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qt3/doc/html/mdi-example.html

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/mdi/mdi.doc:4 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>An MDI Application</title>
<style type="text/css"><!--
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&nbsp;Classes</font></a>
| <a href="mainclasses.html">
<font color="#004faf">Main&nbsp;Classes</font></a>
| <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
| <a href="groups.html">
<font color="#004faf">Grouped&nbsp;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>An MDI Application</h1>
<p>
This example program is just like the application example, except
that it provides a Multiple Document Interface (MDI).
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/application.h 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 Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#ifndef APPLICATION_H
#define APPLICATION_H
#include &lt;<a href="qmainwindow-h.html">qmainwindow.h</a>&gt;
#include &lt;<a href="qptrlist-h.html">qptrlist.h</a>&gt;
class QTextEdit;
class QToolBar;
class QPopupMenu;
class QWorkspace;
class QPopupMenu;
class QMovie;
class MDIWindow: public <a href="qmainwindow.html">QMainWindow</a>
{
<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
public:
MDIWindow( <a href="qwidget.html">QWidget</a>* parent, const char* name, int wflags );
~MDIWindow();
void load( const <a href="qstring.html">QString</a>&amp; fn );
void save();
void saveAs();
void print( <a href="qprinter.html">QPrinter</a>* );
protected:
void closeEvent( <a href="qcloseevent.html">QCloseEvent</a> * );
signals:
void message(const <a href="qstring.html">QString</a>&amp;, int );
private:
<a href="qtextedit.html">QTextEdit</a>* medit;
<a href="qmovie.html">QMovie</a> * mmovie;
<a href="qstring.html">QString</a> filename;
};
class ApplicationWindow: public <a href="qmainwindow.html">QMainWindow</a>
{
Q_OBJECT
public:
ApplicationWindow();
~ApplicationWindow();
protected:
void closeEvent( <a href="qcloseevent.html">QCloseEvent</a> * );
private slots:
MDIWindow* newDoc();
void load();
void save();
void saveAs();
void print();
void closeWindow();
void tileHorizontal();
void about();
void aboutQt();
void windowsMenuAboutToShow();
void windowsMenuActivated( int id );
private:
<a href="qprinter.html">QPrinter</a> *printer;
<a href="qworkspace.html">QWorkspace</a>* ws;
<a href="qtoolbar.html">QToolBar</a> *fileTools;
<a href="qpopupmenu.html">QPopupMenu</a>* windowsMenu;
};
#endif
</pre>
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/application.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 Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "application.h"
#include &lt;<a href="qworkspace-h.html">qworkspace.h</a>&gt;
#include &lt;<a href="qimage-h.html">qimage.h</a>&gt;
#include &lt;<a href="qpixmap-h.html">qpixmap.h</a>&gt;
#include &lt;<a href="qtoolbar-h.html">qtoolbar.h</a>&gt;
#include &lt;<a href="qtoolbutton-h.html">qtoolbutton.h</a>&gt;
#include &lt;<a href="qpopupmenu-h.html">qpopupmenu.h</a>&gt;
#include &lt;<a href="qmenubar-h.html">qmenubar.h</a>&gt;
#include &lt;<a href="qmovie-h.html">qmovie.h</a>&gt;
#include &lt;<a href="qfile-h.html">qfile.h</a>&gt;
#include &lt;<a href="qfiledialog-h.html">qfiledialog.h</a>&gt;
#include &lt;<a href="qlabel-h.html">qlabel.h</a>&gt;
#include &lt;<a href="qstatusbar-h.html">qstatusbar.h</a>&gt;
#include &lt;<a href="qmessagebox-h.html">qmessagebox.h</a>&gt;
#include &lt;<a href="qprinter-h.html">qprinter.h</a>&gt;
#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
#include &lt;<a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
#include &lt;<a href="qaccel-h.html">qaccel.h</a>&gt;
