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Armin 2026-07-21 02:06:45 +02:00
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Source/WaveformDisplay.h Normal file
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#pragma once
#include <juce_audio_processors/juce_audio_processors.h>
#include "SliceManager.h"
#include <functional>
class WaveformDisplay : public juce::Component,
public juce::Timer,
private juce::ScrollBar::Listener
{
public:
static constexpr float keyWidth = 50.0f;
static constexpr float scrollbarHeight = 14.0f;
WaveformDisplay(SliceManager& sm);
~WaveformDisplay() override;
void paint(juce::Graphics& g) override;
void resized() override;
void timerCallback() override;
void mouseDown(const juce::MouseEvent& e) override;
void mouseDrag(const juce::MouseEvent& e) override;
void mouseUp(const juce::MouseEvent& e) override;
void mouseMove(const juce::MouseEvent& e) override;
void mouseWheelMove(const juce::MouseEvent& e, const juce::MouseWheelDetails& wheel) override;
void setSampleBuffer(const juce::AudioBuffer<float>* buffer, double sampleRate);
void setPlaybackPosition(int sample);
void setActiveSliceIndex(int index);
void setSelectedSlice(int index);
void setOnEmptyAreaClick(std::function<void()> callback);
void setOnKeyClick(std::function<void(int noteNumber)> callback);
void zoomIn();
void zoomOut();
void zoomReset();
int xToSample(int x) const;
int sampleToX(int sample) const;
float getZoomFactor() const { return zoomFactor; }
private:
void drawKeys(juce::Graphics& g, juce::Rectangle<float> bounds);
void drawWaveform(juce::Graphics& g, juce::Rectangle<float> bounds);
void drawSliceMarkers(juce::Graphics& g, juce::Rectangle<float> bounds);
void drawRuler(juce::Graphics& g, juce::Rectangle<float> bounds);
void scrollBarMoved(juce::ScrollBar* scrollBarThatHasMoved, double newRangeStart) override;
void syncScrollBar();
SliceManager& sliceManager;
const juce::AudioBuffer<float>* sampleBuffer = nullptr;
double sampleRate = 44100.0;
float zoomFactor = 1.0f;
float scrollOffset = 0.0f;
int playbackSample = -1;
int activeSliceIndex = -1;
int selectedSliceIndex = -1;
int draggingSliceIndex = -1;
int hoveredSliceIndex = -1;
std::function<void()> onEmptyAreaClick;
std::function<void(int)> onKeyClick;
juce::ScrollBar hScrollBar { false };
juce::TextButton scrollLeftBtn { "<" };
juce::TextButton scrollRightBtn { ">" };
bool updatingScroll = false;
static constexpr int scrollBtnWidth = 16;
juce::AudioBuffer<float> overviewBuffer;
bool overviewDirty = true;
static constexpr int overviewResolution = 2048;
void rebuildOverview();
int getNumSamples() const { return sampleBuffer ? sampleBuffer->getNumSamples() : 0; }
int getVisibleStart() const;
int getVisibleEnd() const;
juce::Rectangle<float> getWaveformArea() const;
int keyRowToMidiNote(int row) const;
int midiNoteToSliceIndex(int note) const;
int findNearestSliceAtPixel(int pixelX, int tolerancePx) const;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(WaveformDisplay)
};