iconview-simple_dd-main-cpp.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/src/iconview/qiconview.cpp:2181 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>iconview/simple_dd/main.cpp Example File</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">Home</font></a> | <a href="classes.html"><font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><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="x2676"></a>void DDListBox::<a href="qwidget.html#dragEnterEvent">dragEnterEvent</a>( <a href="qdragenterevent.html">QDragEnterEvent</a> *evt ){<a name="x2674"></a> if ( QTextDrag::<a href="qtextdrag.html#canDecode">canDecode</a>( evt ) )<a name="x2666"></a> evt-><a href="qdragmoveevent.html#accept">accept</a>();}<a name="x2677"></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="x2675"></a> if ( QTextDrag::<a href="qtextdrag.html#decode">decode</a>( evt, text ) ) <a href="qlistbox.html#insertItem">insertItem</a>( text );}<a name="x2679"></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="x2678"></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="x2665"></a> d-><a href="qdragobject.html#dragCopy">dragCopy</a>(); // do NOT delete d. dragging = FALSE; }}// IconViewIcon -- high level drag and drop<a name="x2669"></a>bool DDIconViewItem::<a href="qiconviewitem.html#acceptDrop">acceptDrop</a>( const <a href="qmimesource.html">QMimeSource</a> *mime ) const{<a name="x2672"></a> if ( mime-><a href="qmimesource.html#provides">provides</a>( "text/plain" ) ) return TRUE; return FALSE;}<a name="x2670"></a>void DDIconViewItem::<a href="qiconviewitem.html#dropped">dropped</a>( <a href="qdropevent.html">QDropEvent</a> *evt, const <a href="qvaluelist.html">QValueList</a><QIconDragItem>& ){ <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="x2667"></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>()->text(), this );}void <a name="f1"></a>DDIconView::slotNewItem( <a href="qdropevent.html">QDropEvent</a> *evt, const <a href="qvaluelist.html">QValueList</a><QIconDragItem>& ){ <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="x2671"></a> item-><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-><a href="qwidget.html#resize">resize</a>( 600, 400 ); split-><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="x2668"></a> iv, SIGNAL(<a href="qiconview.html#dropped">dropped</a>(QDropEvent*, const <a href="qvaluelist.html">QValueList</a><QIconDragItem>&)), iv, SLOT(slotNewItem(QDropEvent*, const <a href="qvaluelist.html">QValueList</a><QIconDragItem>&))); // Populate the QIconView with icons DDIconViewItem *item; item = new DDIconViewItem( iv, "Red", QPixmap( red_icon ) ); item-><a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE ); item = new DDIconViewItem( iv, "Green", QPixmap( green_icon ) ); item-><a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE ); item = new DDIconViewItem( iv, "Blue", QPixmap( blue_icon ) ); item-><a href="qiconviewitem.html#setRenameEnabled">setRenameEnabled</a>( TRUE ); return app.<a href="qapplication.html#exec">exec</a>();}</pre><!-- eof --><p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright © 2002 <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 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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