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514 lines
21 KiB
514 lines
21 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/listviews/listviews.doc:4 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Listviews</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Grouped Classes</font></a>
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</td>
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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>Listviews</h1>
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<p>
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This examples shows how to work with listviews (hierarchical and multi-column).
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It also shows how to subclass listview items for special reasons. It looks
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and works like the main window of a mail client.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/listviews.h 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef LISTVIEWS_H
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#define LISTVIEWS_H
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#include <<a href="qsplitter-h.html">ntqsplitter.h</a>>
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#include <<a href="qstring-h.html">ntqstring.h</a>>
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#include <<a href="qobject-h.html">ntqobject.h</a>>
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#include <<a href="qdatetime-h.html">ntqdatetime.h</a>>
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#include <<a href="qptrlist-h.html">ntqptrlist.h</a>>
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#include <<a href="qlistview-h.html">ntqlistview.h</a>>
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class TQListView;
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class TQLabel;
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class TQPainter;
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class TQColorGroup;
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class TQObjectList;
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class TQPopupMenu;
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// -----------------------------------------------------------------
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class MessageHeader
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{
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public:
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MessageHeader( const <a href="ntqstring.html">TQString</a> &_sender, const <a href="ntqstring.html">TQString</a> &_subject, const <a href="ntqdatetime.html">TQDateTime</a> &_datetime )
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: msender( _sender ), msubject( _subject ), mdatetime( _datetime )
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{}
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MessageHeader( const MessageHeader &mh );
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MessageHeader &operator=( const MessageHeader &mh );
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<a href="ntqstring.html">TQString</a> sender() { return msender; }
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<a href="ntqstring.html">TQString</a> subject() { return msubject; }
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<a href="ntqdatetime.html">TQDateTime</a> datetime() { return mdatetime; }
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protected:
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<a href="ntqstring.html">TQString</a> msender, msubject;
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<a href="ntqdatetime.html">TQDateTime</a> mdatetime;
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};
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// -----------------------------------------------------------------
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class Message
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{
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public:
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enum State { Read = 0,
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Unread};
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Message( const MessageHeader &mh, const <a href="ntqstring.html">TQString</a> &_body )
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: mheader( mh ), mbody( _body ), mstate( Unread )
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{}
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Message( const Message &m )
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: mheader( m.mheader ), mbody( m.mbody ), mstate( m.mstate )
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{}
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MessageHeader header() { return mheader; }
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<a href="ntqstring.html">TQString</a> body() { return mbody; }
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void setState( const State &s ) { mstate = s; }
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State state() { return mstate; }
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protected:
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MessageHeader mheader;
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<a href="ntqstring.html">TQString</a> mbody;
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State mstate;
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};
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// -----------------------------------------------------------------
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class Folder : public <a href="ntqobject.html">TQObject</a>
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{
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<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
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public:
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Folder( Folder *parent, const <a href="ntqstring.html">TQString</a> &name );
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~Folder()
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{}
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void addMessage( Message *m )
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<a name="x131"></a> { lstMessages.<a href="ntqptrlist.html#append">append</a>( m ); }
