source: trunk/examples/mdi/application.cpp@ 127

Last change on this file since 127 was 20, checked in by dmik, 20 years ago

Fixed a bunch of compiler warnings
  • Property svn:keywords set to Id
File size: 11.8 KB
Line 
1/****************************************************************************
2** $Id: application.cpp 20 2005-11-17 18:00:27Z 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#ifndef QT_NO_PRINTER
41#include "fileprint.xpm"
42#endif
43
44const char * fileOpenText = "Click this button to open a <em>new file</em>. <br><br>"
45"You can also select the <b>Open command</b> from the File menu.";
46const char * fileSaveText = "Click this button to save the file you are "
47"editing. You will be prompted for a file name.\n\n"
48"You can also select the Save command from the File menu.\n\n"
49"Note that implementing this function is left as an exercise for the reader.";
50const char * filePrintText = "Click this button to print the file you "
51"are editing.\n\n"
52"You can also select the Print command from the File menu.";
53
54ApplicationWindow::ApplicationWindow()
55 : QMainWindow( 0, "example application main window", WDestructiveClose )
56{
57 int id;
58
59 QPixmap openIcon, saveIcon;
60
61 fileTools = new QToolBar( this, "file operations" );
62 addToolBar( fileTools, tr( "File Operations" ), DockTop, TRUE );
63
64 openIcon = QPixmap( fileopen );
65 QToolButton * fileOpen
66 = new QToolButton( openIcon, "Open File", QString::null,
67 this, SLOT(load()), fileTools, "open file" );
68
69 saveIcon = QPixmap( filesave );
70 QToolButton * fileSave
71 = new QToolButton( saveIcon, "Save File", QString::null,
72 this, SLOT(save()), fileTools, "save file" );
73
74#ifndef QT_NO_PRINTER
75 printer = new QPrinter( QPrinter::HighResolution );
76 QPixmap printIcon;
77
78 printIcon = QPixmap( fileprint );
79 QToolButton * filePrint
80 = new QToolButton( printIcon, "Print File", QString::null,
81 this, SLOT(print()), fileTools, "print file" );
82 QWhatsThis::add( filePrint, filePrintText );
83#endif
84
85 (void)QWhatsThis::whatsThisButton( fileTools );
86
87 QWhatsThis::add( fileOpen, fileOpenText );
88 QWhatsThis::add( fileSave, fileSaveText );
89
90 QPopupMenu * file = new QPopupMenu( this );
91 menuBar()->insertItem( "&File", file );
92
93 file->insertItem( "&New", this, SLOT(newDoc()), CTRL+Key_N );
94
95 id = file->insertItem( openIcon, "&Open...",
96 this, SLOT(load()), CTRL+Key_O );
97 file->setWhatsThis( id, fileOpenText );
98
99 id = file->insertItem( saveIcon, "&Save",
100 this, SLOT(save()), CTRL+Key_S );
101 file->setWhatsThis( id, fileSaveText );
102 id = file->insertItem( "Save &As...", this, SLOT(saveAs()) );
103 file->setWhatsThis( id, fileSaveText );
104#ifndef QT_NO_PRINTER
105 file->insertSeparator();
106 id = file->insertItem( printIcon, "&Print...",
107 this, SLOT(print()), CTRL+Key_P );
108 file->setWhatsThis( id, filePrintText );
109#endif
110 file->insertSeparator();
111 file->insertItem( "&Close", this, SLOT(closeWindow()), CTRL+Key_W );
112 file->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q );
113
114 windowsMenu = new QPopupMenu( this );
115 windowsMenu->setCheckable( TRUE );
116 connect( windowsMenu, SIGNAL( aboutToShow() ),
117 this, SLOT( windowsMenuAboutToShow() ) );
118 menuBar()->insertItem( "&Windows", windowsMenu );
119
120 menuBar()->insertSeparator();
121 QPopupMenu * help = new QPopupMenu( this );
122 menuBar()->insertItem( "&Help", help );
123
124 help->insertItem( "&About", this, SLOT(about()), Key_F1);
125 help->insertItem( "About &Qt", this, SLOT(aboutQt()));
126 help->insertSeparator();
127 help->insertItem( "What's &This", this, SLOT(whatsThis()), SHIFT+Key_F1);
128
129 QVBox* vb = new QVBox( this );
130 vb->setFrameStyle( QFrame::StyledPanel | QFrame::Sunken );
131 ws = new QWorkspace( vb );
