listviews-example.html

来自「QT 下载资料仅供参考」· HTML 代码 · 共 514 行 · 第 1/2 页

// -----------------------------------------------------------------

<a name="f190"></a>FolderListItem::FolderListItem( <a href="qlistview.html">QListView</a> *parent, Folder *f )
    : <a href="qlistviewitem.html">QListViewItem</a>( parent )
{
    myFolder = f;
    <a href="qlistviewitem.html#setText">setText</a>( 0, f-&gt;folderName() );

    if ( myFolder-&gt;children() )
        insertSubFolders( myFolder-&gt;children() );
}

FolderListItem::FolderListItem( FolderListItem *parent, Folder *f )
    : <a href="qlistviewitem.html">QListViewItem</a>( parent )
{
    myFolder = f;

    <a href="qlistviewitem.html#setText">setText</a>( 0, f-&gt;folderName() );

    if ( myFolder-&gt;children() )
        insertSubFolders( myFolder-&gt;children() );
}

void <a name="f191"></a>FolderListItem::insertSubFolders( const <a href="qobjectlist.html">QObjectList</a> *lst )
{
    Folder *f;
    for ( f = ( Folder* )( ( <a href="qobjectlist.html">QObjectList</a>* )lst )-&gt;first(); f; f = ( Folder* )( ( <a href="qobjectlist.html">QObjectList</a>* )lst )-&gt;next() )
        (void)new FolderListItem( this, f );
}

// -----------------------------------------------------------------

<a name="f199"></a>MessageListItem::MessageListItem( <a href="qlistview.html">QListView</a> *parent, Message *m )
    : <a href="qlistviewitem.html">QListViewItem</a>( parent )
{
    myMessage = m;
    <a href="qlistviewitem.html#setText">setText</a>( 0, myMessage-&gt;header().sender() );
    <a href="qlistviewitem.html#setText">setText</a>( 1, myMessage-&gt;header().subject() );
    <a href="qlistviewitem.html#setText">setText</a>( 2, myMessage-&gt;header().datetime().toString() );
}

<a name="x344"></a>void MessageListItem::<a href="qlistviewitem.html#paintCell">paintCell</a>( <a href="qpainter.html">QPainter</a> *p, const <a href="qcolorgroup.html">QColorGroup</a> &amp;cg,
                                 int column, int width, int alignment )
{
    <a href="qcolorgroup.html">QColorGroup</a> _cg( cg );
<a name="x322"></a>    <a href="qcolor.html">QColor</a> c = _cg.<a href="qcolorgroup.html#text">text</a>();

    if ( myMessage-&gt;state() == Message::Unread )
<a name="x321"></a>        _cg.<a href="qcolorgroup.html#setColor">setColor</a>( QColorGroup::Text, Qt::red );

    QListViewItem::<a href="qlistviewitem.html#paintCell">paintCell</a>( p, _cg, column, width, alignment );

    _cg.<a href="qcolorgroup.html#setColor">setColor</a>( QColorGroup::Text, c );
}

// -----------------------------------------------------------------

<a name="f192"></a>ListViews::ListViews( <a href="qwidget.html">QWidget</a> *parent, const char *name )
    : <a href="qsplitter.html">QSplitter</a>( Qt::Horizontal, parent, name )
{
    lstFolders.setAutoDelete( TRUE );

    folders = new <a href="qlistview.html">QListView</a>( this );
<a name="x334"></a>    folders-&gt;<a href="qlistview.html#header">header</a>()-&gt;setClickEnabled( FALSE );
<a name="x328"></a>    folders-&gt;<a href="qlistview.html#addColumn">addColumn</a>( "Folder" );

    initFolders();
    setupFolders();

<a name="x339"></a>    folders-&gt;<a href="qlistview.html#setRootIsDecorated">setRootIsDecorated</a>( TRUE );
    <a href="qsplitter.html#setResizeMode">setResizeMode</a>( folders, QSplitter::KeepSize );

    <a href="qsplitter.html">QSplitter</a> *vsplitter = new <a href="qsplitter.html">QSplitter</a>( Qt::Vertical, this );

