Update GraphEdit when GraphNode's slot is updated

doc/classes/GraphNode.xml

@@ -260,6 +260,13 @@
 				Emitted when the GraphNode is moved.
 			</description>
 		</signal>
+		<signal name="slot_updated">
+			<argument index="0" name="idx" type="int">
+			</argument>
+			<description>
+				Emitted when any GraphNode's slot is updated.
+			</description>
+		</signal>
 		<signal name="raise_request">
 			<description>
 				Emitted when the GraphNode is requested to be displayed over other ones. Happens on focusing (clicking into) the GraphNode.

scene/gui/graph_edit.cpp

@@ -385,6 +385,15 @@ void GraphEdit::_graph_node_moved(Node *p_gn) {
 	connections_layer->update();
 }
 
+void GraphEdit::_graph_node_slot_updated(int p_index, Node *p_gn) {
+	GraphNode *gn = Object::cast_to<GraphNode>(p_gn);
+	ERR_FAIL_COND(!gn);
+	top_layer->update();
+	minimap->update();
+	update();
+	connections_layer->update();
+}
+
 void GraphEdit::add_child_notify(Node *p_child) {
 	Control::add_child_notify(p_child);
 
@@ -394,6 +403,7 @@ void GraphEdit::add_child_notify(Node *p_child) {
 	if (gn) {
 		gn->set_scale(Vector2(zoom, zoom));
 		gn->connect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_node_moved), varray(gn));
+		gn->connect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated), varray(gn));
 		gn->connect("raise_request", callable_mp(this, &GraphEdit::_graph_node_raised), varray(gn));
 		gn->connect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::update));
 		gn->connect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::update));
@@ -419,6 +429,7 @@ void GraphEdit::remove_child_notify(Node *p_child) {
 	GraphNode *gn = Object::cast_to<GraphNode>(p_child);
 	if (gn) {
 		gn->disconnect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_node_moved));
+		gn->disconnect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated));
 		gn->disconnect("raise_request", callable_mp(this, &GraphEdit::_graph_node_raised));
 
 		// In case of the whole GraphEdit being destroyed these references can already be freed.

scene/gui/graph_edit.h

@@ -167,6 +167,7 @@ private:
 
 	void _graph_node_raised(Node *p_gn);
 	void _graph_node_moved(Node *p_gn);
+	void _graph_node_slot_updated(int p_index, Node *p_gn);
 
 	void _update_scroll();
 	void _scroll_moved(double);

scene/gui/graph_node.cpp

@@ -384,6 +384,8 @@ void GraphNode::set_slot(int p_idx, bool p_enable_left, int p_type_left, const C
 	slot_info[p_idx] = s;
 	update();
 	connpos_dirty = true;
+
+	emit_signal("slot_updated", p_idx);
 }
 
 void GraphNode::clear_slot(int p_idx) {
@@ -838,6 +840,7 @@ void GraphNode::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "overlay", PROPERTY_HINT_ENUM, "Disabled,Breakpoint,Position"), "set_overlay", "get_overlay");
 
 	ADD_SIGNAL(MethodInfo("position_offset_changed"));
+	ADD_SIGNAL(MethodInfo("slot_updated", PropertyInfo(Variant::INT, "idx")));
 	ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::VECTOR2, "from"), PropertyInfo(Variant::VECTOR2, "to")));
 	ADD_SIGNAL(MethodInfo("raise_request"));
 	ADD_SIGNAL(MethodInfo("close_request"));