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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>Listviews with Checkable Items</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>Listviews with Checkable Items</h1>

 
<p> 
This example program shows how to use listviews with different types of
checkable items.
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/checklists.h   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 TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#ifndef CHECKLISTS_H
#define CHECKLISTS_H

#include &lt;<a href="tqwidget-h.html">tqwidget.h</a>&gt;

class TQListView;
class TQLabel;

class CheckLists : public <a href="tqwidget.html">TQWidget</a>
{
    <a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>

public:
    CheckLists( <a href="tqwidget.html">TQWidget</a> *parent = 0, const char *name = 0 );

protected:
    <a href="tqlistview.html">TQListView</a> *lv1, *lv2;
    <a href="tqlabel.html">TQLabel</a> *label;

protected slots:
    void copy1to2();
    void copy2to3();

};

#endif
</pre>

<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/checklists.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 TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include "checklists.h"

#include &lt;<a href="tqlistview-h.html">tqlistview.h</a>&gt;
#include &lt;<a href="tqvbox-h.html">tqvbox.h</a>&gt;
#include &lt;<a href="tqlabel-h.html">tqlabel.h</a>&gt;
#include &lt;<a href="tqvaluelist-h.html">tqvaluelist.h</a>&gt;
#include &lt;<a href="tqstring-h.html">tqstring.h</a>&gt;
#include &lt;<a href="tqpushbutton-h.html">tqpushbutton.h</a>&gt;
#include &lt;<a href="tqlayout-h.html">tqlayout.h</a>&gt;

/*
 * Constructor
 *
 * Create all child widgets of the CheckList Widget
 */

<a name="f248"></a>CheckLists::CheckLists( <a href="tqwidget.html">TQWidget</a> *parent, const char *name )
    : <a href="tqwidget.html">TQWidget</a>( parent, name )
{
    <a href="tqhboxlayout.html">TQHBoxLayout</a> *lay = new <a href="tqhboxlayout.html">TQHBoxLayout</a>( this );
<a name="x426"></a>    lay-&gt;<a href="tqlayout.html#setMargin">setMargin</a>( 5 );

    // create a widget which layouts its childs in a column
    <a href="tqvboxlayout.html">TQVBoxLayout</a> *vbox1 = new <a href="tqvboxlayout.html">TQVBoxLayout</a>( lay );
    vbox1-&gt;<a href="tqlayout.html#setMargin">setMargin</a>( 5 );

    // First child: a Label
<a name="x423"></a>    vbox1-&gt;<a href="tqboxlayout.html#addWidget">addWidget</a>( new <a href="tqlabel.html">TQLabel</a>( "Check some items!", this ) );

    // Second child: the ListView
    lv1 = new <a href="tqlistview.html">TQListView</a>( this );
    vbox1-&gt;<a href="tqboxlayout.html#addWidget">addWidget</a>( lv1 );
<a name="x427"></a>    lv1-&gt;<a href="tqlistview.html#addColumn">addColumn</a>( "Items" );
<a name="x429"></a>    lv1-&gt;<a href="tqlistview.html#setRootIsDecorated">setRootIsDecorated</a>( TRUE );

    // create a list with 4 ListViewItems which will be parent items of other ListViewItems
    <a href="tqvaluelist.html">TQValueList</a>&lt;TQListViewItem *&gt; parentList;

<a name="x434"></a>    parentList.<a href="tqvaluelist.html#append">append</a>( new <a href="tqchecklistitem.html">TQCheckListItem</a>( lv1, "Parent Item 1", TQCheckListItem::CheckBoxController ) );
    parentList.<a href="tqvaluelist.html#append">append</a>( new <a href="tqchecklistitem.html">TQCheckListItem</a>( lv1, "Parent Item 2", TQCheckListItem::CheckBoxController ) );
    parentList.<a href="tqvaluelist.html#append">append</a>( new <a href="tqchecklistitem.html">TQCheckListItem</a>( lv1, "Parent Item 3", TQCheckListItem::CheckBoxController ) );
    parentList.<a href="tqvaluelist.html#append">append</a>( new <a href="tqchecklistitem.html">TQCheckListItem</a>( lv1, "Parent Item 4", TQCheckListItem::CheckBoxController ) );

