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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">
<title>Qt Toolkit - QButtonGroup Class</title><style type="text/css"><!--
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<h1 align=center>QButtonGroup Class Reference</h1><br clear="all">
<p>
The QButtonGroup widget organizes <a href="qbutton.html">QButton</a> widgets in a group.
<a href="#details">More...</a>
<p>
<code>#include <<a href="qbuttongroup-h.html">qbuttongroup.h</a>></code>
<p>
Inherits <a href="qgroupbox.html">QGroupBox</a>.
<p>Inherited by <a href="qhbuttongroup.html">QHButtonGroup</a> and <a href="qvbuttongroup.html">QVButtonGroup</a>.
<p><a href="qbuttongroup-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><div class="fn"><a href="#563e29"><b>QButtonGroup</b></a>(QWidget*parent=0, constchar*name=0)</div>
<li><div class="fn"><a href="#837c07"><b>QButtonGroup</b></a>(constQString&title, QWidget*parent=0, constchar*name=0)</div>
<li><div class="fn"><a href="#f00c6b"><b>QButtonGroup</b></a>(intcolumns, Orientationo, QWidget*parent=0, constchar*name=0)</div>
<li><div class="fn"><a href="#a827d6"><b>QButtonGroup</b></a>(intcolumns, Orientationo, constQString&title, QWidget*parent=0, constchar*name=0)</div>
<li><div class="fn">bool<a href="#1d6f90"><b>isExclusive</b></a>()const</div>
<li><div class="fn">bool<a href="#0e8f21"><b>isRadioButtonExclusive</b></a>()const</div>
<li><div class="fn">virtualvoid<a href="#1075ee"><b>setExclusive</b></a>(bool)</div>
<li><div class="fn">virtualvoid<a href="#d67431"><b>setRadioButtonExclusive</b></a>(bool)</div>
<li><div class="fn">int<a href="#10bf2d"><b>insert</b></a>(QButton*, intid=-1)</div>
<li><div class="fn">void<a href="#66e1b1"><b>remove</b></a>(QButton*)</div>
<li><div class="fn">QButton*<a href="#9e0875"><b>find</b></a>(intid)const</div>
<li><div class="fn">int<a href="#c947e8"><b>id</b></a>(QButton*)const</div>
<li><div class="fn">int<a href="#7c506a"><b>count</b></a>()const</div>
<li><div class="fn">virtualvoid<a href="#5dc823"><b>setButton</b></a>(intid)</div>
<li><div class="fn">virtualvoid<a href="#6a2fbb"><b>moveFocus</b></a>(int)</div>
<li><div class="fn">QButton*<a href="#1952fb"><b>selected</b></a>()</div>
</ul>
<h2>Signals</h2>
<ul>
<li><div class="fn">void<a href="#2ddfc7"><b>pressed</b></a>(intid)</div>
<li><div class="fn">void<a href="#61ef11"><b>released</b></a>(intid)</div>
<li><div class="fn">void<a href="#c8e107"><b>clicked</b></a>(intid)</div>
</ul>
<h2>Protected Slots</h2>
<ul>
<li><div class="fn">void<b>buttonPressed</b>()(internal)</div>
<li><div class="fn">void<b>buttonReleased</b>()(internal)</div>
<li><div class="fn">void<b>buttonClicked</b>()(internal)</div>
<li><div class="fn">void<b>buttonToggled</b>(boolon)(internal)</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>bool<td>exclusive<td>isExclusive<td>setExclusive<td>
<tr><td>bool<td>radioButtonExclusive<td>isRadioButtonExclusive<td>setRadioButtonExclusive<td>
</table>
<hr><h2><a name="details"></a>Detailed Description</h2>
The QButtonGroup widget organizes <a href="qbutton.html">QButton</a> widgets in a group.
<p>
A button group widget makes it easier to deal with groups of
buttons. A button in a button group is associated with a unique
identifer. The button group emits a <a href="#c8e107">clicked</a>() signal with this
identifier when the button is clicked. Thus, a button group is an
ideal solution when you have several similar buttons and want to
connect all their clicked() signals, for example, to one slot.
<p>An <a href="#1075ee">exclusive</a> button group switches off
all toggle buttons except the one that was clicked. A button group
is by default non-exclusive. All <a href="qradiobutton.html">radio
buttons</a> that are <a href="#10bf2d">inserted</a>, will be
mutually exclusive even if the button group is non-exclusive.
<p>There are two ways of using a button group:
<ol>
<li>The button group is a parent widget of a number of buttons,
i.e. the button group is the parent argument in the button constructor.
