source: trunk/doc/html/iconview-simple_dd-main-cpp.html

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2<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/iconview/qiconview.cpp:2258 -->
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6<title>iconview/simple_dd/main.cpp Example File</title>
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32<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>
33
34
35<pre>/****************************************************************************
36** $Id: iconview-simple_dd-main-cpp.html 2051 2007-02-21 10:04:20Z chehrlic $
37**
38** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
39**
40** This file is part of an example program for Qt. This example
41** program may be used, distributed and modified without limitation.
42**
43*****************************************************************************/
44
45#include "main.h"
46
47const char* red_icon[]={
48"16 16 2 1",
49"r c red",
50". c None",
51"................",
52"................",
53"..rrrrrrrrrrrr..",
54"..rrrrrrrrrrrr..",
55"..rrrrrrrrrrrr..",
56"..rrr......rrr..",
57"..rrr......rrr..",
58"..rrr......rrr..",
59"..rrr......rrr..",
60"..rrr......rrr..",
61"..rrr......rrr..",
62"..rrrrrrrrrrrr..",
63"..rrrrrrrrrrrr..",
64"..rrrrrrrrrrrr..",
65"................",
66"................"};
67
68const char* blue_icon[]={
69"16 16 2 1",
70"b c blue",
71". c None",
72"................",
73"................",
74"..bbbbbbbbbbbb..",
75"..bbbbbbbbbbbb..",
76"..bbbbbbbbbbbb..",
77"..bbb......bbb..",
78"..bbb......bbb..",
79"..bbb......bbb..",
80"..bbb......bbb..",
81"..bbb......bbb..",
82"..bbb......bbb..",
83"..bbbbbbbbbbbb..",
84"..bbbbbbbbbbbb..",
85"..bbbbbbbbbbbb..",
86"................",
87"................"};
88
89const char* green_icon[]={
90"16 16 2 1",
91"g c green",
92". c None",
93"................",
94"................",
95"..gggggggggggg..",
96"..gggggggggggg..",
97"..gggggggggggg..",
98"..ggg......ggg..",
99"..ggg......ggg..",
100"..ggg......ggg..",
101"..ggg......ggg..",
102"..ggg......ggg..",
103"..ggg......ggg..",
104"..gggggggggggg..",
105"..gggggggggggg..",
106"..gggggggggggg..",
107"................",
108"................"};
109
110
111// ListBox -- low level drag and drop
112
113<a name="f2"></a>DDListBox::DDListBox( <a href="qwidget.html">QWidget</a> * parent, const char * name, WFlags f ) :
114 <a href="qlistbox.html">QListBox</a>( parent, name, f )
115{
116 <a href="qwidget.html#setAcceptDrops">setAcceptDrops</a>( TRUE );
117 dragging = FALSE;
118}
119
120
121<a name="x2829"></a>void DDListBox::<a href="qwidget.html#dragEnterEvent">dragEnterEvent</a>( <a href="qdragenterevent.html">QDragEnterEvent</a> *evt )
122{
123<a name="x2827"></a> if ( QTextDrag::<a href="qtextdrag.html#canDecode">canDecode</a>( evt ) )
124<a name="x2819"></a> evt-&gt;<a href="qdragmoveevent.html#accept">accept</a>();
125}
126
127
128<a name="x2830"></a>void DDListBox::<a href="qwidget.html#dropEvent">dropEvent</a>( <a href="qdropevent.html">QDropEvent</a> *evt )
129{
130 <a href="qstring.html">QString</a> text;
131
132<a name="x2828"></a> if ( QTextDrag::<a href="qtextdrag.html#decode">decode</a>( evt, text ) )
133 <a href="qlistbox.html#insertItem">insertItem</a>( text );
134}
135
136
137<a name="x2832"></a>void DDListBox::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *evt )
138{
139 QListBox::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( evt );
140 dragging = TRUE;
141}
142
143
144<a name="x2831"></a>void DDListBox::<a href="qwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> * )
145{
146 if ( dragging ) {
147 <a href="qdragobject.html">QDragObject</a> *d = new <a href="qtextdrag.html">QTextDrag</a>( currentText(), this );
148<a name="x2818"></a> d-&gt;<a href="qdragobject.html#dragCopy">dragCopy</a>(); // do NOT delete d.
