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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/application/application.doc:5 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>A Complete Application Window</title>
<style type="text/css"><!--
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<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">
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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>A Complete Application Window</h1>

 
<p> 
<p> This example program looks like a complete modern application.  It
has a menu bar, it has a tool bar, it has a status bar and works
like a simple text editor.
<p> There is a <a href="simple-application.html">walkthrough</a> of
this example.
<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 TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#ifndef APPLICATION_H
#define APPLICATION_H

#include &lt;<a href="tqmainwindow-h.html">tqmainwindow.h</a>&gt;

class TQTextEdit;

class ApplicationWindow: public <a href="tqmainwindow.html">TQMainWindow</a>
{
    <a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>

public:
    ApplicationWindow();
    ~ApplicationWindow();

protected:
    void closeEvent( <a href="tqcloseevent.html">TQCloseEvent</a>* );

private slots:
    void newDoc();
    void choose();
    void load( const <a href="tqstring.html">TQString</a> &amp;fileName );
    void save();
    void saveAs();
    void print();

    void about();
    void aboutTQt();

private:
    <a href="tqprinter.html">TQPrinter</a> *printer;
    <a href="tqtextedit.html">TQTextEdit</a> *e;
    <a href="tqstring.html">TQString</a> filename;
};


#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 TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include "application.h"

#include &lt;<a href="tqimage-h.html">tqimage.h</a>&gt;
#include &lt;<a href="tqpixmap-h.html">tqpixmap.h</a>&gt;
#include &lt;<a href="tqtoolbar-h.html">tqtoolbar.h</a>&gt;
#include &lt;<a href="tqtoolbutton-h.html">tqtoolbutton.h</a>&gt;
#include &lt;<a href="tqpopupmenu-h.html">tqpopupmenu.h</a>&gt;
#include &lt;<a href="tqmenubar-h.html">tqmenubar.h</a>&gt;
#include &lt;<a href="tqtextedit-h.html">tqtextedit.h</a>&gt;
#include &lt;<a href="tqfile-h.html">tqfile.h</a>&gt;
#include &lt;<a href="tqfiledialog-h.html">tqfiledialog.h</a>&gt;
#include &lt;<a href="tqstatusbar-h.html">tqstatusbar.h</a>&gt;
#include &lt;<a href="qmessagebox-h.html">ntqmessagebox.h</a>&gt;
#include &lt;<a href="tqprinter-h.html">tqprinter.h</a>&gt;
#include &lt;<a href="qapplication-h.html">ntqapplication.h</a>&gt;
#include &lt;<a href="tqaccel-h.html">tqaccel.h</a>&gt;
#include &lt;<a href="tqtextstream-h.html">tqtextstream.h</a>&gt;
#include &lt;<a href="tqpainter-h.html">tqpainter.h</a>&gt;
#include &lt;<a href="tqpaintdevicemetrics-h.html">tqpaintdevicemetrics.h</a>&gt;
#include &lt;<a href="tqwhatsthis-h.html">tqwhatsthis.h</a>&gt;
#include &lt;<a href="tqsimplerichtext-h.html">tqsimplerichtext.h</a>&gt;

#include "filesave.xpm"
#include "fileopen.xpm"
#include "fileprint.xpm"

<a name="f459"></a>ApplicationWindow::ApplicationWindow()
    : <a href="tqmainwindow.html">TQMainWindow</a>( 0, "example application main window", WDestructiveClose | WGroupLeader )
{
    printer = new <a href="tqprinter.html">TQPrinter</a>( TQPrinter::HighResolution );
    <a href="tqpixmap.html">TQPixmap</a> openIcon, saveIcon, printIcon;

    <a href="tqtoolbar.html">TQToolBar</a> * fileTools = new <a href="tqtoolbar.html">TQToolBar</a>( this, "file operations" );
<a name="x1590"></a>    fileTools-&gt;<a href="tqtoolbar.html#setLabel">setLabel</a>( "File Operations" );

    openIcon = TQPixmap( fileopen );
    TQToolButton * fileOpen
        = new <a href="tqtoolbutton.html">TQToolButton</a>( openIcon, "Open File", <a href="tqstring.html#TQString-null">TQString::null</a>,
                           this, TQ_SLOT(choose()), fileTools, "open file" );

    saveIcon = TQPixmap( filesave );
    TQToolButton * fileSave
        = new <a href="tqtoolbutton.html">TQToolButton</a>( saveIcon, "Save File", TQString::null,
                           this, TQ_SLOT(save()), fileTools, "save file" );

    printIcon = TQPixmap( fileprint );
    TQToolButton * filePrint
        = new <a href="tqtoolbutton.html">TQToolButton</a>( printIcon, "Print File", TQString::null,
                           this, TQ_SLOT(print()), fileTools, "print file" );


