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- /****************************************************************************
- ** $Id: qt/application.cpp 3.0.0 edited Jul 30 17:10 $
- **
- ** 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 "application.h"
-
- #include <qimage.h>
- #include <qpixmap.h>
- #include <qtoolbar.h>
- #include <qtoolbutton.h>
- #include <qpopupmenu.h>
- #include <qmenubar.h>
- #include <qtextedit.h>
- #include <qfile.h>
- #include <qfiledialog.h>
- #include <qstatusbar.h>
- #include <qmessagebox.h>
- #include <qprinter.h>
- #include <qapplication.h>
- #include <qaccel.h>
- #include <qtextstream.h>
- #include <qpainter.h>
- #include <qpaintdevicemetrics.h>
- #include <qwhatsthis.h>
- #include <qaction.h>
-
- #include "filesave.xpm"
- #include "fileopen.xpm"
- #include "fileprint.xpm"
-
-
- ApplicationWindow::ApplicationWindow()
- : QMainWindow( 0, "example application main window", WDestructiveClose )
- {
- printer = new QPrinter;
-
- QAction * fileNewAction;
- QAction * fileOpenAction;
- QAction * fileSaveAction, * fileSaveAsAction, * filePrintAction;
- QAction * fileCloseAction, * fileQuitAction;
-
- fileNewAction = new QAction( "New", "&New", CTRL+Key_N, this, "new" );
- connect( fileNewAction, SIGNAL( activated() ) , this,
- SLOT( newDoc() ) );
-
- fileOpenAction = new QAction( "Open File", QPixmap( fileopen ), "&Open",
- CTRL+Key_O, this, "open" );
- connect( fileOpenAction, SIGNAL( activated() ) , this, SLOT( choose() ) );
-
- const char * fileOpenText = "<p><img source=\"fileopen\"> "
- "Click this button to open a <em>new file</em>. <br>"
- "You can also select the <b>Open</b> command "
- "from the <b>File</b> menu.</p>";
- QMimeSourceFactory::defaultFactory()->setPixmap( "fileopen",
- fileOpenAction->iconSet().pixmap() );
- fileOpenAction->setWhatsThis( fileOpenText );
-
- fileSaveAction = new QAction( "Save File", QPixmap( filesave ),
- "&Save", CTRL+Key_S, this, "save" );
- connect( fileSaveAction, SIGNAL( activated() ) , this, SLOT( save() ) );
-
- const char * fileSaveText = "<p>Click this button to save the file you "
- "are editing. You will be prompted for a file name.\n"
- "You can also select the <b>Save</b> command "
- "from the <b>File</b> menu.</p>";
- fileSaveAction->setWhatsThis( fileSaveText );
-
- fileSaveAsAction = new QAction( "Save File As", "Save &as", 0, this,
- "save as" );
- connect( fileSaveAsAction, SIGNAL( activated() ) , this,
- SLOT( saveAs() ) );
- fileSaveAsAction->setWhatsThis( fileSaveText );
-
- filePrintAction = new QAction( "Print File", QPixmap( fileprint ),
- "&Print", CTRL+Key_P, this, "print" );
- connect( filePrintAction, SIGNAL( activated() ) , this,
- SLOT( print() ) );
-
- 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.";
- filePrintAction->setWhatsThis( filePrintText );
-
- fileCloseAction = new QAction( "Close", "&Close", CTRL+Key_W, this,
- "close" );
- connect( fileCloseAction, SIGNAL( activated() ) , this,
- SLOT( close() ) );
-
- fileQuitAction = new QAction( "Quit", "&Quit", CTRL+Key_Q, this,
- "quit" );
- connect( fileQuitAction, SIGNAL( activated() ) , qApp,
- SLOT( closeAllWindows() ) );
-
- // populate a tool bar with some actions
-
- QToolBar * fileTools = new QToolBar( this, "file operations" );
- fileTools->setLabel( "File Operations" );
- fileOpenAction->addTo( fileTools );
- fileSaveAction->addTo( fileTools );
- filePrintAction->addTo( fileTools );
- (void)QWhatsThis::whatsThisButton( fileTools );
-
-
- // populate a menu with all actions
-
- QPopupMenu * file = new QPopupMenu( this );
- menuBar()->insertItem( "&File", file );
- fileNewAction->addTo( file );
- fileOpenAction->addTo( file );
- fileSaveAction->addTo( file );
- fileSaveAsAction->addTo( file );
- file->insertSeparator();
- filePrintAction->addTo( file );
- file->insertSeparator();
- fileCloseAction->addTo( file );
