source: trunk/examples/helpviewer/helpwindow.cpp@ 25

Last change on this file since 25 was 2, checked in by dmik, 20 years ago

Imported xplatform parts of the official release 3.3.1 from Trolltech
  • Property svn:keywords set to Id
File size: 9.4 KB
Line 
1/****************************************************************************
2** $Id: helpwindow.cpp 2 2005-11-16 15:49:26Z 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 "helpwindow.h"
12#include <qstatusbar.h>
13#include <qpixmap.h>
14#include <qpopupmenu.h>
15#include <qmenubar.h>
16#include <qtoolbar.h>
17#include <qtoolbutton.h>
18#include <qiconset.h>
19#include <qfile.h>
20#include <qtextstream.h>
21#include <qstylesheet.h>
22#include <qmessagebox.h>
23#include <qfiledialog.h>
24#include <qapplication.h>
25#include <qcombobox.h>
26#include <qevent.h>
27#include <qlineedit.h>
28#include <qobjectlist.h>
29#include <qfileinfo.h>
30#include <qfile.h>
31#include <qdatastream.h>
32#include <qprinter.h>
33#include <qsimplerichtext.h>
34#include <qpainter.h>
35#include <qpaintdevicemetrics.h>
36
37#include <ctype.h>
38
39HelpWindow::HelpWindow( const QString& home_, const QString& _path,
40 QWidget* parent, const char *name )
41 : QMainWindow( parent, name, WDestructiveClose ),
42 pathCombo( 0 )
43{
44 readHistory();
45 readBookmarks();
46
47 browser = new QTextBrowser( this );
48
49 browser->mimeSourceFactory()->setFilePath( _path );
50 browser->setFrameStyle( QFrame::Panel | QFrame::Sunken );
51 connect( browser, SIGNAL( sourceChanged(const QString& ) ),
52 this, SLOT( sourceChanged( const QString&) ) );
53
54 setCentralWidget( browser );
55
56 if ( !home_.isEmpty() )
57 browser->setSource( home_ );
58
59 connect( browser, SIGNAL( highlighted( const QString&) ),
60 statusBar(), SLOT( message( const QString&)) );
61
62 resize( 640,700 );
63
64 QPopupMenu* file = new QPopupMenu( this );
65 file->insertItem( tr("&New Window"), this, SLOT( newWindow() ), CTRL+Key_N );
66 file->insertItem( tr("&Open File"), this, SLOT( openFile() ), CTRL+Key_O );
67 file->insertItem( tr("&Print"), this, SLOT( print() ), CTRL+Key_P );
68 file->insertSeparator();
69 file->insertItem( tr("&Close"), this, SLOT( close() ), CTRL+Key_Q );
70 file->insertItem( tr("E&xit"), qApp, SLOT( closeAllWindows() ), CTRL+Key_X );
71
72 // The same three icons are used twice each.
