/****************************************************************************** $Id: qt/helpwindow.cpp   3.3.4   edited May 27 2003 $**** Copyright (C) 1992-2000 Trolltech AS.  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 ), selectedURL(){    readHistory();    readBookmarks();    browser = new QTextBrowser( this );    browser->mimeSourceFactory()->setFilePath( _path );    browser->setFrameStyle( QFrame::Panel | QFrame::Sunken );    connect( browser, SIGNAL( textChanged() ),	     this, SLOT( textChanged() ) );    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() ), ALT | Key_N );    file->insertItem( tr("&Open File"), this, SLOT( openFile() ), ALT | Key_O );    file->insertItem( tr("&Print"), this, SLOT( print() ), ALT | Key_P );    // The same three icons are used twice each.    QIconSet icon_back( QPixmap("textdrawing/previous.png") );    QIconSet icon_forward( QPixmap("textdrawing/next.png") );    QIconSet icon_home( QPixmap("textdrawing/home.png") );    QPopupMenu* go = new QPopupMenu( this );    backwardId = go->insertItem( icon_back,				 tr("&Backward"), browser, SLOT( backward() ),				 ALT | Key_Left );    forwardId = go->insertItem( icon_forward,				tr("&Forward"), browser, SLOT( forward() ),				ALT | Key_Right );    go->insertItem( icon_home, tr("&Home"), browser, SLOT( home() ) );    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()->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::textChanged(){    if ( browser->documentTitle().isNull() )	setCaption( browser->context() );    else	setCaption( browser->documentTitle() ) ;    selectedURL = caption();    if ( !selectedURL.isEmpty() && pathCombo ) {	bool exists = FALSE;	int i;	for ( i = 0; i < pathCombo->count(); ++i ) {	    if ( pathCombo->text( i ) == selectedURL ) {		exists = TRUE;		break;	    }	}	if ( !exists ) {	    pathCombo->insertItem( selectedURL, 0 );	    pathCombo->setCurrentItem( 0 );	    mHistory[ hist->insertItem( selectedURL ) ] = selectedURL;	} else	    pathCombo->setCurrentItem( i );	selectedURL = QString::null;    }}HelpWindow::~HelpWindow(){    history.clear();    QMap<int, QString>::Iterator it = mHistory.begin();    for ( ; it != mHistory.end(); ++it )	history.append( *it );    QFile f( QDir::currentDirPath() + "/.history" );    f.open( IO_WriteOnly );    QDataStream s( &f );    s << history;    f.close();    bookmarks.clear();    QMap<int, QString>::Iterator it2 = mBookmarks.begin();    for ( ; it2 != mBookmarks.end(); ++it2 )	bookmarks.append( *it2 );    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 100 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;    printer.setFullPage(TRUE);    if ( printer.setup() ) {	QPainter p( &printer );	QPaintDeviceMetrics metrics(p.device());	int dpix = metrics.logicalDpiX();	int dpiy = metrics.logicalDpiY();	const int margin = 72; // pt	QRect body(margin*dpix/72, margin*dpiy/72,		   metrics.width()-margin*dpix/72*2,		   metrics.height()-margin*dpiy/72*2 );	QFont font("times", 10);	QStringList filePaths = browser->mimeSourceFactory()->filePath();	QString file;	QStringList::Iterator it = filePaths.begin();	for ( ; it != filePaths.end(); ++it ) {	    file = QUrl( *it, QUrl( browser->source() ).path() ).path();	    if ( QFile::exists( file ) )		break;	    else		file = QString::null;	}	if ( file.isEmpty() )	    return;	QFile f( file );	if ( !f.open( IO_ReadOnly ) )	    return;	QTextStream ts( &f );	QSimpleRichText richText( ts.read(), font, browser->context(), browser->styleSheet(),				  browser->mimeSourceFactory(), body.height() );	richText.setWidth( &p, body.width() );	QRect view( body );	int page = 1;	do {	    richText.draw( &p, body.left(), body.top(), view, colorGroup() );	    view.moveBy( 0, body.height() );	    p.translate( 0 , -body.height() );	    p.setFont( font );	    p.drawText( view.right() - p.fontMetrics().width( QString::number(page) ),			view.bottom() + p.fontMetrics().ascent() + 5, QString::number(page) );	    if ( view.top()  >= richText.height() )		break;	    printer.newPage();	    page++;	} while (TRUE);    }#endif}void HelpWindow::pathSelected( const QString &_path ){    browser->setSource( _path );    QMap<int, QString>::Iterator it = mHistory.begin();    bool exists = FALSE;    for ( ; it != mHistory.end(); ++it ) {	if ( *it == _path ) {	    exists = TRUE;	    break;	}    }    if ( !exists )	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() ) ] = caption();}