1 files changed, 38 insertions, 2 deletions

diff --git a/scene/main/window.cpp b/scene/main/window.cpp
index d3fcf29927..c5dbfffd7b 100644
--- a/scene/main/window.cpp
+++ b/scene/main/window.cpp
@@ -223,6 +223,14 @@ void Window::_get_property_list(List<PropertyInfo> *p_list) const {
 }
 
 void Window::_validate_property(PropertyInfo &p_property) const {
+	if (p_property.name == "position" && initial_position != WINDOW_INITIAL_POSITION_ABSOLUTE) {
+		p_property.usage = PROPERTY_USAGE_NONE;
+	}
+
+	if (p_property.name == "current_screen" && initial_position != WINDOW_INITIAL_POSITION_CENTER_SCREEN) {
+		p_property.usage = PROPERTY_USAGE_NONE;
+	}
+
 	if (p_property.name == "theme_type_variation") {
 		List<StringName> names;
 
@@ -275,6 +283,15 @@ String Window::get_title() const {
 	return title;
 }
 
+void Window::set_initial_position(Window::WindowInitialPosition p_initial_position) {
+	initial_position = p_initial_position;
+	notify_property_list_changed();
+}
+
+Window::WindowInitialPosition Window::get_initial_position() const {
+	return initial_position;
+}
+
 void Window::set_current_screen(int p_screen) {
 	current_screen = p_screen;
 	if (window_id == DisplayServer::INVALID_WINDOW_ID) {
@@ -462,7 +479,13 @@ void Window::_make_window() {
 	}
 
 	DisplayServer::VSyncMode vsync_mode = DisplayServer::get_singleton()->window_get_vsync_mode(DisplayServer::MAIN_WINDOW_ID);
-	window_id = DisplayServer::get_singleton()->create_sub_window(DisplayServer::WindowMode(mode), vsync_mode, f, Rect2i(position, size), current_screen);
+	Rect2i window_rect;
+	if (initial_position == WINDOW_INITIAL_POSITION_ABSOLUTE) {
+		window_rect = Rect2i(position, size);
+	} else if (initial_position == WINDOW_INITIAL_POSITION_CENTER_SCREEN) {
+		window_rect = Rect2i(DisplayServer::get_singleton()->screen_get_position(current_screen) + (DisplayServer::get_singleton()->screen_get_size(current_screen) - size) / 2, size);
+	}
+	window_id = DisplayServer::get_singleton()->create_sub_window(DisplayServer::WindowMode(mode), vsync_mode, f, window_rect);
 	ERR_FAIL_COND(window_id == DisplayServer::INVALID_WINDOW_ID);
 	DisplayServer::get_singleton()->window_set_max_size(Size2i(), window_id);
 	DisplayServer::get_singleton()->window_set_min_size(Size2i(), window_id);
@@ -2068,6 +2091,9 @@ void Window::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_title", "title"), &Window::set_title);
 	ClassDB::bind_method(D_METHOD("get_title"), &Window::get_title);
 
+	ClassDB::bind_method(D_METHOD("set_initial_position", "initial_position"), &Window::set_initial_position);
+	ClassDB::bind_method(D_METHOD("get_initial_position"), &Window::get_initial_position);
+
 	ClassDB::bind_method(D_METHOD("set_current_screen", "index"), &Window::set_current_screen);
 	ClassDB::bind_method(D_METHOD("get_current_screen"), &Window::get_current_screen);
 
@@ -2204,11 +2230,18 @@ void Window::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("popup_centered", "minsize"), &Window::popup_centered, DEFVAL(Size2i()));
 	ClassDB::bind_method(D_METHOD("popup_centered_clamped", "minsize", "fallback_ratio"), &Window::popup_centered_clamped, DEFVAL(Size2i()), DEFVAL(0.75));
 
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "initial_position", PROPERTY_HINT_ENUM, "Absolute,Screen Center"), "set_initial_position", "get_initial_position");
 	ADD_PROPERTY(PropertyInfo(Variant::STRING, "title"), "set_title", "get_title");
 	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2I, "position", PROPERTY_HINT_NONE, "suffix:px"), "set_position", "get_position");
 	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2I, "size", PROPERTY_HINT_NONE, "suffix:px"), "set_size", "get_size");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "mode", PROPERTY_HINT_ENUM, "Windowed,Minimized,Maximized,Fullscreen"), "set_mode", "get_mode");
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "current_screen"), "set_current_screen", "get_current_screen");
+
+	// Keep the enum values in sync with the `DisplayServer::SCREEN_` enum.
+	String screen_hints = "Primary Monitor:-2,Main Window Monitor:-1";
+	for (int i = 0; i < 64; i++) {
+		screen_hints += ",Monitor " + itos(i + 1) + ":" + itos(i);
+	}
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "current_screen", PROPERTY_HINT_ENUM, screen_hints), "set_current_screen", "get_current_screen");
 
 	ADD_GROUP("Flags", "");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "visible"), "set_visible", "is_visible");
@@ -2285,6 +2318,9 @@ void Window::_bind_methods() {
 	BIND_ENUM_CONSTANT(LAYOUT_DIRECTION_LOCALE);
 	BIND_ENUM_CONSTANT(LAYOUT_DIRECTION_LTR);
 	BIND_ENUM_CONSTANT(LAYOUT_DIRECTION_RTL);
+
+	BIND_ENUM_CONSTANT(WINDOW_INITIAL_POSITION_ABSOLUTE);
+	BIND_ENUM_CONSTANT(WINDOW_INITIAL_POSITION_CENTER_SCREEN);
 }
 
 Window::Window() {