Merge pull request #4249 from bojidar-bg/add-sleep-state-change-signal

Add a `sleeping_state_changed` signal to RigidBody and RigidBody2D

scene/2d/physics_body_2d.cpp

@@ -544,7 +544,10 @@ void RigidBody2D::_direct_state_changed(Object *p_state) {
 		set_global_transform(state->get_transform());
 	linear_velocity=state->get_linear_velocity();
 	angular_velocity=state->get_angular_velocity();
-	sleeping=state->is_sleeping();
+	if(sleeping!=state->is_sleeping()) {
+		sleeping=state->is_sleeping();
+		emit_signal(SceneStringNames::get_singleton()->sleeping_state_changed);
+	}
 	if (get_script_instance())
 		get_script_instance()->call("_integrate_forces",state);
 	set_block_transform_notify(false); // want it back
@@ -934,6 +937,7 @@ void RigidBody2D::_bind_methods() {
 	ADD_SIGNAL( MethodInfo("body_exit_shape",PropertyInfo(Variant::INT,"body_id"),PropertyInfo(Variant::OBJECT,"body"),PropertyInfo(Variant::INT,"body_shape"),PropertyInfo(Variant::INT,"local_shape")));
 	ADD_SIGNAL( MethodInfo("body_enter",PropertyInfo(Variant::OBJECT,"body")));
 	ADD_SIGNAL( MethodInfo("body_exit",PropertyInfo(Variant::OBJECT,"body")));
+	ADD_SIGNAL( MethodInfo("sleeping_state_changed"));
 
 	BIND_CONSTANT( MODE_STATIC );
 	BIND_CONSTANT( MODE_KINEMATIC );

scene/3d/physics_body.cpp

@@ -419,7 +419,10 @@ void RigidBody::_direct_state_changed(Object *p_state) {
 	set_global_transform(state->get_transform());
 	linear_velocity=state->get_linear_velocity();
 	angular_velocity=state->get_angular_velocity();
-	sleeping=state->is_sleeping();
+	if(sleeping!=state->is_sleeping()) {
+		sleeping=state->is_sleeping();
+		emit_signal(SceneStringNames::get_singleton()->sleeping_state_changed);
+	}
 	if (get_script_instance())
 		get_script_instance()->call("_integrate_forces",state);
 	set_ignore_transform_notification(false);
@@ -811,6 +814,7 @@ void RigidBody::_bind_methods() {
 	ADD_SIGNAL( MethodInfo("body_exit_shape",PropertyInfo(Variant::INT,"body_id"),PropertyInfo(Variant::OBJECT,"body"),PropertyInfo(Variant::INT,"body_shape"),PropertyInfo(Variant::INT,"local_shape")));
 	ADD_SIGNAL( MethodInfo("body_enter",PropertyInfo(Variant::OBJECT,"body")));
 	ADD_SIGNAL( MethodInfo("body_exit",PropertyInfo(Variant::OBJECT,"body")));
+	ADD_SIGNAL( MethodInfo("sleeping_state_changed"));
 
 	BIND_CONSTANT( MODE_STATIC );
 	BIND_CONSTANT( MODE_KINEMATIC );

scene/scene_string_names.cpp

@@ -48,6 +48,7 @@ SceneStringNames::SceneStringNames() {
 	item_rect_changed=StaticCString::create("item_rect_changed");
 	size_flags_changed=StaticCString::create("size_flags_changed");
 	minimum_size_changed=StaticCString::create("minimum_size_changed");
+	sleeping_state_changed=StaticCString::create("sleeping_state_changed");
 
 	finished=StaticCString::create("finished");
 	animation_changed=StaticCString::create("animation_changed");

scene/scene_string_names.h

@@ -62,6 +62,7 @@ public:
 	StringName exit_tree;
 	StringName size_flags_changed;
 	StringName minimum_size_changed;
+	StringName sleeping_state_changed;
 	StringName idle;
 	StringName iteration;
 	StringName update;