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Diffstat (limited to 'examples/mdi/application.cpp')
-rw-r--r-- | examples/mdi/application.cpp | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/examples/mdi/application.cpp b/examples/mdi/application.cpp new file mode 100644 index 0000000..39624eb --- /dev/null +++ b/examples/mdi/application.cpp @@ -0,0 +1,435 @@ +/**************************************************************************** +** +** Copyright (C) 1992-2008 Trolltech ASA. 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 <qworkspace.h> +#include <qimage.h> +#include <qpixmap.h> +#include <qtoolbar.h> +#include <qtoolbutton.h> +#include <qpopupmenu.h> +#include <qmenubar.h> +#include <qmovie.h> +#include <qfile.h> +#include <qfiledialog.h> +#include <qlabel.h> +#include <qstatusbar.h> +#include <qmessagebox.h> +#include <qprinter.h> +#include <qapplication.h> +#include <qpushbutton.h> +#include <qaccel.h> +#include <qtextstream.h> +#include <qtextedit.h> +#include <qpainter.h> +#include <qpaintdevicemetrics.h> +#include <qwhatsthis.h> +#include <qobjectlist.h> +#include <qvbox.h> +#include <qsimplerichtext.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() + : QMainWindow( 0, "example application main window", WDestructiveClose ) +{ + int id; + + QPixmap openIcon, saveIcon; + + fileTools = new QToolBar( this, "file operations" ); + addToolBar( fileTools, tr( "File Operations" ), DockTop, TRUE ); + + openIcon = QPixmap( fileopen ); + QToolButton * fileOpen + = new QToolButton( openIcon, "Open File", QString::null, + this, SLOT(load()), fileTools, "open file" ); + + saveIcon = QPixmap( filesave ); + QToolButton * fileSave + = new QToolButton( saveIcon, "Save File", QString::null, + this, SLOT(save()), fileTools, "save file" ); + +#ifndef QT_NO_PRINTER + printer = new QPrinter( QPrinter::HighResolution ); + QPixmap printIcon; + + printIcon = QPixmap( fileprint ); + QToolButton * filePrint + = new QToolButton( printIcon, "Print File", QString::null, + this, SLOT(print()), fileTools, "print file" ); + QWhatsThis::add( filePrint, filePrintText ); +#endif + + (void)QWhatsThis::whatsThisButton( fileTools ); + + QWhatsThis::add( fileOpen, fileOpenText ); + QWhatsThis::add( fileSave, fileSaveText ); + + QPopupMenu * file = new QPopupMenu( 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 QPopupMenu( this ); + windowsMenu->setCheckable( TRUE ); + connect( windowsMenu, SIGNAL( aboutToShow() ), + this, SLOT( windowsMenuAboutToShow() ) ); + menuBar()->insertItem( "&Windows", windowsMenu ); + + menuBar()->insertSeparator(); + 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); + + QVBox* vb = new QVBox( this ); + vb->setFrameStyle( QFrame::StyledPanel | QFrame::Sunken ); + ws = new QWorkspace( 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 QString&, int) ), statusBar(), SLOT( message(const QString&, int )) ); + w->setCaption("unnamed document"); + w->setIcon( QPixmap("document.xpm") ); + // show the very first window in maximized mode + if ( ws->windowList().isEmpty() ) + w->showMaximized(); + else + w->show(); + return w; +} + +void ApplicationWindow::load() +{ + QString fn = QFileDialog::getOpenFileName( QString::null, QString::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() +{ + QMessageBox::about( this, "Qt Application Example", + "This example demonstrates simple use of\n " + "Qt's Multiple Document Interface (MDI)."); +} + + +void ApplicationWindow::aboutQt() +{ + QMessageBox::aboutQt( this, "Qt 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(); + QWidgetList 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 ) +{ + QWidget* w = ws->windowList().at( id ); + if ( w ) + w->showNormal(); + w->setFocus(); +} + +void ApplicationWindow::tileHorizontal() +{ + // primitive horizontal tiling + QWidgetList 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 ) { + QWidget *window = windows.at(i); + int preferredHeight = window->minimumHeight()+window->parentWidget()->baseSize().height(); + int actHeight = QMAX(heightForEach, preferredHeight); + + window->parentWidget()->setGeometry( 0, y, ws->width(), actHeight ); + y += actHeight; + } +} + +void ApplicationWindow::closeEvent( QCloseEvent *e ) +{ + QWidgetList windows = ws->windowList(); + if ( windows.count() ) { + for ( int i = 0; i < int(windows.count()); ++i ) { + QWidget *window = windows.at( i ); + if ( !window->close() ) { + e->ignore(); + return; + } + } + } + + QMainWindow::closeEvent( e ); +} + +MDIWindow::MDIWindow( QWidget* parent, const char* name, int wflags ) + : QMainWindow( parent, name, wflags ) +{ + mmovie = 0; + medit = new QTextEdit( this ); + setFocusProxy( medit ); + setCentralWidget( medit ); +} + +MDIWindow::~MDIWindow() +{ + delete mmovie; +} + +void MDIWindow::closeEvent( QCloseEvent *e ) +{ + if ( medit->isModified() ) { + switch( QMessageBox::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 QString& fn ) +{ + filename = fn; + QFile f( filename ); + if ( !f.open( IO_ReadOnly ) ) + return; + + if(fn.contains(".gif")) { + QWidget * tmp=new QWidget(this); + setFocusProxy(tmp); + setCentralWidget(tmp); + medit->hide(); + delete medit; + QMovie * qm=new QMovie(fn); +#ifdef Q_WS_QWS // temporary speed-test hack + qm->setDisplayWidget(tmp); +#endif + tmp->setBackgroundMode(QWidget::NoBackground); + tmp->show(); + mmovie=qm; + } else { + mmovie = 0; + + QTextStream t(&f); + QString s = t.read(); + medit->setText( s ); + f.close(); + + + } + setCaption( filename ); + emit message( QString("Loaded document %1").arg(filename), 2000 ); +} + +void MDIWindow::save() +{ + if ( filename.isEmpty() ) { + saveAs(); + return; + } + + QString text = medit->text(); + QFile f( filename ); + if ( !f.open( IO_WriteOnly ) ) { + emit message( QString("Could not write to %1").arg(filename), + 2000 ); + return; + } + + QTextStream t( &f ); + t << text; + f.close(); + + setCaption( filename ); + + emit message( QString( "File %1 saved" ).arg( filename ), 2000 ); +} + +void MDIWindow::saveAs() +{ + QString fn = QFileDialog::getSaveFileName( filename, QString::null, this ); + if ( !fn.isEmpty() ) { + filename = fn; + save(); + } else { + emit message( "Saving aborted", 2000 ); + } +} + +void MDIWindow::print( QPrinter* printer) +{ +#ifndef QT_NO_PRINTER + int pageNo = 1; + + if ( printer->setup(this) ) { // printer dialog + printer->setFullPage( TRUE ); + emit message( "Printing...", 0 ); + QPainter p; + if ( !p.begin( printer ) ) + return; // paint on printer + QPaintDeviceMetrics metrics( p.device() ); + int dpiy = metrics.logicalDpiY(); + int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins + QRect view( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin ); + QSimpleRichText richText( QStyleSheet::convertFromPlainText(medit->text()), + QFont(), + 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( QString::number( page ) ), + view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) ); + if ( view.top() - margin >= richText.height() ) + break; + QString msg( "Printing (page " ); + msg += QString::number( ++pageNo ); + msg += ")..."; + emit message( msg, 0 ); + printer->newPage(); + page++; + } while (TRUE); + } +#endif +} |