source: trunk/examples/demo/textdrawing/helpwindow.cpp@ 203

Last change on this file since 203 was 160, checked in by dmik, 19 years ago

Imported table and iconview modules and a bunch of dependent examples from the official release 3.3.1 from Trolltech.
  • Property svn:keywords set to Id
File size: 9.8 KB
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1/****************************************************************************
2** $Id: helpwindow.cpp 160 2006-12-11 20:15:57Z 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 "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 ), selectedURL()
43{
44 readHistory();
45 readBookmarks();
46
47 browser = new QTextBrowser( this );
48 browser->mimeSourceFactory()->setFilePath( _path );
49 browser->setFrameStyle( QFrame::Panel | QFrame::Sunken );
50 connect( browser, SIGNAL( textChanged() ),
51 this, SLOT( textChanged() ) );
52
53 setCentralWidget( browser );
54
55 if ( !home_.isEmpty() )
56 browser->setSource( home_ );
57
58 connect( browser, SIGNAL( highlighted( const QString&) ),
59 statusBar(), SLOT( message( const QString&)) );
60
61 resize( 640,700 );
62
63 QPopupMenu* file = new QPopupMenu( this );
64 file->insertItem( tr("&New Window"), this, SLOT( newWindow() ), ALT | Key_N );
65 file->insertItem( tr("&Open File"), this, SLOT( openFile() ), ALT | Key_O );
66 file->insertItem( tr("&Print"), this, SLOT( print() ), ALT | Key_P );
67
68 // The same three icons are used twice each.
69 QIconSet icon_back( QPixmap("textdrawing/previous.png") );
70 QIconSet icon_forward( QPixmap("textdrawing/next.png") );
71 QIconSet icon_home( QPixmap("textdrawing/home.png") );
72
73 QPopupMenu* go = new QPopupMenu( this );
74 backwardId = go->insertItem( icon_back,
75 tr("&Backward"), browser, SLOT( backward() ),
76 ALT | Key_Left );
77 forwardId = go->insertItem( icon_forward,
78 tr("&Forward"), browser, SLOT( forward() ),
79 ALT | Key_Right );
80 go->insertItem( icon_home, tr("&Home"), browser, SLOT( home() ) );
81
82 hist = new QPopupMenu( this );
83 QStringList::Iterator it = history.begin();
84 for ( ; it != history.end(); ++it )
85 mHistory[ hist->insertItem( *it ) ] = *it;
86 connect( hist, SIGNAL( activated( int ) ),
87 this, SLOT( histChosen( int ) ) );
88
89 bookm = new QPopupMenu( this );
90 bookm->insertItem( tr( "Add Bookmark" ), this, SLOT( addBookmark() ) );
91 bookm->insertSeparator();
92
93 QStringList::Iterator it2 = bookmarks.begin();
94 for ( ; it2 != bookmarks.end(); ++it2 )
95 mBookmarks[ bookm->insertItem( *it2 ) ] = *it2;
96 connect( bookm, SIGNAL( activated( int ) ),
97 this, SLOT( bookmChosen( int ) ) );
98
99 menuBar()->insertItem( tr("&File"), file );
100 menuBar()->insertItem( tr("&Go"), go );
101 menuBar()->insertItem( tr( "History" ), hist );
102 menuBar()->insertItem( tr( "Bookmarks" ), bookm );
103
104 menuBar()->setItemEnabled( forwardId, FALSE);
105 menuBar()->setItemEnabled( backwardId, FALSE);
106 connect( browser, SIGNAL( backwardAvailable( bool ) ),
107 this, SLOT( setBackwardAvailable( bool ) ) );
108 connect( browser, SIGNAL( forwardAvailable( bool ) ),
109 this, SLOT( setForwardAvailable( bool ) ) );
110
111
112 QToolBar* toolbar = new QToolBar( this );
113 addToolBar( toolbar, "Toolbar");
114 QToolButton* button;
115
116 button = new QToolButton( icon_back, tr("Backward"), "", browser, SLOT(backward()), toolbar );
117 connect( browser, SIGNAL( backwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) );
118 button->setEnabled( FALSE );
119 button = new QToolButton( icon_forward, tr("Forward"), "", browser, SLOT(forward()), toolbar );
120 connect( browser, SIGNAL( forwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) );
121 button->setEnabled( FALSE );
122 button = new QToolButton( icon_home, tr("Home"), "", browser, SLOT(home()), toolbar );
123
124 toolbar->addSeparator();
125
126 pathCombo = new QComboBox( TRUE, toolbar );
127 connect( pathCombo, SIGNAL( activated( const QString & ) ),
128 this, SLOT( pathSelected( const QString & ) ) );
129 toolbar->setStretchableWidget( pathCombo );
130 setRightJustification( TRUE );
131 setDockEnabled( DockLeft, FALSE );
132 setDockEnabled( DockRight, FALSE );
133
134 pathCombo->insertItem( home_ );
135
136 browser->setFocus();
137}
138
139
140void HelpWindow::setBackwardAvailable( bool b)
141{
142 menuBar()->setItemEnabled( backwardId, b);
143}
144
145void HelpWindow::setForwardAvailable( bool b)
146{
147 menuBar()->setItemEnabled( forwardId, b);
148}
149
150
151void HelpWindow::textChanged()
152{
153 if ( browser->documentTitle().isNull() )
154 setCaption( browser->context() );
155 else
156 setCaption( browser->documentTitle() ) ;
157
158 selectedURL = caption();
159 if ( !selectedURL.isEmpty() && pathCombo ) {
160 bool exists = FALSE;
