Add Qt3 development HEAD version

1 files changed, 354 insertions, 0 deletions

diff --git a/examples/qwerty/qwerty.cpp b/examples/qwerty/qwerty.cpp
new file mode 100644
index 0000000..14bdd8b
--- /dev/null
+++ b/examples/qwerty/qwerty.cpp
@@ -0,0 +1,354 @@
+/****************************************************************************
+**
+** 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 "qwerty.h"
+#include <qapplication.h>
+#include <qfile.h>
+#include <qfiledialog.h>
+#include <qpopupmenu.h>
+#include <qtextstream.h>
+#include <qpainter.h>
+#include <qmessagebox.h>
+#include <qpaintdevicemetrics.h>
+#include <qptrlist.h>
+#include <qfontdialog.h>
+
+#include <qtextcodec.h>
+
+const bool no_writing = FALSE;
+
+static QPtrList<QTextCodec> *codecList = 0;
+
+enum { Uni = 0, MBug = 1, Lat1 = 2, Local = 3, Guess = 4, Codec = 5 };
+
+
+Editor::Editor( QWidget * parent , const char * name )
+    : QWidget( parent, name, WDestructiveClose )
+{
+    m = new QMenuBar( this, "menu" );
+
+    QPopupMenu * file = new QPopupMenu();
+    Q_CHECK_PTR( file );
+    m->insertItem( "&File", file );
+
+    file->insertItem( "&New",   this, SLOT(newDoc()),   ALT+Key_N );
+    file->insertItem( "&Open...",  this, SLOT(load()),     ALT+Key_O );
+    file->insertItem( "&Save...",  this, SLOT(save()),     ALT+Key_S );
+    file->insertSeparator();
+    open_as = new QPopupMenu();
+    file->insertItem( "Open &As",  open_as );
+    save_as = new QPopupMenu();
+    file->insertItem( "Sa&ve As",  save_as );
+    file->insertItem( "Add &Encoding", this, SLOT(addEncoding()) );    
+#ifndef QT_NO_PRINTER
+    file->insertSeparator();
+    file->insertItem( "&Print...", this, SLOT(print()),    ALT+Key_P );
+#endif
+    file->insertSeparator();
+    file->insertItem( "&Close", this, SLOT(close()),ALT+Key_W );
+    file->insertItem( "&Quit",  qApp, SLOT(closeAllWindows()),     ALT+Key_Q );
+
+    connect( save_as, SIGNAL(activated(int)), this, SLOT(saveAsEncoding(int)) );
+    connect( open_as, SIGNAL(activated(int)), this, SLOT(openAsEncoding(int)) );
+    rebuildCodecList();
+
+    QPopupMenu * edit = new QPopupMenu();
+    Q_CHECK_PTR( edit );
+    m->insertItem( "&Edit", edit );
+
+    edit->insertItem( "To &Uppercase",   this, SLOT(toUpper()),   ALT+Key_U );
+    edit->insertItem( "To &Lowercase",   this, SLOT(toLower()),   ALT+Key_L );
+#ifndef QT_NO_FONTDIALOG
+    edit->insertSeparator();
+    edit->insertItem( "&Select Font" ,	 this, SLOT(font()),     ALT+Key_T );
+#endif
+    changed = FALSE;
+    e = new QMultiLineEdit( this, "editor" );
+    connect( e, SIGNAL( textChanged() ), this, SLOT( textChanged() ) );
+
+    // We use Unifont - if you have it installed you'll see all
+    // Unicode character glyphs.
+    //
+    // Unifont only comes in one pixel size, so we cannot let
+    // it change pixel size as the display DPI changes.
