mdi-example.html

QT 下载资料仅供参考

}

void <a name="f536"></a>ApplicationWindow::load()
{
<a name="x2007"></a>    <a href="qstring.html">QString</a> fn = QFileDialog::<a href="qfiledialog.html#getOpenFileName">getOpenFileName</a>( QString::null, QString::null, this );
    if ( !fn.<a href="qstring.html#isEmpty">isEmpty</a>() ) {
        MDIWindow* w = newDoc();
        w-&gt;load( fn );
    }  else {
        <a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Loading aborted", 2000 );
    }
}

void <a name="f537"></a>ApplicationWindow::save()
{
<a name="x2059"></a>    MDIWindow* m = (MDIWindow*)ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>();
    if ( m )
        m-&gt;save();
}


void <a name="f538"></a>ApplicationWindow::saveAs()
{
    MDIWindow* m = (MDIWindow*)ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>();
    if ( m )
        m-&gt;saveAs();
}


void <a name="f539"></a>ApplicationWindow::print()
{
#ifndef QT_NO_PRINTER
    MDIWindow* m = (MDIWindow*)ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>();
    if ( m )
        m-&gt;print( printer );
#endif
}


void <a name="f540"></a>ApplicationWindow::closeWindow()
{
    MDIWindow* m = (MDIWindow*)ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>();
    if ( m )
<a name="x2045"></a>        m-&gt;<a href="qwidget.html#close">close</a>();
}

void <a name="f541"></a>ApplicationWindow::about()
{
<a name="x2019"></a>    QMessageBox::<a href="qmessagebox.html#about">about</a>( this, "Qt Application Example",
                        "This example demonstrates simple use of\n "
                        "Qt's Multiple Document Interface (MDI).");
}


void <a name="f542"></a>ApplicationWindow::aboutQt()
{
    QMessageBox::<a href="qmessagebox.html#aboutQt">aboutQt</a>( this, "Qt Application Example" );
}


void <a name="f543"></a>ApplicationWindow::windowsMenuAboutToShow()
{
<a name="x2012"></a>    windowsMenu-&gt;<a href="qmenudata.html#clear">clear</a>();
<a name="x2060"></a>    int cascadeId = windowsMenu-&gt;<a href="qmenudata.html#insertItem">insertItem</a>("&amp;Cascade", ws, SLOT(<a href="qworkspace.html#cascade">cascade</a>() ) );
<a name="x2062"></a>    int tileId = windowsMenu-&gt;<a href="qmenudata.html#insertItem">insertItem</a>("&amp;Tile", ws, SLOT(<a href="qworkspace.html#tile">tile</a>() ) );
    int horTileId = windowsMenu-&gt;<a href="qmenudata.html#insertItem">insertItem</a>("Tile &amp;Horizontally", this, SLOT(tileHorizontal() ) );
    if ( ws-&gt;<a href="qworkspace.html#windowList">windowList</a>().isEmpty() ) {
<a name="x2016"></a>        windowsMenu-&gt;<a href="qmenudata.html#setItemEnabled">setItemEnabled</a>( cascadeId, FALSE );
        windowsMenu-&gt;<a href="qmenudata.html#setItemEnabled">setItemEnabled</a>( tileId, FALSE );
        windowsMenu-&gt;<a href="qmenudata.html#setItemEnabled">setItemEnabled</a>( horTileId, FALSE );
    }
    windowsMenu-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
    QWidgetList windows = ws-&gt;<a href="qworkspace.html#windowList">windowList</a>();
<a name="x2036"></a>    for ( int i = 0; i &lt; int(windows.count()); ++i ) {
<a name="x2035"></a>        int id = windowsMenu-&gt;<a href="qmenudata.html#insertItem">insertItem</a>(windows.at(i)-&gt;caption(),
                                         this, SLOT( windowsMenuActivated( int ) ) );
<a name="x2017"></a>        windowsMenu-&gt;<a href="qmenudata.html#setItemParameter">setItemParameter</a>( id, i );
<a name="x2015"></a>        windowsMenu-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( id, ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>() == windows.at(i) );
    }
}

void <a name="f544"></a>ApplicationWindow::windowsMenuActivated( int id )
{
    <a href="qwidget.html">QWidget</a>* w = ws-&gt;<a href="qworkspace.html#windowList">windowList</a>().at( id );
    if ( w )
<a name="x2056"></a>        w-&gt;<a href="qwidget.html#showNormal">showNormal</a>();
<a name="x2052"></a>    w-&gt;<a href="qwidget.html#setFocus">setFocus</a>();
}