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<a href="ntqstring.html">TQString</a> folderName() { return fName; }
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<a name="x132"></a> Message *firstMessage() { return lstMessages.<a href="ntqptrlist.html#first">first</a>(); }
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<a name="x133"></a> Message *nextMessage() { return lstMessages.<a href="ntqptrlist.html#next">next</a>(); }
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protected:
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<a href="ntqstring.html">TQString</a> fName;
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<a href="ntqptrlist.html">TQPtrList</a><Message> lstMessages;
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};
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// -----------------------------------------------------------------
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class FolderListItem : public <a href="qlistviewitem.html">TQListViewItem</a>
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{
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public:
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FolderListItem( <a href="ntqlistview.html">TQListView</a> *parent, Folder *f );
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FolderListItem( FolderListItem *parent, Folder *f );
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void insertSubFolders( const <a href="ntqobjectlist.html">TQObjectList</a> *lst );
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Folder *folder() { return myFolder; }
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protected:
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Folder *myFolder;
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};
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// -----------------------------------------------------------------
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class MessageListItem : public <a href="qlistviewitem.html">TQListViewItem</a>
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{
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public:
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MessageListItem( <a href="ntqlistview.html">TQListView</a> *parent, Message *m );
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virtual void paintCell( <a href="ntqpainter.html">TQPainter</a> *p, const <a href="qcolorgroup.html">TQColorGroup</a> &cg,
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int column, int width, int alignment );
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Message *message() { return myMessage; }
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protected:
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Message *myMessage;
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};
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// -----------------------------------------------------------------
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class ListViews : public <a href="ntqsplitter.html">TQSplitter</a>
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{
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TQ_OBJECT
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public:
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ListViews( <a href="ntqwidget.html">TQWidget</a> *parent = 0, const char *name = 0 );
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~ListViews()
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{}
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protected:
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void initFolders();
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void initFolder( Folder *folder, unsigned int &count );
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void setupFolders();
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<a href="ntqlistview.html">TQListView</a> *messages, *folders;
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<a href="ntqlabel.html">TQLabel</a> *message;
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<a href="ntqpopupmenu.html">TQPopupMenu</a>* menu;
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<a href="ntqptrlist.html">TQPtrList</a><Folder> lstFolders;
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protected slots:
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void slotFolderChanged( <a href="qlistviewitem.html">TQListViewItem</a>* );
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void slotMessageChanged();
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void slotRMB( <a href="qlistviewitem.html">TQListViewItem</a>*, const <a href="ntqpoint.html">TQPoint</a> &, int );
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};
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#endif
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/listviews.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "listviews.h"
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#include <<a href="qlabel-h.html">ntqlabel.h</a>>
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#include <<a href="qpainter-h.html">ntqpainter.h</a>>
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#include <<a href="qpalette-h.html">ntqpalette.h</a>>
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#include <<a href="qobjectlist-h.html">ntqobjectlist.h</a>>
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#include <<a href="qpopupmenu-h.html">ntqpopupmenu.h</a>>
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#include <<a href="qheader-h.html">ntqheader.h</a>>
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#include <<a href="qregexp-h.html">ntqregexp.h</a>>
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// -----------------------------------------------------------------
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MessageHeader::MessageHeader( const MessageHeader &mh )
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{
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msender = mh.msender;
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msubject = mh.msubject;
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mdatetime = mh.mdatetime;
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}
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MessageHeader &MessageHeader::operator=( const MessageHeader &mh )
