monostep/Source/ui/SequencerMatrix.h

#pragma once

#include <JuceHeader.h>

class MonoStepAudioProcessor;

class SequencerMatrix final : public juce::Component
{
public:
    explicit SequencerMatrix (MonoStepAudioProcessor& processor);
    ~SequencerMatrix() override = default;

    std::function<void (int stepIdx)>      onStepSelected;
    std::function<void (int stepIdx, bool gate)> onGateChanged;
    std::function<void (int stepIdx, int semitone)> onNoteChanged;
    std::function<void (int stepIdx, float cents)> onFineChanged;
    std::function<void (int stepIdx, bool slide)> onSlideChanged;

    void setSelectedStep (int stepIdx);
    int getSelectedStep() const { return selectedStep; }

    void setPlayPosition (int stepIdx);

    void paint (juce::Graphics&) override;
    void mouseDown (const juce::MouseEvent&) override;
    void mouseDrag (const juce::MouseEvent&) override;
    void mouseUp (const juce::MouseEvent&) override;

private:
    struct CellRect
    {
        int step;
        int row;
        bool hit;
    };

    CellRect cellAt (const juce::MouseEvent&) const;
    juce::Rectangle<int> matrixBounds() const;
    int rowForSemitone (int semitone) const;
    int semitoneForRow (int row) const;

    MonoStepAudioProcessor& processor;

    float cellW = 24.0f;
    float cellH = 17.0f;
    float labelW = 40.0f;
    float headerH = 24.0f;
    float headerPad = 10.0f;

    int selectedStep = 0;
    int playPos = -1;

    bool dragging = false;
    bool startedActive = false;
    bool moved = false;
    int lastRow = 0;
    int dragStep = 0;

    bool fineDragging = false;
    int fineRefRow = 0;
    float fineStartCents = 0.0f;
    float fineLastCents = -1000.0f;

    bool slideDragging = false;
    bool startedSlideActive = false;
    int slideLastStep = -1;
};