#include &lt;<a href="qtextstream-h.html">qtextstream.h</a>&gt;
#include &lt;<a href="qtextedit-h.html">qtextedit.h</a>&gt;
#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
#include &lt;<a href="qpaintdevicemetrics-h.html">qpaintdevicemetrics.h</a>&gt;
#include &lt;<a href="qwhatsthis-h.html">qwhatsthis.h</a>&gt;
#include &lt;<a href="qobjectlist-h.html">qobjectlist.h</a>&gt;
#include &lt;<a href="qvbox-h.html">qvbox.h</a>&gt;
#include &lt;<a href="qsimplerichtext-h.html">qsimplerichtext.h</a>&gt;
#include "filesave.xpm"
#include "fileopen.xpm"
#include "fileprint.xpm"
const char * fileOpenText = "Click this button to open a &lt;em&gt;new file&lt;/em&gt;. &lt;br&gt;&lt;br&gt;"
"You can also select the &lt;b&gt;Open command&lt;/b&gt; from the File menu.";
const char * fileSaveText = "Click this button to save the file you are "
"editing. You will be prompted for a file name.\n\n"
"You can also select the Save command from the File menu.\n\n"
"Note that implementing this function is left as an exercise for the reader.";
const char * filePrintText = "Click this button to print the file you "
"are editing.\n\n"
"You can also select the Print command from the File menu.";
<a name="f535"></a>ApplicationWindow::ApplicationWindow()
: <a href="qmainwindow.html">QMainWindow</a>( 0, "example application main window", WDestructiveClose )
{
int id;
<a href="qpixmap.html">QPixmap</a> openIcon, saveIcon;
fileTools = new <a href="qtoolbar.html">QToolBar</a>( this, "file operations" );
<a href="qmainwindow.html#addToolBar">addToolBar</a>( fileTools, tr( "File Operations" ), DockTop, TRUE );
openIcon = QPixmap( fileopen );
QToolButton * fileOpen
= new <a href="qtoolbutton.html">QToolButton</a>( openIcon, "Open File", <a href="qstring.html#QString-null">QString::null</a>,
this, SLOT(load()), fileTools, "open file" );
saveIcon = QPixmap( filesave );
QToolButton * fileSave
= new <a href="qtoolbutton.html">QToolButton</a>( saveIcon, "Save File", QString::null,
this, SLOT(save()), fileTools, "save file" );
#ifndef QT_NO_PRINTER
printer = new <a href="qprinter.html">QPrinter</a>( QPrinter::HighResolution );
<a href="qpixmap.html">QPixmap</a> printIcon;
printIcon = QPixmap( fileprint );
QToolButton * filePrint
= new <a href="qtoolbutton.html">QToolButton</a>( printIcon, "Print File", QString::null,
this, SLOT(print()), fileTools, "print file" );
<a name="x2075"></a> QWhatsThis::<a href="qwhatsthis.html#add">add</a>( filePrint, filePrintText );
#endif
(void)QWhatsThis::whatsThisButton( fileTools );
QWhatsThis::<a href="qwhatsthis.html#add">add</a>( fileOpen, fileOpenText );
QWhatsThis::<a href="qwhatsthis.html#add">add</a>( fileSave, fileSaveText );
<a href="qpopupmenu.html">QPopupMenu</a> * file = new <a href="qpopupmenu.html">QPopupMenu</a>( this );
<a href="qmainwindow.html#menuBar">menuBar</a>()-&gt;insertItem( "&amp;File", file );
file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;New", this, SLOT(newDoc()), CTRL+Key_N );
id = file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( openIcon, "&amp;Open...",
this, SLOT(load()), CTRL+Key_O );
<a name="x2035"></a> file-&gt;<a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileOpenText );
id = file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( saveIcon, "&amp;Save",
this, SLOT(save()), CTRL+Key_S );
file-&gt;<a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileSaveText );
id = file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Save &amp;As...", this, SLOT(saveAs()) );
file-&gt;<a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileSaveText );
#ifndef QT_NO_PRINTER
file-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
id = file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( printIcon, "&amp;Print...",
