feat: add reset-to-default for widget parameters in right side panel (#8861)

## Summary

Add per-widget and reset-all-parameters functionality to the right side
panel, allowing users to quickly revert widget values to their defaults.

## Changes

- **What**: Per-widget "Reset to default" option in the WidgetActions
overflow menu, plus a "Reset all parameters" button in each
SectionWidgets header. Defaults are derived from the InputSpec (explicit
default, then type-specific fallbacks: 0 for INT/FLOAT, false for
BOOLEAN, empty string for STRING, first option for COMBO).
- **Dependencies**: Builds on #8594 (WidgetValueStore) for reactive UI
updates after reset.

## Review Focus

- `getWidgetDefaultValue` fallback logic in `src/utils/widgetUtil.ts` —
are the type-specific defaults appropriate?
- Deep equality check (`isEqual`) for disabling the reset button when
the value already matches the default.
- Event flow: WidgetActions emits `resetToDefault` → WidgetItem forwards
→ SectionWidgets handles via `writeWidgetValue` (sets value, triggers
callback, marks canvas dirty).

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8861-feat-add-reset-to-default-for-widget-parameters-in-right-side-panel-3076d73d365081d1aa08d5b965a16cf4)
by [Unito](https://www.unito.io)

Co-authored-by: Terry Jia <terryjia88@gmail.com>

Author: christian-byrne

src/components/rightSidePanel/parameters/SectionWidgets.vue

@@ -12,6 +12,9 @@ import type {
 } from '@/lib/litegraph/src/litegraph'
 import type { IBaseWidget } from '@/lib/litegraph/src/types/widgets'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import { useNodeDefStore } from '@/stores/nodeDefStore'
+import { getWidgetDefaultValue } from '@/utils/widgetUtil'
+import type { WidgetValue } from '@/utils/widgetUtil'
 
 import PropertiesAccordionItem from '../layout/PropertiesAccordionItem.vue'
 import { HideLayoutFieldKey } from '@/types/widgetTypes'
@@ -57,6 +60,7 @@ watchEffect(() => (widgets.value = widgetsProp))
 provide(HideLayoutFieldKey, true)
 
 const canvasStore = useCanvasStore()
+const nodeDefStore = useNodeDefStore()
 const { t } = useI18n()
 
 const getNodeParentGroup = inject(GetNodeParentGroupKey, null)
@@ -118,15 +122,31 @@ function handleLocateNode() {
   }
 }
 
-function handleWidgetValueUpdate(
-  widget: IBaseWidget,
-  newValue: string | number | boolean | object
-) {
-  widget.value = newValue
-  widget.callback?.(newValue)
+function writeWidgetValue(widget: IBaseWidget, value: WidgetValue) {
+  widget.value = value
+  widget.callback?.(value)
   canvasStore.canvas?.setDirty(true, true)
 }
 
+function handleResetAllWidgets() {
+  for (const { widget, node: widgetNode } of widgetsProp) {
+    const spec = nodeDefStore.getInputSpecForWidget(widgetNode, widget.name)
+    const defaultValue = getWidgetDefaultValue(spec)
+    if (defaultValue !== undefined) {
+      writeWidgetValue(widget, defaultValue)
+    }
+  }
+}
+
+function handleWidgetValueUpdate(widget: IBaseWidget, newValue: WidgetValue) {
+  if (newValue === undefined) return
+  writeWidgetValue(widget, newValue)
+}
+
+function handleWidgetReset(widget: IBaseWidget, newValue: WidgetValue) {
+  writeWidgetValue(widget, newValue)
+}
+
 defineExpose({
   widgetsContainer,
   rootElement
@@ -157,6 +177,17 @@ defineExpose({
               {{ parentGroup.title }}
             </span>
           </span>
+          <Button
+            v-if="!isEmpty"
+            variant="textonly"
+            size="icon-sm"
+            class="subbutton shrink-0 size-8 cursor-pointer text-muted-foreground hover:text-base-foreground"
+            :title="t('rightSidePanel.resetAllParameters')"
+            :aria-label="t('rightSidePanel.resetAllParameters')"
+            @click.stop="handleResetAllWidgets"
+          >
+            <i class="icon-[lucide--rotate-ccw] size-4" />
+          </Button>
           <Button
             v-if="canShowLocateButton"
             variant="textonly"
@@ -189,6 +220,7 @@ defineExpose({
             :parents="parents"
             :is-shown-on-parents="isWidgetShownOnParents(node, widget)"
             @update:widget-value="handleWidgetValueUpdate(widget, $event)"
+            @reset-to-default="handleWidgetReset(widget, $event)"
           />
         </TransitionGroup>
       </div>

