source: vendor/trolltech/3.3.1/examples/mdi/application.cpp

Last change on this file was 2, checked in by dmik, 20 years ago

Imported xplatform parts of the official release 3.3.1 from Trolltech
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File size: 11.8 KB
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1/****************************************************************************
2** $Id: application.cpp 2 2005-11-16 15:49:26Z dmik $
3**
4** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
5**
6** This file is part of an example program for Qt. This example
7** program may be used, distributed and modified without limitation.
8**
9*****************************************************************************/
10
11#include "application.h"
12#include <qworkspace.h>
13#include <qimage.h>
14#include <qpixmap.h>
15#include <qtoolbar.h>
16#include <qtoolbutton.h>
17#include <qpopupmenu.h>
18#include <qmenubar.h>
19#include <qmovie.h>
20#include <qfile.h>
21#include <qfiledialog.h>
22#include <qlabel.h>
23#include <qstatusbar.h>
24#include <qmessagebox.h>
25#include <qprinter.h>
26#include <qapplication.h>
27#include <qpushbutton.h>
28#include <qaccel.h>
29#include <qtextstream.h>
30#include <qtextedit.h>
31#include <qpainter.h>
32#include <qpaintdevicemetrics.h>
33#include <qwhatsthis.h>
34#include <qobjectlist.h>
35#include <qvbox.h>
36#include <qsimplerichtext.h>
37
38#include "filesave.xpm"
39#include "fileopen.xpm"
40#include "fileprint.xpm"
41
42
43const char * fileOpenText = "Click this button to open a <em>new file</em>. <br><br>"
44"You can also select the <b>Open command</b> from the File menu.";
45const char * fileSaveText = "Click this button to save the file you are "
46"editing. You will be prompted for a file name.\n\n"
47"You can also select the Save command from the File menu.\n\n"
48"Note that implementing this function is left as an exercise for the reader.";
49const char * filePrintText = "Click this button to print the file you "
50"are editing.\n\n"
51"You can also select the Print command from the File menu.";
52
53ApplicationWindow::ApplicationWindow()
54 : QMainWindow( 0, "example application main window", WDestructiveClose )
55{
56 int id;
57
58 QPixmap openIcon, saveIcon;
59
60 fileTools = new QToolBar( this, "file operations" );
61 addToolBar( fileTools, tr( "File Operations" ), DockTop, TRUE );
62
63 openIcon = QPixmap( fileopen );
64 QToolButton * fileOpen
65 = new QToolButton( openIcon, "Open File", QString::null,
66 this, SLOT(load()), fileTools, "open file" );
67
68 saveIcon = QPixmap( filesave );
69 QToolButton * fileSave
70 = new QToolButton( saveIcon, "Save File", QString::null,
71 this, SLOT(save()), fileTools, "save file" );
72
73#ifndef QT_NO_PRINTER
74 printer = new QPrinter( QPrinter::HighResolution );
75 QPixmap printIcon;
76
77 printIcon = QPixmap( fileprint );
78 QToolButton * filePrint
79 = new QToolButton( printIcon, "Print File", QString::null,
80 this, SLOT(print()), fileTools, "print file" );
81 QWhatsThis::add( filePrint, filePrintText );
82#endif
83
84 (void)QWhatsThis::whatsThisButton( fileTools );
85
86 QWhatsThis::add( fileOpen, fileOpenText );
87 QWhatsThis::add( fileSave, fileSaveText );
88
89 QPopupMenu * file = new QPopupMenu( this );
90 menuBar()->insertItem( "&File", file );
91
92 file->insertItem( "&New", this, SLOT(newDoc()), CTRL+Key_N );
93
94 id = file->insertItem( openIcon, "&Open...",
95 this, SLOT(load()), CTRL+Key_O );
96 file->setWhatsThis( id, fileOpenText );
97
98 id = file->insertItem( saveIcon, "&Save",
99 this, SLOT(save()), CTRL+Key_S );
100 file->setWhatsThis( id, fileSaveText );
101 id = file->insertItem( "Save &As...", this, SLOT(saveAs()) );
102 file->setWhatsThis( id, fileSaveText );
103#ifndef QT_NO_PRINTER
104 file->insertSeparator();
105 id = file->insertItem( printIcon, "&Print...",
106 this, SLOT(print()), CTRL+Key_P );
107 file->setWhatsThis( id, filePrintText );
108#endif
109 file->insertSeparator();
110 file->insertItem( "&Close", this, SLOT(closeWindow()), CTRL+Key_W );
111 file->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q );
112
113 windowsMenu = new QPopupMenu( this );
