source: trunk/examples/application/application.cpp@ 138

Last change on this file since 138 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) 1992-2002 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 <qsimplerichtext.h>
32
33#include "filesave.xpm"
34#include "fileopen.xpm"
35#ifndef QT_NO_PRINTER
36#include "fileprint.xpm"
37#endif
38
39ApplicationWindow::ApplicationWindow()
40 : QMainWindow( 0, "example application main window", WDestructiveClose | WGroupLeader )
41{
42#ifndef QT_NO_PRINTER
43 printer = new QPrinter( QPrinter::HighResolution );
44#endif
45 QPixmap openIcon, saveIcon, printIcon;
46
47 QToolBar * fileTools = new QToolBar( this, "file operations" );
48 fileTools->setLabel( "File Operations" );
49
50 openIcon = QPixmap( fileopen );
51 QToolButton * fileOpen
52 = new QToolButton( openIcon, "Open File", QString::null,
53 this, SLOT(choose()), fileTools, "open file" );
54
55 saveIcon = QPixmap( filesave );
56 QToolButton * fileSave
57 = new QToolButton( saveIcon, "Save File", QString::null,
58 this, SLOT(save()), fileTools, "save file" );
59
60#ifndef QT_NO_PRINTER
61 printIcon = QPixmap( fileprint );
62 QToolButton * filePrint
63 = new QToolButton( printIcon, "Print File", QString::null,
64 this, SLOT(print()), fileTools, "print file" );
65#else
66 Q_UNUSED( printIcon )
67#endif
68
69
70 (void)QWhatsThis::whatsThisButton( fileTools );
71
72 const char * fileOpenText = "<p><img source=\"fileopen\"> "
73 "Click this button to open a <em>new file</em>.<br>"
74 "You can also select the <b>Open</b> command "
75 "from the <b>File</b> menu.</p>";
76
77 QWhatsThis::add( fileOpen, fileOpenText );
78
79 QMimeSourceFactory::defaultFactory()->setPixmap( "fileopen", openIcon );
80
81 const char * fileSaveText = "<p>Click this button to save the file you "
82 "are editing. You will be prompted for a file name.\n"
83 "You can also select the <b>Save</b> command "
84 "from the <b>File</b> menu.</p>";
85
86 QWhatsThis::add( fileSave, fileSaveText );
87
88#ifndef QT_NO_PRINTER
89 const char * filePrintText = "Click this button to print the file you "
90 "are editing.\n"
91 "You can also select the Print command "
92 "from the File menu.";
93
94 QWhatsThis::add( filePrint, filePrintText );
95#endif
96
97
98 QPopupMenu * file = new QPopupMenu( this );
99 menuBar()->insertItem( "&File", file );
100
101
102 file->insertItem( "&New", this, SLOT(newDoc()), CTRL+Key_N );
103
104 int id;
105 id = file->insertItem( openIcon, "&Open...",
106 this, SLOT(choose()), CTRL+Key_O );
107 file->setWhatsThis( id, fileOpenText );
108
109 id = file->insertItem( saveIcon, "&Save",
110 this, SLOT(save()), CTRL+Key_S );
111 file->setWhatsThis( id, fileSaveText );
112
113 id = file->insertItem( "Save &As...", this, SLOT(saveAs()) );
114 file->setWhatsThis( id, fileSaveText );
115
116#ifndef QT_NO_PRINTER
117 file->insertSeparator();
118
119 id = file->insertItem( printIcon, "&Print...",
120 this, SLOT(print()), CTRL+Key_P );
121 file->setWhatsThis( id, filePrintText );
122#endif
123
124 file->insertSeparator();
125
126 file->insertItem( "&Close", this, SLOT(close()), CTRL+Key_W );
127
128 file->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q );
129
130 menuBar()->insertSeparator();
131
132 QPopupMenu * help = new QPopupMenu( this );
133 menuBar()->insertItem( "&Help", help );
134
135 help->insertItem( "&About", this, SLOT(about()), Key_F1 );
136 help->insertItem( "About &Qt", this, SLOT(aboutQt()) );
137 help->insertSeparator();
138 help->insertItem( "What's &This", this, SLOT(whatsThis()), SHIFT+Key_F1 );
139
140 e = new QTextEdit( this, "editor" );
141 e->setFocus();
142 setCentralWidget( e );
143 statusBar()->message( "Ready", 2000 );
144
145 resize( 450, 600 );
146}
147
148
149ApplicationWindow::~ApplicationWindow()
150{
151#ifndef QT_NO_PRINTER