void <a name="f545"></a>ApplicationWindow::tileHorizontal()
{
    // primitive horizontal tiling
    QWidgetList windows = ws-&gt;<a href="qworkspace.html#windowList">windowList</a>();
    if ( !windows.count() )
        return;

    int heightForEach = ws-&gt;<a href="qwidget.html#height">height</a>() / windows.count();
    int y = 0;
    for ( int i = 0; i &lt; int(windows.count()); ++i ) {
        <a href="qwidget.html">QWidget</a> *window = windows.at(i);
<a name="x2057"></a>        if ( window-&gt;testWState( WState_Maximized ) ) {
            // prevent flicker
<a name="x2047"></a>            window-&gt;<a href="qwidget.html#hide">hide</a>();
            window-&gt;<a href="qwidget.html#showNormal">showNormal</a>();
        }
<a name="x2049"></a><a name="x2048"></a>        int preferredHeight = window-&gt;<a href="qwidget.html#minimumHeight">minimumHeight</a>()+window-&gt;<a href="qwidget.html#parentWidget">parentWidget</a>()-&gt;baseSize().height();
        int actHeight = QMAX(heightForEach, preferredHeight);

<a name="x2058"></a>        window-&gt;<a href="qwidget.html#parentWidget">parentWidget</a>()-&gt;setGeometry( 0, y, ws-&gt;<a href="qwidget.html#width">width</a>(), actHeight );
        y += actHeight;
    }
}


<a name="f546"></a>MDIWindow::MDIWindow( <a href="qwidget.html">QWidget</a>* parent, const char* name, int wflags )
    : <a href="qmainwindow.html">QMainWindow</a>( parent, name, wflags )
{
    mmovie = 0;
    medit = new <a href="qmultilineedit.html">QMultiLineEdit</a>( this );
    <a href="qwidget.html#setFocusProxy">setFocusProxy</a>( medit );
    <a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>( medit );
}

MDIWindow::~MDIWindow()
{
    delete mmovie;
}


void <a name="f547"></a>MDIWindow::load( const <a href="qstring.html">QString</a>&amp; fn )
{
    filename  = fn;
    <a href="qfile.html">QFile</a> f( filename );
    if ( !f.<a href="qfile.html#open">open</a>( <a href="qfile.html#open">IO_ReadOnly</a> ) )
        return;

<a name="x2037"></a>    if(fn.<a href="qstring.html#contains">contains</a>(".gif")) {
        <a href="qwidget.html">QWidget</a> * tmp=new <a href="qwidget.html">QWidget</a>(this);
        <a href="qwidget.html#setFocusProxy">setFocusProxy</a>(tmp);
        <a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>(tmp);
        medit-&gt;<a href="qwidget.html#hide">hide</a>();
        delete medit;
        <a href="qmovie.html">QMovie</a> * qm=new <a href="qmovie.html">QMovie</a>(fn);
#ifdef Q_WS_QWS // temporary speed-test hack
<a name="x2021"></a>        qm-&gt;setDisplayWidget(tmp);
#endif
<a name="x2050"></a>        tmp-&gt;<a href="qwidget.html#setBackgroundMode">setBackgroundMode</a>(QWidget::NoBackground);
        tmp-&gt;<a href="qwidget.html#show">show</a>();
        mmovie=qm;
    } else {
        mmovie = 0;

        <a href="qtextstream.html">QTextStream</a> t(&amp;f);
<a name="x2043"></a>        <a href="qstring.html">QString</a> s = t.<a href="qtextstream.html#read">read</a>();
        medit-&gt;<a href="qtextedit.html#setText">setText</a>( s );
<a name="x2005"></a>        f.<a href="qfile.html#close">close</a>();


    }
    <a href="qwidget.html#setCaption">setCaption</a>( filename );
    emit message( QString("Loaded document %1").arg(filename), 2000 );
}

void <a name="f548"></a>MDIWindow::save()
{
    if ( filename.isEmpty() ) {
        saveAs();
        return;
    }

<a name="x2042"></a>    <a href="qstring.html">QString</a> text = medit-&gt;<a href="qtextedit.html#text">text</a>();
    <a href="qfile.html">QFile</a> f( filename );
    if ( !f.<a href="qfile.html#open">open</a>( <a href="qfile.html#open">IO_WriteOnly</a> ) ) {
        emit message( QString("Could not write to %1").arg(filename),
                      2000 );
        return;
    }

