Refresh TextureRegionEditor when region has been changed externally.

Now the TextureRegionEditor updates when you change the region_rect either via the inspector or via
undo/redo.

Fixes #6772

(cherry picked from commit 094073e4b22344c4b969d55850c7927e569bfd43)

2 files changed, 9 insertions, 0 deletions

diff --git a/tools/editor/plugins/texture_region_editor_plugin.cpp b/tools/editor/plugins/texture_region_editor_plugin.cpp
index 43086fb20..6b918e6e8 100644
--- a/tools/editor/plugins/texture_region_editor_plugin.cpp
+++ b/tools/editor/plugins/texture_region_editor_plugin.cpp
@@ -653,6 +653,7 @@ void TextureRegionEditor::edit(Object *p_obj)
 		} else {
 			p_obj->connect("texture_changed",this,"_edit_region");
 		}
+		p_obj->add_change_receptor(this);
 		p_obj->connect("exit_tree",this,"_node_removed",varray(p_obj),CONNECT_ONESHOT);
 		_edit_region();
 	} else {
@@ -673,6 +674,12 @@ void TextureRegionEditor::edit(Object *p_obj)
 	edit_draw->update();
 }
 
+void TextureRegionEditor::_changed_callback(Object *p_changed, const char *p_prop) {
+	if ((String)p_prop == "region_rect") {
+		_edit_region();
+	}
+}
+
 void TextureRegionEditor::_edit_region()
 {
 	Ref<Texture> texture = NULL;
diff --git a/tools/editor/plugins/texture_region_editor_plugin.h b/tools/editor/plugins/texture_region_editor_plugin.h
index 3658a38f1..f0bb7c9bc 100644
--- a/tools/editor/plugins/texture_region_editor_plugin.h
+++ b/tools/editor/plugins/texture_region_editor_plugin.h
@@ -116,6 +116,8 @@ protected:
 
 	Vector2 snap_point(Vector2 p_target) const;
 
+	virtual void _changed_callback(Object *p_changed, const char *p_prop);
+
 public:
 
 	void _edit_region();