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tqt3/examples/action/application.cpp

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/****************************************************************************
**
** Copyright (C) 1992-2008 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 <tqimage.h>
#include <tqpixmap.h>
#include <tqtoolbar.h>
#include <tqtoolbutton.h>
#include <tqpopupmenu.h>
#include <tqmenubar.h>
#include <tqtextedit.h>
#include <tqfile.h>
#include <tqfiledialog.h>
#include <tqstatusbar.h>
#include <ntqmessagebox.h>
#include <tqprinter.h>
#include <ntqapplication.h>
#include <tqaccel.h>
#include <tqtextstream.h>
#include <tqpainter.h>
#include <tqpaintdevicemetrics.h>
#include <tqwhatsthis.h>
#include <tqaction.h>
#include <tqsimplerichtext.h>
#include "filesave.xpm"
#include "fileopen.xpm"
#include "fileprint.xpm"
ApplicationWindow::ApplicationWindow()
: TQMainWindow( 0, "example application main window", WDestructiveClose )
{
printer = new TQPrinter( TQPrinter::HighResolution );
TQAction * fileNewAction;
TQAction * fileOpenAction;
TQAction * fileSaveAction, * fileSaveAsAction, * filePrintAction;
TQAction * fileCloseAction, * fileQuitAction;
fileNewAction = new TQAction( "&New", CTRL+Key_N, this, "new" );
connect( fileNewAction, TQ_SIGNAL( activated() ) , this,
TQ_SLOT( newDoc() ) );
fileOpenAction = new TQAction( TQPixmap( fileopen ), "&Open...",
CTRL+Key_O, this, "open" );
connect( fileOpenAction, TQ_SIGNAL( activated() ) , this, TQ_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>";
TQMimeSourceFactory::defaultFactory()->setPixmap( "document-open",
fileOpenAction->iconSet().pixmap() );
fileOpenAction->setWhatsThis( fileOpenText );
fileSaveAction = new TQAction( TQPixmap( filesave ),
"&Save", CTRL+Key_S, this, "save" );
connect( fileSaveAction, TQ_SIGNAL( activated() ) , this, TQ_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 TQAction( "Save File As", "Save &As...", 0, this,
"save as" );
connect( fileSaveAsAction, TQ_SIGNAL( activated() ) , this,
TQ_SLOT( saveAs() ) );
fileSaveAsAction->setWhatsThis( fileSaveText );
filePrintAction = new TQAction( "Print File", TQPixmap( fileprint ),
"&Print...", CTRL+Key_P, this, "print" );
connect( filePrintAction, TQ_SIGNAL( activated() ) , this,
TQ_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 TQAction( "Close", "&Close", CTRL+Key_W, this,
"close" );
connect( fileCloseAction, TQ_SIGNAL( activated() ) , this,
TQ_SLOT( close() ) );
fileQuitAction = new TQAction( "Quit", "&Quit", CTRL+Key_Q, this,
"quit" );
connect( fileQuitAction, TQ_SIGNAL( activated() ) , tqApp,
TQ_SLOT( closeAllWindows() ) );
// populate a tool bar with some actions
TQToolBar * fileTools = new TQToolBar( this, "file operations" );
fileTools->setLabel( "File Operations" );
fileOpenAction->addTo( fileTools );
fileSaveAction->addTo( fileTools );
filePrintAction->addTo( fileTools );
(void)TQWhatsThis::whatsThisButton( fileTools );
// populate a menu with all actions
TQPopupMenu * file = new TQPopupMenu( 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
TQPopupMenu * help = new TQPopupMenu( this );
menuBar()->insertItem( "&Help", help );
help->insertItem( "&About", this, TQ_SLOT(about()), Key_F1 );
help->insertItem( "About &TQt", this, TQ_SLOT(aboutTQt()) );
help->insertSeparator();
help->insertItem( "What's &This", this, TQ_SLOT(whatsThis()),
SHIFT+Key_F1 );
// create and define the central widget
e = new TQTextEdit( 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()
{
TQString fn = TQFileDialog::getOpenFileName( TQString::null, TQString::null,
this);
if ( !fn.isEmpty() )
load( fn );
else
statusBar()->message( "Loading aborted", 2000 );
}
void ApplicationWindow::load( const TQString &fileName )
{
TQFile f( fileName );
if ( !f.open( IO_ReadOnly ) )
return;
TQTextStream 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;
}
TQString text = e->text();
TQFile f( filename );
if ( !f.open( IO_WriteOnly ) ) {
statusBar()->message( TQString("Could not write to %1").arg(filename),
2000 );
return;
}
TQTextStream t( &f );
t << text;
f.close();
e->setModified( FALSE );
setCaption( filename );
statusBar()->message( TQString( "File %1 saved" ).arg( filename ), 2000 );
}
void ApplicationWindow::saveAs()
{
TQString fn = TQFileDialog::getSaveFileName( TQString::null, TQString::null,
this );
if ( !fn.isEmpty() ) {
filename = fn;
save();
} else {
statusBar()->message( "Saving aborted", 2000 );
}
}
void ApplicationWindow::print()
{
printer->setFullPage( TRUE );
if ( printer->setup(this) ) { // printer dialog
statusBar()->message( "Printing..." );
TQPainter p;
if( !p.begin( printer ) ) { // paint on printer
statusBar()->message( "Printing aborted", 2000 );
return;
}
TQPaintDeviceMetrics metrics( p.device() );
int dpiy = metrics.logicalDpiY();
int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
TQRect view( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
TQSimpleRichText richText( TQStyleSheet::convertFromPlainText(e->text()),
TQFont(),
e->context(),
e->styleSheet(),
e->mimeSourceFactory(),
view.height() );
richText.setWidth( &p, view.width() );
int page = 1;
do {
richText.draw( &p, margin, margin, view, colorGroup() );
view.moveBy( 0, view.height() );
p.translate( 0 , -view.height() );
p.drawText( view.right() - p.fontMetrics().width( TQString::number( page ) ),
view.bottom() + p.fontMetrics().ascent() + 5, TQString::number( page ) );
if ( view.top() - margin >= richText.height() )
break;
printer->newPage();
page++;
} while (TRUE);
statusBar()->message( "Printing completed", 2000 );
} else {
statusBar()->message( "Printing aborted", 2000 );
}
}
void ApplicationWindow::closeEvent( TQCloseEvent* ce )
{
if ( !e->isModified() ) {
ce->accept();
return;
}
switch( TQMessageBox::information( this, "TQt 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()
{
TQMessageBox::about( this, "TQt Application Example",
"This example demonstrates simple use of "
"TQMainWindow,\nTQMenuBar and TQToolBar.");
}
void ApplicationWindow::aboutTQt()
{
TQMessageBox::aboutTQt( this, "TQt Application Example" );
}