Add Qt3 development HEAD version

1 files changed, 337 insertions, 0 deletions

diff --git a/examples/demo/textdrawing/helpwindow.cpp b/examples/demo/textdrawing/helpwindow.cpp
new file mode 100644
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+++ b/examples/demo/textdrawing/helpwindow.cpp
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+/****************************************************************************
+**
+** 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 ), 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();
+}