The buttons are assigned identifiers 0, 1, 2 etc. in the order they are
created. A QButtonGroup can display a frame and a title because it inherits
<a href="qgroupbox.html">QGroupBox</a>.
<li>The button group is an invisible widget and the contained buttons
have some other parent widget. A button must then be manually inserted
using the <a href="#10bf2d">insert</a>() function with an identifer.
</ol>
<p><img src=qbttngrp-m.png> <img src=qbttngrp-w.png>
<p>See also <a href="qbutton.html">QButton</a>, <a href="qpushbutton.html">QPushButton</a>, <a href="qcheckbox.html">QCheckBox</a> and <a href="qradiobutton.html">QRadioButton</a>.
<p>Examples:
<a href="xform-xform-cpp.html#QButtonGroup">xform/xform.cpp</a>
<a href="i18n-main-cpp.html#QButtonGroup">i18n/main.cpp</a>
<a href="drawdemo-drawdemo-cpp.html#QButtonGroup">drawdemo/drawdemo.cpp</a>
<hr><h2>Member Function Documentation</h2>
<h3 class="fn"><a name="563e29"></a>QButtonGroup::QButtonGroup(<a href="qwidget.html">QWidget</a>*parent=0, constchar*name=0)</h3>
<p>Constructs a button group with no title.
<p>The <em>parent</em> and <em>name</em> arguments are passed to the <a href="qwidget.html">QWidget</a> constructor.
<h3 class="fn"><a name="837c07"></a>QButtonGroup::QButtonGroup(const<a href="qstring.html">QString</a>&title, <a href="qwidget.html">QWidget</a>*parent=0, constchar*name=0)</h3>
<p>Constructs a button group with a title.
<p>The <em>parent</em> and <em>name</em> arguments are passed to the <a href="qwidget.html">QWidget</a> constructor.
<h3 class="fn"><a name="f00c6b"></a>QButtonGroup::QButtonGroup(intstrips, <a href="qt.html#Orientation">Orientation</a>orientation, <a href="qwidget.html">QWidget</a>*parent=0, constchar*name=0)</h3>
<p>Constructs a button group with no title. Child widgets will be arranged
in <em>strips</em> rows or columns (depending on <em>orientation).</em>
<p>The <em>parent</em> and <em>name</em> arguments are passed to the <a href="qwidget.html">QWidget</a> constructor.
<h3 class="fn"><a name="a827d6"></a>QButtonGroup::QButtonGroup(intstrips, <a href="qt.html#Orientation">Orientation</a>orientation, const<a href="qstring.html">QString</a>&title, <a href="qwidget.html">QWidget</a>*parent=0, constchar*name=0)</h3>
<p>Constructs a button group with a <em>title.</em> Child widgets will be arranged
in <em>strips</em> rows or columns (depending on <em>orientation).</em>
<p>The <em>parent</em> and <em>name</em> arguments are passed to the <a href="qwidget.html">QWidget</a> constructor.
<h3 class="fn"><a name="53026e"></a>QButtonGroup::~QButtonGroup()</h3>
<p>Reimplemented for internal reasons; the API is not affected.
<h3 class="fn">void<a name="c8e107"></a>QButtonGroup::clicked(intid) <code>[signal]</code></h3>
<p>This signal is emitted when a button in the group is
<a href="qbutton.html#da7248">clicked</a>.
The <em>id</em> argument is the button's identifier.
<h3 class="fn">int<a name="7c506a"></a>QButtonGroup::count()const</h3>
<p>Returns the number of buttons in the group.
<h3 class="fn"><a href="qbutton.html">QButton</a>*<a name="9e0875"></a>QButtonGroup::find(intid)const</h3>
<p>Finds and returns a pointer to the button with the specified identifier
<em>id.</em>
<p>Returns null if the button was not found.
<h3 class="fn">int<a name="c947e8"></a>QButtonGroup::id(<a href="qbutton.html">QButton</a>*button)const</h3>
<p>Returns the id of <em>button,</em> or -1 if <em>button</em> is not a member of
this group.
<h3 class="fn">int<a name="10bf2d"></a>QButtonGroup::insert(<a href="qbutton.html">QButton</a>*button, intid=-1)</h3>
<p>Inserts a button with the identifier <em>id</em> into the button group.
Returns the button identifier.
<p>It is not necessary to manually insert buttons that have this button
group as their parent widget. An exception is when you want custom
identifiers instead of the default 0, 1, 2 etc.