src/components/rightSidePanel/parameters/WidgetActions.test.ts

@@ -0,0 +1,209 @@
+import { createTestingPinia } from '@pinia/testing'
+import { mount } from '@vue/test-utils'
+import { setActivePinia } from 'pinia'
+import type { Slots } from 'vue'
+import { h } from 'vue'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { createI18n } from 'vue-i18n'
+
+import type { LGraphNode } from '@/lib/litegraph/src/litegraph'
+import type { IBaseWidget } from '@/lib/litegraph/src/types/widgets'
+
+import WidgetActions from './WidgetActions.vue'
+
+const { mockGetInputSpecForWidget } = vi.hoisted(() => ({
+  mockGetInputSpecForWidget: vi.fn()
+}))
+
+vi.mock('@/stores/nodeDefStore', () => ({
+  useNodeDefStore: () => ({
+    getInputSpecForWidget: mockGetInputSpecForWidget
+  })
+}))
+
+vi.mock('@/renderer/core/canvas/canvasStore', () => ({
+  useCanvasStore: () => ({
+    canvas: { setDirty: vi.fn() }
+  })
+}))
+
+vi.mock('@/stores/workspace/favoritedWidgetsStore', () => ({
+  useFavoritedWidgetsStore: () => ({
+    isFavorited: vi.fn().mockReturnValue(false),
+    toggleFavorite: vi.fn()
+  })
+}))
+
+vi.mock('@/services/dialogService', () => ({
+  useDialogService: () => ({
+    prompt: vi.fn()
+  })
+}))
+
+vi.mock('@/components/button/MoreButton.vue', () => ({
+  default: (_: unknown, { slots }: { slots: Slots }) =>
+    h('div', slots.default?.({ close: () => {} }))
+}))
+
+const i18n = createI18n({
+  legacy: false,
+  locale: 'en',
+  messages: {
+    en: {
+      g: {
+        rename: 'Rename',
+        enterNewName: 'Enter new name'
+      },
+      rightSidePanel: {
+        hideInput: 'Hide input',
+        showInput: 'Show input',
+        addFavorite: 'Favorite',
+        removeFavorite: 'Unfavorite',
+        resetToDefault: 'Reset to default'
+      }
+    }
+  }
+})
+
+describe('WidgetActions', () => {
+  beforeEach(() => {
+    setActivePinia(createTestingPinia({ stubActions: false }))
+    vi.resetAllMocks()
+    mockGetInputSpecForWidget.mockReturnValue({
+      type: 'INT',
+      default: 42
+    })
+  })
+
+  function createMockWidget(
+    value: number = 100,
+    callback?: () => void
+  ): IBaseWidget {
+    return {
+      name: 'test_widget',
+      type: 'number',
+      value,
+      label: 'Test Widget',
+      options: {},
+      y: 0,
+      callback
+    } as IBaseWidget
+  }
+
+  function createMockNode(): LGraphNode {
+    return {
+      id: 1,
+      type: 'TestNode'
+    } as LGraphNode
+  }
+
+  function mountWidgetActions(widget: IBaseWidget, node: LGraphNode) {
+    return mount(WidgetActions, {
+      props: {
+        widget,
+        node,
+        label: 'Test Widget'
+      },
+      global: {
+        plugins: [i18n]
+      }
+    })
+  }
+
+  it('shows reset button when widget has default value', () => {
+    const widget = createMockWidget()
+    const node = createMockNode()
+
+    const wrapper = mountWidgetActions(widget, node)
+
+    const resetButton = wrapper
+      .findAll('button')
+      .find((b) => b.text().includes('Reset'))
+    expect(resetButton).toBeDefined()
+  })
+
+  it('emits resetToDefault with default value when reset button clicked', async () => {
+    const widget = createMockWidget(100)
+    const node = createMockNode()
+
+    const wrapper = mountWidgetActions(widget, node)
+
+    const resetButton = wrapper
+      .findAll('button')
+      .find((b) => b.text().includes('Reset'))
+
+    await resetButton?.trigger('click')
+
+    expect(wrapper.emitted('resetToDefault')).toHaveLength(1)
+    expect(wrapper.emitted('resetToDefault')![0]).toEqual([42])
+  })
+
+  it('disables reset button when value equals default', () => {
+    const widget = createMockWidget(42)
+    const node = createMockNode()
+
+    const wrapper = mountWidgetActions(widget, node)
+
+    const resetButton = wrapper
+      .findAll('button')
+      .find((b) => b.text().includes('Reset'))
+
+    expect(resetButton?.attributes('disabled')).toBeDefined()
+  })
+
+  it('does not show reset button when no default value exists', () => {
+    mockGetInputSpecForWidget.mockReturnValue({
+      type: 'CUSTOM'
+    })
+
+    const widget = createMockWidget(100)
+    const node = createMockNode()
+
+    const wrapper = mountWidgetActions(widget, node)
+
+    const resetButton = wrapper
+      .findAll('button')
+      .find((b) => b.text().includes('Reset'))
+
+    expect(resetButton).toBeUndefined()
+  })
+
+  it('uses fallback default for INT type without explicit default', async () => {
+    mockGetInputSpecForWidget.mockReturnValue({
+      type: 'INT'
+    })
+
+    const widget = createMockWidget(100)
+    const node = createMockNode()
+
+    const wrapper = mountWidgetActions(widget, node)
+
+    const resetButton = wrapper
+      .findAll('button')
+      .find((b) => b.text().includes('Reset'))
+
+    await resetButton?.trigger('click')
+
+    expect(wrapper.emitted('resetToDefault')![0]).toEqual([0])
+  })
+
+  it('uses first option as default for combo without explicit default', async () => {
+    mockGetInputSpecForWidget.mockReturnValue({
+      type: 'COMBO',
+      options: ['option1', 'option2', 'option3']
+    })
+
+    const widget = createMockWidget(100)
+    const node = createMockNode()
+
+    const wrapper = mountWidgetActions(widget, node)
+
+    const resetButton = wrapper
+      .findAll('button')
+      .find((b) => b.text().includes('Reset'))
+
+    await resetButton?.trigger('click')
+
+    expect(wrapper.emitted('resetToDefault')![0]).toEqual(['option1'])
+  })
+})

