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Diffstat (limited to 'examples/helpviewer/helpwindow.cpp')
| -rw-r--r-- | examples/helpviewer/helpwindow.cpp | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/examples/helpviewer/helpwindow.cpp b/examples/helpviewer/helpwindow.cpp new file mode 100644 index 0000000..2e0a9ea --- /dev/null +++ b/examples/helpviewer/helpwindow.cpp @@ -0,0 +1,315 @@ +/**************************************************************************** +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of an example program for Qt. This example +** program may be used, distributed and modified without limitation. +** +*****************************************************************************/ + +#include "helpwindow.h" +#include <qstatusbar.h> +#include <qpixmap.h> +#include <qpopupmenu.h> +#include <qmenubar.h> +#include <qtoolbar.h> +#include <qtoolbutton.h> +#include <qiconset.h> +#include <qfile.h> +#include <qtextstream.h> +#include <qstylesheet.h> +#include <qmessagebox.h> +#include <qfiledialog.h> +#include <qapplication.h> +#include <qcombobox.h> +#include <qevent.h> +#include <qlineedit.h> +#include <qobjectlist.h> +#include <qfileinfo.h> +#include <qfile.h> +#include <qdatastream.h> +#include <qprinter.h> +#include <qsimplerichtext.h> +#include <qpainter.h> +#include <qpaintdevicemetrics.h> + +#include <ctype.h> + +HelpWindow::HelpWindow( const QString& home_, const QString& _path, + QWidget* parent, const char *name ) + : QMainWindow( parent, name, WDestructiveClose ), + pathCombo( 0 ) +{ + readHistory(); + readBookmarks(); + + browser = new QTextBrowser( this ); + + browser->mimeSourceFactory()->setFilePath( _path ); + browser->setFrameStyle( QFrame::Panel | QFrame::Sunken ); + connect( browser, SIGNAL( sourceChanged(const QString& ) ), + this, SLOT( sourceChanged( const QString&) ) ); + + setCentralWidget( browser ); + + if ( !home_.isEmpty() ) + browser->setSource( home_ ); + + connect( browser, SIGNAL( highlighted( const QString&) ), + statusBar(), SLOT( message( const QString&)) ); + + resize( 640,700 ); + + QPopupMenu* file = new QPopupMenu( this ); + file->insertItem( tr("&New Window"), this, SLOT( newWindow() ), CTRL+Key_N ); + file->insertItem( tr("&Open File"), this, SLOT( openFile() ), CTRL+Key_O ); + file->insertItem( tr("&Print"), this, SLOT( print() ), CTRL+Key_P ); + file->insertSeparator(); + file->insertItem( tr("&Close"), this, SLOT( close() ), CTRL+Key_Q ); + file->insertItem( tr("E&xit"), qApp, SLOT( closeAllWindows() ), CTRL+Key_X ); + + // The same three icons are used twice each. + QIconSet icon_back( QPixmap("back.xpm") ); + QIconSet icon_forward( QPixmap("forward.xpm") ); + QIconSet icon_home( QPixmap("home.xpm") ); + + QPopupMenu* go = new QPopupMenu( this ); + backwardId = go->insertItem( icon_back, + tr("&Backward"), browser, SLOT( backward() ), + CTRL+Key_Left ); + forwardId = go->insertItem( icon_forward, + tr("&Forward"), browser, SLOT( forward() ), + CTRL+Key_Right ); + go->insertItem( icon_home, tr("&Home"), browser, SLOT( home() ) ); + + QPopupMenu* help = new QPopupMenu( this ); + help->insertItem( tr("&About"), this, SLOT( about() ) ); + help->insertItem( tr("About &Qt"), this, SLOT( aboutQt() ) ); + + hist = new QPopupMenu( this ); + QStringList::Iterator it = history.begin(); + for ( ; it != history.end(); ++it ) + mHistory[ hist->insertItem( *it ) ] = *it; + connect( hist, SIGNAL( activated( int ) ), + this, SLOT( histChosen( int ) ) ); + + bookm = new QPopupMenu( this ); + bookm->insertItem( tr( "Add Bookmark" ), this, SLOT( addBookmark() ) ); + bookm->insertSeparator(); + + QStringList::Iterator it2 = bookmarks.begin(); + for ( ; it2 != bookmarks.end(); ++it2 ) + mBookmarks[ bookm->insertItem( *it2 ) ] = *it2; + connect( bookm, SIGNAL( activated( int ) ), + this, SLOT( bookmChosen( int ) ) ); + + menuBar()->insertItem( tr("&File"), file ); + menuBar()->insertItem( tr("&Go"), go ); + menuBar()->insertItem( tr( "History" ), hist ); + menuBar()->insertItem( tr( "Bookmarks" ), bookm ); + menuBar()->insertSeparator(); + menuBar()->insertItem( tr("&Help"), help ); + + menuBar()->setItemEnabled( forwardId, FALSE); + menuBar()->setItemEnabled( backwardId, FALSE); + connect( browser, SIGNAL( backwardAvailable( bool ) ), + this, SLOT( setBackwardAvailable( bool ) ) ); + connect( browser, SIGNAL( forwardAvailable( bool ) ), + this, SLOT( setForwardAvailable( bool ) ) ); + + + QToolBar* toolbar = new QToolBar( this ); + addToolBar( toolbar, "Toolbar"); + QToolButton* button; + + button = new QToolButton( icon_back, tr("Backward"), "", browser, SLOT(backward()), toolbar ); + connect( browser, SIGNAL( backwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) ); + button->setEnabled( FALSE ); + button = new QToolButton( icon_forward, tr("Forward"), "", browser, SLOT(forward()), toolbar ); + connect( browser, SIGNAL( forwardAvailable(bool) ), button, SLOT( setEnabled(bool) ) ); + button->setEnabled( FALSE ); + button = new QToolButton( icon_home, tr("Home"), "", browser, SLOT(home()), toolbar ); + + toolbar->addSeparator(); + + pathCombo = new QComboBox( TRUE, toolbar ); + connect( pathCombo, SIGNAL( activated( const QString & ) ), + this, SLOT( pathSelected( const QString & ) ) ); + toolbar->setStretchableWidget( pathCombo ); + setRightJustification( TRUE ); + setDockEnabled( DockLeft, FALSE ); + setDockEnabled( DockRight, FALSE ); + + pathCombo->insertItem( home_ ); + browser->setFocus(); + +} + + +void HelpWindow::setBackwardAvailable( bool b) +{ + menuBar()->setItemEnabled( backwardId, b); +} + +void HelpWindow::setForwardAvailable( bool b) +{ + menuBar()->setItemEnabled( forwardId, b); +} + + +void HelpWindow::sourceChanged( const QString& url ) +{ + if ( browser->documentTitle().isNull() ) + setCaption( "Qt Example - Helpviewer - " + url ); + else + setCaption( "Qt Example - Helpviewer - " + browser->documentTitle() ) ; + + if ( !url.isEmpty() && pathCombo ) { + bool exists = FALSE; + int i; + for ( i = 0; i < pathCombo->count(); ++i ) { + if ( pathCombo->text( i ) == url ) { + exists = TRUE; + break; + } + } + if ( !exists ) { + pathCombo->insertItem( url, 0 ); + pathCombo->setCurrentItem( 0 ); + mHistory[ hist->insertItem( url ) ] = url; + } else + pathCombo->setCurrentItem( i ); + } +} + +HelpWindow::~HelpWindow() +{ + history = mHistory.values(); + + QFile f( QDir::currentDirPath() + "/.history" ); + f.open( IO_WriteOnly ); + QDataStream s( &f ); + s << history; + f.close(); + + bookmarks = mBookmarks.values(); + + QFile f2( QDir::currentDirPath() + "/.bookmarks" ); + f2.open( IO_WriteOnly ); + QDataStream s2( &f2 ); + s2 << bookmarks; + f2.close(); +} + +void HelpWindow::about() +{ + QMessageBox::about( this, "HelpViewer Example", + "<p>This example implements a simple HTML help viewer " + "using Qt's rich text capabilities</p>" + "<p>It's just about 400 lines of C++ code, so don't expect too much :-)</p>" + ); +} + + +void HelpWindow::aboutQt() +{ + QMessageBox::aboutQt( this, "QBrowser" ); +} + +void HelpWindow::openFile() +{ +#ifndef QT_NO_FILEDIALOG + QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this ); + if ( !fn.isEmpty() ) + browser->setSource( fn ); +#endif +} + +void HelpWindow::newWindow() +{ + ( new HelpWindow(browser->source(), "qbrowser") )->show(); +} + +void HelpWindow::print() +{ +#ifndef QT_NO_PRINTER + QPrinter printer( QPrinter::HighResolution ); + printer.setFullPage(TRUE); + if ( printer.setup( this ) ) { + QPainter p( &printer ); + if( !p.isActive() ) // starting printing failed + return; + QPaintDeviceMetrics metrics(p.device()); + int dpiy = metrics.logicalDpiY(); + int margin = (int) ( (2/2.54)*dpiy ); // 2 cm margins + QRect view( margin, margin, metrics.width() - 2*margin, metrics.height() - 2*margin ); + QSimpleRichText richText( browser->text(), + QFont(), + browser->context(), + browser->styleSheet(), + browser->mimeSourceFactory(), + view.height() ); + richText.setWidth( &p, view.width() ); + int page = 1; + do { + richText.draw( &p, margin, margin, view, colorGroup() ); + view.moveBy( 0, view.height() ); + p.translate( 0 , -view.height() ); + p.drawText( view.right() - p.fontMetrics().width( QString::number(page) ), + view.bottom() + p.fontMetrics().ascent() + 5, QString::number(page) ); + if ( view.top() - margin >= richText.height() ) + break; + printer.newPage(); + page++; + } while (TRUE); + } +#endif +} + +void HelpWindow::pathSelected( const QString &_path ) +{ + browser->setSource( _path ); + if ( mHistory.values().contains(_path) ) + mHistory[ hist->insertItem( _path ) ] = _path; +} + +void HelpWindow::readHistory() +{ + if ( QFile::exists( QDir::currentDirPath() + "/.history" ) ) { + QFile f( QDir::currentDirPath() + "/.history" ); + f.open( IO_ReadOnly ); + QDataStream s( &f ); + s >> history; + f.close(); + while ( history.count() > 20 ) + history.remove( history.begin() ); + } +} + +void HelpWindow::readBookmarks() +{ + if ( QFile::exists( QDir::currentDirPath() + "/.bookmarks" ) ) { + QFile f( QDir::currentDirPath() + "/.bookmarks" ); + f.open( IO_ReadOnly ); + QDataStream s( &f ); + s >> bookmarks; + f.close(); + } +} + +void HelpWindow::histChosen( int i ) +{ + if ( mHistory.contains( i ) ) + browser->setSource( mHistory[ i ] ); +} + +void HelpWindow::bookmChosen( int i ) +{ + if ( mBookmarks.contains( i ) ) + browser->setSource( mBookmarks[ i ] ); +} + +void HelpWindow::addBookmark() +{ + mBookmarks[ bookm->insertItem( caption() ) ] = browser->context(); +} |