feat(坐标轴): 支持显示纵轴单位

feat(视口): 支持恢复受控缩放范围
feat(data): 扩展示例波形数据与测试覆盖
2026-08-18 10:06:36 +08:00 · 2026-08-18 09:08:36 +08:00 · 2026-08-17 14:34:15 +08:00
22 changed files with 448 additions and 90 deletions
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ const data = ref<WaveformData>({
 ### Props

 | Prop                              | 类型                                        | 默认值                                                  | 说明                                          |
-| --------------------------------- | ------------------------------------------- | ------------------------------------------------------- | ---------------------------------- |
+| --------------------------------- | ------------------------------------------- | ------------------------------------------------------- | --------------------------------------------- |
 | `data`                            | `WaveformData`                              | 必填                                                    | 波形数据                                      |
 | `displayMode`                     | `'independent' \| 'separated' \| 'compact'` | `'independent'`                                         | 图框布局                                      |
 | `overlayMode`                     | `'single-axis' \| 'multi-axis'`             | `'single-axis'`                                         | 叠加曲线的 Y 轴模式                           |
@@ -253,6 +253,20 @@ X 轴且包含多个轨道时使用按稳定 track ID 索引的 `yRanges`。平
 重置组件内部缩放并触发 `zoom-reset`；调用方应在事件中取消区间请求并恢复首次完整数据。
 外部重置按钮也可以通过模板引用调用组件公开的 `resetViewport()` 方法，然后执行相同的数据恢复逻辑。

+宿主在替换局部数据后如果需要恢复之前保存的 X 视口，可以调用公开的
+`setViewportDomain(domain, trackIndex?)`。传入范围使用原始秒坐标，组件会按当前数据边界、
+`xDomainStrategy`、`minZoomSpan` 和 `minVisiblePoints` 重新约束；无效范围会被忽略。共享
+X 轴模式直接传入一个范围，独立模式可以按实际 `trackIndex` 分别设置（省略 `trackIndex`
+时应用到当前所有图框）：
+
+```ts
+chartRef.value?.setViewportDomain(previousDomain)
+chartRef.value?.setViewportDomain(trackDomain, trackIndex)
+```
+
+建议在 `data` 引用更新后调用该方法。组件也会在数据引用变更时重投影当前内部视口，避免新
+数据边界使旧 transform 失效；`resetViewport(trackIndex?)` 的既有行为保持不变。
+
 没有显式配置初始范围时，可以通过 `xDomainStrategy` 将数据范围扩展为便于阅读的视口端点。
 默认的 `{ type: 'data' }` 保持数据最小值和最大值不变；`type: 'nice'` 使用固定刻度数量计算
 易读边界，且只扩展视口，不修改原始点位、tooltip、标注或缩放事件值：
@@ -284,6 +298,34 @@ X 轴且包含多个轨道时使用按稳定 track ID 索引的 `yRanges`。平
 Tooltip 每个系列按 `炮号：通道  (x:值 y:值)` 格式显示。`WaveformSeries.shotNo` 为空或未提供时，
 炮号显示为“未配置炮号”；Tooltip 不显示单位和误差附加文本。

+### 纵轴单位
+
+可在每个 `WaveformSeries` 上设置可选的 `unit`，单位会显示在对应 Y 轴的顶部刻度中：
+
+```ts
+const chartData = {
+  kind: 'series',
+  series: [
+    {
+      id: 'voltage',
+      name: '电压',
+      unit: 'V',
+      data: {
+        kind: 'points',
+        points: [
+          { x: 0, y: 1200 },
+          { x: 1, y: 3000 },
+        ],
+      },
+    },
+  ],
+} satisfies WaveformData
+```
+
+当 Y 轴使用科学计数法时，顶部刻度格式为 `E+03 (V) 3`；未使用科学计数法时，格式为
+`(V) 3`。单位为空、全为空白或未配置时，不显示 `(单位)`，例如仍显示为 `E+03 3` 或 `3`。
+多 Y 轴模式下，每根轴使用该轴首个 series 的单位。
+
 ### 线型、点型与误差棒

 每条序列可以独立设置连线方式、数据点符号和误差棒：
@@ -415,7 +457,8 @@ Demo 左侧控制面板提供标题实时预览，可配置标题名称、显隐

 ### 图例与曲线显隐

-`legend.backgroundColor` 设置多曲线图例的背景颜色。该字段接受任意有效 CSS 颜色值，
+每个图框独立管理自己的图例：图框内有两条或更多曲线时显示图例，只有一条曲线时不显示。
+`legend.backgroundColor` 设置图例的背景颜色。该字段接受任意有效 CSS 颜色值，
 可通过 `rgba(...)` 或 `hsla(...)` 中的 alpha 通道调整透明度：

 ```vue