73 QIconSet icon_back( QPixmap("back.xpm") );
74 QIconSet icon_forward( QPixmap("forward.xpm") );
75 QIconSet icon_home( QPixmap("home.xpm") );
76
77 QPopupMenu* go = new QPopupMenu( this );
78 backwardId = go->insertItem( icon_back,
79 tr("&Backward"), browser, SLOT( backward() ),
80 CTRL+Key_Left );
81 forwardId = go->insertItem( icon_forward,
82 tr("&Forward"), browser, SLOT( forward() ),
83 CTRL+Key_Right );
84 go->insertItem( icon_home, tr("&Home"), browser, SLOT( home() ) );
85
86 QPopupMenu* help = new QPopupMenu( this );
87 help->insertItem( tr("&About"), this, SLOT( about() ) );
88 help->insertItem( tr("About &Qt"), this, SLOT( aboutQt() ) );
89
90 hist = new QPopupMenu( this );
91 QStringList::Iterator it = history.begin();
92 for ( ; it != history.end(); ++it )
93 mHistory[ hist->insertItem( *it ) ] = *it;
94 connect( hist, SIGNAL( activated( int ) ),
95 this, SLOT( histChosen( int ) ) );
96
97 bookm = new QPopupMenu( this );
98 bookm->insertItem( tr( "Add Bookmark" ), this, SLOT( addBookmark() ) );
99 bookm->insertSeparator();
100
101 QStringList::Iterator it2 = bookmarks.begin();
102 for ( ; it2 != bookmarks.end(); ++it2 )
103 mBookmarks[ bookm->insertItem( *it2 ) ] = *it2;
104 connect( bookm, SIGNAL( activated( int ) ),
105 this, SLOT( bookmChosen( int ) ) );
106
107 menuBar()->insertItem( tr("&File"), file );
108 menuBar()->insertItem( tr("&Go"), go );
109 menuBar()->insertItem( tr( "History" ), hist );
110 menuBar()->insertItem( tr( "Bookmarks" ), bookm );
111 menuBar()->insertSeparator();
112 menuBar()->insertItem( tr("&Help"), help );
113
114 menuBar()->setItemEnabled( forwardId, FALSE);
115 menuBar()->setItemEnabled( backwardId, FALSE);
116 connect( browser, SIGNAL( backwardAvailable( bool ) ),
117 this, SLOT( setBackwardAvailable( bool ) ) );
118 connect( browser, SIGNAL( forwardAvailable( bool ) ),
119 this, SLOT( setForwardAvailable( bool ) ) );
120
121
122 QToolBar* toolbar = new QToolBar( this );
123 addToolBar( toolbar, "Toolbar");
124 QToolButton* button;
125
126 button = new QToolButton( icon_back, tr("Backward"), "", browser, SLOT(backward()), toolbar );
127 connect( browser, SIGNAL( backwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) );
128 button->setEnabled( FALSE );
129 button = new QToolButton( icon_forward, tr("Forward"), "", browser, SLOT(forward()), toolbar );
130 connect( browser, SIGNAL( forwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) );
131 button->setEnabled( FALSE );
132 button = new QToolButton( icon_home, tr("Home"), "", browser, SLOT(home()), toolbar );
133
134 toolbar->addSeparator();
135
136 pathCombo = new QComboBox( TRUE, toolbar );
137 connect( pathCombo, SIGNAL( activated( const QString & ) ),
138 this, SLOT( pathSelected( const QString & ) ) );
139 toolbar->setStretchableWidget( pathCombo );
140 setRightJustification( TRUE );
141 setDockEnabled( DockLeft, FALSE );
142 setDockEnabled( DockRight, FALSE );
143
144 pathCombo->insertItem( home_ );
145 browser->setFocus();
146
147}
148
149
150void HelpWindow::setBackwardAvailable( bool b)
151{
152 menuBar()->setItemEnabled( backwardId, b);
153}
154
155void HelpWindow::setForwardAvailable( bool b)
156{
157 menuBar()->setItemEnabled( forwardId, b);
158}
159
160
161void HelpWindow::sourceChanged( const QString& url )
162{
163 if ( browser->documentTitle().isNull() )
164 setCaption( "Qt Example - Helpviewer - " + url );
165 else
166 setCaption( "Qt Example - Helpviewer - " + browser->documentTitle() ) ;
167
168 if ( !url.isEmpty() && pathCombo ) {
169 bool exists = FALSE;
170 int i;
171 for ( i = 0; i < pathCombo->count(); ++i ) {
172 if ( pathCombo->text( i ) == url ) {
173 exists = TRUE;
174 break;
175 }
176 }
