Add storing and reseting TextureMappingState canvas translation

In SetApplicationStateCmd

src/Application/States/ApplicationBaseState.h

@@ -26,6 +26,10 @@ class ApplicationBaseState {
 	
 		virtual void onGuiEvent(Application * app, GuiEvent & e) = 0;
 	
+		// These are only used by TextureMappingState for now.
+		virtual ofPoint getTranslation(){ return ofPoint(0, 0); }
+		virtual void setTranslation(ofPoint p){}
+
 };
 
 } // namespace piMapper

src/Application/States/TextureMappingState.cpp

@@ -125,5 +125,16 @@ void TextureMappingState::onMouseDragged(Application * app, ofMouseEventArgs & a
 	}
 }
 
+ofPoint TextureMappingState::getTranslation(){
+	cout << "TextureMappingState::getTranslation()" << endl;
+	return _canvasTranslate;
+}
+
+void TextureMappingState::setTranslation(ofPoint p){
+	cout << "TextureMappingState::setTranslation()" << endl;
+	_canvasTranslate = p;
+	_clickCanvasTranslate = p;
+}
+
 } // namespace piMapper
 } // namespace ofx

src/Application/States/TextureMappingState.h

@@ -28,6 +28,9 @@ class TextureMappingState : public ApplicationBaseState {
 	
 		void onGuiEvent(Application * app, GuiEvent & e){}
 	
+		ofPoint getTranslation();
+		void setTranslation(ofPoint p);
+
 	private:
 		static TextureMappingState * _instance;
 	

src/Commands/SetApplicationStateCmd.cpp

@@ -21,6 +21,8 @@ SetApplicationStateCmd::SetApplicationStateCmd(Application * app,
 void SetApplicationStateCmd::exec(){
 	_prevApplicationState = _application->getState();
 	_application->setState(_applicationState);
+	_applicationState->setTranslation(ofPoint(0, 0));
+	_translation = _prevApplicationState->getTranslation();
 
 	// TODO: To be removed.
 	_prevGuiMode = _gui->getMode();
@@ -30,6 +32,7 @@ void SetApplicationStateCmd::exec(){
 void SetApplicationStateCmd::undo(){
 	ofLogNotice("SetApplicationStateCmd", "undo");
 	_application->setState(_prevApplicationState);
+	_application->getState()->setTranslation(_translation);
 
 	// TODO: To be removed.
 	_gui->setMode(_prevGuiMode);

src/Commands/SetApplicationStateCmd.h

@@ -26,6 +26,8 @@ class SetApplicationStateCmd : public BaseUndoCmd {
 		ApplicationBaseState * _prevApplicationState;
 		ApplicationBaseState * _applicationState;
 
+		ofPoint _translation;
+
 		// TODO: Remove these after porting to app state system is done
 		SurfaceManagerGui * _gui;
 		int _prevGuiMode;