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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/examples/action/actiongroup/actiongroup.doc:4 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>A Tiny Example Featuring QActionGroup</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>A Tiny Example Featuring QActionGroup</h1> <p> <p> This example program shows how to use anexclusive action group.<p> Detailed explanations of the code can be found in the<a href="actiongroup.html">walkthrough</a>.<p> <hr><p> Main:<p> <pre>/*$Id$*/#include <<a href="qapplication-h.html">qapplication.h</a>>#include "editor.h"int main( int argc, char ** argv){ <a href="qapplication.html">QApplication</a> app( argc, argv ); Editor editor; editor.<a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Actiongroup" ); app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &editor );<a name="x1051"></a> editor.<a href="qwidget.html#show">show</a>(); return app.<a href="qapplication.html#exec">exec</a>();}</pre><p> <hr><p> Header file:<p> <pre>/*$Id$*/#ifndef EDITOR_H#define EDITOR_H#include <<a href="qmainwindow-h.html">qmainwindow.h</a>>class QTextEdit;class QAction;class Editor : public <a href="qmainwindow.html">QMainWindow</a>{ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>public: Editor();private slots: void setFontColor( <a href="qaction.html">QAction</a> * );private: <a href="qtextedit.html">QTextEdit</a> * editor; <a href="qaction.html">QAction</a> * setRedFont;};#endif</pre><p> <hr><p> Implementation:<p> <pre>/*$Id$*//* XPM */static const char * black_xpm[] = {"32 32 2 1"," c None",". c #020202","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................","................................"};/* XPM */static const char * red_xpm[] = {"32 32 6 1"," c None",". c #EE0928","+ c #EF0928","@ c #EE0A29","# c #EE0B2A","$ c #ED0C2B","........................+.......",".+.++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++.+++++++++++++++++++++.",".++++++++++++++++++++++++++++++.","+++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++.+++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++.+++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.",".++++++++++++++++++++++++++++++@",".+++++++++++++++++++++++++++++.#",".+++++++++++++++++++++++++.+++.$",".+++++++++++++++++++++++++++++#$",".+++++++++++++++++++++++++++++.#",".+++++++++++++++++++++++++++++.#",".++++++++.+++++++++++++++++++++@",".++++++.+++++++++++++++++++++++.",".++++++++++++++++++++++++++++++.","..........+.............+......."};#include "editor.h"#include <<a href="qtextedit-h.html">qtextedit.h</a>>#include <<a href="qmenubar-h.html">qmenubar.h</a>>#include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>>#include <<a href="qtoolbar-h.html">qtoolbar.h</a>>#include <<a href="qaction-h.html">qaction.h</a>><a name="f358"></a>Editor::Editor() : <a href="qmainwindow.html">QMainWindow</a>( 0, "main window"){ <a href="qactiongroup.html">QActionGroup</a> * colors = new <a href="qactiongroup.html">QActionGroup</a>( this, "colors", TRUE ); <a href="qaction.html">QAction</a> * setBlackFont = new <a href="qaction.html">QAction</a>( "black", QPixmap( (const char**)black_xpm ), "Font color: black", CTRL+Key_B, colors, "blackfontcolor", TRUE ); setRedFont = new <a href="qaction.html">QAction</a>( "red", QPixmap( (const char**)red_xpm ), "Font color: red", CTRL+Key_R, colors, "redfontcolor", TRUE );<a name="x1054"></a> QObject::<a href="qobject.html#connect">connect</a>( colors, SIGNAL( <a href="qactiongroup.html#selected">selected</a>( <a href="qaction.html">QAction</a> * ) ), this, SLOT( setFontColor( <a href="qaction.html">QAction</a> * ) ) ); <a href="qtoolbar.html">QToolBar</a> * toolbar = new <a href="qtoolbar.html">QToolBar</a>( this, "toolbar" );<a name="x1053"></a> colors-><a href="qactiongroup.html#addTo">addTo</a>( toolbar ); <a href="qpopupmenu.html">QPopupMenu</a> * font = new <a href="qpopupmenu.html">QPopupMenu</a>( this ); <a href="qmainwindow.html#menuBar">menuBar</a>()->insertItem( "&Font", font );<a name="x1056"></a> colors-><a href="qactiongroup.html#setUsesDropDown">setUsesDropDown</a>( TRUE );<a name="x1055"></a> colors-><a href="qaction.html#setMenuText">setMenuText</a>( "Font Color" ); colors-><a href="qactiongroup.html#addTo">addTo</a>( font ); editor = new <a href="qtextedit.html">QTextEdit</a>( this, "editor" ); <a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>( editor );}void <a name="f359"></a>Editor::setFontColor( <a href="qaction.html">QAction</a> * coloraction ){ if ( coloraction == setRedFont )<a name="x1058"></a> editor-><a href="qtextedit.html#setColor">setColor</a>( red ); else editor-><a href="qtextedit.html#setColor">setColor</a>( black );}</pre><p>See also <a href="qaction-examples.html">QAction Examples</a>.<!-- 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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