monoslicer/Source/PluginEditor.cpp

#include "PluginEditor.h"

MonoSlicerEditor::MonoSlicerEditor(MonoSlicerProcessor& p)
    : AudioProcessorEditor(p),
      processorRef(p),
      waveformDisplay(p.getSliceManager())
{
    setSize(baseWidth, baseHeight);

    // Title bar buttons
    auto setupTitleBtn = [this](juce::Button& btn, const juce::String& tip) {
        addAndMakeVisible(btn);
        btn.addListener(this);
        btn.setTooltip(tip);
        btn.setColour(juce::TextButton::buttonColourId, juce::Colour(0xff2a2a4a));
    };

    setupTitleBtn(loadSampleButton, "Load audio file");
    setupTitleBtn(prevSampleButton, "Previous sample in folder");
    setupTitleBtn(nextSampleButton, "Next sample in folder");
    setupTitleBtn(undoButton, "Undo");
    setupTitleBtn(redoButton, "Redo");
    setupTitleBtn(zoomInButton, "Zoom In");
    setupTitleBtn(zoomOutButton, "Zoom Out");
    setupTitleBtn(zoomResetButton, "Reset Zoom");

    addAndMakeVisible(scaleComboBox);
    scaleComboBox.addItem("75%", 1);
    scaleComboBox.addItem("100%", 2);
    scaleComboBox.addItem("125%", 3);
    scaleComboBox.addItem("150%", 4);
    scaleComboBox.addItem("175%", 5);
    scaleComboBox.addItem("200%", 6);
    scaleComboBox.addListener(this);
    scaleComboBox.setTooltip("UI Scale");
    scaleAttachment = std::make_unique<ComboBoxAttachment>(processorRef.getAPVTS(), "uiScale", scaleComboBox);

    addAndMakeVisible(octaveComboBox);
    for (int i = -3; i <= 3; ++i)
        octaveComboBox.addItem((i >= 0 ? "+" : "") + juce::String(i) + " oct", i + 4);
    octaveComboBox.setSelectedId(4, juce::dontSendNotification);
    octaveComboBox.setColour(juce::ComboBox::backgroundColourId, juce::Colour(0xff2a2a4a));
    octaveComboBox.setColour(juce::ComboBox::textColourId, juce::Colours::white);
    octaveComboBox.setColour(juce::ComboBox::outlineColourId, juce::Colour(0xff444466));
    octaveComboBox.setColour(juce::ComboBox::arrowColourId, juce::Colours::white);
    octaveComboBox.setTooltip("Octave offset for MIDI input");
    octaveAttachment = std::make_unique<ComboBoxAttachment>(processorRef.getAPVTS(), "octaveOffset", octaveComboBox);

    // Bottom panel buttons
    addAndMakeVisible(autoSliceButton);
    autoSliceButton.addListener(this);
    addAndMakeVisible(clearSlicesButton);
    clearSlicesButton.addListener(this);

    addAndMakeVisible(waveformDisplay);

    // Slice knobs
    attachSlider(bassSlider, bassLabel, "Bass", "bass", bassAttachment);
    attachSlider(trebleSlider, trebleLabel, "Treble", "treble", trebleAttachment);
    attachSlider(sensitivitySlider, sensitivityLabel, "Sens.", "sensitivity", sensitivityAttachment);

    // Amp ADSR
    attachSlider(ampAttackSlider, ampAttackLabel, "A Atk", "ampAttack", ampAttackAttachment);
    attachSlider(ampDecaySlider, ampDecayLabel, "A Dcy", "ampDecay", ampDecayAttachment);
    attachSlider(ampSustainSlider, ampSustainLabel, "A Sus", "ampSustain", ampSustainAttachment);
    attachSlider(ampReleaseSlider, ampReleaseLabel, "A Rel", "ampRelease", ampReleaseAttachment);