this, SLOT(print()), CTRL+Key_P );
file-&gt;<a href="qmenudata.html#setWhatsThis">setWhatsThis</a>( id, filePrintText );
#endif
file-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;Close", this, SLOT(closeWindow()), CTRL+Key_W );
<a name="x2020"></a> file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;Quit", qApp, SLOT( <a href="qapplication.html#closeAllWindows">closeAllWindows</a>() ), CTRL+Key_Q );
windowsMenu = new <a href="qpopupmenu.html">QPopupMenu</a>( this );
<a name="x2049"></a> windowsMenu-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
<a name="x2048"></a> <a href="qobject.html#connect">connect</a>( windowsMenu, SIGNAL( <a href="qpopupmenu.html#aboutToShow">aboutToShow</a>() ),
this, SLOT( windowsMenuAboutToShow() ) );
<a href="qmainwindow.html#menuBar">menuBar</a>()-&gt;insertItem( "&amp;Windows", windowsMenu );
<a href="qmainwindow.html#menuBar">menuBar</a>()-&gt;insertSeparator();
<a href="qpopupmenu.html">QPopupMenu</a> * help = new <a href="qpopupmenu.html">QPopupMenu</a>( this );
<a href="qmainwindow.html#menuBar">menuBar</a>()-&gt;insertItem( "&amp;Help", help );
help-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;About", this, SLOT(about()), Key_F1);
help-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "About &amp;Qt", this, SLOT(aboutQt()));
help-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
help-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "What's &amp;This", this, SLOT(<a href="qmainwindow.html#whatsThis">whatsThis</a>()), SHIFT+Key_F1);
<a href="qvbox.html">QVBox</a>* vb = new <a href="qvbox.html">QVBox</a>( this );
vb-&gt;<a href="qframe.html#setFrameStyle">setFrameStyle</a>( QFrame::StyledPanel | QFrame::Sunken );
ws = new <a href="qworkspace.html">QWorkspace</a>( vb );
<a name="x2092"></a> ws-&gt;<a href="qworkspace.html#setScrollBarsEnabled">setScrollBarsEnabled</a>( TRUE );
<a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>( vb );
<a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Ready", 2000 );
}
ApplicationWindow::~ApplicationWindow()
{
#ifndef QT_NO_PRINTER
delete printer;
#endif
}
MDIWindow* <a name="f536"></a>ApplicationWindow::newDoc()
{
MDIWindow* w = new MDIWindow( ws, 0, WDestructiveClose );
<a href="qobject.html#connect">connect</a>( w, SIGNAL( message(const <a href="qstring.html">QString</a>&amp;, int) ), statusBar(), SLOT( message(const <a href="qstring.html">QString</a>&amp;, int )) );
w-&gt;<a href="qwidget.html#setCaption">setCaption</a>("unnamed document");
<a name="x2085"></a> w-&gt;<a href="qwidget.html#setIcon">setIcon</a>( QPixmap("document.xpm") );
// show the very first window in maximized mode
<a name="x2094"></a> if ( ws-&gt;<a href="qworkspace.html#windowList">windowList</a>().isEmpty() )
<a name="x2087"></a> w-&gt;<a href="qwidget.html#showMaximized">showMaximized</a>();
else
w-&gt;<a href="qwidget.html#show">show</a>();
return w;
}
void <a name="f537"></a>ApplicationWindow::load()
{
<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="f538"></a>ApplicationWindow::save()
{
<a name="x2090"></a> MDIWindow* m = (MDIWindow*)ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>();
if ( m )
m-&gt;save();
}
void <a name="f539"></a>ApplicationWindow::saveAs()
{
MDIWindow* m = (MDIWindow*)ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>();
if ( m )
m-&gt;saveAs();
}
void <a name="f540"></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="f541"></a>ApplicationWindow::closeWindow()
{
MDIWindow* m = (MDIWindow*)ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>();
if ( m )
<a name="x2076"></a> m-&gt;<a href="qwidget.html#close">close</a>();
}
void <a name="f542"></a>ApplicationWindow::about()
{
