Handle `backgroundPressedEvent` properly in the `Application`

src/Application/Application.cpp

@@ -18,6 +18,7 @@ Application::Application(){
 	ofAddListener(Gui::instance()->event, this, &Application::onGuiEvent);
 	ofAddListener(Gui::instance()->jointPressedEvent, this, &Application::onJointPressed);
 	ofAddListener(Gui::instance()->surfacePressedEvent, this, &Application::onSurfacePressed);
+	ofAddListener(Gui::instance()->backgroundPressedEvent, this, &Application::onBackgroundPressed);
 }
 
 void Application::setup(){
@@ -131,6 +132,10 @@ void Application::onSurfacePressed(GuiSurfaceEvent & e){
 	_state->onSurfacePressed(this, e);
 }
 
+void Application::onBackgroundPressed(GuiBackgroundEvent & e){
+	_state->onBackgroundPressed(this, e);
+}
+
 void Application::addFboSource(FboSource & fboSource){
 	_mediaServer.addFboSource(fboSource);
 }

src/Application/Application.h

@@ -48,6 +48,7 @@ class Application : public KeyListener {
 		void onGuiEvent(GuiEvent & e);
 		void onJointPressed(GuiJointEvent & e);
 		void onSurfacePressed(GuiSurfaceEvent & e);
+		void onBackgroundPressed(GuiBackgroundEvent & e);
 		// Every state should have it's own GUI layer
 	
 		void addFboSource(FboSource & fboSource);

src/Application/ApplicationBaseState.h

@@ -19,6 +19,7 @@ class ApplicationBaseState {
 		virtual void onKeyPressed(Application * app, ofKeyEventArgs & args){}
 		virtual void onJointPressed(Application * app, GuiJointEvent & e){}
 		virtual void onSurfacePressed(Application * app, GuiSurfaceEvent & e){}
+		virtual void onBackgroundPressed(Application * app, GuiBackgroundEvent & e){}
 
 };
 

src/Application/ProjectionMappingState.cpp

@@ -189,5 +189,9 @@ void ProjectionMappingState::onSurfacePressed(Application * app, GuiSurfaceEvent
 	app->getCmdManager()->exec(new StartDragSurfaceCmd(e.surface));
 }
 
+void ProjectionMappingState::onBackgroundPressed(Application * app, GuiBackgroundEvent & e){
+	app->getCmdManager()->exec(new DeselectSurfaceCmd(app->getSurfaceManager()));
+}
+
 } // namespace piMapper
 } // namespace ofx

src/Application/ProjectionMappingState.h

@@ -19,6 +19,7 @@
 #include "MvSelectionCmd.h"
 #include "StartDragSurfaceCmd.h"
 #include "TogglePerspectiveCmd.h"
+#include "DeselectSurfaceCmd.h"
 #include "SurfaceType.h"
 #include "Gui.h"
 
@@ -33,6 +34,7 @@ class ProjectionMappingState : public ApplicationBaseState {
 		void onKeyPressed(Application * app, ofKeyEventArgs & args);
 		void onJointPressed(Application * app, GuiJointEvent & e);
 		void onSurfacePressed(Application * app, GuiSurfaceEvent & e);
+		void onBackgroundPressed(Application * app, GuiBackgroundEvent & e);
 
 	private:
 		static ProjectionMappingState * _instance;