ColorPickerView.h

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#pragma once
 
#include "cdc_ui/IView.h"
#include <cstdint>
 
class Gdey029T94;
 
namespace cdc::ui {

class ColorPickerView : public ViewBase {
public:
    using SaveCallback = void(*)(uint8_t r, uint8_t g, uint8_t b);

    using CancelCallback = void(*)();

    void init(uint8_t r, uint8_t g, uint8_t b);

    void setOnSave(SaveCallback cb) { onSave_ = cb; }

    void setOnCancel(CancelCallback cb) { onCancel_ = cb; }

    void currentColor(uint8_t& r, uint8_t& g, uint8_t& b) const;
 
    // IView
    void render(bool partial) override;
    InputResult onKey(char key) override;
    void onTick(uint32_t nowMs) override;
    const char* getName() const override { return "ColorPickerView"; }
    const char* getFooterHint() const override;
 
private:
    SaveCallback onSave_ = nullptr;
    CancelCallback onCancel_ = nullptr;
 
    int16_t cursorX_ = 0;
    int16_t cursorY_ = 0;
    uint8_t value_   = 255;
 
    uint32_t repeatStartMs_ = 0;
    uint32_t lastRepeatMs_  = 0;
 
    void barycentric(int16_t px, int16_t py,
                     int32_t& aR, int32_t& aG, int32_t& aB) const;
    void clampInsideTriangle();
    void setFromRGB(uint8_t r, uint8_t g, uint8_t b);
    void moveCursor(int16_t dx, int16_t dy);
    void adjustValue(int8_t delta);
    void rawColor(uint8_t& r, uint8_t& g, uint8_t& b) const;
    void drawDitheredBox(Gdey029T94* gfx, int16_t x, int16_t y, int16_t w, int16_t h,
                         uint8_t luminance) const;
    void drawTriangle(Gdey029T94* gfx, int16_t ox, int16_t oy) const;
};
 
} // namespace cdc::ui