@@ -654,7 +697,7 @@ async function importAnnotationFile(file: File) {
 字段无效时会抛出 `TypeError`，不会返回部分结果。导入包含未知 `seriesId` 的标注是允许的，
 对应曲线加载后会恢复显示。文件选择、错误提示和下载由业务层实现。

-X 轴刻度和左右端点先按 `timeUnit` 转换为秒或毫秒，再显示为不带分组符和科学计数法的完整普通十进制值，并可通过 `axes.x.labelFormatter` 自定义。Y 轴会根据完整显示域选择格式：最大绝对值在 `[0.01, 100)` 时显示两位普通小数；大于等于 `100`，或大于 `0` 且小于 `0.01` 时，刻度显示两位缩放值，并在轴末端单独显示共享倍率 `E±NN`，多 Y 轴分别计算倍率。tooltip 使用最多 4 位小数的本地化普通数字并省略无意义尾零；标注编辑器的 X 坐标跟随 `timeUnit` 并固定 3 位小数，Y 坐标显示完整普通十进制。所有格式化都只发生在展示层，内部坐标值保持原始精度。
+X 轴刻度和左右端点先按 `timeUnit` 转换为秒或毫秒，再显示为不带分组符和科学计数法的完整普通十进制值，并可通过 `axes.x.labelFormatter` 自定义。Y 轴会根据完整显示域选择格式：最大绝对值在 `[0.01, 100)` 时显示两位普通小数；大于等于 `100`，或大于 `0` 且小于 `0.01` 时，刻度显示两位缩放值，并在顶部刻度单独显示共享倍率 `E±NN`。如果 series 配置了 `unit`，顶部刻度会在倍率后追加 `(单位)`；没有科学计数法时也会显示 `(单位)`，多 Y 轴分别使用对应轴首个 series 的单位。tooltip 使用最多 4 位小数的本地化普通数字并省略无意义尾零；标注编辑器的 X 坐标跟随 `timeUnit` 并固定 3 位小数，Y 坐标显示完整普通十进制。所有格式化都只发生在展示层，内部坐标值保持原始精度。
 标注框默认布局在采样点正上方，只做绘图区边界裁剪；文本框通过连接箭头指向标注位置，多个标注重叠时可通过拖动手动避让。

 ## 事件
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "waveform-analysis",
-  "version": "0.1.37",
+  "version": "0.1.40",
  "main": "./dist/index.cjs",
  "module": "./dist/index.js",
  "types": "./dist/types/index.d.ts",
--- a/src/App.test.ts
+++ b/src/App.test.ts
@@ -235,7 +235,7 @@ describe('App workspace layout', { timeout: 20_000 }, () => {
      tracks.map((track) =>
        track.findAll('.waveform-chart__series').map((item) => item.attributes('data-series-name')),
      ),
-    ).toEqual([['正弦基波'], ['谐波扰动'], ['阻尼振荡'], ['阶跃响应']])
+    ).toEqual([['正弦基波'], ['谐波扰动', '谐波对比'], ['阻尼振荡'], ['阶跃响应']])
    expect(
      tracks
        .slice(1)
@@ -253,6 +253,7 @@ describe('App workspace layout', { timeout: 20_000 }, () => {
    expect(simulatedSeries.map((item) => item.name)).toEqual([
      '正弦基波',
      '谐波扰动',
+      '谐波对比',
      '阻尼振荡',
      '阶跃响应',
      '脉冲响应',
@@ -321,7 +322,6 @@ describe('App workspace layout', { timeout: 20_000 }, () => {
    const styleSelect = frameControls.findAllComponents(Select)[0]

    expect(colorPickers).toHaveLength(2)
-
    const initialFrames = wrapper.findAll('.waveform-chart__plot-frame')
    expect(initialFrames.length > 1 && initialFrames.every((frame) => frame.attributes('stroke-width') === '2')).toBe(true)

--- a/src/components/WaveformChart.vue
+++ b/src/components/WaveformChart.vue
@@ -36,6 +36,7 @@ const controller = useWaveformChartController(props as ResolvedWaveformChartProp

 defineExpose({
  resetViewport: controller.resetViewport,
+  setViewportDomain: controller.setViewportDomain,
 })
 </script>

--- a/src/components/core/layout.ts
+++ b/src/components/core/layout.ts
@@ -103,6 +103,7 @@ export function axisTextMetrics(
  domain: [number, number],
  nice = true,
  tickValues?: number[],
+  unit?: string,
 ): { tickTextWidth: number } {
  const scale = scaleLinear(domain, [1, 0])
  if (nice) scale.nice()
@@ -112,7 +113,7 @@ export function axisTextMetrics(
  const maximumTickCharacters = Math.max(
    1,
    ...values.map(
-      (value) => formatScientificAxisLabel(value, { axisMin, axisMax, topTickValue }).length,
+      (value) => formatScientificAxisLabel(value, { axisMin, axisMax, topTickValue, unit }).length,
    ),
  )
  return {
@@ -122,7 +123,8 @@ export function axisTextMetrics(

 export function measureYAxisGroupClearance(group: YAxisSeriesGroup): number {