    (void)TQWhatsThis::whatsThisButton( fileTools );

    const char * fileOpenText = "&lt;p&gt;&lt;img source=\"fileopen\"&gt; "
                 "Click this button to open a &lt;em&gt;new file&lt;/em&gt;.&lt;br&gt;"
                 "You can also select the &lt;b&gt;Open&lt;/b&gt; command "
                 "from the &lt;b&gt;File&lt;/b&gt; menu.&lt;/p&gt;";

<a name="x1591"></a>    TQWhatsThis::<a href="tqwhatsthis.html#add">add</a>( fileOpen, fileOpenText );

<a name="x1558"></a>    TQMimeSourceFactory::<a href="tqmimesourcefactory.html#defaultFactory">defaultFactory</a>()-&gt;setPixmap( "document-open", openIcon );

    const char * fileSaveText = "&lt;p&gt;Click this button to save the file you "
                 "are editing. You will be prompted for a file name.\n"
                 "You can also select the &lt;b&gt;Save&lt;/b&gt; command "
                 "from the &lt;b&gt;File&lt;/b&gt; menu.&lt;/p&gt;";

    TQWhatsThis::<a href="tqwhatsthis.html#add">add</a>( fileSave, fileSaveText );

    const char * filePrintText = "Click this button to print the file you "
                 "are editing.\n"
                 "You can also select the Print command "
                 "from the File menu.";

    TQWhatsThis::<a href="tqwhatsthis.html#add">add</a>( filePrint, filePrintText );


    <a href="tqpopupmenu.html">TQPopupMenu</a> * file = new <a href="tqpopupmenu.html">TQPopupMenu</a>( this );
    <a href="tqmainwindow.html#menuBar">menuBar</a>()-&gt;insertItem( "&amp;File", file );


    file-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( "&amp;New", this, TQ_SLOT(newDoc()), CTRL+Key_N );

    int id;
    id = file-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( openIcon, "&amp;Open...",
                           this, TQ_SLOT(choose()), CTRL+Key_O );
<a name="x1554"></a>    file-&gt;<a href="tqmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileOpenText );

    id = file-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( saveIcon, "&amp;Save",
                           this, TQ_SLOT(save()), CTRL+Key_S );
    file-&gt;<a href="tqmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileSaveText );

    id = file-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( "Save &amp;As...", this, TQ_SLOT(saveAs()) );
    file-&gt;<a href="tqmenudata.html#setWhatsThis">setWhatsThis</a>( id, fileSaveText );

    file-&gt;<a href="tqmenudata.html#insertSeparator">insertSeparator</a>();

    id = file-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( printIcon, "&amp;Print...",
                           this, TQ_SLOT(print()), CTRL+Key_P );
    file-&gt;<a href="tqmenudata.html#setWhatsThis">setWhatsThis</a>( id, filePrintText );

    file-&gt;<a href="tqmenudata.html#insertSeparator">insertSeparator</a>();

    file-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( "&amp;Close", this, TQ_SLOT(<a href="tqwidget.html#close">close</a>()), CTRL+Key_W );

<a name="x1544"></a>    file-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( "&amp;Quit", tqApp, TQ_SLOT( <a href="ntqapplication.html#closeAllWindows">closeAllWindows</a>() ), CTRL+Key_Q );

    <a href="tqmainwindow.html#menuBar">menuBar</a>()-&gt;insertSeparator();

    <a href="tqpopupmenu.html">TQPopupMenu</a> * help = new <a href="tqpopupmenu.html">TQPopupMenu</a>( this );
    <a href="tqmainwindow.html#menuBar">menuBar</a>()-&gt;insertItem( "&amp;Help", help );

    help-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( "&amp;About", this, TQ_SLOT(about()), Key_F1 );
    help-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( "About &amp;TQt", this, TQ_SLOT(aboutTQt()) );
    help-&gt;<a href="tqmenudata.html#insertSeparator">insertSeparator</a>();
    help-&gt;<a href="tqmenudata.html#insertItem">insertItem</a>( "What's &amp;This", this, TQ_SLOT(<a href="tqmainwindow.html#whatsThis">whatsThis</a>()), SHIFT+Key_F1 );

    e = new <a href="tqtextedit.html">TQTextEdit</a>( this, "editor" );
    e-&gt;<a href="tqwidget.html#setFocus">setFocus</a>();
    <a href="tqmainwindow.html#setCentralWidget">setCentralWidget</a>( e );
    <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Ready", 2000 );