    // Filter knobs
    attachSlider(filterCutoffSlider, filterCutoffLabel, "Cutoff", "filterCutoff", filterCutoffAttachment);
    attachSlider(filterResoSlider, filterResoLabel, "Reso", "filterReso", filterResoAttachment);
    attachSlider(filterEnvDepthSlider, filterEnvDepthLabel, "Env Dph", "filterEnvDepth", filterEnvDepthAttachment);

    // Filter type combo
    addAndMakeVisible(filterTypeComboBox);
    filterTypeComboBox.addItem("LP12", 1);
    filterTypeComboBox.addItem("LP24", 2);
    filterTypeComboBox.addItem("HP", 3);
    filterTypeComboBox.addItem("BP", 4);
    filterTypeComboBox.addItem("Notch", 5);
    filterTypeAttachment = std::make_unique<ComboBoxAttachment>(processorRef.getAPVTS(), "filterType", filterTypeComboBox);
    filterTypeComboBox.setColour(juce::ComboBox::backgroundColourId, juce::Colour(0xff2a2a4a));
    filterTypeComboBox.setColour(juce::ComboBox::textColourId, juce::Colours::white);
    filterTypeComboBox.setColour(juce::ComboBox::outlineColourId, juce::Colour(0xff444466));
    filterTypeComboBox.setColour(juce::ComboBox::arrowColourId, juce::Colours::white);

    // Filter ADSR
    attachSlider(filterAttackSlider, filterAttackLabel, "F Atk", "filterAttack", filterAttackAttachment);
    attachSlider(filterDecaySlider, filterDecayLabel, "F Dcy", "filterDecay", filterDecayAttachment);
    attachSlider(filterSustainSlider, filterSustainLabel, "F Sus", "filterSustain", filterSustainAttachment);
    attachSlider(filterReleaseSlider, filterReleaseLabel, "F Rel", "filterRelease", filterReleaseAttachment);

    // Time-stretch controls
    addAndMakeVisible(bpmSlider);
    bpmSlider.setSliderStyle(juce::Slider::IncDecButtons);
    bpmSlider.setTextBoxStyle(juce::Slider::TextBoxLeft, false, 50, 20);
    bpmSlider.setRange(20.0, 300.0, 1.0);
    bpmSlider.setColour(juce::Slider::thumbColourId, juce::Colours::transparentBlack);
    bpmSlider.setColour(juce::Slider::rotarySliderFillColourId, juce::Colour(0xffee8833));
    bpmSlider.setColour(juce::Slider::textBoxTextColourId, juce::Colours::white);
    bpmSlider.setColour(juce::Slider::textBoxBackgroundColourId, juce::Colour(0xff2a2a4a));
    bpmSlider.setColour(juce::Slider::textBoxOutlineColourId, juce::Colour(0xff444466));
    bpmSlider.setColour(juce::Slider::backgroundColourId, juce::Colour(0xff2a2a4a));
    bpmSlider.setColour(juce::Slider::trackColourId, juce::Colour(0xffee8833));
    stretchBpmAttachment = std::make_unique<SliderAttachment>(processorRef.getAPVTS(), "stretchBpm", bpmSlider);

    addAndMakeVisible(stretchBeatsComboBox);
    stretchBeatsComboBox.addItem("1 beat", 1);
    stretchBeatsComboBox.addItem("2 beats", 2);
    stretchBeatsComboBox.addItem("4 beats", 3);
    stretchBeatsComboBox.addItem("8 beats", 4);
    stretchBeatsComboBox.addItem("16 beats", 5);
    stretchBeatsComboBox.addItem("32 beats", 6);
    stretchBeatsComboBox.setSelectedId(3, juce::dontSendNotification); // default 4 beats
    stretchBeatsComboBox.setColour(juce::ComboBox::backgroundColourId, juce::Colour(0xff2a2a4a));
    stretchBeatsComboBox.setColour(juce::ComboBox::textColourId, juce::Colours::white);
    stretchBeatsComboBox.setColour(juce::ComboBox::outlineColourId, juce::Colour(0xff444466));
    stretchBeatsComboBox.setColour(juce::ComboBox::arrowColourId, juce::Colours::white);
    stretchBeatsAttachment = std::make_unique<ComboBoxAttachment>(processorRef.getAPVTS(), "stretchBeats", stretchBeatsComboBox);

