Copy cable color when cloning cables with Ctrl+click.

include/app/CableWidget.hpp

@@ -22,6 +22,7 @@ struct CableWidget : widget::OpaqueWidget {
 
 	CableWidget();
 	~CableWidget();
+	void setNextCableColor();
 	bool isComplete();
 	/** Based on the input/output ports, re-creates the cable and removes/adds it to the Engine. */
 	void updateCable();

src/app/CableWidget.cpp

@@ -14,6 +14,13 @@ namespace app {
 
 CableWidget::CableWidget() {
 	color = color::BLACK_TRANSPARENT;
+}
+
+CableWidget::~CableWidget() {
+	setCable(NULL);
+}
+
+void CableWidget::setNextCableColor() {
 	if (!settings::cableColors.empty()) {
 		int id = APP->scene->rack->nextCableColorId++;
 		APP->scene->rack->nextCableColorId %= settings::cableColors.size();
@@ -21,10 +28,6 @@ CableWidget::CableWidget() {
 	}
 }
 
-CableWidget::~CableWidget() {
-	setCable(NULL);
-}
-
 bool CableWidget::isComplete() {
 	return outputPort && inputPort;
 }

src/app/PortWidget.cpp

@@ -193,6 +193,7 @@ void PortWidget::onDragStart(const event::DragStart& e) {
 			CableWidget* topCw = APP->scene->rack->getTopCable(this);
 			if (topCw) {
 				cw = new CableWidget;
+				cw->color = topCw->color;
 				cw->outputPort = topCw->outputPort;
 				cw->updateCable();
 			}
@@ -221,6 +222,7 @@ void PortWidget::onDragStart(const event::DragStart& e) {
 	if (!cw) {
 		// Create a new cable
 		cw = new CableWidget;
+		cw->setNextCableColor();
 		if (type == engine::Port::OUTPUT)
 			cw->outputPort = this;
 		else

src/app/RackWidget.cpp

@@ -279,6 +279,8 @@ void RackWidget::fromJson(json_t* rootJ) {
 			continue;
 
 		CableWidget* cw = new CableWidget;
+		// Legacy: Before v1, cable colors were not serialized. So we need to initialize the color here.
+		cw->setNextCableColor();
 		cw->setCable(cable);
 		cw->fromJson(cableJ);
 		addCable(cw);