source: trunk/examples/action/application.cpp@ 7

Last change on this file since 7 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: 8.9 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
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#include "fileprint.xpm"
37
38
39ApplicationWindow::ApplicationWindow()
40 : QMainWindow( 0, "example application main window", WDestructiveClose )
41{
42 printer = new QPrinter( QPrinter::HighResolution );
43
44 QAction * fileNewAction;
45 QAction * fileOpenAction;
46 QAction * fileSaveAction, * fileSaveAsAction, * filePrintAction;
47 QAction * fileCloseAction, * fileQuitAction;
48
49 fileNewAction = new QAction( "&New", CTRL+Key_N, this, "new" );
50 connect( fileNewAction, SIGNAL( activated() ) , this,
51 SLOT( newDoc() ) );
52
53 fileOpenAction = new QAction( QPixmap( fileopen ), "&Open...",
54 CTRL+Key_O, this, "open" );
55 connect( fileOpenAction, SIGNAL( activated() ) , this, SLOT( choose() ) );
56
57 const char * fileOpenText = "<p><img source=\"fileopen\"> "
58 "Click this button to open a <em>new file</em>. <br>"
59 "You can also select the <b>Open</b> command "
60 "from the <b>File</b> menu.</p>";
61 QMimeSourceFactory::defaultFactory()->setPixmap( "fileopen",
62 fileOpenAction->iconSet().pixmap() );
63 fileOpenAction->setWhatsThis( fileOpenText );
64
65 fileSaveAction = new QAction( QPixmap( filesave ),
66 "&Save", CTRL+Key_S, this, "save" );
67 connect( fileSaveAction, SIGNAL( activated() ) , this, SLOT( save() ) );
68
69 const char * fileSaveText = "<p>Click this button to save the file you "
70 "are editing. You will be prompted for a file name.\n"
71 "You can also select the <b>Save</b> command "
72 "from the <b>File</b> menu.</p>";
73 fileSaveAction->setWhatsThis( fileSaveText );
74
75 fileSaveAsAction = new QAction( "Save File As", "Save &As...", 0, this,
76 "save as" );
77 connect( fileSaveAsAction, SIGNAL( activated() ) , this,
78 SLOT( saveAs() ) );
79 fileSaveAsAction->setWhatsThis( fileSaveText );
80
81 filePrintAction = new QAction( "Print File", QPixmap( fileprint ),
82 "&Print...", CTRL+Key_P, this, "print" );
83 connect( filePrintAction, SIGNAL( activated() ) , this,
84 SLOT( print() ) );
85
86 const char * filePrintText = "Click this button to print the file you "
87 "are editing.\n You can also select the Print "
88 "command from the File menu.";
89 filePrintAction->setWhatsThis( filePrintText );
90
91 fileCloseAction = new QAction( "Close", "&Close", CTRL+Key_W, this,
92 "close" );
93 connect( fileCloseAction, SIGNAL( activated() ) , this,
94 SLOT( close() ) );
95
96 fileQuitAction = new QAction( "Quit", "&Quit", CTRL+Key_Q, this,
97 "quit" );
98 connect( fileQuitAction, SIGNAL( activated() ) , qApp,
99 SLOT( closeAllWindows() ) );
100
101 // populate a tool bar with some actions
102
103 QToolBar * fileTools = new QToolBar( this, "file operations" );
104 fileTools->setLabel( "File Operations" );
105 fileOpenAction->addTo( fileTools );
106 fileSaveAction->addTo( fileTools );
107 filePrintAction->addTo( fileTools );
108 (void)QWhatsThis::whatsThisButton( fileTools );
109
110
111 // populate a menu with all actions
112
113 QPopupMenu * file = new QPopupMenu( this );
114 menuBar()->insertItem( "&File", file );
115 fileNewAction->addTo( file );
116 fileOpenAction->addTo( file );
117 fileSaveAction->addTo( file );
118 fileSaveAsAction->addTo( file );
119 file->insertSeparator();
120 filePrintAction->addTo( file );
121 file->insertSeparator();
122 fileCloseAction->addTo( file );
123 fileQuitAction->addTo( file );
124
125
126 menuBar()->insertSeparator();
127
128 // add a help menu
129
130 QPopupMenu * help = new QPopupMenu( this );
131 menuBar()->insertItem( "&Help", help );
132 help->insertItem( "&About", this, SLOT(about()), Key_F1 );
133 help->insertItem( "About &Qt", this, SLOT(aboutQt()) );
134 help->insertSeparator();
135 help->insertItem( "What's &This", this, SLOT(whatsThis()),
136 SHIFT+Key_F1 );
137
138
139 // create and define the central widget