    <a href="tqlistviewitem.html">TQListViewItem</a> *item = 0;
    unsigned int num = 1;
    // go through the list of parent items...
<a name="x436"></a><a name="x435"></a>    for ( TQValueList&lt;TQListViewItem*&gt;::Iterator it = parentList.<a href="tqvaluelist.html#begin">begin</a>(); it != parentList.<a href="tqvaluelist.html#end">end</a>();
          ( *it )-&gt;setOpen( TRUE ), ++it, num++ ) {
        item = *it;
        // ...and create 5 checkable child ListViewItems for each parent item
        for ( unsigned int i = 1; i &lt;= 5; i++ )
            (void)new <a href="tqchecklistitem.html">TQCheckListItem</a>( item, TQString( "%1. Child of Parent %2" ).arg( i ).arg( num ), TQCheckListItem::CheckBox );
    }

    // Create another widget for layouting
    <a href="tqvboxlayout.html">TQVBoxLayout</a> *tmp = new <a href="tqvboxlayout.html">TQVBoxLayout</a>( lay );
    tmp-&gt;<a href="tqlayout.html#setMargin">setMargin</a>( 5 );

    // create a pushbutton
    <a href="tqpushbutton.html">TQPushButton</a> *copy1 = new <a href="tqpushbutton.html">TQPushButton</a>( "  -&gt;  ", this );
    tmp-&gt;<a href="tqboxlayout.html#addWidget">addWidget</a>( copy1 );
<a name="x437"></a><a name="x433"></a>    copy1-&gt;<a href="tqwidget.html#setMaximumWidth">setMaximumWidth</a>( copy1-&gt;<a href="tqwidget.html#sizeHint">sizeHint</a>().width() );
    // connect the TQ_SIGNAL clicked() of the pushbutton with the TQ_SLOT copy1to2()
    <a href="tqobject.html#connect">connect</a>( copy1, TQ_SIGNAL( <a href="tqbutton.html#clicked">clicked</a>() ), this, TQ_SLOT( copy1to2() ) );

    // another widget for layouting
    <a href="tqvboxlayout.html">TQVBoxLayout</a> *vbox2 = new <a href="tqvboxlayout.html">TQVBoxLayout</a>( lay );
    vbox2-&gt;<a href="tqlayout.html#setMargin">setMargin</a>( 5 );

    // and another label
    vbox2-&gt;<a href="tqboxlayout.html#addWidget">addWidget</a>( new <a href="tqlabel.html">TQLabel</a>( "Check one item!", this ) );

    // create the second listview
    lv2 = new <a href="tqlistview.html">TQListView</a>( this );
    vbox2-&gt;<a href="tqboxlayout.html#addWidget">addWidget</a>( lv2 );
    lv2-&gt;<a href="tqlistview.html#addColumn">addColumn</a>( "Items" );
    lv2-&gt;<a href="tqlistview.html#setRootIsDecorated">setRootIsDecorated</a>( TRUE );

    // another widget needed for layouting only
    tmp = new <a href="tqvboxlayout.html">TQVBoxLayout</a>( lay );
    tmp-&gt;<a href="tqlayout.html#setMargin">setMargin</a>( 5 );

    // create another pushbutton...
    <a href="tqpushbutton.html">TQPushButton</a> *copy2 = new <a href="tqpushbutton.html">TQPushButton</a>( "  -&gt;  ", this );
    lay-&gt;<a href="tqboxlayout.html#addWidget">addWidget</a>( copy2 );
    copy2-&gt;<a href="tqwidget.html#setMaximumWidth">setMaximumWidth</a>( copy2-&gt;<a href="tqwidget.html#sizeHint">sizeHint</a>().width() );
    // ...and connect its clicked() TQ_SIGNAL to the copy2to3() TQ_SLOT
    <a href="tqobject.html#connect">connect</a>( copy2, TQ_SIGNAL( <a href="tqbutton.html#clicked">clicked</a>() ), this, TQ_SLOT( copy2to3() ) );

    tmp = new <a href="tqvboxlayout.html">TQVBoxLayout</a>( lay );
    tmp-&gt;<a href="tqlayout.html#setMargin">setMargin</a>( 5 );

