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 #include <QPalette>
  30
  31 class QcCanvas : public QWidget
  32 {
  33   Q_PROPERTY( bool clearOnRefresh READ clearOnRefresh WRITE setClearOnRefresh );
  34   Q_PROPERTY( bool drawingEnabled READ drawingEnabled WRITE setDrawingEnabled );
  35   Q_PROPERTY( float frameRate READ frameRate WRITE setFrameRate );
  36   Q_PROPERTY( int frameCount READ frameCount );
  37   Q_PROPERTY( QColor background READ background WRITE setBackground );
  38   Q_OBJECT
  39 public:
  40   QcCanvas( QWidget *parent = 0 );
  41   bool drawingEnabled() const { return _paint; }
  42   void setDrawingEnabled( bool b ) { _paint = b; }
  43   bool clearOnRefresh() const { return _clearOnRefresh; }
  44   void setClearOnRefresh( bool b ) { _clearOnRefresh = b; }
  45   float frameRate() const;
  46   void setFrameRate( float rate );
  47   int frameCount() const { return _frameCount; }
  48   QColor background() const { return _bkg; }
  49   void setBackground( const QColor &c );
  50 public Q_SLOTS:
  51   void refresh();
  52   void clear();
  53   void animate( bool toggle );
  54 Q_SIGNALS:
  55   void painting(QPainter*);
  56 protected:
  57   virtual void customEvent( QEvent * );
  58   virtual void changeEvent ( QEvent * );
  59   virtual void resizeEvent( QResizeEvent * );
  60   virtual void paintEvent( QPaintEvent * );
  61   virtual void timerEvent( QTimerEvent * );
  62
  63 private:
  64   QPixmap _pixmap;
  65   bool _paint;
  66   bool _repaintNeeded;
  67   bool _clearOnRefresh;
  68   bool _clearOnce;
  69   bool _resize;
  70   float _fps;
  71   float _fpsActual;
  72   int _timerId;
  73   bool _animating;
  74   int _frameCount; // SC has no idea of unsigned integers
  75
  76   QBasicTimer _fpsTimer;
  77   int _meterPeriod; // msecs between actual fps recalculation
  78   QTime _meterTime;
  79   int _meterFrames;
  80
  81   QColor _bkg;
  82 };
  83
  84 #endif