  return (
-    axisTextMetrics(group.domain, !group.fixed).tickTextWidth +
+    axisTextMetrics(group.domain, !group.fixed, undefined, group.seriesList[0]?.unit)
+      .tickTextWidth +
    Y_AXIS_TICK_PADDING +
    Y_AXIS_LABEL_GAP +
    Y_AXIS_LABEL_BAND_WIDTH +
@@ -132,7 +134,8 @@ export function measureYAxisGroupClearance(group: YAxisSeriesGroup): number {

 function measureYAxisGroupTickClearance(group: YAxisSeriesGroup): number {
  return (
-    axisTextMetrics(group.domain, !group.fixed).tickTextWidth +
+    axisTextMetrics(group.domain, !group.fixed, undefined, group.seriesList[0]?.unit)
+      .tickTextWidth +
    Y_AXIS_TICK_PADDING +
    Y_AXIS_OUTER_PADDING
  )
--- a/src/components/core/trackLayoutBuilder.ts
+++ b/src/components/core/trackLayoutBuilder.ts
@@ -135,7 +135,12 @@ export function buildTrackLayouts(options: BuildTrackLayoutsOptions): TrackLayou
      const tickValues = Array.from(
        new Set([axisStart, ...visibleMajorTicks, ...(showAxisEnd ? [axisEnd] : [])]),
      )
-      const { tickTextWidth } = axisTextMetrics(group.domain, !group.fixed, tickValues)
+      const { tickTextWidth } = axisTextMetrics(
+        group.domain,
+        !group.fixed,
+        tickValues,
+        group.seriesList[0]?.unit,
+      )
      const clearance =
        tickTextWidth +
        Y_AXIS_TICK_PADDING +
--- a/src/components/core/useWaveformChartController.ts
+++ b/src/components/core/useWaveformChartController.ts
@@ -259,6 +259,9 @@ export function useWaveformChartController(
    trackLayouts,
    innerWidth,
    innerHeight,
+    sharedZoomDomain,
+    initialXDomain,
+    sharedTransform,
    activeInteractionMode,
    hiddenSeriesIdSet,
    internalHiddenSeriesIds,
--- a/src/components/core/useWaveformChartLifecycle.ts
+++ b/src/components/core/useWaveformChartLifecycle.ts
@@ -39,6 +39,9 @@ interface LifecycleContext {
  trackLayouts: ComputedRef<TrackLayout[]>
  innerWidth: ComputedRef<number>
  innerHeight: ComputedRef<number>
+  sharedZoomDomain: ComputedRef<[number, number]>
+  initialXDomain: ComputedRef<[number, number]>
+  sharedTransform: ShallowRef<ZoomTransform>
  activeInteractionMode: ComputedRef<string | undefined>
  hiddenSeriesIdSet: ComputedRef<Set<string>>
  internalHiddenSeriesIds: Ref<Set<string>>
@@ -93,6 +96,9 @@ export function useWaveformChartLifecycle(context: LifecycleContext) {
    trackLayouts,
    innerWidth,
    innerHeight,
+    sharedZoomDomain,
+    initialXDomain,
+    sharedTransform,
    activeInteractionMode,
    hiddenSeriesIdSet,
    internalHiddenSeriesIds,
@@ -144,25 +150,24 @@ export function useWaveformChartLifecycle(context: LifecycleContext) {
    emit('page-change', nextPage, pageCount.value)
  }

+  let pendingSharedXDomain: [number, number] | undefined
  let pendingIndependentXDomains: Array<[number, number] | undefined> | undefined

  function handleBeforeDataReferenceChange() {
-    if (props.displayMode !== 'independent') return
+    if (props.displayMode === 'independent') {
+      pendingSharedXDomain = undefined
      pendingIndependentXDomains = trackLayouts.value.map((track) => {
-      const configuredDomain =
-        props.initialXDomains?.[track.series.trackId ?? track.series.id] ??
-        props.initialXDomains?.[track.series.id] ??
