Attempt implementing mousewheel zoom into waveform. Badly.

Source/PluginEditor.cpp

@@ -104,6 +104,10 @@ PaulstretchpluginAudioProcessorEditor::PaulstretchpluginAudioProcessorEditor(Pau
 	};
 	m_zs.setRange(processor.m_wave_view_range, true);
 	
+	m_wavecomponent.ViewRangeChangedCallback = [this](Range<double> rng)
+	{
+		m_zs.setRange(rng, false);
+	};
 	m_wavecomponent.TimeSelectionChangedCallback = [this](Range<double> range, int which)
 	{
 		*processor.getFloatParameter(cpi_soundstart) = range.getStart();
@@ -745,6 +749,25 @@ void WaveformComponent::mouseDoubleClick(const MouseEvent & e)
 	repaint();
 }
 
+void WaveformComponent::mouseWheelMove(const MouseEvent & e, const MouseWheelDetails & wd)
+{
+	double factor = 0.9;
+	if (wd.deltaY < 0.0)
+		factor = 1.11111;
+	double normt = viewXToNormalized(e.x);
+	double curlen = m_view_range.getLength();
+	double newlen = curlen * factor;
+	double t0 = jlimit(0.0,1.0, normt - newlen / 2.0);
+	double t1 = jlimit(0.0,1.0, normt + newlen / 2.0);
+	m_view_range = { t0,t1 };
+	//m_view_range = m_view_range.constrainRange({ 0.0, 1.0 });
+	jassert(m_view_range.getStart() >= 0.0 && m_view_range.getEnd() <= 1.0);
+	if (ViewRangeChangedCallback)
+		ViewRangeChangedCallback(m_view_range);
+	m_image_dirty = true;
+	repaint();
+}
+
 Range<double> WaveformComponent::getTimeSelection()
 {
 	if (m_time_sel_start >= 0.0 && m_time_sel_end>m_time_sel_start + 0.001)

Source/PluginEditor.h

@@ -134,11 +134,13 @@ public:
 	std::function<void(double)> SeekCallback;
 	std::function<void(Range<double>, int)> TimeSelectionChangedCallback;
 	std::function<File()> GetFileCallback;
+	std::function<void(Range<double>)> ViewRangeChangedCallback;
 	void mouseDown(const MouseEvent& e) override;
 	void mouseUp(const MouseEvent& e) override;
 	void mouseDrag(const MouseEvent& e) override;
 	void mouseMove(const MouseEvent& e) override;
 	void mouseDoubleClick(const MouseEvent& e) override;
+	void mouseWheelMove(const MouseEvent& e, const MouseWheelDetails& wd) override;
 	Range<double> getTimeSelection();
 	void setTimeSelection(Range<double> rng);
 	void setFileCachedRange(std::pair<Range<double>, Range<double>> rng);