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316 lines
9.1 KiB
316 lines
9.1 KiB
/****************************************************************************
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "helpwindow.h"
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#include <qstatusbar.h>
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#include <qpixmap.h>
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#include <qpopupmenu.h>
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#include <qmenubar.h>
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#include <qtoolbar.h>
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#include <qtoolbutton.h>
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#include <qiconset.h>
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#include <qfile.h>
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#include <qtextstream.h>
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#include <qstylesheet.h>
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#include <qmessagebox.h>
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#include <qfiledialog.h>
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#include <qapplication.h>
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#include <qcombobox.h>
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#include <qevent.h>
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#include <qlineedit.h>
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#include <qobjectlist.h>
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#include <qfileinfo.h>
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#include <qfile.h>
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#include <qdatastream.h>
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#include <qprinter.h>
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#include <qsimplerichtext.h>
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#include <qpainter.h>
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#include <qpaintdevicemetrics.h>
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#include <ctype.h>
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HelpWindow::HelpWindow( const QString& home_, const QString& _path,
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QWidget* parent, const char *name )
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: QMainWindow( parent, name, WDestructiveClose ),
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pathCombo( 0 )
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{
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readHistory();
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readBookmarks();
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browser = new QTextBrowser( this );
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browser->mimeSourceFactory()->setFilePath( _path );
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browser->setFrameStyle( QFrame::Panel | QFrame::Sunken );
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connect( browser, SIGNAL( sourceChanged(const QString& ) ),
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this, SLOT( sourceChanged( const QString&) ) );
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setCentralWidget( browser );
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if ( !home_.isEmpty() )
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browser->setSource( home_ );
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connect( browser, SIGNAL( highlighted( const QString&) ),
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statusBar(), SLOT( message( const QString&)) );
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resize( 640,700 );
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QPopupMenu* file = new QPopupMenu( this );
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file->insertItem( tr("&New Window"), this, SLOT( newWindow() ), CTRL+Key_N );
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file->insertItem( tr("&Open File"), this, SLOT( openFile() ), CTRL+Key_O );
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file->insertItem( tr("&Print"), this, SLOT( print() ), CTRL+Key_P );
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file->insertSeparator();
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file->insertItem( tr("&Close"), this, SLOT( close() ), CTRL+Key_Q );
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file->insertItem( tr("E&xit"), qApp, SLOT( closeAllWindows() ), CTRL+Key_X );
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// The same three icons are used twice each.
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QIconSet icon_back( QPixmap("back.xpm") );
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QIconSet icon_forward( QPixmap("forward.xpm") );
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QIconSet icon_home( QPixmap("home.xpm") );
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QPopupMenu* go = new QPopupMenu( this );
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backwardId = go->insertItem( icon_back,
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tr("&Backward"), browser, SLOT( backward() ),
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CTRL+Key_Left );
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forwardId = go->insertItem( icon_forward,
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tr("&Forward"), browser, SLOT( forward() ),
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CTRL+Key_Right );
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go->insertItem( icon_home, tr("&Home"), browser, SLOT( home() ) );
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QPopupMenu* help = new QPopupMenu( this );
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help->insertItem( tr("&About"), this, SLOT( about() ) );
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help->insertItem( tr("About &Qt"), this, SLOT( aboutQt() ) );
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hist = new QPopupMenu( this );
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QStringList::Iterator it = history.begin();
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for ( ; it != history.end(); ++it )
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mHistory[ hist->insertItem( *it ) ] = *it;
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connect( hist, SIGNAL( activated( int ) ),
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this, SLOT( histChosen( int ) ) );
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bookm = new QPopupMenu( this );
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bookm->insertItem( tr( "Add Bookmark" ), this, SLOT( addBookmark() ) );
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bookm->insertSeparator();
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QStringList::Iterator it2 = bookmarks.begin();
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for ( ; it2 != bookmarks.end(); ++it2 )
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mBookmarks[ bookm->insertItem( *it2 ) ] = *it2;
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connect( bookm, SIGNAL( activated( int ) ),
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this, SLOT( bookmChosen( int ) ) );
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menuBar()->insertItem( tr("&File"), file );
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menuBar()->insertItem( tr("&Go"), go );
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menuBar()->insertItem( tr( "History" ), hist );
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menuBar()->insertItem( tr( "Bookmarks" ), bookm );
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menuBar()->insertSeparator();
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menuBar()->insertItem( tr("&Help"), help );
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menuBar()->setItemEnabled( forwardId, FALSE);
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menuBar()->setItemEnabled( backwardId, FALSE);
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connect( browser, SIGNAL( backwardAvailable( bool ) ),
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this, SLOT( setBackwardAvailable( bool ) ) );
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connect( browser, SIGNAL( forwardAvailable( bool ) ),
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this, SLOT( setForwardAvailable( bool ) ) );
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QToolBar* toolbar = new QToolBar( this );
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addToolBar( toolbar, "Toolbar");
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QToolButton* button;
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button = new QToolButton( icon_back, tr("Backward"), "", browser, SLOT(backward()), toolbar );
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connect( browser, SIGNAL( backwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) );
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button->setEnabled( FALSE );
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button = new QToolButton( icon_forward, tr("Forward"), "", browser, SLOT(forward()), toolbar );
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connect( browser, SIGNAL( forwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) );
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button->setEnabled( FALSE );
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button = new QToolButton( icon_home, tr("Home"), "", browser, SLOT(home()), toolbar );
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toolbar->addSeparator();
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pathCombo = new QComboBox( TRUE, toolbar );
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connect( pathCombo, SIGNAL( activated( const QString & ) ),
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this, SLOT( pathSelected( const QString & ) ) );
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toolbar->setStretchableWidget( pathCombo );
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setRightJustification( TRUE );
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setDockEnabled( DockLeft, FALSE );
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setDockEnabled( DockRight, FALSE );
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pathCombo->insertItem( home_ );
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browser->setFocus();
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}
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void HelpWindow::setBackwardAvailable( bool b)
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{
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menuBar()->setItemEnabled( backwardId, b);
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}
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void HelpWindow::setForwardAvailable( bool b)
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{