<a name="x2036"></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="f543"></a>ApplicationWindow::aboutQt()
{
QMessageBox::<a href="qmessagebox.html#aboutQt">aboutQt</a>( this, "Qt Application Example" );
}
void <a name="f544"></a>ApplicationWindow::windowsMenuAboutToShow()
{
<a name="x2029"></a> windowsMenu-&gt;<a href="qmenudata.html#clear">clear</a>();
<a name="x2091"></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="x2093"></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="x2033"></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="x2054"></a> for ( int i = 0; i &lt; int(windows.count()); ++i ) {
<a name="x2053"></a> int id = windowsMenu-&gt;<a href="qmenudata.html#insertItem">insertItem</a>(windows.at(i)-&gt;caption(),
this, SLOT( windowsMenuActivated( int ) ) );
<a name="x2034"></a> windowsMenu-&gt;<a href="qmenudata.html#setItemParameter">setItemParameter</a>( id, i );
<a name="x2032"></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="f545"></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="x2088"></a> w-&gt;<a href="qwidget.html#showNormal">showNormal</a>();
<a name="x2084"></a> w-&gt;<a href="qwidget.html#setFocus">setFocus</a>();
}
void <a name="f546"></a>ApplicationWindow::tileHorizontal()
{
// primitive horizontal tiling
QWidgetList windows = ws-&gt;<a href="qworkspace.html#windowList">windowList</a>();
if ( !windows.count() )
return;
if (ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>())
ws-&gt;<a href="qworkspace.html#activeWindow">activeWindow</a>()-&gt;showNormal();
<a name="x2078"></a> 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="x2081"></a><a name="x2080"></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="x2089"></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="x2077"></a>void ApplicationWindow::<a href="qwidget.html#closeEvent">closeEvent</a>( <a href="qcloseevent.html">QCloseEvent</a> *e )
{
QWidgetList windows = ws-&gt;<a href="qworkspace.html#windowList">windowList</a>();
if ( windows.count() ) {
for ( int i = 0; i &lt; int(windows.count()); ++i ) {
<a href="qwidget.html">QWidget</a> *window = windows.at( i );
if ( !window-&gt;<a href="qwidget.html#close">close</a>() ) {
<a name="x2022"></a> e-&gt;<a href="qcloseevent.html#ignore">ignore</a>();
return;
}
}
}
QMainWindow::<a href="qwidget.html#closeEvent">closeEvent</a>( e );
}
<a name="f547"></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="qtextedit.html">QTextEdit</a>( this );
<a href="qwidget.html#setFocusProxy">setFocusProxy</a>( medit );
<a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>( medit );
}
MDIWindow::~MDIWindow()
{
delete mmovie;
}
void MDIWindow::<a href="qwidget.html#closeEvent">closeEvent</a>( <a href="qcloseevent.html">QCloseEvent</a> *e )
{
<a name="x2069"></a> if ( medit-&gt;<a href="qtextedit.html#isModified">isModified</a>() ) {
switch( QMessageBox::<a href="qmessagebox.html#warning">warning</a>( this, "Save Changes",
<a href="qobject.html#tr">tr</a>("Save changes to %1?").arg( <a href="qwidget.html#caption">caption</a>() ),
<a href="qobject.html#tr">tr</a>("Yes"), tr("No"), tr("Cancel") ) ) {
case 0:
{
save();
if ( !filename.isEmpty() )
<a name="x2021"></a> e-&gt;<a href="qcloseevent.html#accept">accept</a>();
else
e-&gt;<a href="qcloseevent.html#ignore">ignore</a>();
}
break;
case 1:
e-&gt;<a href="qcloseevent.html#accept">accept</a>();
break;
default:
e-&gt;<a href="qcloseevent.html#ignore">ignore</a>();
break;
}
} else {
e-&gt;<a href="qcloseevent.html#accept">accept</a>();
}
}
void <a name="f548"></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="x2064"></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);
<a name="x2079"></a> 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="x2039"></a> qm-&gt;setDisplayWidget(tmp);
