monoslicer/Source/PluginEditor.h

#pragma once
#include <juce_audio_processors/juce_audio_processors.h>
#include "PluginProcessor.h"
#include "WaveformDisplay.h"

class MonoslicerLookAndFeel : public juce::LookAndFeel_V4
{
public:
    void drawButtonBackground(juce::Graphics& g, juce::Button& button,
                              const juce::Colour& backgroundColour,
                              bool isMouseOverButton, bool isButtonDown) override
    {
        if (backgroundColour.getAlpha() == 0)
            return;

        auto bounds = button.getLocalBounds().toFloat().reduced(0.5f);
        auto cornerSize = 4.0f;

        auto baseColour = backgroundColour.withMultipliedAlpha(button.isEnabled() ? 1.0f : 0.5f);
        g.setColour(baseColour);
        g.fillRoundedRectangle(bounds, cornerSize);

        g.setColour(juce::Colour(0xff444466));
        g.drawRoundedRectangle(bounds, cornerSize, 1.0f);
    }

    void drawButtonText(juce::Graphics& g, juce::TextButton& button,
                        bool isMouseOverButton, bool isButtonDown) override
    {
        auto font = getTextButtonFont(button, button.getHeight());
        g.setFont(font);
        g.setColour(button.findColour(button.getToggleState() ? juce::TextButton::textColourOnId
                                                              : juce::TextButton::textColourOffId)
                       .withMultipliedAlpha(button.isEnabled() ? 1.0f : 0.5f));

        auto textArea = button.getLocalBounds().reduced(6, 1);
        g.drawText(button.getButtonText(), textArea, juce::Justification::centredLeft, true);
    }
};

class VuMeter : public juce::Component, public juce::Timer
{
public:
    VuMeter(MonoslicerProcessor& p) : processor(p) { startTimerHz(30); }
    ~VuMeter() override { stopTimer(); }

    void paint(juce::Graphics& g) override
    {
        auto bounds = getLocalBounds().toFloat();
        float legendW = 20.0f;
        float legendGap = 5.0f;
        float barH = (bounds.getHeight() - 6.0f) / 2.0f;
        float gap = 6.0f;
        float barX = bounds.getX() + legendW + legendGap;
        float barW = bounds.getWidth() - legendW - legendGap;

        float levelL = processor.outputLevelL.load();
        float levelR = processor.outputLevelR.load();

        // Apply falloff decay
        peakL = juce::jmax(levelL, peakL - decayRate);
        peakR = juce::jmax(levelR, peakR - decayRate);
        if (levelL > peakL) peakL = levelL;
        if (levelR > peakR) peakR = levelR;

        auto drawBar = [&](float y, float level, float peak, const juce::String& legend)
        {
            float frac = juce::jlimit(0.0f, 1.0f, level);
            float peakFrac = juce::jlimit(0.0f, 1.0f, peak);

            // Legend text
            g.setColour(juce::Colour(0xff888888));
            g.setFont(juce::Font(10.0f));
            g.drawText(legend, bounds.getX(), y, legendW, barH, juce::Justification::centredRight);

            // Inactive background
            g.setColour(juce::Colour(0xff1a192d));
            g.fillRoundedRectangle(barX, y, barW, barH, 2.0f);

            // Active fill from left
            float fillW = barW * frac;
            g.setColour(juce::Colour(0xff3a73e5));
            g.fillRoundedRectangle(barX, y, fillW, barH, 2.0f);

            // Peak hold indicator
            float peakX = barX + barW * peakFrac - 2.0f;
            g.setColour(juce::Colour(0xff6699cc));
            g.fillRect(peakX, y + 2.0f, 2.0f, barH - 4.0f);
        };

        drawBar(bounds.getY(), levelL, peakL, "L");
        drawBar(bounds.getY() + barH + gap, levelR, peakR, "R");
    }

    void timerCallback() override { repaint(); }

private:
    MonoslicerProcessor& processor;
    float peakL = 0.0f, peakR = 0.0f;
    float decayRate = 0.02f;
};

class MonoslicerEditor : public juce::AudioProcessorEditor,
                         private juce::FileDragAndDropTarget,
                         private juce::Button::Listener,
                         private juce::ComboBox::Listener,
                         private juce::Timer
{
public:
    MonoslicerEditor(MonoslicerProcessor&);
    ~MonoslicerEditor() override;

    void paint(juce::Graphics&) override;
    void resized() override;

    bool isInterestedInFileDrag(const juce::StringArray& files) override;
    void filesDropped(const juce::StringArray& files, int x, int y) override;
    void buttonClicked(juce::Button* button) override;
    void comboBoxChanged(juce::ComboBox* comboBoxThatHasChanged) override;
    void timerCallback() override;

private:
    MonoslicerLookAndFeel lnf;
    MonoslicerProcessor& processorRef;