-        props.initialXDomain
-      if (
-        !configuredDomain ||
-        !Number.isFinite(configuredDomain[0]) ||
-        !Number.isFinite(configuredDomain[1]) ||
-        configuredDomain[0] === configuredDomain[1]
-      ) {
-        return undefined
-      }
-      return track.xScale.domain() as [number, number]
+        const current = track.xScale.domain() as [number, number]
+        const boundary = resolveInitialTrackDomain(track)
+        return current[1] - current[0] < boundary[1] - boundary[0] - 1e-12 ? current : undefined
      })
+      return
+    }
+    pendingIndependentXDomains = undefined
+    const current = sharedZoomDomain.value
+    const boundary = initialXDomain.value
+    pendingSharedXDomain =
+      current[1] - current[0] < boundary[1] - boundary[0] - 1e-12 ? [...current] : undefined
  }

  function handleDataReferenceChange() {
@@ -186,10 +191,15 @@ export function useWaveformChartLifecycle(context: LifecycleContext) {
        })
        independentTransforms.value = nextTransforms
        pendingIndependentXDomains = undefined
-        void nextTick(configureZoom)
-        return
+      } else if (props.displayMode !== 'independent' && pendingSharedXDomain) {
+        const boundary = initialXDomain.value
+        const groups = trackLayouts.value
+          .filter((track) => track.hasVisibleSeries)
+          .map((track) => track.seriesList)
+        const domain = constrainZoomDomain(pendingSharedXDomain, boundary, groups, props)
+        sharedTransform.value = transformForDomain(domain, boundary, innerWidth.value)
+        pendingSharedXDomain = undefined
      }
-      pendingIndependentXDomains = undefined
      configureZoom()
    })
  }
--- a/src/components/core/useWaveformLayout.ts
+++ b/src/components/core/useWaveformLayout.ts
@@ -112,7 +112,11 @@ export function useWaveformLayout(context: LayoutContext) {
      .flatMap((track) =>
        resolveYAxisSeriesGroups(track, props.overlayMode, props.yDomain, props.yDomains),
      )
-      .map((group) => axisTextMetrics(group.domain, !group.fixed).tickTextWidth)
+      .map(
+        (group) =>
+          axisTextMetrics(group.domain, !group.fixed, undefined, group.seriesList[0]?.unit)
+            .tickTextWidth,
+      )
    const tickTextWidth = Math.max(Y_AXIS_CHARACTER_WIDTH, ...axisText)
    const tickClearance = tickTextWidth + Y_AXIS_TICK_PADDING + Y_AXIS_OUTER_PADDING
    const labelCenterX = -(
--- a/src/components/interaction/useWaveformViewport.ts
+++ b/src/components/interaction/useWaveformViewport.ts
@@ -11,6 +11,7 @@ import type {
 import type { AnnotationSeriesCandidate } from '../annotation'
 import { tryReleasePointerCapture } from './pointerCapture'
 import { transitionViewportInteraction } from './viewportInteractionState'
+import { createViewportDomainSetter } from './viewportDomain'
 import { constrainZoomDomain, transformForDomain } from './zoomConstraints'
 interface ViewportContext {
  props: ResolvedWaveformChartProps
@@ -344,6 +345,20 @@ export function useWaveformViewport(context: ViewportContext) {
    editorSeriesOptions.value = []
    void nextTick(configureZoom)
  }
+  const setViewportDomain = createViewportDomainSetter({
+    props,
+    trackLayouts,
+    initialXDomain,
+    resolveInitialTrackDomain,
+    innerWidth,
+    sharedTransform,
+    independentTransforms,
+    cancelPendingZoom,
+    cancelViewportDrag,
+    clearHover,
+    editorSeriesOptions,
+    configureZoom,
+  })
  const requestViewportReset = (event: MouseEvent) => {
    if (isPresentationMode.value || !props.zoomable || !isZoomMode.value) return
    if (props.displayMode === 'independent') {
@@ -372,6 +387,7 @@ export function useWaveformViewport(context: ViewportContext) {
    finishViewportDrag,
    cancelViewportDrag,
    resetViewport,
+    setViewportDomain,
    requestViewportReset,
  }
 }
--- a/src/components/interaction/viewportDomain.ts
+++ b/src/components/interaction/viewportDomain.ts
@@ -0,0 +1,60 @@
+import { nextTick, type ComputedRef, type Ref, type ShallowRef } from 'vue'
+import type { ZoomTransform } from 'd3'
+
+import type { TrackLayout } from '../core/types'
+import type { ResolvedWaveformChartProps } from '../core/waveformChartTypes'
+import type { AnnotationSeriesCandidate } from '../annotation'
+import { constrainZoomDomain, transformForDomain } from './zoomConstraints'
+
+interface ViewportDomainContext {
+  props: ResolvedWaveformChartProps
+  trackLayouts: ComputedRef<TrackLayout[]>
+  initialXDomain: ComputedRef<[number, number]>
+  resolveInitialTrackDomain: (track: TrackLayout) => [number, number]
+  innerWidth: ComputedRef<number>
+  sharedTransform: ShallowRef<ZoomTransform>
+  independentTransforms: ShallowRef<ZoomTransform[]>
+  cancelPendingZoom: () => void
+  cancelViewportDrag: () => void
+  clearHover: () => void
+  editorSeriesOptions: Ref<AnnotationSeriesCandidate[]>
+  configureZoom: () => void