114 windowsMenu->setCheckable( TRUE );
115 connect( windowsMenu, SIGNAL( aboutToShow() ),
116 this, SLOT( windowsMenuAboutToShow() ) );
117 menuBar()->insertItem( "&Windows", windowsMenu );
118
119 menuBar()->insertSeparator();
120 QPopupMenu * help = new QPopupMenu( this );
121 menuBar()->insertItem( "&Help", help );
122
123 help->insertItem( "&About", this, SLOT(about()), Key_F1);
124 help->insertItem( "About &Qt", this, SLOT(aboutQt()));
125 help->insertSeparator();
126 help->insertItem( "What's &This", this, SLOT(whatsThis()), SHIFT+Key_F1);
127
128 QVBox* vb = new QVBox( this );
129 vb->setFrameStyle( QFrame::StyledPanel | QFrame::Sunken );
130 ws = new QWorkspace( vb );
131 ws->setScrollBarsEnabled( TRUE );
132 setCentralWidget( vb );
133
134 statusBar()->message( "Ready", 2000 );
135}
136
137
138ApplicationWindow::~ApplicationWindow()
139{
140#ifndef QT_NO_PRINTER
141 delete printer;
142#endif
143}
144
145
146
147MDIWindow* ApplicationWindow::newDoc()
148{
149 MDIWindow* w = new MDIWindow( ws, 0, WDestructiveClose );
150 connect( w, SIGNAL( message(const QString&, int) ), statusBar(), SLOT( message(const QString&, int )) );
151 w->setCaption("unnamed document");
152 w->setIcon( QPixmap("document.xpm") );
153 // show the very first window in maximized mode
154 if ( ws->windowList().isEmpty() )
155 w->showMaximized();
156 else
157 w->show();
158 return w;
159}
160
161void ApplicationWindow::load()
162{
163 QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
164 if ( !fn.isEmpty() ) {
165 MDIWindow* w = newDoc();
166 w->load( fn );
167 } else {
168 statusBar()->message( "Loading aborted", 2000 );
169 }
170}
171
172void ApplicationWindow::save()
173{
174 MDIWindow* m = (MDIWindow*)ws->activeWindow();
175 if ( m )
176 m->save();
177}
178
179
180void ApplicationWindow::saveAs()
181{
182 MDIWindow* m = (MDIWindow*)ws->activeWindow();
183 if ( m )
184 m->saveAs();
185}
186
187
188void ApplicationWindow::print()
189{
190#ifndef QT_NO_PRINTER
191 MDIWindow* m = (MDIWindow*)ws->activeWindow();
192 if ( m )
193 m->print( printer );
194#endif
195}
196
197
198void ApplicationWindow::closeWindow()
199{
200 MDIWindow* m = (MDIWindow*)ws->activeWindow();
201 if ( m )
202 m->close();
203}
204
205void ApplicationWindow::about()
206{
207 QMessageBox::about( this, "Qt Application Example",
208 "This example demonstrates simple use of\n "
209 "Qt's Multiple Document Interface (MDI).");
210}
211
212
213void ApplicationWindow::aboutQt()
214{
215 QMessageBox::aboutQt( this, "Qt Application Example" );
216}
217
218
219void ApplicationWindow::windowsMenuAboutToShow()
220{
221 windowsMenu->clear();
222 int cascadeId = windowsMenu->insertItem("&Cascade", ws, SLOT(cascade() ) );
223 int tileId = windowsMenu->insertItem("&Tile", ws, SLOT(tile() ) );
224 int horTileId = windowsMenu->insertItem("Tile &Horizontally", this, SLOT(tileHorizontal() ) );
225 if ( ws->windowList().isEmpty() ) {
226 windowsMenu->setItemEnabled( cascadeId, FALSE );
227 windowsMenu->setItemEnabled( tileId, FALSE );
228 windowsMenu->setItemEnabled( horTileId, FALSE );
229 }
230 windowsMenu->insertSeparator();
231 QWidgetList windows = ws->windowList();
232 for ( int i = 0; i < int(windows.count()); ++i ) {
233 int id = windowsMenu->insertItem(windows.at(i)->caption(),
234 this, SLOT( windowsMenuActivated( int ) ) );
235 windowsMenu->setItemParameter( id, i );
236 windowsMenu->setItemChecked( id, ws->activeWindow() == windows.at(i) );
237 }
238}
239
240void ApplicationWindow::windowsMenuActivated( int id )
241{
242 QWidget* w = ws->windowList().at( id );
243 if ( w )
244 w->showNormal();
245 w->setFocus();
246}
247
248void ApplicationWindow::tileHorizontal()
249{
250 // primitive horizontal tiling
251 QWidgetList windows = ws->windowList();
252 if ( !windows.count() )
253 return;
254
255 int heightForEach = ws->height() / windows.count();
256 int y = 0;
257 for ( int i = 0; i < int(windows.count()); ++i ) {
258 QWidget *window = windows.at(i);
259 if ( window->testWState( WState_Maximized ) ) {
260 // prevent flicker
261 window->hide();
262 window->showNormal();
263 }
264 int preferredHeight = window->minimumHeight()+window->parentWidget()->baseSize().height();