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{
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msender = mh.msender;
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msubject = mh.msubject;
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mdatetime = mh.mdatetime;
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return *this;
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}
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// -----------------------------------------------------------------
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<a name="f208"></a>Folder::Folder( Folder *parent, const <a href="ntqstring.html">TQString</a> &name )
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: <a href="ntqobject.html">TQObject</a>( parent, name ), fName( name )
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{
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lstMessages.setAutoDelete( TRUE );
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}
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// -----------------------------------------------------------------
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<a name="f209"></a>FolderListItem::FolderListItem( <a href="ntqlistview.html">TQListView</a> *parent, Folder *f )
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: <a href="qlistviewitem.html">TQListViewItem</a>( parent )
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{
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myFolder = f;
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<a href="qlistviewitem.html#setText">setText</a>( 0, f->folderName() );
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if ( myFolder->children() )
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insertSubFolders( myFolder->children() );
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}
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FolderListItem::FolderListItem( FolderListItem *parent, Folder *f )
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: <a href="qlistviewitem.html">TQListViewItem</a>( parent )
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{
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myFolder = f;
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<a href="qlistviewitem.html#setText">setText</a>( 0, f->folderName() );
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if ( myFolder->children() )
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insertSubFolders( myFolder->children() );
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}
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void <a name="f210"></a>FolderListItem::insertSubFolders( const <a href="ntqobjectlist.html">TQObjectList</a> *lst )
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{
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Folder *f;
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for ( f = ( Folder* )( ( <a href="ntqobjectlist.html">TQObjectList</a>* )lst )->first(); f; f = ( Folder* )( ( <a href="ntqobjectlist.html">TQObjectList</a>* )lst )->next() )
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(void)new FolderListItem( this, f );
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}
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// -----------------------------------------------------------------
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<a name="f218"></a>MessageListItem::MessageListItem( <a href="ntqlistview.html">TQListView</a> *parent, Message *m )
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: <a href="qlistviewitem.html">TQListViewItem</a>( parent )
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{
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myMessage = m;
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<a href="qlistviewitem.html#setText">setText</a>( 0, myMessage->header().sender() );
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<a href="qlistviewitem.html#setText">setText</a>( 1, myMessage->header().subject() );
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<a href="qlistviewitem.html#setText">setText</a>( 2, myMessage->header().datetime().toString() );
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}
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<a name="x157"></a>void MessageListItem::<a href="qlistviewitem.html#paintCell">paintCell</a>( <a href="ntqpainter.html">TQPainter</a> *p, const <a href="qcolorgroup.html">TQColorGroup</a> &cg,
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int column, int width, int alignment )
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{
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<a href="qcolorgroup.html">TQColorGroup</a> _cg( cg );
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<a name="x135"></a> <a href="ntqcolor.html">TQColor</a> c = _cg.<a href="qcolorgroup.html#text">text</a>();
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if ( myMessage->state() == Message::Unread )
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<a name="x134"></a> _cg.<a href="qcolorgroup.html#setColor">setColor</a>( TQColorGroup::Text, TQt::red );
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TQListViewItem::<a href="qlistviewitem.html#paintCell">paintCell</a>( p, _cg, column, width, alignment );
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_cg.<a href="qcolorgroup.html#setColor">setColor</a>( TQColorGroup::Text, c );
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}
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// -----------------------------------------------------------------
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<a name="f211"></a>ListViews::ListViews( <a href="ntqwidget.html">TQWidget</a> *parent, const char *name )
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: <a href="ntqsplitter.html">TQSplitter</a>( TQt::Horizontal, parent, name )
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{
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lstFolders.setAutoDelete( TRUE );
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folders = new <a href="ntqlistview.html">TQListView</a>( this );
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<a name="x147"></a> folders-><a href="ntqlistview.html#header">header</a>()->setClickEnabled( FALSE );