+}
+
+export function createViewportDomainSetter(context: ViewportDomainContext) {
+  return (domain: [number, number], trackIndex?: number) => {
+    if (!Number.isFinite(domain[0]) || !Number.isFinite(domain[1]) || domain[0] === domain[1])
+      return
+    context.cancelPendingZoom()
+    context.cancelViewportDrag()
+    if (context.props.displayMode === 'independent') {
+      const indexes =
+        trackIndex === undefined
+          ? context.trackLayouts.value.map((track) => track.index)
+          : [trackIndex]
+      const nextTransforms = [...context.independentTransforms.value]
+      indexes.forEach((index) => {
+        const track = context.trackLayouts.value.find((item) => item.index === index)
+        if (!track) return
+        const boundary = context.resolveInitialTrackDomain(track)
+        const constrained = constrainZoomDomain(domain, boundary, [track.seriesList], context.props)
+        nextTransforms[index] = transformForDomain(constrained, boundary, track.width)
+      })
+      context.independentTransforms.value = nextTransforms
+    } else {
+      const boundary = context.initialXDomain.value
+      const groups = context.trackLayouts.value
+        .filter((track) => track.hasVisibleSeries)
+        .map((track) => track.seriesList)
+      const constrained = constrainZoomDomain(domain, boundary, groups, context.props)
+      context.sharedTransform.value = transformForDomain(
+        constrained,
+        boundary,
+        context.innerWidth.value,
+      )
+    }
+    context.clearHover()
+    context.editorSeriesOptions.value = []
+    void nextTick(context.configureZoom)
+  }
+}
--- a/src/components/rendering/WaveformTrackAxes.vue
+++ b/src/components/rendering/WaveformTrackAxes.vue
@@ -44,9 +44,10 @@ function renderAxes() {
    if (!element) return
    const [axisMin, axisMax] = axis.scale.domain()
    const topTickValue = Math.max(...axis.tickValues)
+    const unit = axis.seriesList[0]?.unit
    const yAxis = (axis.side === 'left' ? axisLeft(axis.scale) : axisRight(axis.scale))
      .tickFormat((value) =>
-        formatScientificAxisLabel(Number(value), { axisMin, axisMax, topTickValue }),
+        formatScientificAxisLabel(Number(value), { axisMin, axisMax, topTickValue, unit }),
      )
      .tickSize(-4)
      .tickPadding(7)
--- a/src/components/waveformChartCases/dataLifecycle.test.ts
+++ b/src/components/waveformChartCases/dataLifecycle.test.ts
@@ -158,6 +158,12 @@ describe('WaveformChart', () => {
    expect(paths[0].attributes('data-series-name')).toBe('BT2_2M')
    const yAxisLabels = wrapper.findAll('.waveform-chart__y-axis-label')
    expect(yAxisLabels.map((label) => label.text())).toEqual(['BT2_2M', 'BT1_2M'])
+    expect(
+      wrapper
+        .findAll('.waveform-chart__axis--y .tick text')
+        .map((label) => label.text())
+        .some((label) => label.includes('(T)')),
+    ).toBe(true)
    expect(yAxisLabels.map((label) => label.attributes('fill'))).toEqual(['#0960bd', '#ff7f0e'])
    const labelX = Number(
      yAxisLabels[0].attributes('transform')?.match(/^translate\(([-\d.]+),/)?.[1],
--- a/src/components/waveformChartCases/legendVisibility.test.ts
+++ b/src/components/waveformChartCases/legendVisibility.test.ts
@@ -16,13 +16,30 @@ function annotationEditorExists() {
 }

 describe('WaveformChart', () => {
+  it('shows legends when a track contains at least two series', async () => {
+    const oneSeries = visibilitySeries()
+    if (oneSeries.kind === 'series') oneSeries.series = oneSeries.series.slice(0, 1)
+    const withoutLegend = await mountSizedChart(oneSeries, {
+      grid: { rowCount: 1, columnCount: 1 },
+    })
+    expect(withoutLegend.findAll('.waveform-chart__legend')).toHaveLength(0)
+
+    const twoSeries = visibilitySeries()
+    if (twoSeries.kind === 'series') twoSeries.series = twoSeries.series.slice(0, 2)
+    const withLegend = await mountSizedChart(twoSeries, {
+      grid: { rowCount: 1, columnCount: 1 },
+    })
+    expect(withLegend.findAll('.waveform-chart__legend')).toHaveLength(1)
+    expect(withLegend.find('.waveform-chart__legend').attributes('data-position')).toBe('top-right')
+  })
+
  it('resolves legend positions by stable track id across pages', async () => {
    const wrapper = await mountSizedChart(
      {
        kind: 'series',
-        series: Array.from({ length: 8 }, (_, index) => ({
+        series: Array.from({ length: 12 }, (_, index) => ({
          id: `series-${index}`,
-          trackId: `frame-${Math.floor(index / 2)}`,
+          trackId: `frame-${Math.floor(index / 3)}`,
          name: `series ${index}`,
          data: {
            kind: 'points' as const,
@@ -75,9 +92,9 @@ describe('WaveformChart', () => {
    const wrapper = await mountSizedChart(
      {
        kind: 'series',
-        series: Array.from({ length: 4 }, (_, index) => ({
+        series: Array.from({ length: 6 }, (_, index) => ({