132 ws->setScrollBarsEnabled( TRUE );
133 setCentralWidget( vb );
134
135 statusBar()->message( "Ready", 2000 );
136}
137
138
139ApplicationWindow::~ApplicationWindow()
140{
141#ifndef QT_NO_PRINTER
142 delete printer;
143#endif
144}
145
146
147
148MDIWindow* ApplicationWindow::newDoc()
149{
150 MDIWindow* w = new MDIWindow( ws, 0, WDestructiveClose );
151 connect( w, SIGNAL( message(const QString&, int) ), statusBar(), SLOT( message(const QString&, int )) );
152 w->setCaption("unnamed document");
153 w->setIcon( QPixmap("document.xpm") );
154 // show the very first window in maximized mode
155 if ( ws->windowList().isEmpty() )
156 w->showMaximized();
157 else
158 w->show();
159 return w;
160}
161
162void ApplicationWindow::load()
163{
164 QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
165 if ( !fn.isEmpty() ) {
166 MDIWindow* w = newDoc();
167 w->load( fn );
168 } else {
169 statusBar()->message( "Loading aborted", 2000 );
170 }
171}
172
173void ApplicationWindow::save()
174{
175 MDIWindow* m = (MDIWindow*)ws->activeWindow();
176 if ( m )
177 m->save();
178}
179
180
181void ApplicationWindow::saveAs()
182{
183 MDIWindow* m = (MDIWindow*)ws->activeWindow();
184 if ( m )
185 m->saveAs();
186}
187
188
189void ApplicationWindow::print()
190{
191#ifndef QT_NO_PRINTER
192 MDIWindow* m = (MDIWindow*)ws->activeWindow();
193 if ( m )
194 m->print( printer );
195#endif
196}
197
198
199void ApplicationWindow::closeWindow()
200{
201 MDIWindow* m = (MDIWindow*)ws->activeWindow();
202 if ( m )
203 m->close();
204}
205
206void ApplicationWindow::about()
207{
208 QMessageBox::about( this, "Qt Application Example",
209 "This example demonstrates simple use of\n "
210 "Qt's Multiple Document Interface (MDI).");
211}
212
213
214void ApplicationWindow::aboutQt()
215{
216 QMessageBox::aboutQt( this, "Qt Application Example" );
217}
218
219
220void ApplicationWindow::windowsMenuAboutToShow()
221{
222 windowsMenu->clear();
223 int cascadeId = windowsMenu->insertItem("&Cascade", ws, SLOT(cascade() ) );
224 int tileId = windowsMenu->insertItem("&Tile", ws, SLOT(tile() ) );
225 int horTileId = windowsMenu->insertItem("Tile &Horizontally", this, SLOT(tileHorizontal() ) );
226 if ( ws->windowList().isEmpty() ) {
227 windowsMenu->setItemEnabled( cascadeId, FALSE );
228 windowsMenu->setItemEnabled( tileId, FALSE );
229 windowsMenu->setItemEnabled( horTileId, FALSE );
230 }
231 windowsMenu->insertSeparator();
232 QWidgetList windows = ws->windowList();
233 for ( int i = 0; i < int(windows.count()); ++i ) {
234 int id = windowsMenu->insertItem(windows.at(i)->caption(),
235 this, SLOT( windowsMenuActivated( int ) ) );
236 windowsMenu->setItemParameter( id, i );
237 windowsMenu->setItemChecked( id, ws->activeWindow() == windows.at(i) );
238 }
239}
240
241void ApplicationWindow::windowsMenuActivated( int id )
242{
243 QWidget* w = ws->windowList().at( id );
244 if ( w )
245 w->showNormal();
246 w->setFocus();
247}
248
249void ApplicationWindow::tileHorizontal()
250{
251 // primitive horizontal tiling
252 QWidgetList windows = ws->windowList();
253 if ( !windows.count() )
254 return;
255
256 int heightForEach = ws->height() / windows.count();
257 int y = 0;
258 for ( int i = 0; i < int(windows.count()); ++i ) {
259 QWidget *window = windows.at(i);
260 if ( window->testWState( WState_Maximized ) ) {
261 // prevent flicker
262 window->hide();
263 window->showNormal();
264 }
265 int preferredHeight = window->minimumHeight()+window->parentWidget()->baseSize().height();
266 int actHeight = QMAX(heightForEach, preferredHeight);
267
268 window->parentWidget()->setGeometry( 0, y, ws->width(), actHeight );
269 y += actHeight;
270 }
271}
272
273void ApplicationWindow::closeEvent( QCloseEvent *e )
274{
275 QWidgetList windows = ws->windowList();
276 if ( windows.count() ) {
277 for ( int i = 0; i < int(windows.count()); ++i ) {
