/************************************************************************
*
* Copyright 2010 Jakob Leben (jakob.leben@gmail.com)
*
* This file is part of SuperCollider Qt GUI.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
************************************************************************/

#pragma once

#include "image_painter.h"

#include <QWidget>
#include <QPixmap>
#include <QBasicTimer>
#include <QTime>
#include <QPalette>
#include <QGLWidget>

//using QcCanvasBase = QGLWidget;
using QcCanvasBase = QWidget;

class QcCanvas : public QcCanvasBase
{
  Q_PROPERTY( bool clearOnRefresh READ clearOnRefresh WRITE setClearOnRefresh );
  Q_PROPERTY( bool drawingEnabled READ drawingEnabled WRITE setDrawingEnabled );
  Q_PROPERTY( float frameRate READ frameRate WRITE setFrameRate );
  Q_PROPERTY( int frameCount READ frameCount );
  Q_PROPERTY( QColor background READ background WRITE setBackground );
  Q_OBJECT
public:
  QcCanvas( QWidget *parent = 0 );
  bool drawingEnabled() const { return _paint; }
  void setDrawingEnabled( bool b ) { _paint = b; }
  bool clearOnRefresh() const { return _clearOnRefresh; }
  void setClearOnRefresh( bool b ) { _clearOnRefresh = b; }
  float frameRate() const;
  void setFrameRate( float rate );
  int frameCount() const { return _frameCount; }
  QColor background() const { return _bkg; }
  void setBackground( const QColor &c );
  Q_INVOKABLE
  void setBackgroundImage( const QtCollider::SharedImage & image, const QRectF & rect,
                           int tileMode, double opacity );
  Q_INVOKABLE
  void removeBackgroundImage() { _bkg_image.clear(); update(); }

public Q_SLOTS:
  void refresh();
  void clear();
  void animate( bool toggle );
Q_SIGNALS:
  void painting(QPainter*);
protected:
  virtual void customEvent( QEvent * );
  virtual void changeEvent ( QEvent * );
  virtual void resizeEvent( QResizeEvent * );
  virtual void paintEvent( QPaintEvent * );
  virtual void timerEvent( QTimerEvent * );

private:
  QPixmap _pixmap;
  bool _paint;
  bool _repaintNeeded;
  bool _clearOnRefresh;
  bool _clearOnce;
  bool _resize;
  float _fps;
  float _fpsActual;
  int _timerId;
  bool _animating;
  int _frameCount; // SC has no idea of unsigned integers

  QBasicTimer _fpsTimer;
  int _meterPeriod; // msecs between actual fps recalculation
  QTime _meterTime;
  int _meterFrames;

  QColor _bkg;
  QtCollider::ImagePainter _bkg_image;
};
