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<title>Buttons and Groupboxes</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Buttons and Groupboxes</h1>
<p>
This example shows different types of groupboxes (buttongroups, etc.) and
different kinds of buttons (checkboxes, radiobuttons, pushbuttons, etc.).
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/buttongroups.h 3.0.2 edited Oct 12 12:18 $
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#ifndef BUTTONS_GROUPS_H
#define BUTTONS_GROUPS_H
#include <<a href="qwidget-h.html">qwidget.h</a>>
class QCheckBox;
class QRadioButton;
class ButtonsGroups : public <a href="qwidget.html">QWidget</a>
{
<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
public:
ButtonsGroups( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0 );
protected:
<a href="qcheckbox.html">QCheckBox</a> *state;
<a href="qradiobutton.html">QRadioButton</a> *rb21, *rb22, *rb23;
protected slots:
void slotChangeGrp3State();
};
#endif
</pre>
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/buttongroups.cpp 3.0.2 edited Dec 7 16:21 $
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "buttongroups.h"
#include <<a href="qbuttongroup-h.html">qbuttongroup.h</a>>
#include <<a href="qlayout-h.html">qlayout.h</a>>
#include <<a href="qradiobutton-h.html">qradiobutton.h</a>>
#include <<a href="qcheckbox-h.html">qcheckbox.h</a>>
#include <<a href="qgroupbox-h.html">qgroupbox.h</a>>
#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>
/*
* Constructor
*
* Creates all child widgets of the ButtonGroups window
*/
<a name="f498"></a>ButtonsGroups::ButtonsGroups( <a href="qwidget.html">QWidget</a> *parent, const char *name )
: <a href="qwidget.html">QWidget</a>( parent, name )
{
// Create Widgets which allow easy layouting
<a href="qvboxlayout.html">QVBoxLayout</a> *vbox = new <a href="qvboxlayout.html">QVBoxLayout</a>( this );
<a href="qhboxlayout.html">QHBoxLayout</a> *box1 = new <a href="qhboxlayout.html">QHBoxLayout</a>( vbox );
<a href="qhboxlayout.html">QHBoxLayout</a> *box2 = new <a href="qhboxlayout.html">QHBoxLayout</a>( vbox );
// ------- first group
// Create an exclusive button group
<a href="qbuttongroup.html">QButtonGroup</a> *bgrp1 = new <a href="qbuttongroup.html">QButtonGroup</a>( 1, QGroupBox::Horizontal, "Button Group &1 (exclusive)", this);
box1-><a href="qboxlayout.html#addWidget">addWidget</a>( bgrp1 );
<a name="x1886"></a> bgrp1-><a href="qbuttongroup.html#setExclusive">setExclusive</a>( TRUE );
// insert 3 radiobuttons
<a href="qradiobutton.html">QRadioButton</a> *rb11 = new <a href="qradiobutton.html">QRadioButton</a>( "&Radiobutton 1", bgrp1 );
<a name="x1894"></a> rb11-><a href="qradiobutton.html#setChecked">setChecked</a>( TRUE );
(void)new <a href="qradiobutton.html">QRadioButton</a>( "R&adiobutton 2", bgrp1 );
(void)new <a href="qradiobutton.html">QRadioButton</a>( "Ra&diobutton 3", bgrp1 );
// ------- second group
// Create a non-exclusive buttongroup
<a href="qbuttongroup.html">QButtonGroup</a> *bgrp2 = new <a href="qbuttongroup.html">QButtonGroup</a>( 1, QGroupBox::Horizontal, "Button Group &2 (non-exclusive)", this );
box1-><a href="qboxlayout.html#addWidget">addWidget</a>( bgrp2 );
bgrp2-><a href="qbuttongroup.html#setExclusive">setExclusive</a>( FALSE );
// insert 3 checkboxes
(void)new <a href="qcheckbox.html">QCheckBox</a>( "&Checkbox 1", bgrp2 );
<a href="qcheckbox.html">QCheckBox</a> *cb12 = new <a href="qcheckbox.html">QCheckBox</a>( "C&heckbox 2", bgrp2 );
<a name="x1889"></a> cb12-><a href="qcheckbox.html#setChecked">setChecked</a>( TRUE );
<a href="qcheckbox.html">QCheckBox</a> *cb13 = new <a href="qcheckbox.html">QCheckBox</a>( "Triple &State Button", bgrp2 );
<a name="x1890"></a> cb13-><a href="qcheckbox.html#setTristate">setTristate</a>( TRUE );
cb13-><a href="qcheckbox.html#setChecked">setChecked</a>( TRUE );
// ------------ third group
// create a buttongroup which is exclusive for radiobuttons and non-exclusive for all other buttons
<a href="qbuttongroup.html">QButtonGroup</a> *bgrp3 = new <a href="qbuttongroup.html">QButtonGroup</a>( 1, QGroupBox::Horizontal, "Button Group &3 (Radiobutton-exclusive)", this );
box2-><a href="qboxlayout.html#addWidget">addWidget</a>( bgrp3 );
<a name="x1887"></a> bgrp3-><a href="qbuttongroup.html#setRadioButtonExclusive">setRadioButtonExclusive</a>( TRUE );
// insert three radiobuttons
rb21 = new <a href="qradiobutton.html">QRadioButton</a>( "Rad&iobutton 1", bgrp3 );
rb22 = new <a href="qradiobutton.html">QRadioButton</a>( "Radi&obutton 2", bgrp3 );
rb23 = new <a href="qradiobutton.html">QRadioButton</a>( "Radio&button 3", bgrp3 );
rb23-><a href="qradiobutton.html#setChecked">setChecked</a>( TRUE );
// insert a checkbox...