- fileQuitAction->addTo( file );
-
-
- menuBar()->insertSeparator();
-
- // add a help menu
-
- QPopupMenu * help = new QPopupMenu( this );
- menuBar()->insertItem( "&Help", help );
- help->insertItem( "&About", this, SLOT(about()), Key_F1 );
- help->insertItem( "About &Qt", this, SLOT(aboutQt()) );
- help->insertSeparator();
- help->insertItem( "What's &This", this, SLOT(whatsThis()),
- SHIFT+Key_F1 );
-
-
- // create and define the central widget
-
- e = new QTextEdit( this, "editor" );
- e->setFocus();
- setCentralWidget( e );
- statusBar()->message( "Ready", 2000 );
-
- resize( 450, 600 );
- }
-
-
- ApplicationWindow::~ApplicationWindow()
- {
- delete printer;
- }
-
-
-
- void ApplicationWindow::newDoc()
- {
- ApplicationWindow *ed = new ApplicationWindow;
- ed->show();
- }
-
- void ApplicationWindow::choose()
- {
- QString fn = QFileDialog::getOpenFileName( QString::null, QString::null,
- this);
- if ( !fn.isEmpty() )
- load( fn );
- else
- statusBar()->message( "Loading aborted", 2000 );
- }
-
-
- void ApplicationWindow::load( const QString &fileName )
- {
- QFile f( fileName );
- if ( !f.open( IO_ReadOnly ) )
- return;
-
- QTextStream ts( &f );
- e->setText( ts.read() );
- e->setModified( FALSE );
- setCaption( fileName );
- statusBar()->message( "Loaded document " + fileName, 2000 );
- }
-
-
- void ApplicationWindow::save()
- {
- if ( filename.isEmpty() ) {
- saveAs();
- return;
- }
-
- QString text = e->text();
- QFile f( filename );
- if ( !f.open( IO_WriteOnly ) ) {
- statusBar()->message( QString("Could not write to %1").arg(filename),
- 2000 );
- return;
- }
-
- QTextStream t( &f );
- t << text;
- f.close();
-
- e->setModified( FALSE );
-
- setCaption( filename );
-
- statusBar()->message( QString( "File %1 saved" ).arg( filename ), 2000 );
- }
-
-
- void ApplicationWindow::saveAs()
- {
- QString fn = QFileDialog::getSaveFileName( QString::null, QString::null,
- this );
- if ( !fn.isEmpty() ) {
- filename = fn;
- save();
- } else {
- statusBar()->message( "Saving aborted", 2000 );
- }
- }
-
-
- void ApplicationWindow::print()
- {
- const int Margin = 10;
- int pageNo = 1;
-
- if ( printer->setup(this) ) { // printer dialog
- statusBar()->message( "Printing..." );
- QPainter p;
- if( !p.begin( printer ) ) // paint on printer
- return;
-
- p.setFont( e->font() );
- int yPos = 0; // y-position for each line
- QFontMetrics fm = p.fontMetrics();
- QPaintDeviceMetrics metrics( printer ); // need width/height
- // of printer surface
- for( int i = 0 ; i < e->lines() ; i++ ) {
- if ( Margin + yPos > metrics.height() - Margin ) {
- QString msg( "Printing (page " );
- msg += QString::number( ++pageNo );
- msg += ")...";
- statusBar()->message( msg );
- printer->newPage(); // no more room on this page
- yPos = 0; // back to top of page
- }
- p.drawText( Margin, Margin + yPos,
- metrics.width(), fm.lineSpacing(),
- ExpandTabs | DontClip,
- e->text( i ) );
- yPos = yPos + fm.lineSpacing();
- }
- p.end(); // send job to printer
- statusBar()->message( "Printing completed", 2000 );
- } else {
- statusBar()->message( "Printing aborted", 2000 );
- }
- }
-
- void ApplicationWindow::closeEvent( QCloseEvent* ce )
- {
- if ( !e->isModified() ) {
- ce->accept();
- return;
- }
-
- switch( QMessageBox::information( this, "Qt Application Example",
- "The document has been changed since "
- "the last save.",
- "Save Now", "Cancel", "Leave Anyway",
- 0, 1 ) ) {
- case 0:
- save();
- ce->accept();
- break;
- case 1:
- default: // just for sanity
- ce->ignore();
- break;
- case 2:
- ce->accept();
- break;
- }
- }
-
-
- void ApplicationWindow::about()
- {
- QMessageBox::about( this, "Qt Application Example",
- "This example demonstrates simple use of "
- "QMainWindow,\nQMenuBar and QToolBar.");
- }
-
-
- void ApplicationWindow::aboutQt()
- {
- QMessageBox::aboutQt( this, "Qt Application Example" );
- }
-