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menuBar()->setItemEnabled( forwardId, b);
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}
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void HelpWindow::sourceChanged( const QString& url )
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{
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if ( browser->documentTitle().isNull() )
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setCaption( "Qt Example - Helpviewer - " + url );
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else
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setCaption( "Qt Example - Helpviewer - " + browser->documentTitle() ) ;
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if ( !url.isEmpty() && pathCombo ) {
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bool exists = FALSE;
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int i;
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for ( i = 0; i < pathCombo->count(); ++i ) {
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if ( pathCombo->text( i ) == url ) {
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exists = TRUE;
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break;
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}
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}
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if ( !exists ) {
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pathCombo->insertItem( url, 0 );
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pathCombo->setCurrentItem( 0 );
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mHistory[ hist->insertItem( url ) ] = url;
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} else
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pathCombo->setCurrentItem( i );
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}
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}
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HelpWindow::~HelpWindow()
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{
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history = mHistory.values();
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QFile f( QDir::currentDirPath() + "/.history" );
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f.open( IO_WriteOnly );
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QDataStream s( &f );
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s << history;
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f.close();
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bookmarks = mBookmarks.values();
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QFile f2( QDir::currentDirPath() + "/.bookmarks" );
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f2.open( IO_WriteOnly );
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QDataStream s2( &f2 );
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s2 << bookmarks;
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f2.close();
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}
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void HelpWindow::about()
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{
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QMessageBox::about( this, "HelpViewer Example",
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"<p>This example implements a simple HTML help viewer "
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"using Qt's rich text capabilities</p>"
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"<p>It's just about 400 lines of C++ code, so don't expect too much :-)</p>"
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);
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}
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void HelpWindow::aboutQt()
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{
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QMessageBox::aboutQt( this, "QBrowser" );
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}
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void HelpWindow::openFile()
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{
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#ifndef QT_NO_FILEDIALOG
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QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
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if ( !fn.isEmpty() )
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browser->setSource( fn );
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#endif
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}
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void HelpWindow::newWindow()
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{
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( new HelpWindow(browser->source(), "qbrowser") )->show();
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}
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void HelpWindow::print()
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{
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#ifndef QT_NO_PRINTER
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QPrinter printer( QPrinter::HighResolution );
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printer.setFullPage(TRUE);
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if ( printer.setup( this ) ) {
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QPainter p( &printer );
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if( !p.isActive() ) // starting printing failed
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return;
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QPaintDeviceMetrics metrics(p.device());
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int dpiy = metrics.logicalDpiY();
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int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins
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QRect view( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin );
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QSimpleRichText richText( browser->text(),
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QFont(),
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browser->context(),
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browser->styleSheet(),
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browser->mimeSourceFactory(),
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view.height() );
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richText.setWidth( &p, view.width() );
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int page = 1;
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do {
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richText.draw( &p, margin, margin, view, colorGroup() );
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view.moveBy( 0, view.height() );
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p.translate( 0 , -view.height() );
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p.drawText( view.right() - p.fontMetrics().width( QString::number(page) ),
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view.bottom() + p.fontMetrics().ascent() + 5, QString::number(page) );
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if ( view.top() - margin >= richText.height() )
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break;
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printer.newPage();
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page++;
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} while (TRUE);
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}
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#endif
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}
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void HelpWindow::pathSelected( const QString &_path )
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{
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browser->setSource( _path );
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if ( mHistory.values().contains(_path) )
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mHistory[ hist->insertItem( _path ) ] = _path;
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}
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void HelpWindow::readHistory()
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{
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if ( QFile::exists( QDir::currentDirPath() + "/.history" ) ) {
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QFile f( QDir::currentDirPath() + "/.history" );
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f.open( IO_ReadOnly );
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QDataStream s( &f );
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s >> history;
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f.close();
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while ( history.count() > 20 )
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history.remove( history.begin() );
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}
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}
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void HelpWindow::readBookmarks()
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{
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if ( QFile::exists( QDir::currentDirPath() + "/.bookmarks" ) ) {
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QFile f( QDir::currentDirPath() + "/.bookmarks" );
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f.open( IO_ReadOnly );
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QDataStream s( &f );
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s >> bookmarks;
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f.close();
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}
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}
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void HelpWindow::histChosen( int i )
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{
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if ( mHistory.contains( i ) )
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browser->setSource( mHistory[ i ] );
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}
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void HelpWindow::bookmChosen( int i )
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{
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if ( mBookmarks.contains( i ) )
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browser->setSource( mBookmarks[ i ] );
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}
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void HelpWindow::addBookmark()
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{
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mBookmarks[ bookm->insertItem( caption() ) ] = browser->context();
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}
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