265 int actHeight = QMAX(heightForEach, preferredHeight);
266
267 window->parentWidget()->setGeometry( 0, y, ws->width(), actHeight );
268 y += actHeight;
269 }
270}
271
272void ApplicationWindow::closeEvent( QCloseEvent *e )
273{
274 QWidgetList windows = ws->windowList();
275 if ( windows.count() ) {
276 for ( int i = 0; i < int(windows.count()); ++i ) {
277 QWidget *window = windows.at( i );
278 if ( !window->close() ) {
279 e->ignore();
280 return;
281 }
282 }
283 }
284
285 QMainWindow::closeEvent( e );
286}
287
288MDIWindow::MDIWindow( QWidget* parent, const char* name, int wflags )
289 : QMainWindow( parent, name, wflags )
290{
291 mmovie = 0;
292 medit = new QTextEdit( this );
293 setFocusProxy( medit );
294 setCentralWidget( medit );
295}
296
297MDIWindow::~MDIWindow()
298{
299 delete mmovie;
300}
301
302void MDIWindow::closeEvent( QCloseEvent *e )
303{
304 if ( medit->isModified() ) {
305 switch( QMessageBox::warning( this, "Save Changes",
306 tr("Save changes to %1?").arg( caption() ),
307 tr("Yes"), tr("No"), tr("Cancel") ) ) {
308 case 0:
309 {
310 save();
311 if ( !filename.isEmpty() )
312 e->accept();
313 else
314 e->ignore();
315 }
316 break;
317 case 1:
318 e->accept();
319 break;
320 default:
321 e->ignore();
322 break;
323 }
324 } else {
325 e->accept();
326 }
327}
328
329void MDIWindow::load( const QString& fn )
330{
331 filename = fn;
332 QFile f( filename );
333 if ( !f.open( IO_ReadOnly ) )
334 return;
335
336 if(fn.contains(".gif")) {
337 QWidget * tmp=new QWidget(this);
338 setFocusProxy(tmp);
339 setCentralWidget(tmp);
340 medit->hide();
341 delete medit;
342 QMovie * qm=new QMovie(fn);
343#ifdef Q_WS_QWS // temporary speed-test hack
344 qm->setDisplayWidget(tmp);
345#endif
346 tmp->setBackgroundMode(QWidget::NoBackground);
347 tmp->show();
348 mmovie=qm;
349 } else {
350 mmovie = 0;
351
352 QTextStream t(&f);
353 QString s = t.read();
354 medit->setText( s );
355 f.close();
356
357
358 }
359 setCaption( filename );
360 emit message( QString("Loaded document %1").arg(filename), 2000 );
361}
362
363void MDIWindow::save()
364{
365 if ( filename.isEmpty() ) {
366 saveAs();
367 return;
368 }
369
370 QString text = medit->text();
371 QFile f( filename );
372 if ( !f.open( IO_WriteOnly ) ) {
373 emit message( QString("Could not write to %1").arg(filename),
374 2000 );
375 return;
376 }
377
378 QTextStream t( &f );
379 t << text;
380 f.close();
381
382 setCaption( filename );
383
384 emit message( QString( "File %1 saved" ).arg( filename ), 2000 );
385}
386
387void MDIWindow::saveAs()
388{
389 QString fn = QFileDialog::getSaveFileName( filename, QString::null, this );
390 if ( !fn.isEmpty() ) {
391 filename = fn;
392 save();
393 } else {
394 emit message( "Saving aborted", 2000 );
395 }
396}
397
398void MDIWindow::print( QPrinter* printer)
399{
400#ifndef QT_NO_PRINTER
401 int pageNo = 1;
402
403 if ( printer->setup(this) ) { // printer dialog
404 printer->setFullPage( TRUE );
405 emit message( "Printing...", 0 );
406 QPainter p;
407 if ( !p.begin( printer ) )
408 return; // paint on printer
409 QPaintDeviceMetrics metrics( p.device() );
410 int dpiy = metrics.logicalDpiY();
411 int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
412 QRect body( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
413 QSimpleRichText richText( QStyleSheet::convertFromPlainText(medit->text()),
414 QFont(),
415 medit->context(),
416 medit->styleSheet(),
417 medit->mimeSourceFactory(),
418 body.height() );
419 richText.setWidth( &p, body.width() );
420 QRect view( body );
421 int page = 1;
422 do {
423 richText.draw( &p, body.left(), body.top(), view, colorGroup() );
424 view.moveBy( 0, body.height() );
425 p.translate( 0 , -body.height() );
426 p.drawText( view.right() - p.fontMetrics().width( QString::number( page ) ),
427 view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) );
428 if ( view.top() >= richText.height() )
429 break;
430 QString msg( "Printing (page " );
431 msg += QString::number( ++pageNo );
432 msg += ")...";
433 emit message( msg, 0 );
434 printer->newPage();
435 page++;
436 } while (TRUE);
437 }
438#endif
439}
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