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Source/Components/SampleEditor.h

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+/*
+  ==============================================================================
+
+    SampleEditorOverlay.h
+    Created: 19 Sep 2023 2:03:29pm
+    Author:  binya
+
+  ==============================================================================
+*/
+
+#pragma once
+#include <JuceHeader.h>
+
+#include "../Sampler/CustomSamplerVoice.h"
+#include "../Utilities/ComponentUtils.h"
+#include "RangeSelector.h"
+#include "Displays/SamplePainter.h"
+
+/** An enum of selectable parts of the editor overlay. */
+enum class EditorParts 
+{
+    NONE,
+    SAMPLE_START,
+    SAMPLE_END,
+    LOOP_START,
+    LOOP_END,
+};
+
+/** The overlay draws the bounds and active voices, to be placed over the main editor object */
+class SampleEditorOverlay final : public CustomComponent, public ValueListener<int>
+{
+public:
+    SampleEditorOverlay(const APVTS& apvts, PluginParameters::State& pluginState, const juce::OwnedArray<CustomSamplerVoice>& synthVoices, UIDummyParam& dummy, CustomComponent* forwardEventsTo = nullptr);
+    ~SampleEditorOverlay() override;
+
+    void setSample(const juce::AudioBuffer<float>& sample, float bufferSampleRate);
+
+    /** Utility functions */
+    float sampleToPosition(int sampleIndex) const;
+    int positionToSample(float position) const;
+
+    bool isWaveformMode() const;
+
+private:
+    void valueChanged(ListenableValue<int>& source, int newValue) override;
+
+    void paint(juce::Graphics&) override;
+    void resized() override;
+    void enablementChanged() override;
+    void lookAndFeelChanged() override;
+
+    void mouseMove(const juce::MouseEvent& event) override;
+    void mouseDown(const juce::MouseEvent& event) override;
+    void mouseUp(const juce::MouseEvent& event) override;
+    void mouseDrag(const juce::MouseEvent& event) override;
+    void mouseEnter(const juce::MouseEvent&) override { repaint(); };
+    void mouseExit(const juce::MouseEvent&) override { repaint(); };
+
+    juce::String getCustomHelpText() override;
+
+    EditorParts getClosestPartInRange(int x, int y) const;
+    float getBoundsWidth() const;
+
+    //==============================================================================
+    const juce::AudioBuffer<float>* sampleBuffer{ nullptr };
+    float sampleRate{ 0.f };
+    const juce::OwnedArray<CustomSamplerVoice>& synthVoices;
+    UIDummyParam& dummyParam;
+
+    ListenableAtomic<int>& viewStart, & viewEnd, & sampleStart, & sampleEnd, & loopStart, & loopEnd;
+    ListenableAtomic<bool>& pinnedBounds;
+    juce::AudioParameterBool* isWavetableModeDisabled, * isLooping, * loopingHasStart, * loopingHasEnd;
+    juce::ParameterAttachment isWavetableModeDisabledAttachment, isLoopingAttachment, loopingHasStartAttachment, loopingHasEndAttachment;
+
+    bool dragging{ false };
+    EditorParts draggingTarget{ EditorParts::NONE };
+
+    melatonin::DropShadow boundsShadow{
+        {defaultTheme.slate.withAlpha(0.25f), 2, {1, 0}},
+        {defaultTheme.slate.withAlpha(0.25f), 2, {-1, 0}}
+    };
+    melatonin::DropShadow loopBoundsShadow{
+        {defaultTheme.loop.withAlpha(0.25f), 2, {1, 0}},
+        {defaultTheme.loop.withAlpha(0.25f), 2, {-1, 0}}
+    };
+    melatonin::InnerShadow innerShadow{
+        {defaultTheme.slate.withAlpha(0.25f), 3, {0, 2}},
+        {defaultTheme.slate.withAlpha(0.25f), 3, {0, -2}}
+    };
+
+    juce::Path handleLeft, handleRight;
+
+    /** The overlay can be provided with a component to forward unhandled mouse events to.
+        This currently only forwards particular mouse events, but can be expanded if we need.
+     */
+    CustomComponent* forwardMouseEvents{ nullptr };
+};
+
+/*
+  ==============================================================================
+
+    SampleEditor.h
+    Created: 19 Sep 2023 2:03:29pm
+    Author:  binya
+
+  ==============================================================================
+*/
+
+/** The SampleEditor is the main component responsible for editing a sample. It allows for setting
+    the bounds for playback and looping. It also allows for bounds selection for operations that need it.
+    It reacts to viewport changes from the sample navigator. Like the navigator, it also displays active voices.
+*/
+class SampleEditor final : public CustomComponent, public ValueListener<int>
+{
+public:
+    /** The SampleEditor requires reference to the apvts, pluginState, synthVoices, and a
+        function reference to scroll the navigator (navigator.scrollView).
+    */
+    SampleEditor(APVTS& apvts, PluginParameters::State& pluginState, const juce::OwnedArray<CustomSamplerVoice>& synthVoices, 
+        const std::function<void(const juce::MouseWheelDetails& details, int centerSample)>& navScrollFunc);
+    ~SampleEditor() override;
+
+    //==============================================================================
+    void setSample(const juce::AudioBuffer<float>& sample, float bufferSampleRate, bool resetView);
+
+    /** Recording mode hides the bounds selection and turns the editor into a view only
+        display while a recording is in progress.
+    */
+    void setRecordingMode(bool recording);
+    bool isRecordingMode() const;
+    void sampleUpdated(int oldSize, int newSize); // Currently used for recording
+
+    //==============================================================================
+    /** Prompts the user to select a range of samples within the current viewport. */
+    void promptBoundsSelection(const std::function<void(int startSample, int endSample)>& callback);
+    void cancelBoundsSelection();
+    bool isInBoundsSelection() const;
+
+private:
+    void valueChanged(ListenableValue<int>& source, int newValue) override;
+
+    void resized() override;
+    void enablementChanged() override;
+
+    void mouseWheelMove(const juce::MouseEvent& event, const juce::MouseWheelDetails& wheel) override;
+
+    int positionToSample(float position) const;
+
+    //==============================================================================
+    APVTS& apvts;
+    PluginParameters::State& pluginState;
+    UIDummyParam dummyParam;
+    const juce::AudioBuffer<float>* sampleBuffer{ nullptr };
+    float sampleRate{ 0.f };
+
+    SamplePainter painter;
+    juce::ParameterAttachment gainAttachment;
+    juce::ParameterAttachment monoAttachment;
+
+    SampleEditorOverlay overlay;
+    RangeSelector boundsSelector;
+
+    bool recordingMode{ false };
+
+    std::function<void(const juce::MouseWheelDetails& details, int centerSample)> scrollFunc;
+    
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (SampleEditor)
+};