comparison layer/WaveformLayer.cpp @ 133:9e6b3e239b9d

* Add zoom thumbwheels to Pane.  Implement horizontal thumbwheel, and
  vertical depending on layer type (supported for waveform and spectrogram,
  though wrong for log-scale spectrogram at the moment).
* Add bare bones of a spectrum layer.
* Add window icon
* Add shortcut for "insert time instant" on laptops without keypad enter (";")
* Delete FFT processing thread when it exits (at least, next time we're asked
  for something interesting)
* Get audio file extensions from the file readers, and thus from libsndfile for
  the wave file reader -- leads to rather a wide combo box in file dialog though
* Better refresh order for spectrogram (redraw centre section first)

 {
     if (m_gain == gain) return;
     m_gain = gain;
     m_cacheValid = false;
     emit layerParametersChanged();
+    emit verticalZoomChanged();
 }
 
 void
 WaveformLayer::setAutoNormalize(bool autoNormalize)
 {

     bool autoNormalize = (attributes.value("autoNormalize") == "1" ||
                           attributes.value("autoNormalize") == "true");
     setAutoNormalize(autoNormalize);
 }
 
-#ifdef INCLUDE_MOCFILES
-#include "WaveformLayer.moc.cpp"
-#endif
-
+int
+WaveformLayer::getVerticalZoomSteps(int &defaultStep) const
+{
+    defaultStep = 50;
+    return 100;
+}
+
+int
+WaveformLayer::getCurrentVerticalZoomStep() const
+{
+    int val = lrint(log10(m_gain) * 20.0) + 50;
+    if (val < 0) val = 0;
+    if (val > 100) val = 100;
+    return val;
+}
+
+void
+WaveformLayer::setVerticalZoomStep(int step)
+{
+    setGain(pow(10, float(step - 50) / 20.0));
+}
+