<p>The button is assigned the identifier <em>id</em> or an automatically
generated identifier. It works as follows: If <em>id</em> >= 0, this
identifier is assigned. If <em>id</em> == -1 (default), the identifier is
equal to the number of buttons in the group. If <em>id</em> is any other
negative integer, for instance -2, a unique identifier (negative
integer <= -2) is generated.
<p>Inserting several buttons with <em>id</em> = -1 assigns the identifiers 0,
1, 2, etc.
<p>See also <a href="#9e0875">find</a>(), <a href="#66e1b1">remove</a>() and <a href="#1075ee">setExclusive</a>().
<p>Examples:
<a href="xform-xform-cpp.html#insert">xform/xform.cpp</a>
<h3 class="fn">bool<a name="1d6f90"></a>QButtonGroup::isExclusive()const</h3>
<p>Returns TRUE if the button group is exclusive, otherwise FALSE.
<p>See also <a href="#1075ee">setExclusive</a>().
<h3 class="fn">bool<a name="0e8f21"></a>QButtonGroup::isRadioButtonExclusive()const</h3>
<p>Returns whether this button group will treat radio buttons as
mutually exclusive. The default is TRUE.
<p>See also <a href="#d67431">setRadioButtonExclusive</a>().
<h3 class="fn">void<a name="6a2fbb"></a>QButtonGroup::moveFocus(intkey) <code>[virtual]</code></h3>
<p>Moves the keyboard focus according to <em>key,</em> and if appropriate
checks the new focus item.
<p>This function does nothing unless the keyboard focus points to one
of the button group members and <em>key</em> is one of <code>Key_Up, Key_Down, Key_Left</code> and <code>Key_Right.</code>
<h3 class="fn">void<a name="2ddfc7"></a>QButtonGroup::pressed(intid) <code>[signal]</code></h3>
<p>This signal is emitted when a button in the group is
<a href="qbutton.html#a27000">pressed</a>.
The <em>id</em> argument is the button's identifier.
<h3 class="fn">void<a name="61ef11"></a>QButtonGroup::released(intid) <code>[signal]</code></h3>
<p>This signal is emitted when a button in the group is
<a href="qbutton.html#e6fa8e">released</a>.
The <em>id</em> argument is the button's identifier.
<h3 class="fn">void<a name="66e1b1"></a>QButtonGroup::remove(<a href="qbutton.html">QButton</a>*button)</h3>
<p>Removes a button from the button group.
<p>See also <a href="#10bf2d">insert</a>().
<h3 class="fn"><a href="qbutton.html">QButton</a>*<a name="1952fb"></a>QButtonGroup::selected()</h3>
<p>Returns a pointer to the selected radio button in this group, if
one exists, or 0 if there is no selected radio button in this group.
<p><b>Warning: </b>In future versions of Qt, the selected toggle button will be returned.
<h3 class="fn">void<a name="5dc823"></a>QButtonGroup::setButton(intid) <code>[virtual]</code></h3>
<p>Sets the button with id <em>id</em> to be on, and if this is an
exclusive group, all other button in the group to be off.
<h3 class="fn">void<a name="1075ee"></a>QButtonGroup::setExclusive(boolenable) <code>[virtual]</code></h3>
<p>Sets the button group to be exclusive if <em>enable</em> is TRUE,
or to be non-exclusive if <em>enable</em> is FALSE.
<p>An exclusive button group switches off all other toggle buttons when
one is switched on. This is ideal for groups of <a href="qradiobutton.html">radio buttons</a>. A non-exclusive group allow many buttons to be
switched on at the same time.
<p>The default setting is FALSE.
<p>See also <a href="#1d6f90">isExclusive</a>().
<h3 class="fn">void<a name="d67431"></a>QButtonGroup::setRadioButtonExclusive(boolon) <code>[virtual]</code></h3>
<p>If <em>on</em> is TRUE, this button group will treat radio buttons as
mutually exclusive, and other buttons according to
<a href="#1d6f90">isExclusive</a>().
<h3 class="fn">void<a name="3d5a7f"></a>QButtonGroup::buttonClicked() <code>[protectedslot]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="ff8208"></a>QButtonGroup::buttonPressed() <code>[protectedslot]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="a12762"></a>QButtonGroup::buttonReleased() <code>[protectedslot]</code></h3>
<p>For internal use only.
<h3 class="fn">void<a name="6c8799"></a>QButtonGroup::buttonToggled(boolon) <code>[protectedslot]</code></h3>
<p>For internal use only.
<hr><p>
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