state = new <a href="qcheckbox.html">QCheckBox</a>( "E&nable Radiobuttons", bgrp3 );
state-><a href="qcheckbox.html#setChecked">setChecked</a>( TRUE );
// ...and connect its SIGNAL clicked() with the SLOT slotChangeGrp3State()
<a href="qobject.html#connect">connect</a>( state, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ), this, SLOT( slotChangeGrp3State() ) );
// ------------ fourth group
// create a groupbox which layouts its childs in a columns
<a href="qgroupbox.html">QGroupBox</a> *bgrp4 = new <a href="qbuttongroup.html">QButtonGroup</a>( 1, QGroupBox::Horizontal, "Groupbox with &normal buttons", this );
box2-><a href="qboxlayout.html#addWidget">addWidget</a>( bgrp4 );
// insert three pushbuttons...
(void)new <a href="qpushbutton.html">QPushButton</a>( "&Push Button", bgrp4 );
<a href="qpushbutton.html">QPushButton</a> *tb2 = new <a href="qpushbutton.html">QPushButton</a>( "&Toggle Button", bgrp4 );
<a href="qpushbutton.html">QPushButton</a> *tb3 = new <a href="qpushbutton.html">QPushButton</a>( "&Flat Button", bgrp4 );
// ... and make the second one a toggle button
<a name="x1893"></a> tb2-><a href="qpushbutton.html#setToggleButton">setToggleButton</a>( TRUE );
<a name="x1892"></a> tb2-><a href="qpushbutton.html#setOn">setOn</a>( TRUE );
// ... and make the third one a flat button
<a name="x1891"></a> tb3-><a href="qpushbutton.html#setFlat">setFlat</a>(TRUE);
}
/*
* SLOT slotChangeGrp3State()
*
* enables/disables the radiobuttons of the third buttongroup
*/
void <a name="f499"></a>ButtonsGroups::slotChangeGrp3State()
{
<a name="x1895"></a><a name="x1888"></a> rb21-><a href="qwidget.html#setEnabled">setEnabled</a>( state-><a href="qcheckbox.html#isChecked">isChecked</a>() );
rb22-><a href="qwidget.html#setEnabled">setEnabled</a>( state-><a href="qcheckbox.html#isChecked">isChecked</a>() );
rb23-><a href="qwidget.html#setEnabled">setEnabled</a>( state-><a href="qcheckbox.html#isChecked">isChecked</a>() );
}
</pre>
<p> <hr>
<p> Main:
<pre>/****************************************************************************
** $Id: qt/main.cpp 3.0.2 edited Oct 12 12:18 $
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "buttongroups.h"
#include <<a href="qapplication-h.html">qapplication.h</a>>
int main( int argc, char **argv )
{
<a href="qapplication.html">QApplication</a> a( argc, argv );
ButtonsGroups buttonsgroups;
buttonsgroups.<a href="qwidget.html#resize">resize</a>( 500, 250 );
buttonsgroups.<a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Buttongroups" );
a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &buttonsgroups );
buttonsgroups.<a href="qwidget.html#show">show</a>();
return a.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p>See also <a href="examples.html">Examples</a>.
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