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326 lines
14 KiB
326 lines
14 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/listbox/listbox.doc:4 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Listbox Example</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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| <a href="classes.html">
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<font color="#004faf">All Classes</font></a>
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| <a href="mainclasses.html">
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<font color="#004faf">Main Classes</font></a>
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| <a href="annotated.html">
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<font color="#004faf">Annotated</font></a>
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| <a href="groups.html">
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<font color="#004faf">Grouped Classes</font></a>
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| <a href="functions.html">
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<font color="#004faf">Functions</font></a>
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</td>
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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>Listbox Example</h1>
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<p>
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This example shows how to use the different modes (single columns, multiple columns,
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fixed number of rows, etc.) of <a href="qlistbox.html">QListBox</a>.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/listbox.h 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef LISTBOX_H
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#define LISTBOX_H
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class QSpinBox;
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class QListBox;
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class QButtonGroup;
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#include <<a href="qwidget-h.html">qwidget.h</a>>
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class ListBoxDemo: public <a href="qwidget.html">QWidget</a>
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{
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<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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public:
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ListBoxDemo();
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~ListBoxDemo();
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private slots:
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void setNumRows();
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void setNumCols();
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void setRowsByHeight();
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void setColsByWidth();
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void setVariableWidth( bool );
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void setVariableHeight( bool );
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void setMultiSelection( bool );
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void sortAscending();
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void sortDescending();
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private:
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<a href="qlistbox.html">QListBox</a> * l;
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<a href="qspinbox.html">QSpinBox</a> * columns;
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<a href="qspinbox.html">QSpinBox</a> * rows;
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<a href="qbuttongroup.html">QButtonGroup</a> * bg;
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};
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#endif
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/listbox.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "listbox.h"
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#include <<a href="qlabel-h.html">qlabel.h</a>>
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#include <<a href="qradiobutton-h.html">qradiobutton.h</a>>
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#include <<a href="qcheckbox-h.html">qcheckbox.h</a>>
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#include <<a href="qspinbox-h.html">qspinbox.h</a>>
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#include <<a href="qlistbox-h.html">qlistbox.h</a>>
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#include <<a href="qbuttongroup-h.html">qbuttongroup.h</a>>
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#include <<a href="qlayout-h.html">qlayout.h</a>>
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#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>
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<a name="f441"></a>ListBoxDemo::ListBoxDemo()
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: <a href="qwidget.html">QWidget</a>( 0, 0 )
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{
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<a href="qgridlayout.html">QGridLayout</a> * g = new <a href="qgridlayout.html">QGridLayout</a>( this, 2, 2, 6 );
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g-><a href="qgridlayout.html#addWidget">addWidget</a>( new <a href="qlabel.html">QLabel</a>( "<b>Configuration:</b>", this ), 0, 0 );
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g-><a href="qgridlayout.html#addWidget">addWidget</a>( new <a href="qlabel.html">QLabel</a>( "<b>Result:</b>", this ), 0, 1 );
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l = new <a href="qlistbox.html">QListBox</a>( this );
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g-><a href="qgridlayout.html#addWidget">addWidget</a>( l, 1, 1 );
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<a name="x1447"></a> l-><a href="qwidget.html#setFocusPolicy">setFocusPolicy</a>( QWidget::StrongFocus );
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<a href="qvboxlayout.html">QVBoxLayout</a> * v = new <a href="qvboxlayout.html">QVBoxLayout</a>;
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<a name="x1430"></a> g-><a href="qgridlayout.html#addLayout">addLayout</a>( v, 1, 0 );
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<a href="qradiobutton.html">QRadioButton</a> * b;
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bg = new <a href="qbuttongroup.html">QButtonGroup</a>( 0 );
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b = new <a href="qradiobutton.html">QRadioButton</a>( "Fixed number of columns,\n"
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"as many rows as needed.",
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this );
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<a name="x1428"></a> bg-><a href="qbuttongroup.html#insert">insert</a>( b );
