Move get display index to C++

lime/_backend/native/NativeWindow.hx

@@ -128,17 +128,13 @@ class NativeWindow {
 	
 	public function getDisplay ():Display {
 		
-		var center = new Vector2 (parent.__x + (parent.__width / 2), parent.__y + (parent.__height / 2));
+		if (handle != null) {
-		var numDisplays = System.numDisplays;
-		var display;
 			
-		for (i in 0...numDisplays) {
+			var index = lime_window_get_display (handle);
 			
-			display = System.getDisplay (i);
+			if (index > -1) {
 				
-			if (display.bounds.containsPoint (center)) {
+				return System.getDisplay (index);
-				
-				return display;
 				
 			}
 			
@@ -307,6 +303,7 @@ class NativeWindow {
 	@:cffi private static function lime_window_close (handle:Dynamic):Void;
 	@:cffi private static function lime_window_create (application:Dynamic, width:Int, height:Int, flags:Int, title:String):Dynamic;
 	@:cffi private static function lime_window_focus (handle:Dynamic):Void;
+	@:cffi private static function lime_window_get_display (handle:Dynamic):Int;
 	@:cffi private static function lime_window_get_enable_text_events (handle:Dynamic):Bool;
 	@:cffi private static function lime_window_get_height (handle:Dynamic):Int;
 	@:cffi private static function lime_window_get_id (handle:Dynamic):Int;

project/include/ui/Window.h

@@ -22,6 +22,7 @@ namespace lime {
 			virtual void Alert (const char* message, const char* title) = 0;
 			virtual void Close () = 0;
 			virtual void Focus () = 0;
+			virtual int GetDisplay () = 0;
 			virtual bool GetEnableTextEvents () = 0;
 			virtual int GetHeight () = 0;
 			virtual uint32_t GetID () = 0;

project/src/ExternalInterface.cpp

@@ -1300,6 +1300,14 @@ namespace lime {
 	}
 	
 	
+	int lime_window_get_display (value window) {
+		
+		Window* targetWindow = (Window*)val_data (window);
+		return targetWindow->GetDisplay ();
+		
+	}
+	
+	
 	bool lime_window_get_enable_text_events (value window) {
 		
 		Window* targetWindow = (Window*)val_data (window);
@@ -1527,6 +1535,7 @@ namespace lime {
 	DEFINE_PRIME5 (lime_window_create);
 	DEFINE_PRIME2v (lime_window_event_manager_register);
 	DEFINE_PRIME1v (lime_window_focus);
+	DEFINE_PRIME1 (lime_window_get_display);
 	DEFINE_PRIME1 (lime_window_get_enable_text_events);
 	DEFINE_PRIME1 (lime_window_get_height);
 	DEFINE_PRIME1 (lime_window_get_id);

project/src/backend/sdl/SDLWindow.cpp

@@ -179,6 +179,13 @@ namespace lime {
 	}
 	
 	
+	int SDLWindow::GetDisplay () {
+		
+		return SDL_GetWindowDisplayIndex (sdlWindow);
+		
+	}
+	
+	
 	bool SDLWindow::GetEnableTextEvents () {
 		
 		return SDL_IsTextInputActive ();

project/src/backend/sdl/SDLWindow.h

@@ -20,6 +20,7 @@ namespace lime {
 			virtual void Alert (const char* message, const char* title);
 			virtual void Close ();
 			virtual void Focus ();
+			virtual int GetDisplay ();
 			virtual bool GetEnableTextEvents ();
 			virtual int GetHeight ();
 			virtual uint32_t GetID ();