Add midi editor Y pos indicator

Author: FangCunWuChang

src/ui/component/editor/MIDIContentViewer.cpp

@@ -5,8 +5,11 @@
 
 MIDIContentViewer::MIDIContentViewer(
 	const WheelFunc& wheelFunc,
-	const WheelAltFunc& wheelAltFunc)
-	: wheelFunc(wheelFunc), wheelAltFunc(wheelAltFunc) {
+	const WheelAltFunc& wheelAltFunc,
+	const MouseYPosFunc& mouseYPosFunc,
+	const MouseLeaveFunc& mouseLeaveFunc)
+	: wheelFunc(wheelFunc), wheelAltFunc(wheelAltFunc),
+	mouseYPosFunc(mouseYPosFunc), mouseLeaveFunc(mouseLeaveFunc) {
 	/** Look And Feel */
 	this->setLookAndFeel(
 		LookAndFeelFactory::getInstance()->forMidiContent());
@@ -177,6 +180,21 @@ void MIDIContentViewer::paintOverChildren(juce::Graphics& g) {
 	//}
 }
 
+void MIDIContentViewer::mouseMove(const juce::MouseEvent& event) {
+	/** Send Y Pos */
+	this->mouseYPosFunc(event.position.getY());
+}
+
+void MIDIContentViewer::mouseDrag(const juce::MouseEvent& event) {
+	/** Send Y Pos */
+	this->mouseYPosFunc(event.position.getY());
+}
+
+void MIDIContentViewer::mouseExit(const juce::MouseEvent& event) {
+	/** Send Mouse Exit */
+	this->mouseLeaveFunc();
+}
+
 void MIDIContentViewer::mouseWheelMove(
 	const juce::MouseEvent& event,
 	const juce::MouseWheelDetails& wheel) {

src/ui/component/editor/MIDIContentViewer.h

@@ -9,9 +9,13 @@ class MIDIContentViewer final
 public:
 	using WheelFunc = std::function<void(float, bool)>;
 	using WheelAltFunc = std::function<void(double, double, float, bool)>;
+	using MouseYPosFunc = std::function<void(float)>;
+	using MouseLeaveFunc = std::function<void()>;
 	MIDIContentViewer(
 		const WheelFunc& wheelFunc,
-		const WheelAltFunc& wheelAltFunc);
+		const WheelAltFunc& wheelAltFunc,
+		const MouseYPosFunc& mouseYPosFunc,
+		const MouseLeaveFunc& mouseLeaveFunc);
 
 	void update(int index, uint64_t ref);
 	void updateTempoLabel();
@@ -25,12 +29,17 @@ class MIDIContentViewer final
 	void paint(juce::Graphics& g) override;
 	void paintOverChildren(juce::Graphics& g) override;
 
+	void mouseMove(const juce::MouseEvent& event) override;
+	void mouseDrag(const juce::MouseEvent& event) override;
+	void mouseExit(const juce::MouseEvent& event) override;
 	void mouseWheelMove(const juce::MouseEvent& event,
 		const juce::MouseWheelDetails& wheel) override;
 
 private:
 	const WheelFunc wheelFunc;
 	const WheelAltFunc wheelAltFunc;
+	const MouseYPosFunc mouseYPosFunc;
+	const MouseLeaveFunc mouseLeaveFunc;
 
 	/** 0 for white key and 1 for black key */
 	const std::array<int, 12> keyMasks{ 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0 };

src/ui/component/editor/MIDISourceEditor.cpp

@@ -109,6 +109,17 @@ MIDISourceEditor::MIDISourceEditor() {
 			if (comp) {
 				comp->mouseWheelOutsideWithAlt(centerNum, thumbPer, deltaY, reversed);
 			}
+		},
+		[comp = PianoComponent::SafePointer(this->piano.get())]
+		(float posY) {
+			if (comp) {
+				comp->mouseYPosChangedOutside(posY);
+			}
+		},
+		[comp = PianoComponent::SafePointer(this->piano.get())] {
+			if (comp) {
+				comp->mouseLeaveOutside();
+			}
 		});
 	this->addAndMakeVisible(this->content.get());
 

src/ui/component/editor/PianoComponent.cpp

@@ -162,11 +162,8 @@ void PianoComponent::mouseUp(const juce::MouseEvent& event) {
 }
 
 void PianoComponent::mouseMove(const juce::MouseEvent& event) {
-	/** Check Mouse Hovered Key */
-	std::tie(this->keyHovered, std::ignore) = this->findCurrentKey(event.position);
-
-	/** Repaint */
-	this->repaint();
+	this->mouseYPosChangedOutside(
+		event.position.getY(), event.position.getX());
 }
 
 void PianoComponent::mouseDrag(const juce::MouseEvent& event) {
@@ -184,14 +181,12 @@ void PianoComponent::mouseDrag(const juce::MouseEvent& event) {
 }
 
 void PianoComponent::mouseExit(const juce::MouseEvent& event) {
-	this->keyHovered = -1;
-
 	if (this->keyPressed != -1) {
 		this->keyUpDownFunc(this->keyPressed, false, 0);
 		this->keyPressed = -1;
 	}
 
-	this->repaint();
+	this->mouseLeaveOutside();
 }
 
 void PianoComponent::mouseWheelMove(
@@ -208,6 +203,19 @@ void PianoComponent::mouseWheelMove(
 	}
 }
 
+void PianoComponent::mouseYPosChangedOutside(float posY, float posX) {
+	/** Check Mouse Hovered Key */
+	std::tie(this->keyHovered, std::ignore) = this->findCurrentKey(juce::Point{ posX, posY });
+
+	/** Repaint */
+	this->repaint();
+}
+
+void PianoComponent::mouseLeaveOutside() {
+	this->keyHovered = -1;
+	this->repaint();
+}
+
 std::tuple<int, float> PianoComponent::findCurrentKey(const juce::Point<float>& pos) const {
 	float posX = pos.getX(), posY = pos.getY();
 

src/ui/component/editor/PianoComponent.h

@@ -25,6 +25,9 @@ class PianoComponent final : public juce::Component {
 	void mouseWheelMove(const juce::MouseEvent& event,
 		const juce::MouseWheelDetails& wheel) override;
 
+	void mouseYPosChangedOutside(float posY, float posX = 0);
+	void mouseLeaveOutside();
+
 private:
 	const WheelFunc wheelFunc;
 	const WheelAltFunc wheelAltFunc;