comparison data/model/WritableWaveFileModel.h @ 179:0ed2b2e26b44

* Tidy up inheritance hierarchy of model classes -- remove ZoomConstraint as
  a base class (make it a member instead) and remove virtual inheritances of
  QObject (no longer necessary).

 #include "WaveFileModel.h"
 
 class WavFileWriter;
 class WavFileReader;
 
-class WritableWaveFileModel : public RangeSummarisableTimeValueModel,
-                              virtual public PowerOfSqrtTwoZoomConstraint
+class WritableWaveFileModel : public RangeSummarisableTimeValueModel
 {
     Q_OBJECT
 
 public:
     WritableWaveFileModel(size_t sampleRate, size_t channels, QString path = "");

     virtual bool addSamples(float **samples, size_t count);
     virtual void sync();
     
     bool isOK() const;
     bool isReady(int *) const;
+
+    const ZoomConstraint *getZoomConstraint() const {
+        static PowerOfSqrtTwoZoomConstraint zc;
+        return &zc;
+    }
 
     size_t getFrameCount() const;
     size_t getChannelCount() const { return m_channels; }
     size_t getSampleRate() const { return m_sampleRate; }