QScrollView::viewportToContents(const<a href="qpoint.html">QPoint</a>&vp)</h3>
<p>Returns the
point on the viewport <em>vp</em>
translated to
a point in the contents.
<h3 class="fn">void<a name="7826a5"></a>QScrollView::viewportToContents(intvx, intvy, int&x, int&y)</h3>
<p>Translates
a point (<em>vx, vy)</em> on the <a href="#040cb5">viewport</a>() widget
to
a point (<em>x, y)</em> in the contents.
<h3 class="fn">void<a name="a7f69e"></a>QScrollView::viewportWheelEvent(<a href="qwheelevent.html">QWheelEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>To provide simple processing of events on the contents,
this method receives all wheel
events sent to the viewport.
<p>The default implementation translates the event and calls
<a href="#7b7a84">contentsWheelEvent</a>().
<p>See also <a href="qwidget.html#cd6485">QWidget::wheelEvent</a>().
<h3 class="fn">int<a name="0d27c5"></a>QScrollView::visibleHeight()const</h3>
<p>Returns the vertical amount of the content that is visible.
<h3 class="fn">int<a name="0f2055"></a>QScrollView::visibleWidth()const</h3>
<p>Returns the horizontal amount of the content that is visible.
<h3 class="fn">void<a name="88d073"></a>QScrollView::wheelEvent(<a href="qwheelevent.html">QWheelEvent</a>*e) <code>[virtualprotected]</code></h3>
<p>Reimplemented for internal reasons; the API is not affected.
<p>Reimplemented from <a href="qwidget.html#cd6485">QWidget.</a>
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