140
141 e = new QTextEdit( this, "editor" );
142 e->setFocus();
143 setCentralWidget( e );
144 statusBar()->message( "Ready", 2000 );
145
146 resize( 450, 600 );
147}
148
149
150ApplicationWindow::~ApplicationWindow()
151{
152 delete printer;
153}
154
155
156
157void ApplicationWindow::newDoc()
158{
159 ApplicationWindow *ed = new ApplicationWindow;
160 ed->show();
161}
162
163void ApplicationWindow::choose()
164{
165 QString fn = QFileDialog::getOpenFileName( QString::null, QString::null,
166 this);
167 if ( !fn.isEmpty() )
168 load( fn );
169 else
170 statusBar()->message( "Loading aborted", 2000 );
171}
172
173
174void ApplicationWindow::load( const QString &fileName )
175{
176 QFile f( fileName );
177 if ( !f.open( IO_ReadOnly ) )
178 return;
179
180 QTextStream ts( &f );
181 e->setText( ts.read() );
182 e->setModified( FALSE );
183 setCaption( fileName );
184 statusBar()->message( "Loaded document " + fileName, 2000 );
185}
186
187
188void ApplicationWindow::save()
189{
190 if ( filename.isEmpty() ) {
191 saveAs();
192 return;
193 }
194
195 QString text = e->text();
196 QFile f( filename );
197 if ( !f.open( IO_WriteOnly ) ) {
198 statusBar()->message( QString("Could not write to %1").arg(filename),
199 2000 );
200 return;
201 }
202
203 QTextStream t( &f );
204 t << text;
205 f.close();
206
207 e->setModified( FALSE );
208
209 setCaption( filename );
210
211 statusBar()->message( QString( "File %1 saved" ).arg( filename ), 2000 );
212}
213
214
215void ApplicationWindow::saveAs()
216{
217 QString fn = QFileDialog::getSaveFileName( QString::null, QString::null,
218 this );
219 if ( !fn.isEmpty() ) {
220 filename = fn;
221 save();
222 } else {
223 statusBar()->message( "Saving aborted", 2000 );
224 }
225}
226
227
228void ApplicationWindow::print()
229{
230 printer->setFullPage( TRUE );
231 if ( printer->setup(this) ) { // printer dialog
232 statusBar()->message( "Printing..." );
233 QPainter p;
234 if( !p.begin( printer ) ) { // paint on printer
235 statusBar()->message( "Printing aborted", 2000 );
236 return;
237 }
238
239 QPaintDeviceMetrics metrics( p.device() );
240 int dpiy = metrics.logicalDpiY();
241 int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
242 QRect body( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
243 QSimpleRichText richText( QStyleSheet::convertFromPlainText(e->text()),
244 QFont(),
245 e->context(),
246 e->styleSheet(),
247 e->mimeSourceFactory(),
248 body.height() );
249 richText.setWidth( &p, body.width() );
250 QRect view( body );
251 int page = 1;
252 do {
253 richText.draw( &p, body.left(), body.top(), view, colorGroup() );
254 view.moveBy( 0, body.height() );
255 p.translate( 0 , -body.height() );
256 p.drawText( view.right() - p.fontMetrics().width( QString::number( page ) ),
257 view.bottom() + p.fontMetrics().ascent() + 5, QString::number( page ) );
258 if ( view.top() >= richText.height() )
259 break;
260 printer->newPage();
261 page++;
262 } while (TRUE);
263
264 statusBar()->message( "Printing completed", 2000 );
265 } else {
266 statusBar()->message( "Printing aborted", 2000 );
267 }
268}
269
270void ApplicationWindow::closeEvent( QCloseEvent* ce )
271{
272 if ( !e->isModified() ) {
273 ce->accept();
274 return;
275 }
276
277 switch( QMessageBox::information( this, "Qt Application Example",
278 "The document has been changed since "
279 "the last save.",
280 "Save Now", "Cancel", "Leave Anyway",
281 0, 1 ) ) {
282 case 0:
283 save();
284 ce->accept();
285 break;
286 case 1:
287 default: // just for sanity
288 ce->ignore();
289 break;
290 case 2:
291 ce->accept();
292 break;
293 }
294}
295
296
297void ApplicationWindow::about()
298{
299 QMessageBox::about( this, "Qt Application Example",
300 "This example demonstrates simple use of "
301 "QMainWindow,\nQMenuBar and QToolBar.");
302}
303
304
305void ApplicationWindow::aboutQt()
306{
307 QMessageBox::aboutQt( this, "Qt Application Example" );
308}
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