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<a name="x1425"></a> v-><a href="qboxlayout.html#addWidget">addWidget</a>( b );
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<a name="x1440"></a> b-><a href="qradiobutton.html#setChecked">setChecked</a>( TRUE );
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<a name="x1426"></a> <a href="qobject.html#connect">connect</a>( b, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), this, SLOT(setNumCols()) );
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<a href="qhboxlayout.html">QHBoxLayout</a> * h = new <a href="qhboxlayout.html">QHBoxLayout</a>;
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<a name="x1422"></a> v-><a href="qboxlayout.html#addLayout">addLayout</a>( h );
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<a name="x1423"></a> h-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 30 );
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h-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 100 );
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h-><a href="qboxlayout.html#addWidget">addWidget</a>( new <a href="qlabel.html">QLabel</a>( "Columns:", this ) );
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columns = new <a href="qspinbox.html">QSpinBox</a>( this );
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h-><a href="qboxlayout.html#addWidget">addWidget</a>( columns );
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v-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 12 );
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b = new <a href="qradiobutton.html">QRadioButton</a>( "As many columns as fit on-screen,\n"
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"as many rows as needed.",
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this );
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bg-><a href="qbuttongroup.html#insert">insert</a>( b );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( b );
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<a href="qobject.html#connect">connect</a>( b, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), this, SLOT(setColsByWidth()) );
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v-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 12 );
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b = new <a href="qradiobutton.html">QRadioButton</a>( "Fixed number of rows,\n"
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"as many columns as needed.",
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this );
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bg-><a href="qbuttongroup.html#insert">insert</a>( b );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( b );
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<a href="qobject.html#connect">connect</a>( b, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), this, SLOT(setNumRows()) );
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h = new <a href="qhboxlayout.html">QHBoxLayout</a>;
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v-><a href="qboxlayout.html#addLayout">addLayout</a>( h );
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h-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 30 );
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h-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 100 );
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h-><a href="qboxlayout.html#addWidget">addWidget</a>( new <a href="qlabel.html">QLabel</a>( "Rows:", this ) );
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rows = new <a href="qspinbox.html">QSpinBox</a>( this );
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<a name="x1442"></a> rows-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
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h-><a href="qboxlayout.html#addWidget">addWidget</a>( rows );
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v-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 12 );
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b = new <a href="qradiobutton.html">QRadioButton</a>( "As many rows as fit on-screen,\n"
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"as many columns as needed.",
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this );
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bg-><a href="qbuttongroup.html#insert">insert</a>( b );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( b );
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<a href="qobject.html#connect">connect</a>( b, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), this, SLOT(setRowsByHeight()) );
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v-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 12 );
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<a href="qcheckbox.html">QCheckBox</a> * cb = new <a href="qcheckbox.html">QCheckBox</a>( "Variable-height rows", this );
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<a name="x1429"></a> cb-><a href="qcheckbox.html#setChecked">setChecked</a>( TRUE );
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<a name="x1427"></a> <a href="qobject.html#connect">connect</a>( cb, SIGNAL(<a href="qbutton.html#toggled">toggled</a>(bool)), this, SLOT(setVariableHeight(bool)) );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( cb );
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v-><a href="qboxlayout.html#addSpacing">addSpacing</a>( 6 );
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cb = new <a href="qcheckbox.html">QCheckBox</a>( "Variable-width columns", this );
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<a href="qobject.html#connect">connect</a>( cb, SIGNAL(<a href="qbutton.html#toggled">toggled</a>(bool)), this, SLOT(setVariableWidth(bool)) );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( cb );
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cb = new <a href="qcheckbox.html">QCheckBox</a>( "Extended-Selection", this );
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<a href="qobject.html#connect">connect</a>( cb, SIGNAL(<a href="qbutton.html#toggled">toggled</a>(bool)), this, SLOT(setMultiSelection(bool)) );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( cb );
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<a href="qpushbutton.html">QPushButton</a> *pb = new <a href="qpushbutton.html">QPushButton</a>( "Sort ascending", this );
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<a href="qobject.html#connect">connect</a>( pb, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ), this, SLOT( sortAscending() ) );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( pb );
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pb = new <a href="qpushbutton.html">QPushButton</a>( "Sort descending", this );
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<a href="qobject.html#connect">connect</a>( pb, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ), this, SLOT( sortDescending() ) );
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v-><a href="qboxlayout.html#addWidget">addWidget</a>( pb );
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<a name="x1424"></a> v-><a href="qboxlayout.html#addStretch">addStretch</a>( 100 );
