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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>iconview/simple_dd/main.cpp Example File</h1>

 
<pre>/****************************************************************************
** $Id$
**
** Copyright (C) 1992-2001 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 "main.h"

const char* red_icon[]={
"16 16 2 1",
"r c red",
". c None",
"................",
"................",
"..rrrrrrrrrrrr..",
"..rrrrrrrrrrrr..",
"..rrrrrrrrrrrr..",
"..rrr......rrr..",
"..rrr......rrr..",
"..rrr......rrr..",
"..rrr......rrr..",
"..rrr......rrr..",
"..rrr......rrr..",
"..rrrrrrrrrrrr..",
"..rrrrrrrrrrrr..",
"..rrrrrrrrrrrr..",
"................",
"................"};

const char* blue_icon[]={
"16 16 2 1",
"b c blue",
". c None",
"................",
"................",
"..bbbbbbbbbbbb..",
"..bbbbbbbbbbbb..",
"..bbbbbbbbbbbb..",
"..bbb......bbb..",
"..bbb......bbb..",
"..bbb......bbb..",
"..bbb......bbb..",
"..bbb......bbb..",
"..bbb......bbb..",
"..bbbbbbbbbbbb..",
"..bbbbbbbbbbbb..",
"..bbbbbbbbbbbb..",
"................",
"................"};

const char* green_icon[]={
"16 16 2 1",
"g c green",
". c None",
"................",
"................",
"..gggggggggggg..",
"..gggggggggggg..",
"..gggggggggggg..",
"..ggg......ggg..",
"..ggg......ggg..",
"..ggg......ggg..",
"..ggg......ggg..",
"..ggg......ggg..",
"..ggg......ggg..",
"..gggggggggggg..",
"..gggggggggggg..",
"..gggggggggggg..",
"................",
"................"};


// ListBox -- low level drag and drop

<a name="f2"></a>DDListBox::DDListBox( <a href="qwidget.html">QWidget</a> * parent, const char * name, WFlags f ) :
    <a href="qlistbox.html">QListBox</a>( parent, name, f )
{
    <a href="qwidget.html#setAcceptDrops">setAcceptDrops</a>( TRUE );
    dragging = FALSE;
}


<a name="x2500"></a>void DDListBox::<a href="qwidget.html#dragEnterEvent">dragEnterEvent</a>( <a href="qdragenterevent.html">QDragEnterEvent</a> *evt )
{
<a name="x2498"></a>    if ( QTextDrag::<a href="qtextdrag.html#canDecode">canDecode</a>( evt ) )
<a name="x2490"></a>        evt-&gt;<a href="qdragmoveevent.html#accept">accept</a>();
}


<a name="x2501"></a>void DDListBox::<a href="qwidget.html#dropEvent">dropEvent</a>( <a href="qdropevent.html">QDropEvent</a> *evt )
{
    <a href="qstring.html">QString</a> text;

<a name="x2499"></a>    if ( QTextDrag::<a href="qtextdrag.html#decode">decode</a>( evt, text ) )
        <a href="qlistbox.html#insertItem">insertItem</a>( text );
}


<a name="x2503"></a>void DDListBox::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *evt )
{
    QListBox::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( evt );
    dragging = TRUE;
}


<a name="x2502"></a>void DDListBox::<a href="qwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> * )
{
    if ( dragging ) {
        <a href="qdragobject.html">QDragObject</a> *d = new <a href="qtextdrag.html">QTextDrag</a>( currentText(), this );
<a name="x2489"></a>        d-&gt;<a href="qdragobject.html#dragCopy">dragCopy</a>(); // do NOT delete d.
        dragging = FALSE;
    }
}


// IconViewIcon -- high level drag and drop


<a name="x2493"></a>bool DDIconViewItem::<a href="qiconviewitem.html#acceptDrop">acceptDrop</a>( const <a href="qmimesource.html">QMimeSource</a> *mime ) const
{
<a name="x2496"></a>    if ( mime-&gt;<a href="qmimesource.html#provides">provides</a>( "text/plain" ) )
        return TRUE;
    return FALSE;
}


<a name="x2494"></a>void DDIconViewItem::<a href="qiconviewitem.html#dropped">dropped</a>( <a href="qdropevent.html">QDropEvent</a> *evt, const <a href="qvaluelist.html">QValueList</a>&lt;QIconDragItem&gt;&amp; )
{
    <a href="qstring.html">QString</a> label;

    if ( QTextDrag::<a href="qtextdrag.html#decode">decode</a>( evt, label ) )
        setText( label );
}


// IconView -- high level drag and drop

<a name="x2491"></a>QDragObject *DDIconView::<a href="qiconview.html#dragObject">dragObject</a>()
{
  return new <a href="qtextdrag.html">QTextDrag</a>( <a href="qiconview.html#currentItem">currentItem</a>()-&gt;text(), this );
}

void <a name="f1"></a>DDIconView::slotNewItem( <a href="qdropevent.html">QDropEvent</a> *evt, const <a href="qvaluelist.html">QValueList</a>&lt;QIconDragItem&gt;&amp; )
{
    <a href="qstring.html">QString</a> label;

    if ( QTextDrag::<a href="qtextdrag.html#decode">decode</a>( evt, label ) ) {
        DDIconViewItem *item = new DDIconViewItem( this, label );
<a name="x2495"></a>        item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );
    }
}



int main( int argc, char *argv[] )
{
    <a href="qapplication.html">QApplication</a> app( argc, argv );

    // Create and show the widgets
    <a href="qsplitter.html">QSplitter</a> *split = new <a href="qsplitter.html">QSplitter</a>();
    DDIconView *iv   = new DDIconView( split );
    (void)             new DDListBox( split );
    app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( split );
    split-&gt;<a href="qwidget.html#resize">resize</a>( 600, 400 );
    split-&gt;<a href="qwidget.html#show">show</a>();

    // Set up the connection so that we can drop items into the icon view
    QObject::<a href="qobject.html#connect">connect</a>(
<a name="x2492"></a>        iv, SIGNAL(<a href="qiconview.html#dropped">dropped</a>(QDropEvent*, const <a href="qvaluelist.html">QValueList</a>&lt;QIconDragItem&gt;&amp;)),
        iv, SLOT(slotNewItem(QDropEvent*, const <a href="qvaluelist.html">QValueList</a>&lt;QIconDragItem&gt;&amp;)));

    // Populate the QIconView with icons
    DDIconViewItem *item;
    item = new DDIconViewItem( iv, "Red",   QPixmap( red_icon ) );
    item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );
    item = new DDIconViewItem( iv, "Green", QPixmap( green_icon ) );
    item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );
    item = new DDIconViewItem( iv, "Blue",  QPixmap( blue_icon ) );
    item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );

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


</pre><!-- eof -->
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<td>Copyright &copy; 2001 
<a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a>
<td align=right><div align=right>Qt version 3.0.2</div>
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