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tqt3/examples/mdi/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 <ntqworkspace.h>
#include <ntqimage.h>
#include <ntqpixmap.h>
#include <ntqtoolbar.h>
#include <ntqtoolbutton.h>
#include <ntqpopupmenu.h>
#include <ntqmenubar.h>
#include <ntqmovie.h>
#include <ntqfile.h>
#include <ntqfiledialog.h>
#include <ntqlabel.h>
#include <ntqstatusbar.h>
#include <ntqmessagebox.h>
#include <ntqprinter.h>
#include <ntqapplication.h>
#include <ntqpushbutton.h>
#include <ntqaccel.h>
#include <ntqtextstream.h>
#include <ntqtextedit.h>
#include <ntqpainter.h>
#include <ntqpaintdevicemetrics.h>
#include <ntqwhatsthis.h>
#include <ntqobjectlist.h>
#include <ntqvbox.h>
#include <ntqsimplerichtext.h>
#include "filesave.xpm"
#include "fileopen.xpm"
#include "fileprint.xpm"
const char * fileOpenText = "Click this button to open a <em>new file</em>. <br><br>"
"You can also select the <b>Open command</b> 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.";
ApplicationWindow::ApplicationWindow()
: TQMainWindow( 0, "example application main window", WDestructiveClose )
{
int id;
TQPixmap openIcon, saveIcon;
fileTools = new TQToolBar( this, "file operations" );
addToolBar( fileTools, tr( "File Operations" ), DockTop, TRUE );
openIcon = TQPixmap( fileopen );
TQToolButton * fileOpen
= new TQToolButton( openIcon, "Open File", TQString::null,
this, SLOT(load()), fileTools, "open file" );
saveIcon = TQPixmap( filesave );
TQToolButton * fileSave
= new TQToolButton( saveIcon, "Save File", TQString::null,
this, SLOT(save()), fileTools, "save file" );
#ifndef QT_NO_PRINTER
printer = new TQPrinter( TQPrinter::HighResolution );
TQPixmap printIcon;
printIcon = TQPixmap( fileprint );
TQToolButton * filePrint
= new TQToolButton( printIcon, "Print File", TQString::null,
this, SLOT(print()), fileTools, "print file" );
TQWhatsThis::add( filePrint, filePrintText );
#endif
(void)TQWhatsThis::whatsThisButton( fileTools );
TQWhatsThis::add( fileOpen, fileOpenText );
TQWhatsThis::add( fileSave, fileSaveText );
TQPopupMenu * file = new TQPopupMenu( this );
menuBar()->insertItem( "&File", file );
file->insertItem( "&New", this, SLOT(newDoc()), CTRL+Key_N );
id = file->insertItem( openIcon, "&Open...",
this, SLOT(load()), CTRL+Key_O );
file->setWhatsThis( id, fileOpenText );
id = file->insertItem( saveIcon, "&Save",
this, SLOT(save()), CTRL+Key_S );
file->setWhatsThis( id, fileSaveText );
id = file->insertItem( "Save &As...", this, SLOT(saveAs()) );
file->setWhatsThis( id, fileSaveText );
#ifndef QT_NO_PRINTER
file->insertSeparator();
id = file->insertItem( printIcon, "&Print...",
this, SLOT(print()), CTRL+Key_P );
file->setWhatsThis( id, filePrintText );
#endif
file->insertSeparator();
file->insertItem( "&Close", this, SLOT(closeWindow()), CTRL+Key_W );
file->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q );
windowsMenu = new TQPopupMenu( this );
windowsMenu->setCheckable( TRUE );
connect( windowsMenu, SIGNAL( aboutToShow() ),
this, SLOT( windowsMenuAboutToShow() ) );
menuBar()->insertItem( "&Windows", windowsMenu );
menuBar()->insertSeparator();