    addAndMakeVisible(stretchButton);
    stretchButton.addListener(this);
    stretchButton.setColour(juce::TextButton::buttonColourId, juce::Colour(0xff2a2a4a));

    // Key shift combo
    addAndMakeVisible(keyShiftComboBox);
    for (int i = -12; i <= 12; ++i)
        keyShiftComboBox.addItem((i >= 0 ? "+" : "") + juce::String(i) + " st", i + 13);
    keyShiftComboBox.setSelectedId(13, juce::dontSendNotification); // 0 semitones
    keyShiftComboBox.setColour(juce::ComboBox::backgroundColourId, juce::Colour(0xff2a2a4a));
    keyShiftComboBox.setColour(juce::ComboBox::textColourId, juce::Colours::white);
    keyShiftComboBox.setColour(juce::ComboBox::outlineColourId, juce::Colour(0xff444466));
    keyShiftComboBox.setColour(juce::ComboBox::arrowColourId, juce::Colours::white);
    addAndMakeVisible(keyShiftLabel);
    keyShiftLabel.setText("Shift", juce::dontSendNotification);
    keyShiftLabel.setJustificationType(juce::Justification::centred);
    keyShiftLabel.setFont(juce::Font(juce::FontOptions(11.0f)));
    keyShiftLabel.attachToComponent(&keyShiftComboBox, false);
    keyShiftAttachment = std::make_unique<ComboBoxAttachment>(processorRef.getAPVTS(), "keyShift", keyShiftComboBox);

    auto allKnobs = { &bassSlider, &trebleSlider, &sensitivitySlider,
                      &ampAttackSlider, &ampDecaySlider, &ampSustainSlider, &ampReleaseSlider,
                      &filterCutoffSlider, &filterResoSlider, &filterEnvDepthSlider,
                      &filterAttackSlider, &filterDecaySlider, &filterSustainSlider, &filterReleaseSlider };

    for (auto* slider : allKnobs)
    {
        slider->setSliderStyle(juce::Slider::RotaryVerticalDrag);
        slider->setTextBoxStyle(juce::Slider::TextBoxBelow, false, 40, 14);
        slider->setColour(juce::Slider::thumbColourId, juce::Colours::transparentBlack);
        slider->setColour(juce::Slider::rotarySliderFillColourId, juce::Colour(0xffee8833));
        slider->setColour(juce::Slider::rotarySliderOutlineColourId, juce::Colour(0xff332211));
    }

    if (processorRef.getSampleBuffer().getNumSamples() > 0)
    {
        waveformDisplay.setSampleBuffer(&processorRef.getSampleBuffer(), processorRef.getSampleRateLoaded());
    }

    waveformDisplay.setOnEmptyAreaClick([this] {
        buttonClicked(&loadSampleButton);
    });

    waveformDisplay.setOnKeyClick([this](int midiNote) {
        keyClickNote = midiNote;
        int pitchClass = midiNote % 12;
        int sliceIdx = -1;
        const auto& slices = processorRef.getSliceManager().getSlices();
        for (int i = 0; i < static_cast<int>(slices.size()); ++i)
        {
            if (slices[static_cast<size_t>(i)].midiNote == pitchClass)
            {
                sliceIdx = i;
                break;
            }
        }
        if (sliceIdx >= 0)
            processorRef.triggerSlice(sliceIdx, 0.8f);
        else
            processorRef.triggerSlice(0, 0.8f);
    });

