source: trunk/examples/action/application.cpp@ 10

Last change on this file since 10 was 8, checked in by dmik, 20 years ago

Transferred Qt for OS/2 version 3.3.1-rc5 sources from the CVS
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1/****************************************************************************
2** $Id: application.cpp 8 2005-11-16 19:36:46Z 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
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 <qtextedit.h>
20#include <qfile.h>
21#include <qfiledialog.h>
22#include <qstatusbar.h>
23#include <qmessagebox.h>
24#include <qprinter.h>
25#include <qapplication.h>
26#include <qaccel.h>
27#include <qtextstream.h>
28#include <qpainter.h>
29#include <qpaintdevicemetrics.h>
30#include <qwhatsthis.h>
31#include <qaction.h>
32#include <qsimplerichtext.h>
33
34#include "filesave.xpm"
35#include "fileopen.xpm"
36#ifndef QT_NO_PRINTER
37#include "fileprint.xpm"
38#endif
39
40
41ApplicationWindow::ApplicationWindow()
42 : QMainWindow( 0, "example application main window", WDestructiveClose )
43{
44#ifndef QT_NO_PRINTER
45 printer = new QPrinter( QPrinter::HighResolution );
46#endif
47
48 QAction * fileNewAction;
49 QAction * fileOpenAction;
50 QAction * fileSaveAction, * fileSaveAsAction, * filePrintAction;
51 QAction * fileCloseAction, * fileQuitAction;
52
53 fileNewAction = new QAction( "&New", CTRL+Key_N, this, "new" );
54 connect( fileNewAction, SIGNAL( activated() ) , this,
55 SLOT( newDoc() ) );
56
57 fileOpenAction = new QAction( QPixmap( fileopen ), "&Open...",
58 CTRL+Key_O, this, "open" );
59 connect( fileOpenAction, SIGNAL( activated() ) , this, SLOT( choose() ) );
60
61 const char * fileOpenText = "<p><img source=\"fileopen\"> "
62 "Click this button to open a <em>new file</em>. <br>"
63 "You can also select the <b>Open</b> command "
64 "from the <b>File</b> menu.</p>";
65 QMimeSourceFactory::defaultFactory()->setPixmap( "fileopen",
66 fileOpenAction->iconSet().pixmap() );
67 fileOpenAction->setWhatsThis( fileOpenText );
68
69 fileSaveAction = new QAction( QPixmap( filesave ),
70 "&Save", CTRL+Key_S, this, "save" );
71 connect( fileSaveAction, SIGNAL( activated() ) , this, SLOT( save() ) );
72
73 const char * fileSaveText = "<p>Click this button to save the file you "
74 "are editing. You will be prompted for a file name.\n"
75 "You can also select the <b>Save</b> command "
76 "from the <b>File</b> menu.</p>";
77 fileSaveAction->setWhatsThis( fileSaveText );
78
79 fileSaveAsAction = new QAction( "Save File As", "Save &As...", 0, this,
80 "save as" );
81 connect( fileSaveAsAction, SIGNAL( activated() ) , this,
82 SLOT( saveAs() ) );
83 fileSaveAsAction->setWhatsThis( fileSaveText );
84
85#ifndef QT_NO_PRINTER
86 filePrintAction = new QAction( "Print File", QPixmap( fileprint ),
87 "&Print...", CTRL+Key_P, this, "print" );
88 connect( filePrintAction, SIGNAL( activated() ) , this,
89 SLOT( print() ) );
90
91 const char * filePrintText = "Click this button to print the file you "
92 "are editing.\n You can also select the Print "
93 "command from the File menu.";
94 filePrintAction->setWhatsThis( filePrintText );
95#else
96 Q_UNUSED( filePrintAction )
97#endif
98
99 fileCloseAction = new QAction( "Close", "&Close", CTRL+Key_W, this,
100 "close" );
101 connect( fileCloseAction, SIGNAL( activated() ) , this,
102 SLOT( close() ) );
103
104 fileQuitAction = new QAction( "Quit", "&Quit", CTRL+Key_Q, this,
105 "quit" );
106 connect( fileQuitAction, SIGNAL( activated() ) , qApp,
107 SLOT( closeAllWindows() ) );
108
109 // populate a tool bar with some actions
110
111 QToolBar * fileTools = new QToolBar( this, "file operations" );
112 fileTools->setLabel( "File Operations" );
113 fileOpenAction->addTo( fileTools );
114 fileSaveAction->addTo( fileTools );
115#ifndef QT_NO_PRINTER
116 filePrintAction->addTo( fileTools );
117#endif
118 (void)QWhatsThis::whatsThisButton( fileTools );
119
120
121 // populate a menu with all actions
122
123 QPopupMenu * file = new QPopupMenu( this );
124 menuBar()->insertItem( "&File", file );
125 fileNewAction->addTo( file );
126 fileOpenAction->addTo( file );
127 fileSaveAction->addTo( file );
128 fileSaveAsAction->addTo( file );
129#ifndef QT_NO_PRINTER
130 file->insertSeparator();
131 filePrintAction->addTo( file );
132#endif
133 file->insertSeparator();
134 fileCloseAction->addTo( file );
135 fileQuitAction->addTo( file );
136
137
138 menuBar()->insertSeparator();