          id: `series-${index}`,
-          trackId: `frame-${Math.floor(index / 2)}`,
+          trackId: `frame-${Math.floor(index / 3)}`,
          name: `series ${index}`,
          data: {
            kind: 'points',
@@ -112,7 +129,7 @@ describe('WaveformChart', () => {
    })

    const items = wrapper.findAll('.waveform-chart__legend-item')
-    expect(items).toHaveLength(2)
+    expect(items).toHaveLength(3)
    expect(items.every((item) => item.attributes('disabled') !== undefined)).toBe(true)
    expect(wrapper.get('.waveform-legend__panel').classes()).not.toContain(
      'waveform-legend__panel--interactive',
@@ -128,7 +145,7 @@ describe('WaveformChart', () => {
      overlayMode: 'multi-axis',
    })

-    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(3)
    expect(wrapper.find('[data-annotation-id="high-note"]').exists()).toBe(true)
    const annotationLayer = wrapper.get('.waveform-annotation-layer').element
    const legendLayer = wrapper.get('.waveform-chart__legend-layer').element
@@ -143,8 +160,8 @@ describe('WaveformChart', () => {

    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
-    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(1)
+    ).toEqual(['low', 'mid'])
+    expect(wrapper.findAll('.waveform-chart__axis--y')).toHaveLength(2)
    expect(wrapper.find('[data-annotation-id="high-note"]').exists()).toBe(false)
    expect(wrapper.findAll('.waveform-chart__legend-item')[1].classes()).toContain('is-hidden')
    expect(wrapper.findAll('.waveform-chart__legend-item')[1].attributes('aria-pressed')).toBe(
@@ -170,12 +187,12 @@ describe('WaveformChart', () => {
    )
    flushAnimationFrames()
    await flushPromises()
-    expect(wrapper.findAll('.waveform-chart__tooltip-series')).toHaveLength(1)
+    expect(wrapper.findAll('.waveform-chart__tooltip-series')).toHaveLength(2)
    expect(wrapper.get('.waveform-chart__tooltip-series').text()).toContain('低量程')

    await wrapper.findAll('.waveform-chart__legend-item')[1].trigger('click')
    await flushPromises()
-    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(3)
    expect(wrapper.find('[data-annotation-id="high-note"]').exists()).toBe(true)
    expect(wrapper.emitted('series-visibility-change')?.at(-1)).toEqual([
      { seriesId: 'high', visible: true, hiddenSeriesIds: [] },
@@ -191,20 +208,20 @@ describe('WaveformChart', () => {

    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
+    ).toEqual(['low', 'mid'])
    await wrapper.findAll('.waveform-chart__legend-item')[0].trigger('click')
    expect(wrapper.emitted('update:hidden-series-ids')?.at(-1)).toEqual([
      ['high', 'temporarily-absent', 'low'],
    ])
    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
+    ).toEqual(['low', 'mid'])

    await wrapper.setProps({ hiddenSeriesIds: ['low'] })
    await flushPromises()
    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['high'])
+    ).toEqual(['high', 'mid'])
  })

  it('retains uncontrolled visibility by stable ID and clears removed IDs', async () => {
@@ -223,7 +240,7 @@ describe('WaveformChart', () => {
    await flushPromises()
    expect(
      wrapper.findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['low'])
+    ).toEqual(['mid', 'low'])

    await wrapper.setProps({
      data: {
@@ -234,12 +251,12 @@ describe('WaveformChart', () => {
    await flushPromises()
    await wrapper.setProps({ data: original })
    await flushPromises()
-    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(3)
  })

  it('keeps a recoverable legend and stops chart interaction when every series is hidden', async () => {
    const wrapper = await mountSizedChart(visibilitySeries(), {
-      defaultHiddenSeriesIds: ['low', 'high'],
+      defaultHiddenSeriesIds: ['low', 'high', 'mid'],
      grid: { rowCount: 1, columnCount: 1 },
      legend: { interactive: true },
      overlayMode: 'multi-axis',
@@ -248,7 +265,7 @@ describe('WaveformChart', () => {
    expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(0)
    expect(wrapper.findAll('.waveform-chart__axis')).toHaveLength(0)
    expect(wrapper.findAll('.waveform-chart__overlay')).toHaveLength(0)
-    expect(wrapper.findAll('.waveform-chart__legend-item')).toHaveLength(2)
+    expect(wrapper.findAll('.waveform-chart__legend-item')).toHaveLength(3)
    expect(wrapper.get('.waveform-track__no-visible-series').text()).toBe('暂无可见曲线')

    await wrapper.findAll('.waveform-chart__legend-item')[0].trigger('click')
--- a/src/components/waveformChartCases/multiAxisAndPagination.test.ts
+++ b/src/components/waveformChartCases/multiAxisAndPagination.test.ts
@@ -15,6 +15,7 @@ describe('WaveformChart', () => {
          {
            trackId: 'shared-frame',
            name: '普通量程',
+            unit: 'V',
            data: {
              kind: 'points',
              points: [
@@ -26,6 +27,7 @@ describe('WaveformChart', () => {
          {