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int i = 0;
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while( ++i <= 2560 )
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<a name="x1446"></a><a name="x1433"></a> l-><a href="qlistbox.html#insertItem">insertItem</a>( QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "Item " ) + QString::number( i ),
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i );
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<a name="x1441"></a> columns-><a href="qrangecontrol.html#setRange">setRange</a>( 1, 256 );
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<a name="x1443"></a> columns-><a href="qspinbox.html#setValue">setValue</a>( 1 );
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rows-><a href="qrangecontrol.html#setRange">setRange</a>( 1, 256 );
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rows-><a href="qspinbox.html#setValue">setValue</a>( 256 );
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<a name="x1445"></a> <a href="qobject.html#connect">connect</a>( columns, SIGNAL(<a href="qspinbox.html#valueChanged">valueChanged</a>(int)), this, SLOT(setNumCols()) );
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<a href="qobject.html#connect">connect</a>( rows, SIGNAL(<a href="qspinbox.html#valueChanged">valueChanged</a>(int)), this, SLOT(setNumRows()) );
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}
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ListBoxDemo::~ListBoxDemo()
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{
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delete bg;
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}
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void <a name="f442"></a>ListBoxDemo::setNumRows()
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{
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columns-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
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rows-><a href="qwidget.html#setEnabled">setEnabled</a>( TRUE );
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<a name="x1444"></a><a name="x1435"></a> l-><a href="qlistbox.html#setRowMode">setRowMode</a>( rows-><a href="qspinbox.html#value">value</a>() );
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}
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void <a name="f443"></a>ListBoxDemo::setNumCols()
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{
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columns-><a href="qwidget.html#setEnabled">setEnabled</a>( TRUE );
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rows-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
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<a name="x1434"></a> l-><a href="qlistbox.html#setColumnMode">setColumnMode</a>( columns-><a href="qspinbox.html#value">value</a>() );
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}
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void <a name="f444"></a>ListBoxDemo::setRowsByHeight()
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{
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columns-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
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rows-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
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l-><a href="qlistbox.html#setRowMode">setRowMode</a>( QListBox::FitToHeight );
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}
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void <a name="f445"></a>ListBoxDemo::setColsByWidth()
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{
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columns-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
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rows-><a href="qwidget.html#setEnabled">setEnabled</a>( FALSE );
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l-><a href="qlistbox.html#setColumnMode">setColumnMode</a>( QListBox::FitToWidth );
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}
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void <a name="f446"></a>ListBoxDemo::setVariableWidth( bool b )
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{
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<a name="x1438"></a> l-><a href="qlistbox.html#setVariableWidth">setVariableWidth</a>( b );
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}
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void <a name="f447"></a>ListBoxDemo::setVariableHeight( bool b )
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{
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<a name="x1437"></a> l-><a href="qlistbox.html#setVariableHeight">setVariableHeight</a>( b );
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}
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void <a name="f448"></a>ListBoxDemo::setMultiSelection( bool b )
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{
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<a name="x1432"></a> l-><a href="qlistbox.html#clearSelection">clearSelection</a>();
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<a name="x1436"></a> l-><a href="qlistbox.html#setSelectionMode">setSelectionMode</a>( b ? QListBox::Extended : <a href="qlistbox.html">QListBox</a>::Single );
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}
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void <a name="f449"></a>ListBoxDemo::sortAscending()
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{
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<a name="x1439"></a> l-><a href="qlistbox.html#sort">sort</a>( TRUE );
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}
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void <a name="f450"></a>ListBoxDemo::sortDescending()
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{
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l-><a href="qlistbox.html#sort">sort</a>( FALSE );
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}
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p> <hr>
|
||
|
|
<p> Main:
|
||
|
|
<p> <pre>/****************************************************************************
|
||
|
|
** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
|
||
|
|
**
|
||
|
|
** Copyright (C) 1992-2007 Trolltech ASA. 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 "listbox.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 );
|
||
|
|
|
||
|
|
ListBoxDemo t;
|
||
|
|
t.<a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Listbox" );
|
||
|
|
a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &t );
|
||
|
|
t.<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>.
|
||
|
|
|
||
|
|
<!-- eof -->
|
||
|
|
<p><address><hr><div align=center>
|
||
|
|
<table width=100% cellspacing=0 border=0><tr>
|
||
|
|
<td>Copyright © 2007
|
||
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
||
|
|
<td align=right><div align=right>Qt 3.3.8</div>
|
||
|
|
</table></div></address></body>
|
||
|
|
</html>
|