    <a href="tqwidget.html#resize">resize</a>( 450, 600 );
}


ApplicationWindow::~ApplicationWindow()
{
    delete printer;
}



void <a name="f460"></a>ApplicationWindow::newDoc()
{
    ApplicationWindow *ed = new ApplicationWindow;
    ed-&gt;<a href="tqwidget.html#setCaption">setCaption</a>("TQt Example - Application");
    ed-&gt;<a href="tqwidget.html#show">show</a>();
}

void <a name="f461"></a>ApplicationWindow::choose()
{
<a name="x1549"></a>    <a href="tqstring.html">TQString</a> fn = TQFileDialog::<a href="tqfiledialog.html#getOpenFileName">getOpenFileName</a>( TQString::null, TQString::null,
                                               this);
    if ( !fn.<a href="tqstring.html#isEmpty">isEmpty</a>() )
        load( fn );
    else
        <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Loading aborted", 2000 );
}


void <a name="f462"></a>ApplicationWindow::load( const <a href="tqstring.html">TQString</a> &amp;fileName )
{
    <a href="tqfile.html">TQFile</a> f( fileName );
<a name="x1548"></a>    if ( !f.<a href="tqfile.html#open">open</a>( <a href="tqfile.html#open">IO_ReadOnly</a> ) )
        return;

    <a href="tqtextstream.html">TQTextStream</a> ts( &amp;f );
<a name="x1589"></a><a name="x1586"></a>    e-&gt;<a href="tqtextedit.html#setText">setText</a>( ts.<a href="tqtextstream.html#read">read</a>() );
<a name="x1585"></a>    e-&gt;<a href="tqtextedit.html#setModified">setModified</a>( FALSE );
    <a href="tqwidget.html#setCaption">setCaption</a>( fileName );
    <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Loaded document " + fileName, 2000 );
}


void <a name="f463"></a>ApplicationWindow::save()
{
    if ( filename.isEmpty() ) {
        saveAs();
        return;
    }

<a name="x1588"></a>    <a href="tqstring.html">TQString</a> text = e-&gt;<a href="tqtextedit.html#text">text</a>();
    <a href="tqfile.html">TQFile</a> f( filename );
    if ( !f.<a href="tqfile.html#open">open</a>( <a href="tqfile.html#open">IO_WriteOnly</a> ) ) {
        <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( TQString("Could not write to %1").arg(filename),
                              2000 );
        return;
    }

    <a href="tqtextstream.html">TQTextStream</a> t( &amp;f );
    t &lt;&lt; text;
    f.<a href="tqfile.html#close">close</a>();

    e-&gt;<a href="tqtextedit.html#setModified">setModified</a>( FALSE );

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

    <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( TQString( "File %1 saved" ).arg( filename ), 2000 );
}


void <a name="f464"></a>ApplicationWindow::saveAs()
{
<a name="x1550"></a>    <a href="tqstring.html">TQString</a> fn = TQFileDialog::<a href="tqfiledialog.html#getSaveFileName">getSaveFileName</a>( TQString::null, TQString::null,
                                               this );
    if ( !fn.<a href="tqstring.html#isEmpty">isEmpty</a>() ) {
        filename = fn;
        save();
    } else {
        <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Saving aborted", 2000 );
    }
}


void <a name="f465"></a>ApplicationWindow::print()
{
<a name="x1568"></a>    printer-&gt;<a href="tqprinter.html#setFullPage">setFullPage</a>( TRUE );
<a name="x1569"></a>    if ( printer-&gt;<a href="tqprinter.html#setup">setup</a>(this) ) {               // printer dialog
        <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Printing..." );
        <a href="tqpainter.html">TQPainter</a> p;
        if( !p.<a href="tqpainter.html#begin">begin</a>( printer ) ) {               // paint on printer
            <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Printing aborted", 2000 );
            return;
        }