    WaveformDisplay waveformDisplay;

    // Bottom panel buttons
    juce::TextButton autoSliceButton { "Auto Slice" };
    juce::TextButton clearSlicesButton { "Clear Slices" };

    // Title bar buttons
    juce::TextButton loadSampleButton { "Load" };
    juce::TextButton clearSampleButton { "Clear" };
    juce::TextButton prevSampleButton { "<" };
    juce::TextButton nextSampleButton { ">" };
    juce::TextButton undoButton { "Undo" };
    juce::TextButton redoButton { "Redo" };
    juce::TextButton zoomInButton { "+" };
    juce::TextButton zoomOutButton { "-" };
    juce::TextButton zoomResetButton { "1:1" };
    juce::TextButton scrollLeftButton { "<" };
    juce::TextButton scrollRightButton { ">" };
    juce::ComboBox scaleComboBox;
    juce::ComboBox octaveComboBox;

    static constexpr int baseWidth = 920;
    static constexpr int baseHeight = 606;

    // Slice knobs
    juce::Slider bassSlider, trebleSlider, sensitivitySlider;
    juce::Label bassLabel, trebleLabel, sensitivityLabel;

    // Amp ADSR knobs
    juce::Slider ampAttackSlider, ampDecaySlider, ampSustainSlider, ampReleaseSlider;
    juce::Label ampAttackLabel, ampDecayLabel, ampSustainLabel, ampReleaseLabel;

    // Filter type selector
    juce::ComboBox filterTypeComboBox;
    juce::Label filterTypeLabel;

    // Filter knobs
    juce::Slider filterCutoffSlider, filterResoSlider, filterEnvDepthSlider;
    juce::Label filterCutoffLabel, filterResoLabel, filterEnvDepthLabel;

    using SliderAttachment = juce::AudioProcessorValueTreeState::SliderAttachment;
    using ComboBoxAttachment = juce::AudioProcessorValueTreeState::ComboBoxAttachment;

    // Filter ADSR knobs
    juce::Slider filterAttackSlider, filterDecaySlider, filterSustainSlider, filterReleaseSlider;
    juce::Label filterAttackLabel, filterDecayLabel, filterSustainLabel, filterReleaseLabel;

    // Time-stretch controls
    juce::Slider bpmSlider;
    juce::ComboBox stretchBeatsComboBox;
    juce::TextButton stretchButton { "Match Length" };
    juce::ComboBox keyShiftComboBox;
    juce::Label keyShiftLabel;
    VuMeter vuMeter;
    std::unique_ptr<SliderAttachment> stretchBpmAttachment;
    std::unique_ptr<ComboBoxAttachment> stretchBeatsAttachment;
    std::unique_ptr<ComboBoxAttachment> keyShiftAttachment;
    std::unique_ptr<ComboBoxAttachment> scaleAttachment;
    std::unique_ptr<ComboBoxAttachment> octaveAttachment;

    std::unique_ptr<SliderAttachment> bassAttachment, trebleAttachment, sensitivityAttachment;
    std::unique_ptr<SliderAttachment> ampAttackAttachment, ampDecayAttachment, ampSustainAttachment, ampReleaseAttachment;
    std::unique_ptr<SliderAttachment> filterCutoffAttachment, filterResoAttachment, filterEnvDepthAttachment;
    std::unique_ptr<SliderAttachment> filterAttackAttachment, filterDecayAttachment, filterSustainAttachment, filterReleaseAttachment;
    std::unique_ptr<ComboBoxAttachment> filterTypeAttachment;

    juce::FileChooser fileChooser { "Load Audio File", juce::File{}, "*.wav;*.aiff;*.flac;*.ogg" };
    juce::TextButton fileInfoLabel;
    juce::Label buildInfoLabel;
    juce::File currentLoadedFile;

    void setupSlider(juce::Slider& slider, juce::Label& label, const juce::String& name);
    void attachSlider(juce::Slider& slider, juce::Label& label, const juce::String& name,
                      const juce::String& paramId, std::unique_ptr<SliderAttachment>& attachment);

    int keyClickNote = -1;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(MonoslicerEditor)
};