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Source/Components/SampleNavigator.h

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+/*
+  ==============================================================================
+
+    SampleNavigator.h
+    Created: 19 Sep 2023 4:41:12pm
+    Author:  binya
+
+  ==============================================================================
+*/
+
+#pragma once
+#include <JuceHeader.h>
+
+#include "../Sampler/CustomSamplerVoice.h"
+#include "../Utilities/ComponentUtils.h"
+#include "Displays/SamplePainter.h"
+
+enum class NavigatorParts
+{
+    NONE,
+    SAMPLE_START,
+    SAMPLE_END,
+    SAMPLE_FULL
+};
+
+/** A navigator control for the viewing window of the sample editor */
+class SampleNavigator final : public CustomComponent, public ValueListener<int>, public ValueListener<bool>
+{
+    using Drag = NavigatorParts;
+
+public:
+    SampleNavigator(APVTS& apvts, PluginParameters::State& pluginState, const juce::OwnedArray<CustomSamplerVoice>& synthVoices);
+    ~SampleNavigator() override;
+
+    //==============================================================================
+    void setSample(const juce::AudioBuffer<float>& sampleBuffer, float bufferSampleRate, bool resetView);
+
+    /** Call this while recording when more samples have been filled in the sampleBuffer */
+    void sampleUpdated(int oldSize, int newSize);
+    void setRecordingMode(bool recording);
+
+    /** Scrolling can be centered on a sample */
+    void scrollView(const juce::MouseWheelDetails& wheel, int sampleCenter, bool centerZoomOut = false);
+
+    /** Set the view to fit the sample play bounds */
+    void fitView();
+
+private:
+    /** React to view changes */
+    void valueChanged(ListenableValue<int>& source, int newValue) override;
+    void valueChanged(ListenableValue<bool>& source, bool newValue) override;
+
+    void paintOverChildren(juce::Graphics& g) override;
+    void resized() override;
+    void lookAndFeelChanged() override;
+    void enablementChanged() override;
+
+    //==============================================================================
+    void mouseDown(const juce::MouseEvent& event) override;
+    void mouseUp(const juce::MouseEvent& event) override;
+    void mouseMove(const juce::MouseEvent& event) override;
+    void mouseDrag(const juce::MouseEvent& event) override;
+    void mouseWheelMove(const juce::MouseEvent& event, const juce::MouseWheelDetails& wheel) override;
+    void mouseDoubleClick(const juce::MouseEvent& event) override;
+
+    /** Move the view start, maintaining constraints */
+    void moveStart(float change, float sensitivity);
+    void moveEnd(float change, float sensitivity);
+    void moveBoth(float change, float sensitivity);
+
+    NavigatorParts getDraggingTarget(int x, int y) const;
+
+    /** Relative to the bounds of the painter */
+    float sampleToPosition(int sampleIndex) const;
+    int positionToSample(float position) const;
+
+    /** constant sensitivity means that the drag distance is the same regardless of zoom level */
+    float getDragSensitivity(bool constant) const;
+
+    /** In some cases we'd like to adjust the loop start/end positions when they are enabled */
+    void loopHasStartUpdate(bool newValue);
+    void loopHasEndUpdate(bool newValue);
+
+    /** Update the stored position ratios, for use when pinned */
+    void updatePinnedPositions();
+    void moveBoundsToPinnedPositions(bool startToEnd);
+
+    bool isWaveformMode() const;
+
+    //==============================================================================
+    APVTS& apvts;
+    PluginParameters::State& state;
+    UIDummyParam dummyParam;
+    SamplePainter painter;
+    juce::ParameterAttachment gainAttachment;
+    juce::ParameterAttachment monoAttachment;
+
+    const juce::AudioBuffer<float>* sample{ nullptr };
+    float sampleRate;
+    const juce::OwnedArray<CustomSamplerVoice>& synthVoices;
+
+    juce::AudioParameterBool* isWavetableModeDisabled, * isLooping, * loopHasStart, * loopHasEnd;
+    juce::ParameterAttachment isWavetableModeDisabledAttachment, loopAttachment, loopStartAttachment, loopEndAttachment;
+
+    bool dragging{ false };
+    NavigatorParts draggingTarget{ NavigatorParts::NONE };
+    float dragSelectOffset{ 0 };  // When dragging full, this is the offset from the view start where the drag started
+    int lastDragOffset{ 0 };
+
+    bool recordingMode{ false };
+
+    // To keep the bounds in a consistent location when pinned, we need to store the ratios (necessary because zooming in more
+    // causes rounding issues and the position moves drastically).
+    long double pinnedSampleStart{ 0.f }, pinnedSampleEnd{ 0.f }, pinnedLoopStart{ 0.f }, pinnedLoopEnd{ 0.f };
+    bool navigatorUpdate{ false };  // This flag allows the navigator to avoid updating the pinned positions when they are being used to update the bounds
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (SampleNavigator)
+};