Transform drawLayer() in ZoomWidget and TransformWidget.

include/widget/TransformWidget.hpp

@@ -48,6 +48,12 @@ struct TransformWidget : Widget {
 		nvgTransform(args.vg, transform[0], transform[1], transform[2], transform[3], transform[4], transform[5]);
 		Widget::draw(args);
 	}
+
+	void drawLayer(const DrawArgs& args, int layer) override {
+		// No need to save the state because that is done in the parent
+		nvgTransform(args.vg, transform[0], transform[1], transform[2], transform[3], transform[4], transform[5]);
+		Widget::drawLayer(args, layer);
+	}
 };
 
 

include/widget/ZoomWidget.hpp

@@ -18,6 +18,7 @@ struct ZoomWidget : Widget {
 		return zoom;
 	}
 	void draw(const DrawArgs& args) override;
+	void drawLayer(const DrawArgs& args, int layer) override;
 
 	void onHover(const HoverEvent& e) override {
 		HoverEvent e2 = e;

src/widget/ZoomWidget.cpp

@@ -50,5 +50,15 @@ void ZoomWidget::draw(const DrawArgs& args) {
 }
 
 
+void ZoomWidget::drawLayer(const DrawArgs& args, int layer) {
+	DrawArgs zoomCtx = args;
+	zoomCtx.clipBox.pos = zoomCtx.clipBox.pos.div(zoom);
+	zoomCtx.clipBox.size = zoomCtx.clipBox.size.div(zoom);
+	// No need to save the state because that is done in the parent
+	nvgScale(args.vg, zoom, zoom);
+	Widget::drawLayer(zoomCtx, layer);
+}
+
+
 } // namespace widget
 } // namespace rack