161 int i;
162 for ( i = 0; i < pathCombo->count(); ++i ) {
163 if ( pathCombo->text( i ) == selectedURL ) {
164 exists = TRUE;
165 break;
166 }
167 }
168 if ( !exists ) {
169 pathCombo->insertItem( selectedURL, 0 );
170 pathCombo->setCurrentItem( 0 );
171 mHistory[ hist->insertItem( selectedURL ) ] = selectedURL;
172 } else
173 pathCombo->setCurrentItem( i );
174 selectedURL = QString::null;
175 }
176}
177
178HelpWindow::~HelpWindow()
179{
180 history.clear();
181 QMap<int, QString>::Iterator it = mHistory.begin();
182 for ( ; it != mHistory.end(); ++it )
183 history.append( *it );
184
185 QFile f( QDir::currentDirPath() + "/.history" );
186 f.open( IO_WriteOnly );
187 QDataStream s( &f );
188 s << history;
189 f.close();
190
191 bookmarks.clear();
192 QMap<int, QString>::Iterator it2 = mBookmarks.begin();
193 for ( ; it2 != mBookmarks.end(); ++it2 )
194 bookmarks.append( *it2 );
195
196 QFile f2( QDir::currentDirPath() + "/.bookmarks" );
197 f2.open( IO_WriteOnly );
198 QDataStream s2( &f2 );
199 s2 << bookmarks;
200 f2.close();
201}
202
203void HelpWindow::about()
204{
205 QMessageBox::about( this, "HelpViewer Example",
206 "<p>This example implements a simple HTML help viewer "
207 "using Qt's rich text capabilities</p>"
208 "<p>It's just about 100 lines of C++ code, so don't expect too much :-)</p>"
209 );
210}
211
212
213void HelpWindow::aboutQt()
214{
215 QMessageBox::aboutQt( this, "QBrowser" );
216}
217
218void HelpWindow::openFile()
219{
220#ifndef QT_NO_FILEDIALOG
221 QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
222 if ( !fn.isEmpty() )
223 browser->setSource( fn );
224#endif
225}
226
227void HelpWindow::newWindow()
228{
229 ( new HelpWindow(browser->source(), "qbrowser") )->show();
230}
231
232void HelpWindow::print()
233{
234#ifndef QT_NO_PRINTER
235 QPrinter printer;
236 printer.setFullPage(TRUE);
237 if ( printer.setup() ) {
238 QPainter p( &printer );
239 QPaintDeviceMetrics metrics(p.device());
240 int dpix = metrics.logicalDpiX();
241 int dpiy = metrics.logicalDpiY();
242 const int margin = 72; // pt
243 QRect body(margin*dpix/72, margin*dpiy/72,
244 metrics.width()-margin*dpix/72*2,
245 metrics.height()-margin*dpiy/72*2 );
246 QFont font("times", 10);
247 QStringList filePaths = browser->mimeSourceFactory()->filePath();
248 QString file;
249 QStringList::Iterator it = filePaths.begin();
250 for ( ; it != filePaths.end(); ++it ) {
251 file = QUrl( *it, QUrl( browser->source() ).path() ).path();
252 if ( QFile::exists( file ) )
253 break;
254 else
255 file = QString::null;
256 }
257 if ( file.isEmpty() )
258 return;
259 QFile f( file );
260 if ( !f.open( IO_ReadOnly ) )
261 return;
262 QTextStream ts( &f );
263 QSimpleRichText richText( ts.read(), font, browser->context(), browser->styleSheet(),
264 browser->mimeSourceFactory(), body.height() );
265 richText.setWidth( &p, body.width() );
266 QRect view( body );
267 int page = 1;
268 do {
269 richText.draw( &p, body.left(), body.top(), view, colorGroup() );
270 view.moveBy( 0, body.height() );
271 p.translate( 0 , -body.height() );
272 p.setFont( font );
273 p.drawText( view.right() - p.fontMetrics().width( QString::number(page) ),
274 view.bottom() + p.fontMetrics().ascent() + 5, QString::number(page) );
275 if ( view.top() >= richText.height() )
276 break;
277 printer.newPage();
278 page++;
279 } while (TRUE);
280 }
281#endif
282}
283
284void HelpWindow::pathSelected( const QString &_path )
285{
286 browser->setSource( _path );
287 QMap<int, QString>::Iterator it = mHistory.begin();
288 bool exists = FALSE;
289 for ( ; it != mHistory.end(); ++it ) {
290 if ( *it == _path ) {
291 exists = TRUE;
292 break;
293 }
294 }
295 if ( !exists )
296 mHistory[ hist->insertItem( _path ) ] = _path;
297}
298
299void HelpWindow::readHistory()
300{
301 if ( QFile::exists( QDir::currentDirPath() + "/.history" ) ) {
302 QFile f( QDir::currentDirPath() + "/.history" );
303 f.open( IO_ReadOnly );
304 QDataStream s( &f );
305 s >> history;
306 f.close();
307 while ( history.count() > 20 )
308 history.remove( history.begin() );
309 }
310}
311
312void HelpWindow::readBookmarks()
313{
314 if ( QFile::exists( QDir::currentDirPath() + "/.bookmarks" ) ) {
315 QFile f( QDir::currentDirPath() + "/.bookmarks" );
316 f.open( IO_ReadOnly );
317 QDataStream s( &f );
318 s >> bookmarks;
319 f.close();
320 }
321}
322
323void HelpWindow::histChosen( int i )
324{
325 if ( mHistory.contains( i ) )
326 browser->setSource( mHistory[ i ] );
327}
328
329void HelpWindow::bookmChosen( int i )
330{
331 if ( mBookmarks.contains( i ) )
332 browser->setSource( mBookmarks[ i ] );
333}
334
335void HelpWindow::addBookmark()
336{
337 mBookmarks[ bookm->insertItem( caption() ) ] = caption();
338}
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