Remove get_local_mouse_position() hack in GraphEdit

(cherry picked from commit 00457c68bc7e8708e85d6fbd63cba55653f10d46)

scene/gui/graph_edit.cpp

@@ -812,9 +812,7 @@ void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
 	if (mm.is_valid() && dragging) {
 
 		just_selected = true;
-		// TODO: Remove local mouse pos hack if/when InputEventMouseMotion is fixed to support floats
-		//drag_accum+=Vector2(mm->get_relative().x,mm->get_relative().y);
-		drag_accum = get_local_mouse_position() - drag_origin;
+		drag_accum += mm->get_relative();
 		for (int i = get_child_count() - 1; i >= 0; i--) {
 			GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
 			if (gn && gn->is_selected()) {
@@ -834,7 +832,7 @@ void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
 	}
 
 	if (mm.is_valid() && box_selecting) {
-		box_selecting_to = get_local_mouse_position();
+		box_selecting_to = mm->get_position();
 
 		box_selecting_rect = Rect2(MIN(box_selecting_from.x, box_selecting_to.x),
 				MIN(box_selecting_from.y, box_selecting_to.y),
@@ -894,8 +892,9 @@ void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
 					if (gn) {
 						Rect2 r = gn->get_rect();
 						r.size *= zoom;
-						if (r.has_point(get_local_mouse_position()))
+						if (r.has_point(b->get_position())) {
 							gn->set_selected(false);
+						}
 					}
 				}
 			}
@@ -932,7 +931,7 @@ void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
 					if (gn_selected->is_resizing())
 						continue;
 
-					if (gn_selected->has_point(gn_selected->get_local_mouse_position())) {
+					if (gn_selected->has_point(b->get_position() - gn_selected->get_position())) {
 						gn = gn_selected;
 						break;
 					}
@@ -946,7 +945,6 @@ void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
 
 				dragging = true;
 				drag_accum = Vector2();
-				drag_origin = get_local_mouse_position();
 				just_selected = !gn->is_selected();
 				if (!gn->is_selected() && !Input::get_singleton()->is_key_pressed(KEY_CONTROL)) {
 					for (int i = 0; i < get_child_count(); i++) {
@@ -980,7 +978,7 @@ void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
 					return;
 
 				box_selecting = true;
-				box_selecting_from = get_local_mouse_position();
+				box_selecting_from = b->get_position();
 				if (b->get_control()) {
 					box_selection_mode_additive = true;
 					previus_selected.clear();

scene/gui/graph_edit.h

@@ -99,7 +99,6 @@ private:
 	bool dragging;
 	bool just_selected;
 	Vector2 drag_accum;
-	Point2 drag_origin; // Workaround for GH-5907
 
 	float zoom;