adds display of old bounding box as suggested by Zephilinox in issue #10936

2 files changed, 24 insertions, 0 deletions

diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index ad01d0a31e..b28da54c6d 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -845,6 +845,8 @@ void CanvasItemEditor::_prepare_drag(const Point2 &p_click_pos) {
 			se->undo_pivot = Object::cast_to<Node2D>(canvas_item)->edit_get_pivot();
 		if (Object::cast_to<Control>(canvas_item))
 			se->undo_pivot = Object::cast_to<Control>(canvas_item)->get_pivot_offset();
+
+		se->pre_drag_xform = canvas_item->get_global_transform_with_canvas();
 	}
 
 	if (selection.size() == 1 && Object::cast_to<Node2D>(selection[0])) {
@@ -1411,6 +1413,7 @@ void CanvasItemEditor::_viewport_gui_input(const Ref<InputEvent> &p_event) {
 					se->undo_pivot = Object::cast_to<Node2D>(canvas_item)->edit_get_pivot();
 				if (Object::cast_to<Control>(canvas_item))
 					se->undo_pivot = Object::cast_to<Control>(canvas_item)->get_pivot_offset();
+				se->pre_drag_xform = canvas_item->get_global_transform_with_canvas();
 				return;
 			}
 
@@ -1432,6 +1435,7 @@ void CanvasItemEditor::_viewport_gui_input(const Ref<InputEvent> &p_event) {
 						se->undo_pivot = Object::cast_to<Node2D>(canvas_item)->edit_get_pivot();
 					if (Object::cast_to<Control>(canvas_item))
 						se->undo_pivot = Object::cast_to<Control>(canvas_item)->get_pivot_offset();
+					se->pre_drag_xform = canvas_item->get_global_transform_with_canvas();
 					return;
 				}
 
@@ -1441,6 +1445,7 @@ void CanvasItemEditor::_viewport_gui_input(const Ref<InputEvent> &p_event) {
 					if (drag != DRAG_NONE) {
 						drag_from = transform.affine_inverse().xform(click);
 						se->undo_state = canvas_item->edit_get_state();
+						se->pre_drag_xform = canvas_item->get_global_transform_with_canvas();
 						return;
 					}
 				}
@@ -1993,6 +1998,23 @@ void CanvasItemEditor::_viewport_draw() {
 
 		Rect2 rect = canvas_item->get_item_rect();
 
+		if (drag != DRAG_NONE && drag != DRAG_PIVOT) {
+			const Transform2D pre_drag_xform = transform * se->pre_drag_xform;
+			const Color pre_drag_color = Color(0.4, 0.6, 1, 0.7);
+
+			Vector2 pre_drag_endpoints[4] = {
+
+				pre_drag_xform.xform(rect.position),
+				pre_drag_xform.xform(rect.position + Vector2(rect.size.x, 0)),
+				pre_drag_xform.xform(rect.position + rect.size),
+				pre_drag_xform.xform(rect.position + Vector2(0, rect.size.y))
+			};
+
+			for (int i = 0; i < 4; i++) {
+				viewport->draw_line(pre_drag_endpoints[i], pre_drag_endpoints[(i + 1) % 4], pre_drag_color, 2);
+			}
+		}
+
 		Transform2D xform = transform * canvas_item->get_global_transform_with_canvas();
 		VisualServer::get_singleton()->canvas_item_add_set_transform(ci, xform);
 
diff --git a/editor/plugins/canvas_item_editor_plugin.h b/editor/plugins/canvas_item_editor_plugin.h
index 2e1a2eac5f..e81988668b 100644
--- a/editor/plugins/canvas_item_editor_plugin.h
+++ b/editor/plugins/canvas_item_editor_plugin.h
@@ -58,6 +58,8 @@ public:
 	Vector2 prev_pivot;
 	float prev_anchors[4];
 
+	Transform2D pre_drag_xform;
+
 	CanvasItemEditorSelectedItem() { prev_rot = 0; }
 };