/**************************************************************************** ** ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. ** ** This file is part of an example program for TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #include "scribble.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include const bool no_writing = FALSE; Canvas::Canvas( TQWidget *parent, const char *name ) : TQWidget( parent, name, WStaticContents ), pen( TQt::red, 3 ), polyline(3), mousePressed( FALSE ), buffer( width(), height() ) { if ((tqApp->argc() > 0) && !buffer.load(tqApp->argv()[1])) buffer.fill( colorGroup().base() ); setBackgroundMode( TQWidget::PaletteBase ); #ifndef TQT_NO_CURSOR setCursor( TQt::crossCursor ); #endif } void Canvas::save( const TQString &filename, const TQString &format ) { if ( !no_writing ) buffer.save( filename, format.upper() ); } void Canvas::clearScreen() { buffer.fill( colorGroup().base() ); repaint( FALSE ); } void Canvas::mousePressEvent( TQMouseEvent *e ) { mousePressed = TRUE; polyline[2] = polyline[1] = polyline[0] = e->pos(); } void Canvas::mouseReleaseEvent( TQMouseEvent * ) { mousePressed = FALSE; } void Canvas::mouseMoveEvent( TQMouseEvent *e ) { if ( mousePressed ) { TQPainter painter; painter.begin( &buffer ); painter.setPen( pen ); polyline[2] = polyline[1]; polyline[1] = polyline[0]; polyline[0] = e->pos(); painter.drawPolyline( polyline ); painter.end(); TQRect r = polyline.boundingRect(); r = r.normalize(); r.setLeft( r.left() - penWidth() ); r.setTop( r.top() - penWidth() ); r.setRight( r.right() + penWidth() ); r.setBottom( r.bottom() + penWidth() ); bitBlt( this, r.x(), r.y(), &buffer, r.x(), r.y(), r.width(), r.height() ); } } void Canvas::resizeEvent( TQResizeEvent *e ) { TQWidget::resizeEvent( e ); int w = width() > buffer.width() ? width() : buffer.width(); int h = height() > buffer.height() ? height() : buffer.height(); TQPixmap tmp( buffer ); buffer.resize( w, h ); buffer.fill( colorGroup().base() ); bitBlt( &buffer, 0, 0, &tmp, 0, 0, tmp.width(), tmp.height() ); } void Canvas::paintEvent( TQPaintEvent *e ) { TQWidget::paintEvent( e ); TQMemArray rects = e->region().rects(); for ( uint i = 0; i < rects.count(); i++ ) { TQRect r = rects[(int)i]; bitBlt( this, r.x(), r.y(), &buffer, r.x(), r.y(), r.width(), r.height() ); } } //------------------------------------------------------ Scribble::Scribble( TQWidget *parent, const char *name ) : TQMainWindow( parent, name ) { canvas = new Canvas( this ); setCentralWidget( canvas ); TQToolBar *tools = new TQToolBar( this ); bSave = new TQToolButton( TQPixmap(), "Save", "Save as PNG image", this, TQ_SLOT( slotSave() ), tools ); bSave->setText( "Save as..." ); tools->addSeparator(); bPColor = new TQToolButton( TQPixmap(), "Choose Pen Color", "Choose Pen Color", this, TQ_SLOT( slotColor() ), tools ); bPColor->setText( "Choose Pen Color..." ); tools->addSeparator(); bPWidth = new TQSpinBox( 1, 20, 1, tools ); TQToolTip::add( bPWidth, "Choose Pen Width" ); connect( bPWidth, TQ_SIGNAL( valueChanged( int ) ), this, TQ_SLOT( slotWidth( int ) ) ); bPWidth->setValue( 3 ); tools->addSeparator(); bClear = new TQToolButton( TQPixmap(), "Clear Screen", "Clear Screen", this, TQ_SLOT( slotClear() ), tools ); bClear->setText( "Clear Screen" ); } void Scribble::slotSave() { TQPopupMenu *menu = new TQPopupMenu( 0 ); TQIntDict formats; formats.setAutoDelete( TRUE ); for ( unsigned int i = 0; i < TQImageIO::outputFormats().count(); i++ ) { TQString str = TQString( TQImageIO::outputFormats().at( i ) ); formats.insert( menu->insertItem( TQString( "%1..." ).arg( str ) ), new TQString( str ) ); } menu->setMouseTracking( TRUE ); int id = menu->exec( bSave->mapToGlobal( TQPoint( 0, bSave->height() + 1 ) ) ); if ( id != -1 ) { TQString format = *formats[ id ]; TQString filename = TQFileDialog::getSaveFileName( TQString::null, TQString( "*.%1" ).arg( format.lower() ), this ); if ( !filename.isEmpty() ) canvas->save( filename, format ); } delete menu; } void Scribble::slotColor() { TQColor c = TQColorDialog::getColor( canvas->penColor(), this ); if ( c.isValid() ) canvas->setPenColor( c ); } void Scribble::slotWidth( int w ) { canvas->setPenWidth( w ); } void Scribble::slotClear() { canvas->clearScreen(); }