149 dragging = FALSE;
150 }
151}
152
153
154// IconViewIcon -- high level drag and drop
155
156
157<a name="x2822"></a>bool DDIconViewItem::<a href="qiconviewitem.html#acceptDrop">acceptDrop</a>( const <a href="qmimesource.html">QMimeSource</a> *mime ) const
158{
159<a name="x2825"></a> if ( mime-&gt;<a href="qmimesource.html#provides">provides</a>( "text/plain" ) )
160 return TRUE;
161 return FALSE;
162}
163
164
165<a name="x2823"></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; )
166{
167 <a href="qstring.html">QString</a> label;
168
169 if ( QTextDrag::<a href="qtextdrag.html#decode">decode</a>( evt, label ) )
170 setText( label );
171}
172
173
174// IconView -- high level drag and drop
175
176<a name="x2820"></a>QDragObject *DDIconView::<a href="qiconview.html#dragObject">dragObject</a>()
177{
178 return new <a href="qtextdrag.html">QTextDrag</a>( <a href="qiconview.html#currentItem">currentItem</a>()-&gt;text(), this );
179}
180
181void <a name="f1"></a>DDIconView::slotNewItem( <a href="qdropevent.html">QDropEvent</a> *evt, const <a href="qvaluelist.html">QValueList</a>&lt;QIconDragItem&gt;&amp; )
182{
183 <a href="qstring.html">QString</a> label;
184
185 if ( QTextDrag::<a href="qtextdrag.html#decode">decode</a>( evt, label ) ) {
186 DDIconViewItem *item = new DDIconViewItem( this, label );
187<a name="x2824"></a> item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );
188 }
189}
190
191
192
193int main( int argc, char *argv[] )
194{
195 <a href="qapplication.html">QApplication</a> app( argc, argv );
196
197 // Create and show the widgets
198 <a href="qsplitter.html">QSplitter</a> *split = new <a href="qsplitter.html">QSplitter</a>();
199 DDIconView *iv = new DDIconView( split );
200 (void) new DDListBox( split );
201 app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( split );
202 split-&gt;<a href="qwidget.html#resize">resize</a>( 600, 400 );
203 split-&gt;<a href="qwidget.html#show">show</a>();
204
205 // Set up the connection so that we can drop items into the icon view
206 QObject::<a href="qobject.html#connect">connect</a>(
207<a name="x2821"></a> iv, SIGNAL(<a href="qiconview.html#dropped">dropped</a>(QDropEvent*, const <a href="qvaluelist.html">QValueList</a>&lt;QIconDragItem&gt;&amp;)),
208 iv, SLOT(slotNewItem(QDropEvent*, const <a href="qvaluelist.html">QValueList</a>&lt;QIconDragItem&gt;&amp;)));
209
210 // Populate the QIconView with icons
211 DDIconViewItem *item;
212 item = new DDIconViewItem( iv, "Red", QPixmap( red_icon ) );
213 item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );
214 item = new DDIconViewItem( iv, "Green", QPixmap( green_icon ) );
215 item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );
216 item = new DDIconViewItem( iv, "Blue", QPixmap( blue_icon ) );
217 item-&gt;<a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE );
218
219 return app.<a href="qapplication.html#exec">exec</a>();
220}
221
222
223</pre><!-- eof -->
224<p><address><hr><div align=center>
225<table width=100% cellspacing=0 border=0><tr>
226<td>Copyright &copy; 2007
227<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
228<td align=right><div align=right>Qt 3.3.8</div>
229</table></div></address></body>
230</html>
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