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<a name="x141"></a> folders-><a href="ntqlistview.html#addColumn">addColumn</a>( "Folder" );
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initFolders();
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setupFolders();
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<a name="x152"></a> folders-><a href="ntqlistview.html#setRootIsDecorated">setRootIsDecorated</a>( TRUE );
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<a href="ntqsplitter.html#setResizeMode">setResizeMode</a>( folders, TQSplitter::KeepSize );
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<a href="ntqsplitter.html">TQSplitter</a> *vsplitter = new <a href="ntqsplitter.html">TQSplitter</a>( TQt::Vertical, this );
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messages = new <a href="ntqlistview.html">TQListView</a>( vsplitter );
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messages-><a href="ntqlistview.html#addColumn">addColumn</a>( "Sender" );
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messages-><a href="ntqlistview.html#addColumn">addColumn</a>( "Subject" );
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messages-><a href="ntqlistview.html#addColumn">addColumn</a>( "Date" );
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<a name="x150"></a> messages-><a href="ntqlistview.html#setColumnAlignment">setColumnAlignment</a>( 1, TQt::AlignRight );
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<a name="x149"></a> messages-><a href="ntqlistview.html#setAllColumnsShowFocus">setAllColumnsShowFocus</a>( TRUE );
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<a name="x155"></a> messages-><a href="ntqlistview.html#setShowSortIndicator">setShowSortIndicator</a>( TRUE );
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menu = new <a href="ntqpopupmenu.html">TQPopupMenu</a>( messages );
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for( int i = 1; i <= 10; i++ )
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menu-><a href="ntqmenudata.html#insertItem">insertItem</a>( TQString( "Context Item %1" ).arg( i ) );
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<a name="x143"></a> <a href="ntqobject.html#connect">connect</a>(messages, TQ_SIGNAL( <a href="ntqlistview.html#contextMenuRequested">contextMenuRequested</a>( <a href="qlistviewitem.html">TQListViewItem</a> *, const <a href="ntqpoint.html">TQPoint</a>& , int ) ),
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this, TQ_SLOT( slotRMB( <a href="qlistviewitem.html">TQListViewItem</a> *, const <a href="ntqpoint.html">TQPoint</a> &, int ) ) );
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<a name="x161"></a> vsplitter-><a href="ntqsplitter.html#setResizeMode">setResizeMode</a>( messages, TQSplitter::KeepSize );
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message = new <a href="ntqlabel.html">TQLabel</a>( vsplitter );
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message-><a href="ntqlabel.html#setAlignment">setAlignment</a>( TQt::AlignTop );
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<a name="x163"></a> message-><a href="ntqwidget.html#setBackgroundMode">setBackgroundMode</a>( PaletteBase );
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<a name="x148"></a> <a href="ntqobject.html#connect">connect</a>( folders, TQ_SIGNAL( <a href="ntqlistview.html#selectionChanged">selectionChanged</a>( <a href="qlistviewitem.html">TQListViewItem</a>* ) ),
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this, TQ_SLOT( slotFolderChanged( <a href="qlistviewitem.html">TQListViewItem</a>* ) ) );
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<a href="ntqobject.html#connect">connect</a>( messages, TQ_SIGNAL( <a href="ntqlistview.html#selectionChanged">selectionChanged</a>() ),
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this, TQ_SLOT( slotMessageChanged() ) );
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<a name="x144"></a> <a href="ntqobject.html#connect">connect</a>( messages, TQ_SIGNAL( <a href="ntqlistview.html#currentChanged">currentChanged</a>( <a href="qlistviewitem.html">TQListViewItem</a> * ) ),
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this, TQ_SLOT( slotMessageChanged() ) );
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<a name="x154"></a> messages-><a href="ntqlistview.html#setSelectionMode">setSelectionMode</a>( TQListView::Extended );
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// some preparations
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<a name="x146"></a> folders-><a href="ntqlistview.html#firstChild">firstChild</a>()->setOpen( TRUE );
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folders-><a href="ntqlistview.html#firstChild">firstChild</a>()->firstChild()->setOpen( TRUE );
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<a name="x151"></a> folders-><a href="ntqlistview.html#setCurrentItem">setCurrentItem</a>( folders-><a href="ntqlistview.html#firstChild">firstChild</a>()->firstChild()->firstChild() );
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<a name="x153"></a> folders-><a href="ntqlistview.html#setSelected">setSelected</a>( folders-><a href="ntqlistview.html#firstChild">firstChild</a>()->firstChild()->firstChild(), TRUE );
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messages-><a href="ntqlistview.html#setSelected">setSelected</a>( messages-><a href="ntqlistview.html#firstChild">firstChild</a>(), TRUE );
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messages-><a href="ntqlistview.html#setCurrentItem">setCurrentItem</a>( messages-><a href="ntqlistview.html#firstChild">firstChild</a>() );
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message-><a href="ntqframe.html#setMargin">setMargin</a>( 5 );
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<a href="ntqvaluelist.html">TQValueList</a><int> lst;
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<a name="x160"></a> lst.<a href="ntqptrlist.html#append">append</a>( 170 );
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<a href="ntqsplitter.html#setSizes">setSizes</a>( lst );
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}
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void <a name="f212"></a>ListViews::initFolders()
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{
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unsigned int mcount = 1;