+    //
+    QFont unifont("unifont",16,50); unifont.setPixelSize(16);
+    e->setFont( unifont );
+
+    e->setFocus();
+}
+
+Editor::~Editor()
+{
+}
+
+void Editor::font()
+{
+#ifndef QT_NO_FONTDIALOG
+    bool ok;
+    QFont f = QFontDialog::getFont( &ok, e->font() );
+    if ( ok ) {
+        e->setFont( f );
+    }
+#endif
+}
+
+
+
+void Editor::rebuildCodecList()
+{
+    delete codecList;
+    codecList = new QPtrList<QTextCodec>;
+    QTextCodec *codec;
+    int i;
+    for (i = 0; (codec = QTextCodec::codecForIndex(i)); i++)
+	codecList->append( codec );
+    int n = codecList->count();
+    for (int pm=0; pm<2; pm++) {
+	QPopupMenu* menu = pm ? open_as : save_as;
+	menu->clear();
+	QString local = "Local (";
+	local += QTextCodec::codecForLocale()->name();
+	local += ")";
+	menu->insertItem( local, Local );
+	menu->insertItem( "Unicode", Uni );
+	menu->insertItem( "Latin1", Lat1 );
+	menu->insertItem( "Microsoft Unicode", MBug );
+	if ( pm )
+	    menu->insertItem( "[guess]", Guess );
+	for ( i = 0; i < n; i++ )
+	    menu->insertItem( codecList->at(i)->name(), Codec + i );
+    }
+}
+
+void Editor::newDoc()
+{
+    Editor *ed = new Editor;
+    if ( qApp->desktop()->size().width() < 450
+	 || qApp->desktop()->size().height() < 450 ) {
+	ed->showMaximized();
+    } else {
+	ed->resize( 400, 400 );
+	ed->show();
+    }
+}
+
+
+void Editor::load()
+{
+#ifndef QT_NO_FILEDIALOG
+    QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
+    if ( !fn.isEmpty() )
+	load( fn, -1 );
+#endif
+}
+
+void Editor::load( const QString& fileName, int code )
+{
+    QFile f( fileName );
+    if ( !f.open( IO_ReadOnly ) )
+	return;
+
+    e->setAutoUpdate( FALSE );
+
+    QTextStream t(&f);
+    if ( code >= Codec )
+	t.setCodec( codecList->at(code-Codec) );
+    else if ( code == Uni )
+	t.setEncoding( QTextStream::Unicode );
+    else if ( code == MBug )
+	t.setEncoding( QTextStream::UnicodeReverse );
+    else if ( code == Lat1 )
+	t.setEncoding( QTextStream::Latin1 );
+    else if ( code == Guess ) {
+	QFile f(fileName);
+	f.open(IO_ReadOnly);
+	char buffer[256];
+	int l = 256;
+	l=f.readBlock(buffer,l);
+	QTextCodec* codec = QTextCodec::codecForContent(buffer, l);
+	if ( codec ) {
+	    QMessageBox::information(this,"Encoding",QString("Codec: ")+codec->name());
+	    t.setCodec( codec );
+	}
+    }
+    e->setText( t.read() );
+    f.close();
+
+    e->setAutoUpdate( TRUE );
+    e->repaint();
+    setCaption( fileName );
+
+    changed = FALSE;
+}
+
+void Editor::openAsEncoding( int code )
+{
+#ifndef QT_NO_FILEDIALOG
+    //storing filename (proper save) is left as an exercise...
+    QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
+    if ( !fn.isEmpty() )
+	(void) load( fn, code );
+#endif
+}
+
+bool Editor::save()
+{
+#ifndef QT_NO_FILEDIALOG
+    //storing filename (proper save) is left as an exercise...
+    QString fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
+    if ( !fn.isEmpty() )
+	return saveAs( fn );
+    return FALSE;
+#endif
+}
+
+void Editor::saveAsEncoding( int code )
+{
+#ifndef QT_NO_FILEDIALOG
+    //storing filename (proper save) is left as an exercise...