278 QWidget *window = windows.at( i );
279 if ( !window->close() ) {
280 e->ignore();
281 return;
282 }
283 }
284 }
285
286 QMainWindow::closeEvent( e );
287}
288
289MDIWindow::MDIWindow( QWidget* parent, const char* name, int wflags )
290 : QMainWindow( parent, name, wflags )
291{
292 mmovie = 0;
293 medit = new QTextEdit( this );
294 setFocusProxy( medit );
295 setCentralWidget( medit );
296}
297
298MDIWindow::~MDIWindow()
299{
300 delete mmovie;
301}
302
303void MDIWindow::closeEvent( QCloseEvent *e )
304{
305 if ( medit->isModified() ) {
306 switch( QMessageBox::warning( this, "Save Changes",
307 tr("Save changes to %1?").arg( caption() ),
308 tr("Yes"), tr("No"), tr("Cancel") ) ) {
309 case 0:
310 {
311 save();
312 if ( !filename.isEmpty() )
313 e->accept();
314 else
315 e->ignore();
316 }
317 break;
318 case 1:
319 e->accept();
320 break;
321 default:
322 e->ignore();
323 break;
324 }
325 } else {
326 e->accept();
327 }
328}
329
330void MDIWindow::load( const QString& fn )
331{
332 filename = fn;
333 QFile f( filename );
334 if ( !f.open( IO_ReadOnly ) )
335 return;
336
337 if(fn.contains(".gif")) {
338 QWidget * tmp=new QWidget(this);
339 setFocusProxy(tmp);
340 setCentralWidget(tmp);
341 medit->hide();
342 delete medit;
343 QMovie * qm=new QMovie(fn);
344#ifdef Q_WS_QWS // temporary speed-test hack
345 qm->setDisplayWidget(tmp);
346#endif
347 tmp->setBackgroundMode(QWidget::NoBackground);
348 tmp->show();
349 mmovie=qm;
350 } else {
351 mmovie = 0;
352
353 QTextStream t(&f);
354 QString s = t.read();
355 medit->setText( s );
356 f.close();
357
358
359 }
360 setCaption( filename );
361 emit message( QString("Loaded document %1").arg(filename), 2000 );
362}
363
364void MDIWindow::save()
365{
366 if ( filename.isEmpty() ) {
367 saveAs();
368 return;
369 }
370
371 QString text = medit->text();
372 QFile f( filename );
373 if ( !f.open( IO_WriteOnly ) ) {
374 emit message( QString("Could not write to %1").arg(filename),
375 2000 );
376 return;
377 }
378
379 QTextStream t( &f );
380 t << text;
381 f.close();
382
383 setCaption( filename );
384
385 emit message( QString( "File %1 saved" ).arg( filename ), 2000 );
386}
387
388void MDIWindow::saveAs()
389{
390 QString fn = QFileDialog::getSaveFileName( filename, QString::null, this );
391 if ( !fn.isEmpty() ) {
392 filename = fn;
393 save();
394 } else {
395 emit message( "Saving aborted", 2000 );
396 }
397}
398
399void MDIWindow::print( QPrinter* printer)
400{
401#ifndef QT_NO_PRINTER
402 int pageNo = 1;
403
404 if ( printer->setup(this) ) { // printer dialog
405 printer->setFullPage( TRUE );
406 emit message( "Printing...", 0 );
407 QPainter p;
408 if ( !p.begin( printer ) )
409 return; // paint on printer
410 QPaintDeviceMetrics metrics( p.device() );
411 int dpiy = metrics.logicalDpiY();
412 int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
413 QRect body( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
414 QSimpleRichText richText( QStyleSheet::convertFromPlainText(medit->text()),
415 QFont(),
416 medit->context(),
417 medit->styleSheet(),
418 medit->mimeSourceFactory(),
419 body.height() );
420 richText.setWidth( &p, body.width() );
421 QRect view( body );
422 int page = 1;
423 do {
424 richText.draw( &p, body.left(), body.top(), view, colorGroup() );
425 view.moveBy( 0, body.height() );
426 p.translate( 0 , -body.height() );
427 p.drawText( view.right() - p.fontMetrics().width( QString::number( page ) ),
428 view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) );
429 if ( view.top() >= richText.height() )
430 break;
431 QString msg( "Printing (page " );
432 msg += QString::number( ++pageNo );
433 msg += ")...";
434 emit message( msg, 0 );
435 printer->newPage();
436 page++;
437 } while (TRUE);
438 }
439#endif
440}
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