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for ( unsigned int i = 1; i < 20; i++ ) {
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<a href="ntqstring.html">TQString</a> str;
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str = TQString( "Folder %1" ).arg( i );
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Folder *f = new Folder( 0, str );
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for ( unsigned int j = 1; j < 5; j++ ) {
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<a href="ntqstring.html">TQString</a> str2;
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str2 = TQString( "Sub Folder %1" ).arg( j );
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Folder *f2 = new Folder( f, str2 );
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for ( unsigned int k = 1; k < 3; k++ ) {
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<a href="ntqstring.html">TQString</a> str3;
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str3 = TQString( "Sub Sub Folder %1" ).arg( k );
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Folder *f3 = new Folder( f2, str3 );
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initFolder( f3, mcount );
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}
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}
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lstFolders.append( f );
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}
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}
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void <a name="f213"></a>ListViews::initFolder( Folder *folder, unsigned int &count )
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{
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for ( unsigned int i = 0; i < 15; i++, count++ ) {
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<a href="ntqstring.html">TQString</a> str;
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str = TQString( "Message %1 " ).arg( count );
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<a name="x137"></a> <a href="ntqdatetime.html">TQDateTime</a> dt = TQDateTime::<a href="ntqdatetime.html#currentDateTime">currentDateTime</a>();
|
|
<a name="x136"></a> dt = dt.<a href="ntqdatetime.html#addSecs">addSecs</a>( 60 * count );
|
|
MessageHeader mh( "Trolltech <info@trolltech.com> ", str, dt );
|
|
|
|
<a href="ntqstring.html">TQString</a> body;
|
|
body = TQString( "This is the message number %1 of this application, \n"
|
|
"which shows how to use TQListViews, TQListViewItems, \n"
|
|
"TQSplitters and so on. The code should show how easy\n"
|
|
"this can be done in TQt." ).arg( count );
|
|
Message *msg = new Message( mh, body );
|
|
folder->addMessage( msg );
|
|
}
|
|
}
|
|
|
|
void <a name="f214"></a>ListViews::setupFolders()
|
|
{
|
|
<a name="x142"></a> folders-><a href="ntqlistview.html#clear">clear</a>();
|
|
|
|
for ( Folder* f = lstFolders.first(); f; f = lstFolders.next() )
|
|
(void)new FolderListItem( folders, f );
|
|
}
|
|
|
|
void <a name="f215"></a>ListViews::slotRMB( <a href="qlistviewitem.html">TQListViewItem</a>* Item, const <a href="ntqpoint.html">TQPoint</a> & point, int )
|
|
{
|
|
if( Item )
|
|
<a name="x159"></a> menu-><a href="ntqpopupmenu.html#popup">popup</a>( point );
|
|
}
|
|
|
|
|
|
void <a name="f216"></a>ListViews::slotFolderChanged( <a href="qlistviewitem.html">TQListViewItem</a> *i )
|
|
{
|
|
if ( !i )
|
|
return;
|
|
messages-><a href="ntqlistview.html#clear">clear</a>();
|
|
<a name="x140"></a> message-><a href="ntqlabel.html#setText">setText</a>( "" );
|
|
|
|
FolderListItem *item = ( FolderListItem* )i;
|
|
|
|
for ( Message* msg = item->folder()->firstMessage(); msg;
|
|
msg = item->folder()->nextMessage() )
|
|
(void)new MessageListItem( messages, msg );
|
|
}
|
|
|
|
void <a name="f217"></a>ListViews::slotMessageChanged()
|
|
{
|
|
<a name="x145"></a> <a href="qlistviewitem.html">TQListViewItem</a> *i = messages-><a href="ntqlistview.html#currentItem">currentItem</a>();
|
|
if ( !i )
|
|
return;
|
|
|
|
<a name="x156"></a> if ( !i-><a href="qlistviewitem.html#isSelected">isSelected</a>() ) {
|
|
message-><a href="ntqlabel.html#setText">setText</a>( "" );
|
|
return;
|
|
}
|
|
|
|
MessageListItem *item = ( MessageListItem* )i;
|
|
Message *msg = item->message();
|
|
|
|
<a href="ntqstring.html">TQString</a> text;
|
|
<a href="ntqstring.html">TQString</a> tmp = msg->header().sender();
|
|
<a name="x162"></a> tmp = tmp.<a href="ntqstring.html#replace">replace</a>( "<", "&lt;" );
|
|
tmp = tmp.<a href="ntqstring.html#replace">replace</a>( ">", "&gt;" );
|
|
text = TQString( "<b><i>From:</i></b> <a href=\"mailto:info@trolltech.com\">%1</a><br>"
|
|
"<b><i>Subject:</i></b> <big><big><b>%2</b></big></big><br>"
|
|
"<b><i>Date:</i></b> %3<br><br>"
|
|
"%4" ).
|
|
arg( tmp ).arg( msg->header().subject() ).
|
|
arg( msg->header().datetime().toString() ).arg( msg->body() );
|
|
|
|
message-><a href="ntqlabel.html#setText">setText</a>( text );
|
|
|
|
msg->setState( Message::Read );
|
|
}
|
|
</pre>
|
|
|
|
<p> <hr>
|
|
<p> Main:
|
|
<p> <pre>/****************************************************************************
|
|
** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
|
|
**
|
|
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
|
|
**
|
|
** This file is part of an example program for TQt. This example
|
|
** program may be used, distributed and modified without limitation.
|
|
**
|
|
*****************************************************************************/
|
|
|
|
#include "listviews.h"
|
|
#include <<a href="qapplication-h.html">ntqapplication.h</a>>
|
|
|
|
int main( int argc, char **argv )
|
|
{
|
|
<a href="ntqapplication.html">TQApplication</a> a( argc, argv );
|
|
|
|
ListViews listViews;
|
|
<a name="x166"></a> listViews.<a href="ntqwidget.html#resize">resize</a>( 640, 480 );
|
|
<a name="x167"></a> listViews.<a href="ntqwidget.html#setCaption">setCaption</a>( "TQt Example - Listview" );
|
|
a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( &listViews );
|
|
listViews.<a href="ntqwidget.html#show">show</a>();
|
|
|
|
return a.<a href="ntqapplication.html#exec">exec</a>();
|
|
}
|
|
</pre>
|
|
|
|
<p>See also <a href="examples.html">Examples</a>.
|
|
|
|
<!-- eof -->
|
|
<p><address><hr><div align=center>
|
|
<table width=100% cellspacing=0 border=0><tr>
|
|
<td>Copyright © 2007
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
|
</table></div></address></body>
|
|
</html>
|