177 if ( !exists ) {
178 pathCombo->insertItem( url, 0 );
179 pathCombo->setCurrentItem( 0 );
180 mHistory[ hist->insertItem( url ) ] = url;
181 } else
182 pathCombo->setCurrentItem( i );
183 }
184}
185
186HelpWindow::~HelpWindow()
187{
188 history = mHistory.values();
189
190 QFile f( QDir::currentDirPath() + "/.history" );
191 f.open( IO_WriteOnly );
192 QDataStream s( &f );
193 s << history;
194 f.close();
195
196 bookmarks = mBookmarks.values();
197
198 QFile f2( QDir::currentDirPath() + "/.bookmarks" );
199 f2.open( IO_WriteOnly );
200 QDataStream s2( &f2 );
201 s2 << bookmarks;
202 f2.close();
203}
204
205void HelpWindow::about()
206{
207 QMessageBox::about( this, "HelpViewer Example",
208 "<p>This example implements a simple HTML help viewer "
209 "using Qt's rich text capabilities</p>"
210 "<p>It's just about 400 lines of C++ code, so don't expect too much :-)</p>"
211 );
212}
213
214
215void HelpWindow::aboutQt()
216{
217 QMessageBox::aboutQt( this, "QBrowser" );
218}
219
220void HelpWindow::openFile()
221{
222#ifndef QT_NO_FILEDIALOG
223 QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
224 if ( !fn.isEmpty() )
225 browser->setSource( fn );
226#endif
227}
228
229void HelpWindow::newWindow()
230{
231 ( new HelpWindow(browser->source(), "qbrowser") )->show();
232}
233
234void HelpWindow::print()
235{
236#ifndef QT_NO_PRINTER
237 QPrinter printer( QPrinter::HighResolution );
238 printer.setFullPage(TRUE);
239 if ( printer.setup( this ) ) {
240 QPainter p( &printer );
241 if( !p.isActive() ) // starting printing failed
242 return;
243 QPaintDeviceMetrics metrics(p.device());
244 int dpiy = metrics.logicalDpiY();
245 int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
246 QRect body( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
247 QSimpleRichText richText( browser->text(),
248 QFont(),
249 browser->context(),
250 browser->styleSheet(),
251 browser->mimeSourceFactory(),
252 body.height() );
253 richText.setWidth( &p, body.width() );
254 QRect view( body );
255 int page = 1;
256 do {
257 richText.draw( &p, body.left(), body.top(), view, colorGroup() );
258 view.moveBy( 0, body.height() );
259 p.translate( 0 , -body.height() );
260 p.drawText( view.right() - p.fontMetrics().width( QString::number(page) ),
261 view.bottom() + p.fontMetrics().ascent() + 5, QString::number(page) );
262 if ( view.top() >= richText.height() )
263 break;
264 printer.newPage();
265 page++;
266 } while (TRUE);
267 }
268#endif
269}
270
271void HelpWindow::pathSelected( const QString &_path )
272{
273 browser->setSource( _path );
274 if ( mHistory.values().contains(_path) )
275 mHistory[ hist->insertItem( _path ) ] = _path;
276}
277
278void HelpWindow::readHistory()
279{
280 if ( QFile::exists( QDir::currentDirPath() + "/.history" ) ) {
281 QFile f( QDir::currentDirPath() + "/.history" );
282 f.open( IO_ReadOnly );
283 QDataStream s( &f );
284 s >> history;
285 f.close();
286 while ( history.count() > 20 )
287 history.remove( history.begin() );
288 }
289}
290
291void HelpWindow::readBookmarks()
292{
293 if ( QFile::exists( QDir::currentDirPath() + "/.bookmarks" ) ) {
294 QFile f( QDir::currentDirPath() + "/.bookmarks" );
295 f.open( IO_ReadOnly );
296 QDataStream s( &f );
297 s >> bookmarks;
298 f.close();
299 }
300}
301
302void HelpWindow::histChosen( int i )
303{
304 if ( mHistory.contains( i ) )
305 browser->setSource( mHistory[ i ] );
306}
307
308void HelpWindow::bookmChosen( int i )
309{
310 if ( mBookmarks.contains( i ) )
311 browser->setSource( mBookmarks[ i ] );
312}
313
314void HelpWindow::addBookmark()
315{
316 mBookmarks[ bookm->insertItem( caption() ) ] = browser->context();
317}
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