Add close event

src/PowderToySDL.cpp

@@ -304,6 +304,7 @@ void EventProcess(SDL_Event event)
 	switch (event.type)
 	{
 	case SDL_QUIT:
+		engine->onClose();
 		if (engine->GetFastQuit() || engine->CloseWindow())
 			engine->Exit();
 		break;

src/gui/game/GameController.cpp

@@ -865,6 +865,8 @@ void GameController::Tick()
 
 void GameController::Exit()
 {
+	CloseEvent ev;
+	commandInterface->HandleEvent(LuaEvents::close, &ev);
 	gameView->CloseActiveWindow();
 	HasDone = true;
 }

src/gui/game/GameView.cpp

@@ -1855,6 +1855,12 @@ void GameView::DoKeyRelease(int key, int scan, bool repeat, bool shift, bool ctr
 		Window::DoKeyRelease(key, scan, repeat, shift, ctrl, alt);
 }
 
+void GameView::DoExit()
+{
+	Window::DoExit();
+	c->Exit();
+}
+
 void GameView::DoDraw()
 {
 	Window::DoDraw();

src/gui/game/GameView.h

@@ -198,6 +198,7 @@ class GameView: public ui::Window
 	virtual void OnBlur();
 
 	//Top-level handlers, for Lua interface
+	virtual void DoExit();
 	virtual void DoDraw();
 	virtual void DoMouseMove(int x, int y, int dx, int dy);
 	virtual void DoMouseDown(int x, int y, unsigned button);

src/lua/LuaEvents.h

@@ -98,6 +98,12 @@ class TickEvent: public Event
 	int PushToStack(lua_State *l) override { return 0; }
 };
 
+class CloseEvent: public Event
+{
+public:
+	int PushToStack(lua_State *l) override { return 0; }
+};
+
 class LuaEvents
 {
 public:
@@ -109,7 +115,8 @@ class LuaEvents
 		mouseup,
 		mousemove,
 		mousewheel,
-		tick
+		tick,
+		close
 	};
 
 	static int RegisterEventHook(lua_State* l, ByteString eventName);

src/lua/LuaScriptInterface.cpp

@@ -3311,6 +3311,7 @@ void LuaScriptInterface::initEventAPI()
 	lua_pushinteger(l, LuaEvents::mousemove); lua_setfield(l, -2, "mousemove");
 	lua_pushinteger(l, LuaEvents::mousewheel); lua_setfield(l, -2, "mousewheel");
 	lua_pushinteger(l, LuaEvents::tick); lua_setfield(l, -2, "tick");
+	lua_pushinteger(l, LuaEvents::close); lua_setfield(l, -2, "close");
 }
 
 int LuaScriptInterface::event_register(lua_State * l)