Account for upstream links when refreshing combo widgets

src/lib/nodes/widgets/ComfyButtonNode.ts

@@ -0,0 +1,48 @@
+import { BuiltInSlotType, LiteGraph, type SlotLayout } from "@litegraph-ts/core";
+
+import ButtonWidget from "$lib/widgets/ButtonWidget.svelte";
+import ComfyWidgetNode, { type ComfyWidgetProperties } from "./ComfyWidgetNode";
+
+export interface ComfyButtonProperties extends ComfyWidgetProperties {
+    param: string
+}
+
+export default class ComfyButtonNode extends ComfyWidgetNode<boolean> {
+    override properties: ComfyButtonProperties = {
+        tags: [],
+        defaultValue: false,
+        param: "bang"
+    }
+
+    static slotLayout: SlotLayout = {
+        outputs: [
+            { name: "clicked", type: BuiltInSlotType.EVENT },
+        ]
+    }
+
+    override svelteComponentType = ButtonWidget;
+    override defaultValue = false;
+    override outputSlotName = null;
+    override changedEventName = null;
+
+    constructor(name?: string) {
+        super(name, false)
+    }
+
+    override parseValue(param: any): boolean {
+        return Boolean(param);
+    }
+
+    onClick() {
+        this.setValue(true)
+        this.triggerSlot(0, this.properties.param);
+        this.setValue(false) // TODO onRelease
+    }
+}
+
+LiteGraph.registerNodeType({
+    class: ComfyButtonNode,
+    title: "UI.Button",
+    desc: "Button that triggers an event when clicked",
+    type: "ui/button"
+})