+    QString fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
+    if ( !fn.isEmpty() )
+	(void) saveAs( fn, code );
+#endif
+}
+
+void Editor::addEncoding()
+{
+#ifndef QT_NO_FILEDIALOG
+    QString fn = QFileDialog::getOpenFileName( QString::null, "*.map", this );
+    if ( !fn.isEmpty() ) {
+	QFile f(fn);
+	if (f.open(IO_ReadOnly)) {
+	    if (QTextCodec::loadCharmap(&f)) {
+		rebuildCodecList();
+	    } else {
+		QMessageBox::warning(0,"Charmap error",
+		    "The file did not contain a valid charmap.\n\n"
+		    "A charmap file should look like this:\n"
+		       "  <code_set_name> thename\n"
+		       "  <escape_char> /\n"
+		       "  % alias thealias\n"
+		       "  CHARMAP\n"
+		       "  <tokenname> /x12 <U3456>\n"
+		       "  <tokenname> /xAB/x12 <U0023>\n"
+		       "  ...\n"
+		       "  END CHARMAP\n"
+		);
+	    }
+	}
+    }
+#endif
+}
+
+
+bool Editor::saveAs( const QString& fileName, int code )
+{
+    QFile f( fileName );
+    if ( no_writing || !f.open( IO_WriteOnly ) ) {
+	QMessageBox::warning(this,"I/O Error",
+		    QString("The file could not be opened.\n\n")
+			+fileName);
+	return FALSE;
+    }
+    QTextStream t(&f);
+    if ( code >= Codec )
+	t.setCodec( codecList->at(code-Codec) );
+    else if ( code == Uni )
+	t.setEncoding( QTextStream::Unicode );
+    else if ( code == MBug )
+	t.setEncoding( QTextStream::UnicodeReverse );
+    else if ( code == Lat1 )
+	t.setEncoding( QTextStream::Latin1 );
+    t << e->text();
+    f.close();
+    setCaption( fileName );
+    changed = FALSE;
+    return TRUE;
+}
+
+void Editor::print()
+{
+#ifndef QT_NO_PRINTER
+    if ( printer.setup(this) ) {		// opens printer dialog
+	printer.setFullPage(TRUE);		// we'll set our own margins
+	QPainter p;
+	p.begin( &printer );			// paint on printer
+	p.setFont( e->font() );
+	QFontMetrics fm = p.fontMetrics();
+	QPaintDeviceMetrics metrics( &printer ); // need width/height
+						 // of printer surface
+	const int MARGIN = metrics.logicalDpiX() / 2; // half-inch margin
+	int yPos        = MARGIN;		// y position for each line
+
+	for( int i = 0 ; i < e->numLines() ; i++ ) {
+	    if ( printer.aborted() )
+		break;
+	    if ( yPos + fm.lineSpacing() > metrics.height() - MARGIN ) {
+		// no more room on this page
+		if ( !printer.newPage() )          // start new page
+		    break;                           // some error
+		yPos = MARGIN;			 // back to top of page
+	    }
+	    p.drawText( MARGIN, yPos, metrics.width() - 2*MARGIN,
+			fm.lineSpacing(), ExpandTabs, e->textLine( i ) );
+	    yPos += fm.lineSpacing();
+	}
+	p.end();				// send job to printer
+    }
+#endif
+}
+
+void Editor::resizeEvent( QResizeEvent * )
+{
+    if ( e && m )
+	e->setGeometry( 0, m->height(), width(), height() - m->height() );
+}
+
+void Editor::closeEvent( QCloseEvent *event )
+{
+    event->accept();
+
+    if ( changed ) { // the text has been changed
+	switch ( QMessageBox::warning( this, "Qwerty",
+					"Save changes to Document?",
+					tr("&Yes"),
+					tr("&No"),
+					tr("Cancel"),
+					0, 2) ) {
+	case 0: // yes
+	    if ( save() )
+		event->accept();
+	    else
+		event->ignore();
+	    break;
+	case 1: // no
+	    event->accept();
+	    break;
+	default: // cancel
+	    event->ignore();
+	    break;
+	}
+    }
+}
+
+void Editor::toUpper()
+{
+    e->setText(e->text().upper());
+}
+
+void Editor::toLower()
+{
+    e->setText(e->text().lower());
+}
+
+void Editor::textChanged()
+{
+    changed = TRUE;
+}