    // and create a label which will be at the right of the window
    label = new <a href="tqlabel.html">TQLabel</a>( "No Item yet...", this );
    tmp-&gt;<a href="tqboxlayout.html#addWidget">addWidget</a>( label );
}

/*
 * TQ_SLOT copy1to2()
 *
 * Copies all checked ListViewItems from the first ListView to
 * the second one, and inserts them as Radio-ListViewItem.
 */

void <a name="f249"></a>CheckLists::copy1to2()
{
    // create an iterator which operates on the first ListView
    <a href="tqlistviewitemiterator.html">TQListViewItemIterator</a> it( lv1 );

<a name="x428"></a>    lv2-&gt;<a href="tqlistview.html#clear">clear</a>();

    // Insert first a controller Item into the second ListView. Always if Radio-ListViewItems
    // are inserted into a Listview, the parent item of these MUST be a controller Item!
    <a href="tqchecklistitem.html">TQCheckListItem</a> *item = new <a href="tqchecklistitem.html">TQCheckListItem</a>( lv2, "Controller", TQCheckListItem::Controller );
<a name="x431"></a>    item-&gt;<a href="tqlistviewitem.html#setOpen">setOpen</a>( TRUE );

    // iterate through the first ListView...
<a name="x432"></a>    for ( ; it.<a href="tqlistviewitemiterator.html#current">current</a>(); ++it )
        // ...check state of childs, and...
        if ( it.<a href="tqlistviewitemiterator.html#current">current</a>()-&gt;parent() )
            // ...if the item is checked...
            if ( ( (TQCheckListItem*)it.<a href="tqlistviewitemiterator.html#current">current</a>() )-&gt;isOn() )
                // ...insert a Radio-ListViewItem with the same text into the second ListView
                (void)new <a href="tqchecklistitem.html">TQCheckListItem</a>( item, it.<a href="tqlistviewitemiterator.html#current">current</a>()-&gt;text( 0 ), TQCheckListItem::RadioButton );

<a name="x430"></a>    if ( item-&gt;<a href="tqlistviewitem.html#firstChild">firstChild</a>() )
        ( ( <a href="tqchecklistitem.html">TQCheckListItem</a>* )item-&gt;<a href="tqlistviewitem.html#firstChild">firstChild</a>() )-&gt;setOn( TRUE );
}

/*
 * TQ_SLOT copy2to3()
 *
 * Copies the checked item of the second ListView into the
 * Label at the right.
 */

void <a name="f250"></a>CheckLists::copy2to3()
{
    // create an iterator which operates on the second ListView
    <a href="tqlistviewitemiterator.html">TQListViewItemIterator</a> it( lv2 );

    label-&gt;<a href="tqlabel.html#setText">setText</a>( "No Item checked" );

    // iterate through the second ListView...
    for ( ; it.<a href="tqlistviewitemiterator.html#current">current</a>(); ++it )
        // ...check state of childs, and...
        if ( it.<a href="tqlistviewitemiterator.html#current">current</a>()-&gt;parent() )
            // ...if the item is checked...
            if ( ( (TQCheckListItem*)it.<a href="tqlistviewitemiterator.html#current">current</a>() )-&gt;isOn() )
                // ...set the text of the item to the label
                label-&gt;<a href="tqlabel.html#setText">setText</a>( it.<a href="tqlistviewitemiterator.html#current">current</a>()-&gt;text( 0 ) );
}

</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 TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include "checklists.h"
#include &lt;<a href="tqapplication-h.html">tqapplication.h</a>&gt;

int main( int argc, char **argv )
{
    <a href="tqapplication.html">TQApplication</a> a( argc, argv );

    CheckLists checklists;
    checklists.<a href="tqwidget.html#resize">resize</a>( 650, 350 );
    checklists.<a href="tqwidget.html#setCaption">setCaption</a>( "TQt Example - CheckLists" );
    a.<a href="tqapplication.html#setMainWidget">setMainWidget</a>( &amp;checklists );
    checklists.<a href="tqwidget.html#show">show</a>();

    return a.<a href="tqapplication.html#exec">exec</a>();
}
</pre>

<p>See also <a href="examples.html">Examples</a>.

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