    startTimerHz(30);
}

MonoSlicerEditor::~MonoSlicerEditor()
{
    autoSliceButton.removeListener(this);
    clearSlicesButton.removeListener(this);
    scaleComboBox.removeListener(this);
    loadSampleButton.removeListener(this);
    prevSampleButton.removeListener(this);
    nextSampleButton.removeListener(this);
    undoButton.removeListener(this);
    redoButton.removeListener(this);
    zoomInButton.removeListener(this);
    zoomOutButton.removeListener(this);
    zoomResetButton.removeListener(this);
    stretchButton.removeListener(this);
}

void MonoSlicerEditor::setupSlider(juce::Slider& slider, juce::Label& label, const juce::String& name)
{
    addAndMakeVisible(slider);
    addAndMakeVisible(label);
    label.setText(name, juce::dontSendNotification);
    label.attachToComponent(&slider, false);
    label.setJustificationType(juce::Justification::centred);
    label.setFont(juce::Font(juce::FontOptions(13.0f)));
}

void MonoSlicerEditor::attachSlider(juce::Slider& slider, juce::Label& label, const juce::String& name,
                                     const juce::String& paramId, std::unique_ptr<SliderAttachment>& attachment)
{
    setupSlider(slider, label, name);
    attachment = std::make_unique<SliderAttachment>(processorRef.getAPVTS(), paramId, slider);
}

void MonoSlicerEditor::paint(juce::Graphics& g)
{
    g.fillAll(juce::Colour(0xff0f0f1a));

    auto titleBar = getLocalBounds().removeFromTop(40);
    g.setColour(juce::Colour(0xff1a1a30));
    g.fillRect(titleBar);

    g.setColour(juce::Colours::white);
    g.setFont(juce::Font(juce::FontOptions(15.0f, juce::Font::bold)));
    g.drawText("MONOSLICER", juce::Rectangle<int>(10, titleBar.getY(), 110, titleBar.getHeight()),
               juce::Justification::centredLeft);

    g.setColour(juce::Colour(0xff333355));
    g.drawHorizontalLine(40, 0.0f, static_cast<float>(getWidth()));
}

void MonoSlicerEditor::resized()
{
    float scaleX = static_cast<float>(getWidth()) / static_cast<float>(baseWidth);
    float scaleY = static_cast<float>(getHeight()) / static_cast<float>(baseHeight);
    setTransform(juce::AffineTransform::scale(juce::jmin(scaleX, scaleY)));

    auto bounds = getLocalBounds();
    auto titleBar = bounds.removeFromTop(40);

    int tx = 120;

    auto placeBtn = [&](juce::Button& btn, int w) {
        btn.setBounds(tx, titleBar.getY() + 8, w, 24);
        tx += w + 3;
    };

    placeBtn(loadSampleButton, 44);
    placeBtn(prevSampleButton, 24);
    placeBtn(nextSampleButton, 24);

    tx += 10;
    placeBtn(undoButton, 44);
    placeBtn(redoButton, 44);

    tx += 10;
    placeBtn(zoomOutButton, 28);
    placeBtn(zoomResetButton, 32);
    placeBtn(zoomInButton, 28);

    scaleComboBox.setBounds(titleBar.getRight() - 100, titleBar.getY() + 8, 90, 24);
    octaveComboBox.setBounds(titleBar.getRight() - 176, titleBar.getY() + 8, 72, 24);

    auto bottomPanel = bounds.removeFromBottom(200);
    auto bottomRow = bottomPanel.reduced(8);

