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 /* This file is part of the KDE project
  * Copyright (C) 2009 Alexia Allanic <alexia_allanic@yahoo.fr>
  * Copyright (C) 2009 Jean-Nicolas Artaud <jeannicolasartaud@gmail.com>
  * Copyright (C) 2009 Thorsten Zachmann <zachmann@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "KPrPresentationHighlightWidget.h"
 
 #include <KoPACanvasBase.h>
 
 #include <QMouseEvent>
 #include <QColor>
 #include <QPainter>
 #include <QPainterPath>
 
 KPrPresentationHighlightWidget::KPrPresentationHighlightWidget( KoPACanvasBase * canvas )
 : KPrPresentationToolEventForwarder(canvas)
 , m_size( canvas->canvasWidget()->size() )
 {
     // The focus and the track for have the mouse position every time
     setFocusPolicy( Qt::StrongFocus );
     setMouseTracking( true );
     // Size of the canvas is saved because it's used in the paintEvent
     resize( m_size );
 
     m_center = QCursor::pos();
     update();
 }
 
 KPrPresentationHighlightWidget::~KPrPresentationHighlightWidget()
 {
 }
 
 /** paintEvent call with the update in the mouseMoveEvent */
 void KPrPresentationHighlightWidget::paintEvent( QPaintEvent * event )
 {
     Q_UNUSED(event);
     QPainter painter( this );
     QPen myPen(Qt::black, 0);
     QColor c( Qt::black );
     // TODO make alpha configurable
     c.setAlphaF( 0.5 );
     // The circle we want
     QPainterPath ellipse;
     // TODO make radius configurable
     ellipse.addEllipse( m_center.x() - 75, m_center.y() - 75, 150, 150 );
     // All the 'background'
     QPainterPath myPath;
     myPath.addRect( 0, 0, m_size.rwidth(), m_size.rheight() );
     // We draw the difference
     painter.setPen( myPen );
     painter.fillPath( myPath.subtracted( ellipse ), c );
 }
 
 /** Take the mouse position every time the mouse is moving */
 void KPrPresentationHighlightWidget::mouseMoveEvent( QMouseEvent* e )
 {
     // Save the position of the mouse
     m_center = e->pos();
     // Update the screen : move the circle with a paint event
     // TODO maybe only update what has changed
     update();
 }