    <a href="qtextstream.html">QTextStream</a> t( &amp;f );
    t &lt;&lt; text;
    f.<a href="qfile.html#close">close</a>();

    <a href="qwidget.html#setCaption">setCaption</a>( filename );

    emit message( QString( "File %1 saved" ).arg( filename ), 2000 );
}

void <a name="f549"></a>MDIWindow::saveAs()
{
    <a href="qstring.html">QString</a> fn = QFileDialog::<a href="qfiledialog.html#getSaveFileName">getSaveFileName</a>( filename, QString::null, this );
    if ( !fn.<a href="qstring.html#isEmpty">isEmpty</a>() ) {
        filename = fn;
        save();
    } else {
        emit message( "Saving aborted", 2000 );
    }
}

void <a name="f550"></a>MDIWindow::print( <a href="qprinter.html">QPrinter</a>* printer)
{
#ifndef QT_NO_PRINTER
    const int Margin = 10;
    int pageNo = 1;

<a name="x2034"></a>    if ( printer-&gt;<a href="qprinter.html#setup">setup</a>(this) ) {               // printer dialog
        emit message( "Printing...", 0 );
        <a href="qpainter.html">QPainter</a> p;
        if ( !p.<a href="qpainter.html#begin">begin</a>( printer ) )
            return;                             // paint on printer
<a name="x2040"></a>        p.<a href="qpainter.html#setFont">setFont</a>( medit-&gt;<a href="qtextedit.html#font">font</a>() );
        int yPos        = 0;                    // y position for each line
<a name="x2029"></a>        <a href="qfontmetrics.html">QFontMetrics</a> fm = p.<a href="qpainter.html#fontMetrics">fontMetrics</a>();
        <a href="qpaintdevicemetrics.html">QPaintDeviceMetrics</a> metrics( printer ); // need width/height
        // of printer surface
<a name="x2022"></a>        for( int i = 0 ; i &lt; medit-&gt;<a href="qmultilineedit.html#numLines">numLines</a>() ; i++ ) {
<a name="x2024"></a>            if ( Margin + yPos &gt; metrics.<a href="qpaintdevicemetrics.html#height">height</a>() - Margin ) {
                <a href="qstring.html">QString</a> msg( "Printing (page " );
<a name="x2039"></a>                msg += QString::<a href="qstring.html#number">number</a>( ++pageNo );
                msg += ")...";
                emit message( msg, 0 );
<a name="x2033"></a>                printer-&gt;<a href="qprinter.html#newPage">newPage</a>();             // no more room on this page
                yPos = 0;                       // back to top of page
            }
            p.<a href="qpainter.html#drawText">drawText</a>( Margin, Margin + yPos,
<a name="x2025"></a><a name="x2009"></a>                        metrics.<a href="qpaintdevicemetrics.html#width">width</a>(), fm.<a href="qfontmetrics.html#lineSpacing">lineSpacing</a>(),
                        ExpandTabs | DontClip,
<a name="x2023"></a>                        medit-&gt;<a href="qmultilineedit.html#textLine">textLine</a>( i ) );
            yPos = yPos + fm.<a href="qfontmetrics.html#lineSpacing">lineSpacing</a>();
        }
        p.<a href="qpainter.html#end">end</a>();                                // send job to printer
        emit message( "Printing completed", 2000 );
    } else {
        emit message( "Printing aborted", 2000 );
    }
#endif
}
</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 &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
#include "application.h"

int main( int argc, char ** argv ) {
    <a href="qapplication.html">QApplication</a> a( argc, argv );
    ApplicationWindow * mw = new ApplicationWindow();
    mw-&gt;<a href="qwidget.html#setCaption">setCaption</a>( "Qt Example - Multiple Documents Interface (MDI)" );
    mw-&gt;<a href="qwidget.html#show">show</a>();
<a name="x2068"></a>    a.<a href="qobject.html#connect">connect</a>( &amp;a, SIGNAL(<a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>()), &amp;a, SLOT(<a href="qapplication.html#quit">quit</a>()) );
    int res = a.<a href="qapplication.html#exec">exec</a>();
    return res;
}
</pre>

<p>See also <a href="examples.html">Examples</a>.

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<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>
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