Improve appearance of translucent or transparent cable colors.

src/app/CableWidget.cpp

@@ -229,10 +229,13 @@ void CableWidget::mergeJson(json_t* rootJ) {
 
 void CableWidget::fromJson(json_t* rootJ) {
 	json_t* colorJ = json_object_get(rootJ, "color");
-	if (colorJ) {
+	if (colorJ && json_is_string(colorJ)) {
+		color = color::fromHexString(json_string_value(colorJ));
+	}
+	else {
 		// In <v0.6.0, cables used JSON objects instead of hex strings. Just ignore them if so and use the existing cable color.
-		if (json_is_string(colorJ))
-			color = color::fromHexString(json_string_value(colorJ));
+		// In <=v1, cable colors were not serialized.
+		color = APP->scene->rack->getNextCableColor();
 	}
 }
 
@@ -251,12 +254,15 @@ void CableWidget::step() {
 	math::Vec inputPos = getInputPos();
 	math::Vec slump = getSlumpPos(outputPos, inputPos);
 
+	NVGcolor colorOpaque = color;
+	colorOpaque.a = 1.f;
+
 	// Draw output plug
 	bool outputTop = !isComplete() || APP->scene->rack->getTopCable(outputPort) == this;
 	outputPlug->setPosition(outputPos);
 	outputPlug->setTop(outputTop);
 	outputPlug->setAngle(slump.minus(outputPos).arg());
-	outputPlug->setColor(color);
+	outputPlug->setColor(colorOpaque);
 	outputPlug->setPortWidget(outputPort);
 
 	// Draw input plug
@@ -264,7 +270,7 @@ void CableWidget::step() {
 	inputPlug->setPosition(inputPos);
 	inputPlug->setTop(inputTop);
 	inputPlug->setAngle(slump.minus(inputPos).arg());
-	inputPlug->setColor(color);
+	inputPlug->setColor(colorOpaque);
 	inputPlug->setPortWidget(inputPort);
 
 	Widget::step();

src/app/PortWidget.cpp

@@ -444,7 +444,7 @@ void PortWidget::onDragStart(const DragStartEvent& e) {
 		cw = new CableWidget;
 
 		// Set color
-		if (internal->overrideColor.a > 0.f)
+		if (internal->overrideCreateCable)
 			cw->color = internal->overrideColor;
 		else
 			cw->color = APP->scene->rack->getNextCableColor();

src/app/RackWidget.cpp

@@ -377,10 +377,6 @@ void RackWidget::fromJson(json_t* rootJ) {
 		try {
 			cw->setCable(cable);
 			cw->fromJson(cableJ);
-			// In <=v1, cable colors were not serialized, so choose one from the available colors.
-			if (cw->color.a == 0.f) {
-				cw->color = getNextCableColor();
-			}
 		}
 		catch (Exception& e) {
 			delete cw;