139
140 // add a help menu
141
142 QPopupMenu * help = new QPopupMenu( this );
143 menuBar()->insertItem( "&Help", help );
144 help->insertItem( "&About", this, SLOT(about()), Key_F1 );
145 help->insertItem( "About &Qt", this, SLOT(aboutQt()) );
146 help->insertSeparator();
147 help->insertItem( "What's &This", this, SLOT(whatsThis()),
148 SHIFT+Key_F1 );
149
150
151 // create and define the central widget
152
153 e = new QTextEdit( this, "editor" );
154 e->setFocus();
155 setCentralWidget( e );
156 statusBar()->message( "Ready", 2000 );
157
158 resize( 450, 600 );
159}
160
161
162ApplicationWindow::~ApplicationWindow()
163{
164#ifndef QT_NO_PRINTER
165 delete printer;
166#endif
167}
168
169
170
171void ApplicationWindow::newDoc()
172{
173 ApplicationWindow *ed = new ApplicationWindow;
174 ed->show();
175}
176
177void ApplicationWindow::choose()
178{
179 QString fn = QFileDialog::getOpenFileName( QString::null, QString::null,
180 this);
181 if ( !fn.isEmpty() )
182 load( fn );
183 else
184 statusBar()->message( "Loading aborted", 2000 );
185}
186
187
188void ApplicationWindow::load( const QString &fileName )
189{
190 QFile f( fileName );
191 if ( !f.open( IO_ReadOnly ) )
192 return;
193
194 QTextStream ts( &f );
195 e->setText( ts.read() );
196 e->setModified( FALSE );
197 setCaption( fileName );
198 statusBar()->message( "Loaded document " + fileName, 2000 );
199}
200
201
202void ApplicationWindow::save()
203{
204 if ( filename.isEmpty() ) {
205 saveAs();
206 return;
207 }
208
209 QString text = e->text();
210 QFile f( filename );
211 if ( !f.open( IO_WriteOnly ) ) {
212 statusBar()->message( QString("Could not write to %1").arg(filename),
213 2000 );
214 return;
215 }
216
217 QTextStream t( &f );
218 t << text;
219 f.close();
220
221 e->setModified( FALSE );
222
223 setCaption( filename );
224
225 statusBar()->message( QString( "File %1 saved" ).arg( filename ), 2000 );
226}
227
228
229void ApplicationWindow::saveAs()
230{
231 QString fn = QFileDialog::getSaveFileName( QString::null, QString::null,
232 this );
233 if ( !fn.isEmpty() ) {
234 filename = fn;
235 save();
236 } else {
237 statusBar()->message( "Saving aborted", 2000 );
238 }
239}
240
241
242void ApplicationWindow::print()
243{
244#ifndef QT_NO_PRINTER
245 printer->setFullPage( TRUE );
246 if ( printer->setup(this) ) { // printer dialog
247 statusBar()->message( "Printing..." );
248 QPainter p;
249 if( !p.begin( printer ) ) { // paint on printer
250 statusBar()->message( "Printing aborted", 2000 );
251 return;
252 }
253
254 QPaintDeviceMetrics metrics( p.device() );
255 int dpiy = metrics.logicalDpiY();
256 int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
257 QRect body( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
258 QSimpleRichText richText( QStyleSheet::convertFromPlainText(e->text()),
259 QFont(),
260 e->context(),
261 e->styleSheet(),
262 e->mimeSourceFactory(),
263 body.height() );
264 richText.setWidth( &p, body.width() );
265 QRect view( body );
266 int page = 1;
267 do {
268 richText.draw( &p, body.left(), body.top(), view, colorGroup() );
269 view.moveBy( 0, body.height() );
270 p.translate( 0 , -body.height() );
271 p.drawText( view.right() - p.fontMetrics().width( QString::number( page ) ),
272 view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) );
273 if ( view.top() >= richText.height() )
274 break;
275 printer->newPage();
276 page++;
277 } while (TRUE);
278
279 statusBar()->message( "Printing completed", 2000 );
280 } else {
281 statusBar()->message( "Printing aborted", 2000 );
282 }
283#endif
284}
285
286void ApplicationWindow::closeEvent( QCloseEvent* ce )
287{
288 if ( !e->isModified() ) {
289 ce->accept();
290 return;
291 }
292
293 switch( QMessageBox::information( this, "Qt Application Example",
294 "The document has been changed since "
295 "the last save.",
296 "Save Now", "Cancel", "Leave Anyway",
297 0, 1 ) ) {
298 case 0:
299 save();
300 ce->accept();
301 break;
302 case 1:
303 default: // just for sanity
304 ce->ignore();
305 break;
306 case 2:
307 ce->accept();
308 break;
309 }
310}
311
312
313void ApplicationWindow::about()
314{
315 QMessageBox::about( this, "Qt Application Example",
316 "This example demonstrates simple use of "
317 "QMainWindow,\nQMenuBar and QToolBar.");
318}
319
320
321void ApplicationWindow::aboutQt()
322{
323 QMessageBox::aboutQt( this, "Qt Application Example" );
324}
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