Fix incorrect drag preview position under transformed CanvasLayer.

zaevi · zaevi · commit 3e30dd79547b · 2024-10-10T03:08:04.000+08:00
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
@@ -1987,7 +1987,8 @@ void Viewport::_gui_input_event(Ref<InputEvent> p_event) {
 
 			Control *drag_preview = _gui_get_drag_preview();
 			if (drag_preview) {
-				drag_preview->set_position(mpos);
+				Vector2 pos = drag_preview->get_canvas_transform().affine_inverse().xform(mpos);
+				drag_preview->set_position(pos);
 			}
 
 			gui.drag_mouse_over = section_root->gui.target_control;

Original file line number	Diff line number	Diff line change
`@@ -1987,7 +1987,8 @@ void Viewport::_gui_input_event(Ref<InputEvent> p_event) {`
`1987`	`1987`
`1988`	`1988`	`Control *drag_preview = _gui_get_drag_preview();`
`1989`	`1989`	`if (drag_preview) {`
`1990`		`- drag_preview->set_position(mpos);`
	`1990`	`+ Vector2 pos = drag_preview->get_canvas_transform().affine_inverse().xform(mpos);`
	`1991`	`+ drag_preview->set_position(pos);`
`1991`	`1992`	`}`
`1992`	`1993`
`1993`	`1994`	`gui.drag_mouse_over = section_root->gui.target_control;`