#endif
<a name="x2082"></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="x2074"></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="x2023"></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="f549"></a>MDIWindow::save()
{
if ( filename.isEmpty() ) {
saveAs();
return;
}
<a name="x2073"></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="f550"></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="f551"></a>MDIWindow::print( <a href="qprinter.html">QPrinter</a>* printer)
{
#ifndef QT_NO_PRINTER
int pageNo = 1;
<a name="x2052"></a> if ( printer-&gt;<a href="qprinter.html#setup">setup</a>(this) ) { // printer dialog
<a name="x2051"></a> printer-&gt;<a href="qprinter.html#setFullPage">setFullPage</a>( TRUE );
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="x2044"></a> <a href="qpaintdevicemetrics.html">QPaintDeviceMetrics</a> metrics( p.<a href="qpainter.html#device">device</a>() );
<a name="x2041"></a> int dpiy = metrics.<a href="qpaintdevicemetrics.html#logicalDpiY">logicalDpiY</a>();
int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
<a name="x2042"></a><a name="x2040"></a> <a href="qrect.html">QRect</a> view( margin, margin, metrics.<a href="qpaintdevicemetrics.html#width">width</a>() - 2*margin, metrics.<a href="qpaintdevicemetrics.html#height">height</a>() - 2*margin );
<a name="x2067"></a> <a href="qsimplerichtext.html">QSimpleRichText</a> richText( QStyleSheet::<a href="qstylesheet.html#convertFromPlainText">convertFromPlainText</a>(medit-&gt;<a href="qtextedit.html#text">text</a>()),
QFont(),
<a name="x2068"></a> medit-&gt;<a href="qtextedit.html#context">context</a>(),
<a name="x2072"></a> medit-&gt;<a href="qtextedit.html#styleSheet">styleSheet</a>(),
<a name="x2070"></a> medit-&gt;<a href="qtextedit.html#mimeSourceFactory">mimeSourceFactory</a>(),
view.<a href="qrect.html#height">height</a>() );
<a name="x2063"></a> richText.<a href="qsimplerichtext.html#setWidth">setWidth</a>( &amp;p, view.<a href="qrect.html#width">width</a>() );
int page = 1;
do {
<a name="x2061"></a> richText.<a href="qsimplerichtext.html#draw">draw</a>( &amp;p, margin, margin, view, colorGroup() );
<a name="x2057"></a> view.<a href="qrect.html#moveBy">moveBy</a>( 0, view.<a href="qrect.html#height">height</a>() );
p.<a href="qpainter.html#translate">translate</a>( 0 , -view.<a href="qrect.html#height">height</a>() );
<a name="x2066"></a><a name="x2046"></a> p.<a href="qpainter.html#drawText">drawText</a>( view.<a href="qrect.html#right">right</a>() - p.<a href="qpainter.html#fontMetrics">fontMetrics</a>().width( QString::<a href="qstring.html#number">number</a>( page ) ),
view.<a href="qrect.html#bottom">bottom</a>() + p.<a href="qpainter.html#fontMetrics">fontMetrics</a>().ascent() + 5, QString::number( page ) );
<a name="x2062"></a> if ( view.<a href="qrect.html#top">top</a>() - margin &gt;= richText.<a href="qsimplerichtext.html#height">height</a>() )
break;
<a href="qstring.html">QString</a> msg( "Printing (page " );
msg += QString::<a href="qstring.html#number">number</a>( ++pageNo );
msg += ")...";
emit message( msg, 0 );
<a name="x2050"></a> printer-&gt;<a href="qprinter.html#newPage">newPage</a>();
page++;
} while (TRUE);
}
#endif
}
</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 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();
a.<a href="qapplication.html#setMainWidget">setMainWidget</a>(mw);
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="x2097"></a><a name="x2096"></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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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>Qt 3.3.8</div>
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