    messages = new <a href="qlistview.html">QListView</a>( vsplitter );
    messages-&gt;<a href="qlistview.html#addColumn">addColumn</a>( "Sender" );
    messages-&gt;<a href="qlistview.html#addColumn">addColumn</a>( "Subject" );
    messages-&gt;<a href="qlistview.html#addColumn">addColumn</a>( "Date" );
<a name="x337"></a>    messages-&gt;<a href="qlistview.html#setColumnAlignment">setColumnAlignment</a>( 1, Qt::AlignRight );
<a name="x336"></a>    messages-&gt;<a href="qlistview.html#setAllColumnsShowFocus">setAllColumnsShowFocus</a>( TRUE );
<a name="x342"></a>    messages-&gt;<a href="qlistview.html#setShowSortIndicator">setShowSortIndicator</a>( TRUE );
    menu = new <a href="qpopupmenu.html">QPopupMenu</a>( messages );
    for( int i = 1; i &lt;= 10; i++ )
        menu-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( QString( "Context Item %1" ).arg( i ) );
<a name="x330"></a>    <a href="qobject.html#connect">connect</a>(messages, SIGNAL( <a href="qlistview.html#contextMenuRequested">contextMenuRequested</a>( <a href="qlistviewitem.html">QListViewItem</a> *, const <a href="qpoint.html">QPoint</a>&amp; , int ) ),
            this, SLOT( slotRMB( <a href="qlistviewitem.html">QListViewItem</a> *, const <a href="qpoint.html">QPoint</a> &amp;, int ) ) );
<a name="x348"></a>    vsplitter-&gt;<a href="qsplitter.html#setResizeMode">setResizeMode</a>( messages, QSplitter::KeepSize );

    message = new <a href="qlabel.html">QLabel</a>( vsplitter );
<a name="x326"></a>    message-&gt;<a href="qlabel.html#setAlignment">setAlignment</a>( Qt::AlignTop );
<a name="x350"></a>    message-&gt;<a href="qwidget.html#setBackgroundMode">setBackgroundMode</a>( PaletteBase );

<a name="x335"></a>    <a href="qobject.html#connect">connect</a>( folders, SIGNAL( <a href="qlistview.html#selectionChanged">selectionChanged</a>( <a href="qlistviewitem.html">QListViewItem</a>* ) ),
             this, SLOT( slotFolderChanged( <a href="qlistviewitem.html">QListViewItem</a>* ) ) );
    <a href="qobject.html#connect">connect</a>( messages, SIGNAL( <a href="qlistview.html#selectionChanged">selectionChanged</a>() ),
             this, SLOT( slotMessageChanged() ) );
<a name="x331"></a>    <a href="qobject.html#connect">connect</a>( messages, SIGNAL( <a href="qlistview.html#currentChanged">currentChanged</a>( <a href="qlistviewitem.html">QListViewItem</a> * ) ),
             this, SLOT( slotMessageChanged() ) );

<a name="x341"></a>    messages-&gt;<a href="qlistview.html#setSelectionMode">setSelectionMode</a>( QListView::Extended );
    // some preperationes
<a name="x333"></a>    folders-&gt;<a href="qlistview.html#firstChild">firstChild</a>()-&gt;setOpen( TRUE );
    folders-&gt;<a href="qlistview.html#firstChild">firstChild</a>()-&gt;firstChild()-&gt;setOpen( TRUE );
<a name="x338"></a>    folders-&gt;<a href="qlistview.html#setCurrentItem">setCurrentItem</a>( folders-&gt;<a href="qlistview.html#firstChild">firstChild</a>()-&gt;firstChild()-&gt;firstChild() );
<a name="x340"></a>    folders-&gt;<a href="qlistview.html#setSelected">setSelected</a>( folders-&gt;<a href="qlistview.html#firstChild">firstChild</a>()-&gt;firstChild()-&gt;firstChild(), TRUE );

    messages-&gt;<a href="qlistview.html#setSelected">setSelected</a>( messages-&gt;<a href="qlistview.html#firstChild">firstChild</a>(), TRUE );
    messages-&gt;<a href="qlistview.html#setCurrentItem">setCurrentItem</a>( messages-&gt;<a href="qlistview.html#firstChild">firstChild</a>() );
    message-&gt;<a href="qframe.html#setMargin">setMargin</a>( 5 );

    <a href="qvaluelist.html">QValueList</a>&lt;int&gt; lst;
<a name="x347"></a>    lst.<a href="qptrlist.html#append">append</a>( 170 );
    <a href="qsplitter.html#setSizes">setSizes</a>( lst );
}

void <a name="f193"></a>ListViews::initFolders()
{
    unsigned int mcount = 1;

    for ( unsigned int i = 1; i &lt; 20; i++ ) {
        <a href="qstring.html">QString</a> str;
        str = QString( "Folder %1" ).arg( i );
        Folder *f = new Folder( 0, str );
        for ( unsigned int j = 1; j &lt; 5; j++ ) {
            <a href="qstring.html">QString</a> str2;
            str2 = QString( "Sub Folder %1" ).arg( j );
            Folder *f2 = new Folder( f, str2 );
            for ( unsigned int k = 1; k &lt; 3; k++ ) {
                <a href="qstring.html">QString</a> str3;
                str3 = QString( "Sub Sub Folder %1" ).arg( k );
                Folder *f3 = new Folder( f2, str3 );
                initFolder( f3, mcount );
            }
        }
        lstFolders.append( f );
    }
}

void <a name="f194"></a>ListViews::initFolder( Folder *folder, unsigned int &amp;count )
{
    for ( unsigned int i = 0; i &lt; 15; i++, count++ ) {
        <a href="qstring.html">QString</a> str;
        str = QString( "Message %1  " ).arg( count );
<a name="x324"></a>        <a href="qdatetime.html">QDateTime</a> dt = QDateTime::<a href="qdatetime.html#currentDateTime">currentDateTime</a>();
<a name="x323"></a>        dt = dt.<a href="qdatetime.html#addSecs">addSecs</a>( 60 * count );
        MessageHeader mh( "Trolltech &lt;[e-mail]&gt;  ", str, dt );

