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295 lines
7.6 KiB
295 lines
7.6 KiB
/****************************************************************************
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. 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 "application.h"
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#include <qimage.h>
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#include <qpixmap.h>
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#include <qtoolbar.h>
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#include <qtoolbutton.h>
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#include <qpopupmenu.h>
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#include <qmenubar.h>
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#include <qtextedit.h>
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#include <qfile.h>
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#include <qfiledialog.h>
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#include <qstatusbar.h>
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#include <qmessagebox.h>
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#include <qprinter.h>
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#include <qapplication.h>
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#include <qaccel.h>
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#include <qtextstream.h>
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#include <qpainter.h>
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#include <qpaintdevicemetrics.h>
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#include <qwhatsthis.h>
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#include <qsimplerichtext.h>
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#include "filesave.xpm"
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#include "fileopen.xpm"
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#include "fileprint.xpm"
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ApplicationWindow::ApplicationWindow()
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: QMainWindow( 0, "example application main window", WDestructiveClose | WGroupLeader )
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{
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printer = new QPrinter( QPrinter::HighResolution );
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QPixmap openIcon, saveIcon, printIcon;
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QToolBar * fileTools = new QToolBar( this, "file operations" );
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fileTools->setLabel( "File Operations" );
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openIcon = QPixmap( fileopen );
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QToolButton * fileOpen
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= new QToolButton( openIcon, "Open File", QString::null,
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this, SLOT(choose()), fileTools, "open file" );
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saveIcon = QPixmap( filesave );
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QToolButton * fileSave
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= new QToolButton( saveIcon, "Save File", QString::null,
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this, SLOT(save()), fileTools, "save file" );
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printIcon = QPixmap( fileprint );
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QToolButton * filePrint
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= new QToolButton( printIcon, "Print File", QString::null,
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this, SLOT(print()), fileTools, "print file" );
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(void)QWhatsThis::whatsThisButton( fileTools );
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const char * fileOpenText = "<p><img source=\"fileopen\"> "
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"Click this button to open a <em>new file</em>.<br>"
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"You can also select the <b>Open</b> command "
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"from the <b>File</b> menu.</p>";
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QWhatsThis::add( fileOpen, fileOpenText );
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QMimeSourceFactory::defaultFactory()->setPixmap( "fileopen", openIcon );
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const char * fileSaveText = "<p>Click this button to save the file you "
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"are editing. You will be prompted for a file name.\n"
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"You can also select the <b>Save</b> command "
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"from the <b>File</b> menu.</p>";
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QWhatsThis::add( fileSave, fileSaveText );
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const char * filePrintText = "Click this button to print the file you "
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"are editing.\n"
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"You can also select the Print command "
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"from the File menu.";
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QWhatsThis::add( filePrint, filePrintText );
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QPopupMenu * file = new QPopupMenu( this );
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menuBar()->insertItem( "&File", file );
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file->insertItem( "&New", this, SLOT(newDoc()), CTRL+Key_N );
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int id;
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id = file->insertItem( openIcon, "&Open...",
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this, SLOT(choose()), CTRL+Key_O );
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file->setWhatsThis( id, fileOpenText );
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id = file->insertItem( saveIcon, "&Save",
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this, SLOT(save()), CTRL+Key_S );
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file->setWhatsThis( id, fileSaveText );
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id = file->insertItem( "Save &As...", this, SLOT(saveAs()) );
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file->setWhatsThis( id, fileSaveText );
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file->insertSeparator();
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id = file->insertItem( printIcon, "&Print...",
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this, SLOT(print()), CTRL+Key_P );
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file->setWhatsThis( id, filePrintText );
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file->insertSeparator();
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file->insertItem( "&Close", this, SLOT(close()), CTRL+Key_W );
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file->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q );
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menuBar()->insertSeparator();
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QPopupMenu * help = new QPopupMenu( this );
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menuBar()->insertItem( "&Help", help );
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help->insertItem( "&About", this, SLOT(about()), Key_F1 );
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help->insertItem( "About &Qt", this, SLOT(aboutQt()) );
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help->insertSeparator();
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help->insertItem( "What's &This", this, SLOT(whatsThis()), SHIFT+Key_F1 );
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e = new QTextEdit( this, "editor" );
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e->setFocus();
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setCentralWidget( e );
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statusBar()->message( "Ready", 2000 );
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resize( 450, 600 );
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}
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ApplicationWindow::~ApplicationWindow()
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{
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delete printer;
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}
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void ApplicationWindow::newDoc()
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{
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ApplicationWindow *ed = new ApplicationWindow;
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ed->setCaption("Qt Example - Application");
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ed->show();
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}
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void ApplicationWindow::choose()
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{