src/components/rightSidePanel/parameters/WidgetActions.vue

@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import { cn } from '@comfyorg/tailwind-utils'
+import { isEqual } from 'es-toolkit'
 import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 
@@ -14,7 +15,10 @@ import type { SubgraphNode } from '@/lib/litegraph/src/subgraph/SubgraphNode'
 import type { IBaseWidget } from '@/lib/litegraph/src/types/widgets'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useDialogService } from '@/services/dialogService'
+import { useNodeDefStore } from '@/stores/nodeDefStore'
 import { useFavoritedWidgetsStore } from '@/stores/workspace/favoritedWidgetsStore'
+import { getWidgetDefaultValue } from '@/utils/widgetUtil'
+import type { WidgetValue } from '@/utils/widgetUtil'
 
 const {
   widget,
@@ -28,10 +32,15 @@ const {
   isShownOnParents?: boolean
 }>()
 
+const emit = defineEmits<{
+  resetToDefault: [value: WidgetValue]
+}>()
+
 const label = defineModel<string>('label', { required: true })
 
 const canvasStore = useCanvasStore()
 const favoritedWidgetsStore = useFavoritedWidgetsStore()
+const nodeDefStore = useNodeDefStore()
 const dialogService = useDialogService()
 const { t } = useI18n()
 
@@ -43,6 +52,19 @@ const isFavorited = computed(() =>
   favoritedWidgetsStore.isFavorited(favoriteNode.value, widget.name)
 )
 
+const inputSpec = computed(() =>
+  nodeDefStore.getInputSpecForWidget(node, widget.name)
+)
+
+const defaultValue = computed(() => getWidgetDefaultValue(inputSpec.value))
+
+const hasDefault = computed(() => defaultValue.value !== undefined)
+
+const isCurrentValueDefault = computed(() => {
+  if (!hasDefault.value) return true
+  return isEqual(widget.value, defaultValue.value)
+})
+
 async function handleRename() {
   const newLabel = await dialogService.prompt({
     title: t('g.rename'),
@@ -97,6 +119,11 @@ function handleToggleFavorite() {
   favoritedWidgetsStore.toggleFavorite(favoriteNode.value, widget.name)
 }
 
+function handleResetToDefault() {
+  if (!hasDefault.value) return
+  emit('resetToDefault', defaultValue.value)
+}
+
 const buttonClasses = cn([
   'border-none bg-transparent',
   'w-full flex items-center gap-2 rounded px-3 py-2 text-sm',
@@ -162,6 +189,21 @@ const buttonClasses = cn([
           <span>{{ t('rightSidePanel.addFavorite') }}</span>
         </template>
       </button>
+
+      <button
+        v-if="hasDefault"
+        :class="cn(buttonClasses, isCurrentValueDefault && 'opacity-50')"
+        :disabled="isCurrentValueDefault"
+        @click="
+          () => {
+            handleResetToDefault()
+            close()
+          }
+        "
+      >
+        <i class="icon-[lucide--rotate-ccw] size-4" />
+        <span>{{ t('rightSidePanel.resetToDefault') }}</span>
+      </button>
     </template>
   </MoreButton>
 </template>