152 delete printer;
153#endif
154}
155
156
157
158void ApplicationWindow::newDoc()
159{
160 ApplicationWindow *ed = new ApplicationWindow;
161 ed->setCaption("Qt Example - Application");
162 ed->show();
163}
164
165void ApplicationWindow::choose()
166{
167 QString fn = QFileDialog::getOpenFileName( QString::null, QString::null,
168 this);
169 if ( !fn.isEmpty() )
170 load( fn );
171 else
172 statusBar()->message( "Loading aborted", 2000 );
173}
174
175
176void ApplicationWindow::load( const QString &fileName )
177{
178 QFile f( fileName );
179 if ( !f.open( IO_ReadOnly ) )
180 return;
181
182 QTextStream ts( &f );
183 e->setText( ts.read() );
184 e->setModified( FALSE );
185 setCaption( fileName );
186 statusBar()->message( "Loaded document " + fileName, 2000 );
187}
188
189
190void ApplicationWindow::save()
191{
192 if ( filename.isEmpty() ) {
193 saveAs();
194 return;
195 }
196
197 QString text = e->text();
198 QFile f( filename );
199 if ( !f.open( IO_WriteOnly ) ) {
200 statusBar()->message( QString("Could not write to %1").arg(filename),
201 2000 );
202 return;
203 }
204
205 QTextStream t( &f );
206 t << text;
207 f.close();
208
209 e->setModified( FALSE );
210
211 setCaption( filename );
212
213 statusBar()->message( QString( "File %1 saved" ).arg( filename ), 2000 );
214}
215
216
217void ApplicationWindow::saveAs()
218{
219 QString fn = QFileDialog::getSaveFileName( QString::null, QString::null,
220 this );
221 if ( !fn.isEmpty() ) {
222 filename = fn;
223 save();
224 } else {
225 statusBar()->message( "Saving aborted", 2000 );
226 }
227}
228
229
230void ApplicationWindow::print()
231{
232#ifndef QT_NO_PRINTER
233 printer->setFullPage( TRUE );
234 if ( printer->setup(this) ) { // printer dialog
235 statusBar()->message( "Printing..." );
236 QPainter p;
237 if( !p.begin( printer ) ) { // paint on printer
238 statusBar()->message( "Printing aborted", 2000 );
239 return;
240 }
241
242 QPaintDeviceMetrics metrics( p.device() );
243 int dpiy = metrics.logicalDpiY();
244 int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
245 QRect body( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
246 QSimpleRichText richText( QStyleSheet::convertFromPlainText(e->text()),
247 QFont(),
248 e->context(),
249 e->styleSheet(),
250 e->mimeSourceFactory(),
251 body.height() );
252 richText.setWidth( &p, body.width() );
253 QRect view( body );
254 int page = 1;
255 do {
256 richText.draw( &p, body.left(), body.top(), view, colorGroup() );
257 view.moveBy( 0, body.height() );
258 p.translate( 0 , -body.height() );
259 p.drawText( view.right() - p.fontMetrics().width( QString::number( page ) ),
260 view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) );
261 if ( view.top() >= richText.height() )
262 break;
263 printer->newPage();
264 page++;
265 } while (TRUE);
266
267 statusBar()->message( "Printing completed", 2000 );
268 } else {
269 statusBar()->message( "Printing aborted", 2000 );
270 }
271#endif
272}
273
274void ApplicationWindow::closeEvent( QCloseEvent* ce )
275{
276 if ( !e->isModified() ) {
277 ce->accept();
278 return;
279 }
280
281 switch( QMessageBox::information( this, "Qt Application Example",
282 "Do you want to save the changes"
283 " to the document?",
284 "Yes", "No", "Cancel",
285 0, 1 ) ) {
286 case 0:
287 save();
288 ce->accept();
289 break;
290 case 1:
291 ce->accept();
292 break;
293 case 2:
294 default: // just for sanity
295 ce->ignore();
296 break;
297 }
298}
299
300
301void ApplicationWindow::about()
302{
303 QMessageBox::about( this, "Qt Application Example",
304 "This example demonstrates simple use of "
305 "QMainWindow,\nQMenuBar and QToolBar.");
306}
307
308
309void ApplicationWindow::aboutQt()
310{
311 QMessageBox::aboutQt( this, "Qt Application Example" );
312}
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