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