Port robust signal (dis)connection to ShapeCast2D

Ported from ShapeCast3D.

(cherry picked from commit 5bed055cdd5180b4c5d07f07a2a58644a3d1ffc2)

2 files changed, 11 insertions, 4 deletions

diff --git a/scene/2d/shape_cast_2d.cpp b/scene/2d/shape_cast_2d.cpp
index bafb83361a..5b743e0b31 100644
--- a/scene/2d/shape_cast_2d.cpp
+++ b/scene/2d/shape_cast_2d.cpp
@@ -151,11 +151,18 @@ bool ShapeCast2D::is_enabled() const {
 }
 
 void ShapeCast2D::set_shape(const Ref<Shape2D> &p_shape) {
+	if (p_shape == shape) {
+		return;
+	}
+	if (shape.is_valid()) {
+		shape->disconnect(CoreStringNames::get_singleton()->changed, callable_mp(this, &ShapeCast2D::_shape_changed));
+	}
 	shape = p_shape;
-	if (p_shape.is_valid()) {
-		shape->connect(CoreStringNames::get_singleton()->changed, callable_mp(this, &ShapeCast2D::_redraw_shape));
+	if (shape.is_valid()) {
+		shape->connect(CoreStringNames::get_singleton()->changed, callable_mp(this, &ShapeCast2D::_shape_changed));
 		shape_rid = shape->get_rid();
 	}
+
 	update_configuration_warnings();
 	queue_redraw();
 }
@@ -186,7 +193,7 @@ bool ShapeCast2D::get_exclude_parent_body() const {
 	return exclude_parent_body;
 }
 
-void ShapeCast2D::_redraw_shape() {
+void ShapeCast2D::_shape_changed() {
 	queue_redraw();
 }
 
diff --git a/scene/2d/shape_cast_2d.h b/scene/2d/shape_cast_2d.h
index 8a62b799f8..a577c351fd 100644
--- a/scene/2d/shape_cast_2d.h
+++ b/scene/2d/shape_cast_2d.h
@@ -61,7 +61,7 @@ class ShapeCast2D : public Node2D {
 	real_t collision_unsafe_fraction = 1.0;
 
 	Array _get_collision_result() const;
-	void _redraw_shape();
+	void _shape_changed();
 
 protected:
 	void _notification(int p_what);