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QString fn = QFileDialog::getOpenFileName( QString::null, QString::null,
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this);
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if ( !fn.isEmpty() )
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load( fn );
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else
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statusBar()->message( "Loading aborted", 2000 );
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}
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void ApplicationWindow::load( const QString &fileName )
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{
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QFile f( fileName );
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if ( !f.open( IO_ReadOnly ) )
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return;
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QTextStream ts( &f );
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e->setText( ts.read() );
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e->setModified( FALSE );
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setCaption( fileName );
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statusBar()->message( "Loaded document " + fileName, 2000 );
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}
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void ApplicationWindow::save()
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{
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if ( filename.isEmpty() ) {
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saveAs();
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return;
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}
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QString text = e->text();
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QFile f( filename );
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if ( !f.open( IO_WriteOnly ) ) {
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statusBar()->message( QString("Could not write to %1").arg(filename),
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2000 );
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return;
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}
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QTextStream t( &f );
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t << text;
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f.close();
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e->setModified( FALSE );
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setCaption( filename );
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statusBar()->message( QString( "File %1 saved" ).arg( filename ), 2000 );
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}
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void ApplicationWindow::saveAs()
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{
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QString fn = QFileDialog::getSaveFileName( QString::null, QString::null,
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this );
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if ( !fn.isEmpty() ) {
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filename = fn;
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save();
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} else {
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statusBar()->message( "Saving aborted", 2000 );
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}
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}
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void ApplicationWindow::print()
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{
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printer->setFullPage( TRUE );
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if ( printer->setup(this) ) { // printer dialog
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statusBar()->message( "Printing..." );
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QPainter p;
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if( !p.begin( printer ) ) { // paint on printer
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statusBar()->message( "Printing aborted", 2000 );
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return;
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}
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QPaintDeviceMetrics metrics( p.device() );
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int dpiy = metrics.logicalDpiY();
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int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
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QRect view( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
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QSimpleRichText richText( QStyleSheet::convertFromPlainText(e->text()),
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QFont(),
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e->context(),
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e->styleSheet(),
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e->mimeSourceFactory(),
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view.height() );
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richText.setWidth( &p, view.width() );
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int page = 1;
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do {
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richText.draw( &p, margin, margin, view, colorGroup() );
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view.moveBy( 0, view.height() );
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p.translate( 0 , -view.height() );
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p.drawText( view.right() - p.fontMetrics().width( QString::number( page ) ),
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view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) );
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if ( view.top() - margin >= richText.height() )
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break;
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printer->newPage();
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page++;
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} while (TRUE);
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statusBar()->message( "Printing completed", 2000 );
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} else {
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statusBar()->message( "Printing aborted", 2000 );
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}
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}
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void ApplicationWindow::closeEvent( QCloseEvent* ce )
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{
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if ( !e->isModified() ) {
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ce->accept();
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return;
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}
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switch( QMessageBox::information( this, "Qt Application Example",
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"Do you want to save the changes"
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" to the document?",
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"Yes", "No", "Cancel",
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0, 1 ) ) {
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case 0:
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save();
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ce->accept();
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break;
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case 1:
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ce->accept();
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break;
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case 2:
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default: // just for sanity
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ce->ignore();
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break;
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}
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}
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void ApplicationWindow::about()
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{
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QMessageBox::about( this, "Qt Application Example",
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"This example demonstrates simple use of "
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"QMainWindow,\nQMenuBar and QToolBar.");
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}
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void ApplicationWindow::aboutQt()
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{
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QMessageBox::aboutQt( this, "Qt Application Example" );
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}
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