<a name="x1563"></a>        <a href="tqpaintdevicemetrics.html">TQPaintDeviceMetrics</a> metrics( p.<a href="tqpainter.html#device">device</a>() );
<a name="x1560"></a>        int dpiy = metrics.<a href="tqpaintdevicemetrics.html#logicalDpiY">logicalDpiY</a>();
        int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
<a name="x1561"></a><a name="x1559"></a>        <a href="tqrect.html">TQRect</a> view( margin, margin, metrics.<a href="tqpaintdevicemetrics.html#width">width</a>() - 2*margin, metrics.<a href="tqpaintdevicemetrics.html#height">height</a>() - 2*margin );
<a name="x1581"></a>        <a href="tqsimplerichtext.html">TQSimpleRichText</a> richText( TQStyleSheet::<a href="tqstylesheet.html#convertFromPlainText">convertFromPlainText</a>(e-&gt;<a href="tqtextedit.html#text">text</a>()),
                                  TQFont(),
<a name="x1582"></a>                                  e-&gt;<a href="tqtextedit.html#context">context</a>(),
<a name="x1587"></a>                                  e-&gt;<a href="tqtextedit.html#styleSheet">styleSheet</a>(),
<a name="x1584"></a>                                  e-&gt;<a href="tqtextedit.html#mimeSourceFactory">mimeSourceFactory</a>(),
                                  view.<a href="tqrect.html#height">height</a>() );
<a name="x1578"></a>        richText.<a href="tqsimplerichtext.html#setWidth">setWidth</a>( &amp;p, view.<a href="tqrect.html#width">width</a>() );
        int page = 1;
        do {
<a name="x1576"></a>            richText.<a href="tqsimplerichtext.html#draw">draw</a>( &amp;p, margin, margin, view, colorGroup() );
<a name="x1572"></a>            view.<a href="tqrect.html#moveBy">moveBy</a>( 0, view.<a href="tqrect.html#height">height</a>() );
<a name="x1566"></a>            p.<a href="tqpainter.html#translate">translate</a>( 0 , -view.<a href="tqrect.html#height">height</a>() );
<a name="x1580"></a><a name="x1573"></a><a name="x1565"></a>            p.<a href="tqpainter.html#drawText">drawText</a>( view.<a href="tqrect.html#right">right</a>() - p.<a href="tqpainter.html#fontMetrics">fontMetrics</a>().width( TQString::<a href="tqstring.html#number">number</a>( page ) ),
<a name="x1570"></a>                        view.<a href="tqrect.html#bottom">bottom</a>() + p.<a href="tqpainter.html#fontMetrics">fontMetrics</a>().ascent() + 5, TQString::number( page ) );
<a name="x1577"></a>            if ( view.<a href="tqrect.html#top">top</a>() - margin &gt;= richText.<a href="tqsimplerichtext.html#height">height</a>() )
                break;
<a name="x1567"></a>            printer-&gt;<a href="tqprinter.html#newPage">newPage</a>();
            page++;
        } while (TRUE);

        <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Printing completed", 2000 );
    } else {
        <a href="tqmainwindow.html#statusBar">statusBar</a>()-&gt;message( "Printing aborted", 2000 );
    }
}

<a name="x1592"></a>void ApplicationWindow::<a href="tqwidget.html#closeEvent">closeEvent</a>( <a href="tqcloseevent.html">TQCloseEvent</a>* ce )
{
<a name="x1583"></a>    if ( !e-&gt;<a href="tqtextedit.html#isModified">isModified</a>() ) {
<a name="x1545"></a>        ce-&gt;<a href="tqcloseevent.html#accept">accept</a>();
        return;
    }

<a name="x1557"></a>    switch( TQMessageBox::<a href="ntqmessagebox.html#information">information</a>( this, "TQt Application Example",
                                      "Do you want to save the changes"
                                      " to the document?",
                                      "Yes", "No", "Cancel",
                                      0, 1 ) ) {
    case 0:
        save();
        ce-&gt;<a href="tqcloseevent.html#accept">accept</a>();
        break;
    case 1:
        ce-&gt;<a href="tqcloseevent.html#accept">accept</a>();
        break;
    case 2:
    default: // just for sanity
<a name="x1546"></a>        ce-&gt;<a href="tqcloseevent.html#ignore">ignore</a>();
        break;
    }
}


void <a name="f466"></a>ApplicationWindow::about()
{
<a name="x1555"></a>    TQMessageBox::<a href="ntqmessagebox.html#about">about</a>( this, "TQt Application Example",
                        "This example demonstrates simple use of "
                        "TQMainWindow,\nTQMenuBar and TQToolBar.");
}


void <a name="f467"></a>ApplicationWindow::aboutTQt()
{
<a name="x1556"></a>    TQMessageBox::<a href="ntqmessagebox.html#aboutTQt">aboutTQt</a>( this, "TQt Application Example" );
}
</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 &lt;<a href="qapplication-h.html">ntqapplication.h</a>&gt;
#include "application.h"

int main( int argc, char ** argv ) {
    <a href="ntqapplication.html">TQApplication</a> a( argc, argv );
    ApplicationWindow *mw = new ApplicationWindow();
    mw-&gt;<a href="tqwidget.html#setCaption">setCaption</a>( "TQt Example - Application" );
<a name="x1598"></a>    mw-&gt;<a href="tqwidget.html#show">show</a>();
<a name="x1599"></a>    a.<a href="tqobject.html#connect">connect</a>( &amp;a, TQ_SIGNAL(<a href="ntqapplication.html#lastWindowClosed">lastWindowClosed</a>()), &amp;a, TQ_SLOT(<a href="ntqapplication.html#quit">quit</a>()) );
    return a.<a href="ntqapplication.html#exec">exec</a>();
}
</pre>

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

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