QtCollider/widgets/QcCanvas.h

   1 /************************************************************************
   2 *
   3 * Copyright 2010 Jakob Leben (jakob.leben@gmail.com)
   4 *
   5 * This file is part of SuperCollider Qt GUI.
   6 *
   7 * This program is free software: you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation, either version 3 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *
  20 ************************************************************************/
  21
  22 #ifndef QC_CANVAS_H
  23 #define QC_CANVAS_H
  24
  25 #include <QWidget>
  26 #include <QPixmap>
  27 #include <QBasicTimer>
  28 #include <QTime>
  29
  30 class QcCanvas : public QWidget
  31 {
  32   Q_PROPERTY( bool clearOnRefresh READ clearOnRefresh WRITE setClearOnRefresh );
  33   Q_PROPERTY( bool drawingEnabled READ drawingEnabled WRITE setDrawingEnabled );
  34   Q_PROPERTY( float frameRate READ frameRate WRITE setFrameRate );
  35   Q_PROPERTY( int frameCount READ frameCount );
  36   Q_OBJECT
  37 public:
  38   QcCanvas( QWidget *parent = 0 );
  39   bool drawingEnabled() const { return _paint; }
  40   void setDrawingEnabled( bool b ) { _paint = b; }
  41   bool clearOnRefresh() const { return _clearOnRefresh; }
  42   void setClearOnRefresh( bool b ) { _clearOnRefresh = b; }
  43   float frameRate() const;
  44   void setFrameRate( float rate );
  45   int frameCount() const { return _frameCount; }
  46 public Q_SLOTS:
  47   void refresh();
  48   void clear();
  49   void animate( bool toggle );
  50 Q_SIGNALS:
  51   void painting(QPainter*);
  52 protected:
  53   virtual void customEvent( QEvent * );
  54   virtual void changeEvent ( QEvent * );
  55   virtual void resizeEvent( QResizeEvent * );
  56   virtual void paintEvent( QPaintEvent * );
  57   virtual void timerEvent( QTimerEvent * );
  58
  59 private:
  60   QPixmap _pixmap;
  61   bool _paint;
  62   bool _repaintNeeded;
  63   bool _clearOnRefresh;
  64   bool _clearOnce;
  65   bool _resize;
  66   float _fps;
  67   float _fpsActual;
  68   int _timerId;
  69   bool _animating;
  70   int _frameCount; // SC has no idea of unsigned integers
  71
  72   QBasicTimer _fpsTimer;
  73   int _meterPeriod; // msecs between actual fps recalculation
  74   QTime _meterTime;
  75   int _meterFrames;
  76
  77 };
  78
  79 #endif