    // Bottom panel: buttons + stretch | amp ADSR | filter ADSR | filter knobs
    auto leftArea = bottomRow.removeFromLeft(200);
    {
        auto btnArea = leftArea.removeFromTop(28);
        autoSliceButton.setBounds(btnArea.getX(), btnArea.getY(), btnArea.getWidth() / 2 - 2, 24);
        clearSlicesButton.setBounds(btnArea.getX() + btnArea.getWidth() / 2 + 2, btnArea.getY(), btnArea.getWidth() / 2 - 2, 24);
        leftArea.removeFromTop(4);
        // Stretch controls
        int stretchW = leftArea.getWidth();
        int col1W = stretchW / 2 - 2;
        int col2W = stretchW / 2 - 2;
        bpmSlider.setBounds(leftArea.getX(), leftArea.getY(), col1W, 20);
        stretchBeatsComboBox.setBounds(leftArea.getX() + col1W + 4, leftArea.getY(), col2W, 20);
        leftArea.removeFromTop(24);
        stretchButton.setBounds(leftArea.getX(), leftArea.getY(), stretchW, 22);
        leftArea.removeFromTop(26);
        leftArea.removeFromTop(20);
        keyShiftComboBox.setBounds(leftArea.getX(), leftArea.getY(), stretchW, 20);
    }

    bottomRow.removeFromLeft(8);

    auto ampSection = bottomRow.removeFromLeft(230);
    {
        int kw = ampSection.getWidth() / 4;
        int k = 0;
        for (auto* s : { &ampAttackSlider, &ampDecaySlider, &ampSustainSlider, &ampReleaseSlider })
        {
            s->setBounds(ampSection.getX() + k * kw, ampSection.getY(), kw, ampSection.getHeight());
            ++k;
        }
    }

    bottomRow.removeFromLeft(8);

    auto fltAdsSection = bottomRow.removeFromLeft(230);
    {
        int kw = fltAdsSection.getWidth() / 4;
        int k = 0;
        for (auto* s : { &filterAttackSlider, &filterDecaySlider, &filterSustainSlider, &filterReleaseSlider })
        {
            s->setBounds(fltAdsSection.getX() + k * kw, fltAdsSection.getY(), kw, fltAdsSection.getHeight());
            ++k;
        }
    }

    bottomRow.removeFromLeft(8);

    auto filterArea = bottomRow;
    {
        int comboW = 56;
        int gap = 4;
        int knobAreaX = filterArea.getX() + comboW + gap;
        int knobAreaW = filterArea.getWidth() - comboW - gap;
        int kw = knobAreaW / 3;
        int topRowH = 80;
        int bottomRowGap = 24;
        int bottomRowH = filterArea.getHeight() - topRowH - bottomRowGap;
        filterTypeComboBox.setBounds(filterArea.getX(), filterArea.getY() + 2, comboW, 20);
        filterCutoffSlider.setBounds(knobAreaX, filterArea.getY(), kw, topRowH);
        filterResoSlider.setBounds(knobAreaX + kw, filterArea.getY(), kw, topRowH);
        filterEnvDepthSlider.setBounds(knobAreaX + kw * 2, filterArea.getY(), kw, topRowH);
        int bottomY = filterArea.getY() + topRowH + bottomRowGap;
        bassSlider.setBounds(knobAreaX, bottomY, kw, bottomRowH);
        trebleSlider.setBounds(knobAreaX + kw, bottomY, kw, bottomRowH);
        sensitivitySlider.setBounds(knobAreaX + kw * 2, bottomY, kw, bottomRowH);
    }

    auto mainArea = bounds.reduced(8);
    waveformDisplay.setBounds(mainArea);
}

void MonoSlicerEditor::timerCallback()
{
    if (processorRef.stateRestored.exchange(false))
    {
        waveformDisplay.setSampleBuffer(&processorRef.getSampleBuffer(), processorRef.getSampleRateLoaded());
    }

    waveformDisplay.setPlaybackPosition(processorRef.currentPlaybackSample.load());
    waveformDisplay.setActiveSliceIndex(processorRef.currentActiveSlice.load());
    waveformDisplay.setSelectedSlice(processorRef.selectedSlice.load());