TQPopupMenu * help = new TQPopupMenu( this );
menuBar()->insertItem( "&Help", help );
help->insertItem( "&About", this, SLOT(about()), Key_F1);
help->insertItem( "About &TQt", this, SLOT(aboutTQt()));
help->insertSeparator();
help->insertItem( "What's &This", this, SLOT(whatsThis()), SHIFT+Key_F1);
TQVBox* vb = new TQVBox( this );
vb->setFrameStyle( TQFrame::StyledPanel | TQFrame::Sunken );
ws = new TQWorkspace( vb );
ws->setScrollBarsEnabled( TRUE );
setCentralWidget( vb );
statusBar()->message( "Ready", 2000 );
}
ApplicationWindow::~ApplicationWindow()
{
#ifndef QT_NO_PRINTER
delete printer;
#endif
}
MDIWindow* ApplicationWindow::newDoc()
{
MDIWindow* w = new MDIWindow( ws, 0, WDestructiveClose );
connect( w, SIGNAL( message(const TQString&, int) ), statusBar(), SLOT( message(const TQString&, int )) );
w->setCaption("unnamed document");
w->setIcon( TQPixmap("document.xpm") );
// show the very first window in maximized mode
if ( ws->windowList().isEmpty() )
w->showMaximized();
else
w->show();
return w;
}
void ApplicationWindow::load()
{
TQString fn = TQFileDialog::getOpenFileName( TQString::null, TQString::null, this );
if ( !fn.isEmpty() ) {
MDIWindow* w = newDoc();
w->load( fn );
} else {
statusBar()->message( "Loading aborted", 2000 );
}
}
void ApplicationWindow::save()
{
MDIWindow* m = (MDIWindow*)ws->activeWindow();
if ( m )
m->save();
}
void ApplicationWindow::saveAs()
{
MDIWindow* m = (MDIWindow*)ws->activeWindow();
if ( m )
m->saveAs();
}
void ApplicationWindow::print()
{
#ifndef QT_NO_PRINTER
MDIWindow* m = (MDIWindow*)ws->activeWindow();
if ( m )
m->print( printer );
#endif
}
void ApplicationWindow::closeWindow()
{
MDIWindow* m = (MDIWindow*)ws->activeWindow();
if ( m )
m->close();
}
void ApplicationWindow::about()
{
TQMessageBox::about( this, "TQt Application Example",
"This example demonstrates simple use of\n "
"TQt's Multiple Document Interface (MDI).");
}
void ApplicationWindow::aboutTQt()
{
TQMessageBox::aboutTQt( this, "TQt Application Example" );
}
void ApplicationWindow::windowsMenuAboutToShow()
{
windowsMenu->clear();
int cascadeId = windowsMenu->insertItem("&Cascade", ws, SLOT(cascade() ) );
int tileId = windowsMenu->insertItem("&Tile", ws, SLOT(tile() ) );
int horTileId = windowsMenu->insertItem("Tile &Horizontally", this, SLOT(tileHorizontal() ) );
if ( ws->windowList().isEmpty() ) {
windowsMenu->setItemEnabled( cascadeId, FALSE );
windowsMenu->setItemEnabled( tileId, FALSE );
windowsMenu->setItemEnabled( horTileId, FALSE );
}
windowsMenu->insertSeparator();
TQWidgetList windows = ws->windowList();
for ( int i = 0; i < int(windows.count()); ++i ) {
int id = windowsMenu->insertItem(windows.at(i)->caption(),
this, SLOT( windowsMenuActivated( int ) ) );
windowsMenu->setItemParameter( id, i );
windowsMenu->setItemChecked( id, ws->activeWindow() == windows.at(i) );
}
}
void ApplicationWindow::windowsMenuActivated( int id )
{
TQWidget* w = ws->windowList().at( id );
if ( w )
w->showNormal();
w->setFocus();
}
void ApplicationWindow::tileHorizontal()
{
// primitive horizontal tiling
TQWidgetList windows = ws->windowList();
if ( !windows.count() )
return;
if (ws->activeWindow())
ws->activeWindow()->showNormal();
