Make Slider corners sharp if a child of a Menu.

src/ui/Slider.cpp

@@ -1,4 +1,5 @@
 #include <ui/Slider.hpp>
+#include <ui/Menu.hpp>
 
 
 namespace rack {
@@ -21,7 +22,11 @@ void Slider::draw(const DrawArgs& args) {
 
 	float progress = quantity ? quantity->getScaledValue() : 0.f;
 	std::string text = quantity ? quantity->getString() : "";
-	bndSlider(args.vg, 0.0, 0.0, box.size.x, box.size.y, BND_CORNER_NONE, state, progress, text.c_str(), NULL);
+
+	// If parent is a Menu, make corners sharp
+	ui::Menu* parentMenu = dynamic_cast<ui::Menu*>(getParent());
+	int flags = parentMenu ? BND_CORNER_ALL : BND_CORNER_NONE;
+	bndSlider(args.vg, 0.0, 0.0, box.size.x, box.size.y, flags, state, progress, text.c_str(), NULL);
 }
 
 void Slider::onDragStart(const DragStartEvent& e) {