    // Release key click note when mouse is released
    if (keyClickNote >= 0)
    {
        auto& editor = *this;
        if (!editor.isMouseButtonDown())
        {
            processorRef.releaseSlice();
            keyClickNote = -1;
        }
    }
}

void MonoSlicerEditor::buttonClicked(juce::Button* button)
{
    if (button == &loadSampleButton)
    {
        fileChooser.launchAsync(juce::FileBrowserComponent::openMode | juce::FileBrowserComponent::canSelectFiles,
            [this](const juce::FileChooser& fc)
            {
                auto file = fc.getResult();
                if (file.existsAsFile())
                {
                    processorRef.loadAudioFile(file);
                    waveformDisplay.setSampleBuffer(&processorRef.getSampleBuffer(), processorRef.getSampleRateLoaded());

                }
            });
    }
    else if (button == &prevSampleButton)
    {
        processorRef.loadPreviousSample();
        waveformDisplay.setSampleBuffer(&processorRef.getSampleBuffer(), processorRef.getSampleRateLoaded());

    }
    else if (button == &nextSampleButton)
    {
        processorRef.loadNextSample();
        waveformDisplay.setSampleBuffer(&processorRef.getSampleBuffer(), processorRef.getSampleRateLoaded());

    }
    else if (button == &autoSliceButton)
    {
        processorRef.getSliceManager().autoSlice();

    }
    else if (button == &clearSlicesButton)
    {
        processorRef.getSliceManager().clearSlices();
    }
    else if (button == &undoButton)
    {
        processorRef.getSliceManager().undo();
    }
    else if (button == &redoButton)
    {
        processorRef.getSliceManager().redo();
    }
    else if (button == &stretchButton)
    {
        int beatsId = stretchBeatsComboBox.getSelectedId();
        int numBeats = 4;
        switch (beatsId)
        {
            case 1: numBeats = 1; break;
            case 2: numBeats = 2; break;
            case 3: numBeats = 4; break;
            case 4: numBeats = 8; break;
            case 5: numBeats = 16; break;
            case 6: numBeats = 32; break;
            default: numBeats = 4; break;
        }
        float bpm = static_cast<float>(bpmSlider.getValue());
        processorRef.stretchToBeats(numBeats, bpm);
        waveformDisplay.setSampleBuffer(&processorRef.getSampleBuffer(), processorRef.getSampleRateLoaded());

    }
    else if (button == &zoomInButton)
    {
        waveformDisplay.zoomIn();
    }
    else if (button == &zoomOutButton)
    {
        waveformDisplay.zoomOut();
    }
    else if (button == &zoomResetButton)
    {
        waveformDisplay.zoomReset();
    }
}

void MonoSlicerEditor::comboBoxChanged(juce::ComboBox* comboBoxThatHasChanged)
{
    if (comboBoxThatHasChanged == &scaleComboBox)
    {
        static const float scales[] = { 0.75f, 1.0f, 1.25f, 1.5f, 1.75f, 2.0f };
        int id = scaleComboBox.getSelectedId();
        if (id >= 1 && id <= 6)
        {
            float scale = scales[id - 1];
            setSize(static_cast<int>(baseWidth * scale), static_cast<int>(baseHeight * scale));
        }
    }
}

bool MonoSlicerEditor::isInterestedInFileDrag(const juce::StringArray& files)
{
    for (const auto& f : files)
        if (f.endsWithIgnoreCase(".wav") || f.endsWithIgnoreCase(".aiff") ||
            f.endsWithIgnoreCase(".flac") || f.endsWithIgnoreCase(".ogg"))
            return true;
    return false;
}

void MonoSlicerEditor::filesDropped(const juce::StringArray& files, int, int)
{
    for (const auto& f : files)
    {
        juce::File file(f);
        if (file.existsAsFile())
        {
            processorRef.loadAudioFile(file);
            waveformDisplay.setSampleBuffer(&processorRef.getSampleBuffer(), processorRef.getSampleRateLoaded());
    
            break;
        }
    }
}