Add CableWidget::releaseCable() and ModuleWidget::releaseModule().

include/app/CableWidget.hpp

@@ -37,6 +37,7 @@ struct CableWidget : widget::OpaqueWidget {
 	void fromJson(json_t* rootJ);
 	void draw(const DrawArgs& args) override;
 	void drawPlugs(const DrawArgs& args);
+	engine::Cable* releaseCable();
 };
 
 

include/app/ModuleWidget.hpp

@@ -98,6 +98,7 @@ struct ModuleWidget : widget::OpaqueWidget {
 
 	math::Vec& dragPos();
 	math::Vec& oldPos();
+	engine::Module* releaseModule();
 };
 
 

src/app/CableWidget.cpp

@@ -241,5 +241,12 @@ void CableWidget::drawPlugs(const DrawArgs& args) {
 }
 
 
+engine::Cable* CableWidget::releaseCable() {
+	engine::Cable* cable = this->cable;
+	this->cable = NULL;
+	return cable;
+}
+
+
 } // namespace app
 } // namespace rack

src/app/ModuleWidget.cpp

@@ -980,5 +980,12 @@ math::Vec& ModuleWidget::oldPos() {
 }
 
 
+engine::Module* ModuleWidget::releaseModule() {
+	engine::Module* module = this->module;
+	this->module = NULL;
+	return module;
+}
+
+
 } // namespace app
 } // namespace rack