            trackId: 'shared-frame',
            name: '大量程',
+            unit: 'A',
            data: {
              kind: 'points',
              points: [
@@ -37,6 +39,7 @@ describe('WaveformChart', () => {
          {
            trackId: 'shared-frame',
            name: '小量程',
+            unit: 'T',
            data: {
              kind: 'points',
              points: [
@@ -57,7 +60,11 @@ describe('WaveformChart', () => {
          .map((label) => label.text())
          .filter((label) => label.startsWith('E')),
      ),
-    ).toEqual([[], [expect.stringMatching(/^E\+03 /)], [expect.stringMatching(/^E-04 /)]])
+    ).toEqual([
+      [],
+      [expect.stringMatching(/^E\+03 \(A\) /)],
+      [expect.stringMatching(/^E-04 \(T\) /)],
+    ])
  })

  it('reprojects annotations with the Y axis assigned to their series', async () => {
@@ -177,6 +184,18 @@ describe('WaveformChart', () => {
              ],
            },
          },
+          {
+            id: 'reference',
+            trackId: 'frame-1',
+            name: 'REF_CH_1',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 0.25 },
+                { x: 1, y: 1.25 },
+              ],
+            },
+          },
        ],
      },
      { frameNumber: 1, grid: { rowCount: 2, columnCount: 1 } },
@@ -186,7 +205,7 @@ describe('WaveformChart', () => {
    expect(tracks).toHaveLength(2)
    expect(
      tracks[0].findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
-    ).toEqual(['primary', 'comparison'])
+    ).toEqual(['primary', 'comparison', 'reference'])
    expect(
      tracks[1].findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
    ).toEqual(['second-frame'])
@@ -203,12 +222,13 @@ describe('WaveformChart', () => {
    expect(legend.findAll('.waveform-chart__legend-item').map((item) => item.text())).toEqual([
      'BT2_2M',
      'TEST_CH_1',
+      'REF_CH_1',
    ])
    expect(
      legend
        .findAll('.waveform-legend__swatch')
        .map((swatch) => swatch.get('path').attributes('stroke')),
-    ).toEqual(['#0960bd', '#2ca02c'])
+    ).toEqual(['#0960bd', '#2ca02c', '#d62728'])
    expect(wrapper.findAll('.waveform-chart__watermark').map((item) => item.text())).toEqual([
      '1',
      '2',
@@ -232,10 +252,11 @@ describe('WaveformChart', () => {
    await flushPromises()

    const tooltipSeries = wrapper.findAll('.waveform-chart__tooltip-series')
-    expect(tooltipSeries).toHaveLength(2)
+    expect(tooltipSeries).toHaveLength(3)
    expect(tooltipSeries.map((item) => item.text())).toEqual([
      expect.stringContaining('BT2_2M'),
      expect.stringContaining('TEST_CH_1'),
+      expect.stringContaining('REF_CH_1'),
    ])
  })

@@ -268,6 +289,18 @@ describe('WaveformChart', () => {
              ],
            },
          },
+          {
+            id: 'third',
+            trackId: 'shared',
+            name: 'third',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 2 },
+                { x: 1, y: 3 },
+              ],
+            },
+          },
        ],
      },
      { grid: { rowCount: 1, columnCount: 1 } },
--- a/src/components/waveformChartCases/presentationMode.test.ts
+++ b/src/components/waveformChartCases/presentationMode.test.ts
@@ -42,6 +42,19 @@ const presentationData: WaveformData = {
        ],
      },
    },
+    {
+      id: 'mid',
+      trackId: 'shared',
+      name: '中量程',
+      data: {
+        kind: 'points',
+        points: [
+          { x: 0, y: 50 },
+          { x: 1, y: 100 },
+          { x: 2, y: 75 },
+        ],
+      },
+    },
    {
      id: 'other',
      name: '其他通道',
@@ -150,9 +163,9 @@ describe('WaveformChart presentation mode', () => {
          cancelable: true,
        }),
      )
-      wrapper.get('.waveform-chart__svg').element.dispatchEvent(
-        new MouseEvent('dblclick', { bubbles: true, cancelable: true }),
-      )
+      wrapper
+        .get('.waveform-chart__svg')
+        .element.dispatchEvent(new MouseEvent('dblclick', { bubbles: true, cancelable: true }))
      await wrapper.get('[data-annotation-id="note"]').trigger('contextmenu', {
        clientX: width / 2,
        clientY: height / 2,
--- a/src/components/waveformChartCases/viewportReset.test.ts
+++ b/src/components/waveformChartCases/viewportReset.test.ts
@@ -119,6 +119,108 @@ describe('WaveformChart viewport reset', () => {
    expect(wrapper.findAll('.waveform-chart__axis-endpoint--end')[0].text()).toBe('1000')
  })

+  it('keeps a controlled shared viewport when the data reference changes', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 1, y: 1 },
+        ],
+      },
+      { displayMode: 'separated' },
+    )
+    const chart = wrapper.vm as unknown as {
+      setViewportDomain: (domain: [number, number], trackIndex?: number) => void
+    }
+    chart.setViewportDomain([0.25, 0.75])
+    await flushPromises()
+
+    const startBefore = Number(wrapper.get('.waveform-chart__axis-endpoint--start').text())