int heightForEach = ws->height() / windows.count();
int y = 0;
for ( int i = 0; i < int(windows.count()); ++i ) {
TQWidget *window = windows.at(i);
int preferredHeight = window->minimumHeight()+window->parentWidget()->baseSize().height();
int actHeight = TQMAX(heightForEach, preferredHeight);
window->parentWidget()->setGeometry( 0, y, ws->width(), actHeight );
y += actHeight;
}
}
void ApplicationWindow::closeEvent( TQCloseEvent *e )
{
TQWidgetList windows = ws->windowList();
if ( windows.count() ) {
for ( int i = 0; i < int(windows.count()); ++i ) {
TQWidget *window = windows.at( i );
if ( !window->close() ) {
e->ignore();
return;
}
}
}
TQMainWindow::closeEvent( e );
}
MDIWindow::MDIWindow( TQWidget* parent, const char* name, int wflags )
: TQMainWindow( parent, name, wflags )
{
mmovie = 0;
medit = new TQTextEdit( this );
setFocusProxy( medit );
setCentralWidget( medit );
}
MDIWindow::~MDIWindow()
{
delete mmovie;
}
void MDIWindow::closeEvent( TQCloseEvent *e )
{
if ( medit->isModified() ) {
switch( TQMessageBox::warning( this, "Save Changes",
tr("Save changes to %1?").arg( caption() ),
tr("Yes"), tr("No"), tr("Cancel") ) ) {
case 0:
{
save();
if ( !filename.isEmpty() )
e->accept();
else
e->ignore();
}
break;
case 1:
e->accept();
break;
default:
e->ignore();
break;
}
} else {
e->accept();
}
}
void MDIWindow::load( const TQString& fn )
{
filename = fn;
TQFile f( filename );
if ( !f.open( IO_ReadOnly ) )
return;
if(fn.contains(".gif")) {
TQWidget * tmp=new TQWidget(this);
setFocusProxy(tmp);
setCentralWidget(tmp);
medit->hide();
delete medit;
TQMovie * qm=new TQMovie(fn);
#ifdef Q_WS_QWS // temporary speed-test hack
qm->setDisplayWidget(tmp);
#endif
tmp->setBackgroundMode(TQWidget::NoBackground);
tmp->show();
mmovie=qm;
} else {
mmovie = 0;
TQTextStream t(&f);
TQString s = t.read();
medit->setText( s );
f.close();
}
setCaption( filename );
emit message( TQString("Loaded document %1").arg(filename), 2000 );
}
void MDIWindow::save()
{
if ( filename.isEmpty() ) {
saveAs();
return;
}
TQString text = medit->text();
TQFile f( filename );
if ( !f.open( IO_WriteOnly ) ) {
emit message( TQString("Could not write to %1").arg(filename),
2000 );
return;
}
TQTextStream t( &f );
t << text;
f.close();
setCaption( filename );
emit message( TQString( "File %1 saved" ).arg( filename ), 2000 );
}
void MDIWindow::saveAs()
{
TQString fn = TQFileDialog::getSaveFileName( filename, TQString::null, this );
if ( !fn.isEmpty() ) {
filename = fn;
save();
} else {
emit message( "Saving aborted", 2000 );
}
}
void MDIWindow::print( TQPrinter* printer)
{
#ifndef QT_NO_PRINTER
int pageNo = 1;
if ( printer->setup(this) ) { // printer dialog
printer->setFullPage( TRUE );
emit message( "Printing...", 0 );
TQPainter p;
if ( !p.begin( printer ) )
return; // paint on printer
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(medit->text()),
TQFont(),
medit->context(),
medit->styleSheet(),
medit->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;
TQString msg( "Printing (page " );
msg += TQString::number( ++pageNo );
msg += ")...";
emit message( msg, 0 );
printer->newPage();
page++;
} while (TRUE);
}
#endif
}