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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Toolkit - listviews/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: white; color: black; }--></style></head><body bgcolor="#ffffff"><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b> <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><h1 align=center>Listviews</h1><br clear="all"> This examples shows how to work with Listviews (hierarchical and multi-column). It also shows how to subclass Listview Items for special reasons. It looks and works like the mainwindow of a mail client. <hr> Header file: <pre>/****************************************************************************** $Id: qt/examples/listviews/listviews.h 2.3.8 edited 2004-05-12 $**** Copyright (C) 1992-2000 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.*******************************************************************************/#ifndef LISTVIEWS_H#define LISTVIEWS_H#include <<a href="qsplitter-h.html">qsplitter.h</a>>#include <<a href="qstring-h.html">qstring.h</a>>#include <<a href="qobject-h.html">qobject.h</a>>#include <<a href="qdatetime-h.html">qdatetime.h</a>>#include <<a href="qlist-h.html">qlist.h</a>>#include <<a href="qlistview-h.html">qlistview.h</a>>class QListView;class QLabel;class QPainter;class QColorGroup;class QObjectList;class QPopupMenu;// -----------------------------------------------------------------class MessageHeader{public: MessageHeader( const QString &_sender, const QString &_subject, const QDateTime &_datetime ) : msender( _sender ), msubject( _subject ), mdatetime( _datetime ) {} MessageHeader( const MessageHeader &mh ); MessageHeader &operator=( const MessageHeader &mh ); <a href="qstring.html">QString</a> sender() { return msender; } <a href="qstring.html">QString</a> subject() { return msubject; } <a href="qdatetime.html">QDateTime</a> datetime() { return mdatetime; }protected: <a href="qstring.html">QString</a> msender, msubject; <a href="qdatetime.html">QDateTime</a> mdatetime;};// -----------------------------------------------------------------class Message{public: enum State { Read = 0, Unread}; Message( const MessageHeader &mh, const QString &_body ) : mheader( mh ), mbody( _body ), mstate( Unread ) {} Message( const Message &m ) : mheader( m.mheader ), mbody( m.mbody ), mstate( m.mstate ) {} MessageHeader header() { return mheader; } <a href="qstring.html">QString</a> body() { return mbody; } void setState( const State &s ) { mstate = s; } State state() { return mstate; }protected: MessageHeader mheader; <a href="qstring.html">QString</a> mbody; State mstate;};// -----------------------------------------------------------------class Folder : public QObject{ Q_OBJECTpublic: Folder( Folder *parent, const QString &name ); ~Folder() {} void addMessage( Message *m ) { lstMessages.<a href="qlist.html#c5746a">append</a>( m ); } <a href="qstring.html">QString</a> folderName() { return fName; } Message *firstMessage() { return lstMessages.<a href="qlist.html#e625f9">first</a>(); } Message *nextMessage() { return lstMessages.<a href="qlist.html#f95ddd">next</a>(); }protected: <a href="qstring.html">QString</a> fName; <a href="qlist.html">QList</a><Message> lstMessages;};// -----------------------------------------------------------------class FolderListItem : public QListViewItem{public: FolderListItem( <a href="qlistview.html">QListView</a> *parent, Folder *f ); FolderListItem( FolderListItem *parent, Folder *f ); void insertSubFolders( const QObjectList *lst ); Folder *folder() { return myFolder; }protected: Folder *myFolder;};// -----------------------------------------------------------------class MessageListItem : public QListViewItem{public: MessageListItem( <a href="qlistview.html">QListView</a> *parent, Message *m ); virtual void paintCell( <a href="qpainter.html">QPainter</a> *p, const QColorGroup &cg, int column, int width, int alignment ); Message *message() { return myMessage; }protected: Message *myMessage;};// -----------------------------------------------------------------class ListViews : public QSplitter{ Q_OBJECTpublic: ListViews( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0 ); ~ListViews() {}protected: void initFolders(); void initFolder( Folder *folder, unsigned int &count ); void setupFolders(); <a href="qlistview.html">QListView</a> *messages, *folders; <a href="qlabel.html">QLabel</a> *message; <a href="qpopupmenu.html">QPopupMenu</a>* menu; <a href="qlist.html">QList</a><Folder> lstFolders;protected slots: void slotFolderChanged( <a href="qlistviewitem.html">QListViewItem</a>* ); void slotMessageChanged(); void slotRMB( <a href="qlistviewitem.html">QListViewItem</a>*, const QPoint &, int );};#endif</pre> <hr> Implementation: <pre>/****************************************************************************** $Id: qt/examples/listviews/listviews.cpp 2.3.8 edited 2004-05-12 $**** Copyright (C) 1992-2000 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 "listviews.h"#include <<a href="qlabel-h.html">qlabel.h</a>>#include <<a href="qpainter-h.html">qpainter.h</a>>#include <<a href="qpalette-h.html">qpalette.h</a>>#include <qobjectlist.h>#include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>>#include <<a href="qheader-h.html">qheader.h</a>>#include <<a href="qregexp-h.html">qregexp.h</a>>// -----------------------------------------------------------------MessageHeader::MessageHeader( const MessageHeader &mh ){ msender = mh.msender; msubject = mh.msubject; mdatetime = mh.mdatetime;}MessageHeader &MessageHeader::operator=( const MessageHeader &mh ){ msender = mh.msender; msubject = mh.msubject; mdatetime = mh.mdatetime; return *this;}// -----------------------------------------------------------------Folder::Folder( Folder *parent, const QString &name ) : <a href="qobject.html">QObject</a>( parent, name ), fName( name ){ lstMessages.setAutoDelete( TRUE );⌨️ 快捷键说明
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