        <a href="qstring.html">QString</a> body;
        body = QString( "This is the message number %1 of this application, \n"
                        "which shows how to use QListViews, QListViewItems, \n"
                        "QSplitters and so on. The code should show how easy\n"
                        "this can be done in Qt." ).arg( count );
        Message *msg = new Message( mh, body );
        folder-&gt;addMessage( msg );
    }
}

void <a name="f195"></a>ListViews::setupFolders()
{
<a name="x329"></a>    folders-&gt;<a href="qlistview.html#clear">clear</a>();

    for ( Folder* f = lstFolders.first(); f; f = lstFolders.next() )
        (void)new FolderListItem( folders, f );
}

void <a name="f196"></a>ListViews::slotRMB( <a href="qlistviewitem.html">QListViewItem</a>* Item, const <a href="qpoint.html">QPoint</a> &amp; point, int )
{
    if( Item )
<a name="x346"></a>        menu-&gt;<a href="qpopupmenu.html#popup">popup</a>( point );
}


void <a name="f197"></a>ListViews::slotFolderChanged( <a href="qlistviewitem.html">QListViewItem</a> *i )
{
    if ( !i )
        return;
    messages-&gt;<a href="qlistview.html#clear">clear</a>();
<a name="x327"></a>    message-&gt;<a href="qlabel.html#setText">setText</a>( "" );

    FolderListItem *item = ( FolderListItem* )i;

    for ( Message* msg = item-&gt;folder()-&gt;firstMessage(); msg;
          msg = item-&gt;folder()-&gt;nextMessage() )
        (void)new MessageListItem( messages, msg );
}

void <a name="f198"></a>ListViews::slotMessageChanged()
{
<a name="x332"></a>    <a href="qlistviewitem.html">QListViewItem</a> *i = messages-&gt;<a href="qlistview.html#currentItem">currentItem</a>();
    if ( !i )
        return;

<a name="x343"></a>    if ( !i-&gt;<a href="qlistviewitem.html#isSelected">isSelected</a>() ) {
        message-&gt;<a href="qlabel.html#setText">setText</a>( "" );
        return;
    }

    MessageListItem *item = ( MessageListItem* )i;
    Message *msg = item-&gt;message();

    <a href="qstring.html">QString</a> text;
    <a href="qstring.html">QString</a> tmp = msg-&gt;header().sender();
<a name="x349"></a>    tmp = tmp.<a href="qstring.html#replace">replace</a>( QRegExp( "&lt;" ), "&amp;lt;" );
    tmp = tmp.<a href="qstring.html#replace">replace</a>( QRegExp( "&gt;" ), "&amp;gt;" );
    text = QString( "&lt;b&gt;&lt;i&gt;From:&lt;/i&gt;&lt;/b&gt; &lt;a href=\"mailto:[e-mail]\"&gt;%1&lt;/a&gt;&lt;br&gt;"
                    "&lt;b&gt;&lt;i&gt;Subject:&lt;/i&gt;&lt;/b&gt; &lt;big&gt;&lt;big&gt;&lt;b&gt;%2&lt;/b&gt;&lt;/big&gt;&lt;/big&gt;&lt;br&gt;"
                    "&lt;b&gt;&lt;i&gt;Date:&lt;/i&gt;&lt;/b&gt; %3&lt;br&gt;&lt;br&gt;"
                    "%4" ).
           arg( tmp ).arg( msg-&gt;header().subject() ).
           arg( msg-&gt;header().datetime().toString() ).arg( msg-&gt;body() );

    message-&gt;<a href="qlabel.html#setText">setText</a>( text );

    msg-&gt;setState( Message::Read );
}
</pre>

<p> <hr>
<p> Main:
<p> <pre>/****************************************************************************
** $Id:  qt/main.cpp   3.0.5   edited Oct 12 2001 $
**
** 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 &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;

int main( int argc, char **argv )
{
    <a href="qapplication.html">QApplication</a> a( argc, argv );

    ListViews listViews;
<a name="x353"></a>    listViews.<a href="qwidget.html#resize">resize</a>( 640, 480 );
<a name="x354"></a>    listViews.<a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Listview" );
    a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &amp;listViews );
    listViews.<a href="qwidget.html#show">show</a>();

    return a.<a href="qapplication.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 &copy; 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>