+    const endBefore = Number(wrapper.get('.waveform-chart__axis-endpoint--end').text())
+    expect(startBefore).toBeGreaterThan(0)
+    expect(endBefore).toBeLessThan(1000)
+
+    await wrapper.setProps({
+      data: {
+        kind: 'points',
+        points: [
+          { x: 0, y: 10 },
+          { x: 1, y: 11 },
+        ],
+      },
+    })
+    await flushPromises()
+
+    expect(Number(wrapper.get('.waveform-chart__axis-endpoint--start').text())).toBeCloseTo(
+      startBefore,
+      10,
+    )
+    expect(Number(wrapper.get('.waveform-chart__axis-endpoint--end').text())).toBeCloseTo(
+      endBefore,
+      10,
+    )
+  })
+
+  it('keeps independently controlled track viewports when the data reference changes', async () => {
+    const wrapper = await mountSizedChart(gridSeries(2), {
+      displayMode: 'independent',
+      grid: { rowCount: 1, columnCount: 2 },
+    })
+    const chart = wrapper.vm as unknown as {
+      setViewportDomain: (domain: [number, number], trackIndex?: number) => void
+    }
+    chart.setViewportDomain([0.2, 0.8], 0)
+    chart.setViewportDomain([0.1, 0.9], 1)
+    await flushPromises()
+
+    const endpoints = () =>
+      wrapper.findAll('.waveform-chart__track').map((track) => ({
+        start: track.get('.waveform-chart__axis-endpoint--start').text(),
+        end: track.get('.waveform-chart__axis-endpoint--end').text(),
+      }))
+    const endpointsBefore = endpoints()
+    expect(Number(endpointsBefore[0].start)).toBeGreaterThan(0)
+    expect(Number(endpointsBefore[0].end)).toBeLessThan(1000)
+    expect(Number(endpointsBefore[1].start)).toBeGreaterThan(0)
+    expect(Number(endpointsBefore[1].end)).toBeLessThan(1000)
+
+    await wrapper.setProps({ data: gridSeries(2) })
+    await flushPromises()
+
+    const endpointsAfter = endpoints()
+    endpointsAfter.forEach((endpoint, index) => {
+      expect(Number(endpoint.start)).toBeCloseTo(Number(endpointsBefore[index].start), 10)
+      expect(Number(endpoint.end)).toBeCloseTo(Number(endpointsBefore[index].end), 10)
+    })
+  })
+
+  it('ignores invalid domains and applies viewport constraints', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 1, y: 1 },
+        ],
+      },
+      { displayMode: 'separated', minZoomSpan: 0.2 },
+    )
+    const chart = wrapper.vm as unknown as {
+      setViewportDomain: (domain: [number, number], trackIndex?: number) => void
+    }
+    chart.setViewportDomain([Number.NaN, 0.5])
+    await flushPromises()
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toBe('0')
+    expect(wrapper.get('.waveform-chart__axis-endpoint--end').text()).toBe('1000')
+
+    chart.setViewportDomain([0.49, 0.51])
+    await flushPromises()
+    const start = Number(wrapper.get('.waveform-chart__axis-endpoint--start').text())
+    const end = Number(wrapper.get('.waveform-chart__axis-endpoint--end').text())
+    expect(end - start).toBeGreaterThanOrEqual(200)
+  })
+
  it('resets shared and independent explicit domains to their included nice bounds', async () => {
    const shared = await mountSizedChart(
      {
--- a/src/data/simulatedWaveforms.test.ts
+++ b/src/data/simulatedWaveforms.test.ts
@@ -3,7 +3,7 @@ import { describe, expect, it } from 'vitest'
 import { createSimulatedWaveformData } from './simulatedWaveforms'

 describe('simulated waveform data', () => {
-  it('creates deterministic, finite six-channel data', () => {
+  it('creates deterministic, finite seven-channel data with a two-series second frame', () => {
    const first = createSimulatedWaveformData()
    const second = createSimulatedWaveformData()

@@ -11,8 +11,12 @@ describe('simulated waveform data', () => {
    expect(first.kind).toBe('series')
    if (first.kind !== 'series') return

-    expect(first.series).toHaveLength(6)
-    expect(new Set(first.series.map((series) => series.id)).size).toBe(6)
+    expect(first.series).toHaveLength(7)
+    expect(new Set(first.series.map((series) => series.id)).size).toBe(7)
+    const secondFrame = first.series.filter(
+      (series) => series.trackId === 'simulated-harmonic-frame',
+    )
+    expect(secondFrame).toHaveLength(2)
    expect(new Set(first.series.map((series) => series.shotNo))).toEqual(new Set(['13300']))
    first.series.forEach((series) => {
      expect(series.data.kind).toBe('points')
--- a/src/data/simulatedWaveforms.ts
+++ b/src/data/simulatedWaveforms.ts
@@ -13,7 +13,7 @@ type ErrorGenerator = (

 interface SimulatedSeriesDefinition extends Pick<
  WaveformSeries,
-  'id' | 'shotNo' | 'name' | 'unit' | 'lineType' | 'pointType' | 'errorBar'
+  'id' | 'trackId' | 'shotNo' | 'name' | 'unit' | 'color' | 'lineType' | 'pointType' | 'errorBar'
 > {
  signal: SignalGenerator
  errors?: ErrorGenerator
@@ -60,6 +60,7 @@ const seriesDefinitions: SimulatedSeriesDefinition[] = [
  },
  {
    id: 'simulated-harmonic',
+    trackId: 'simulated-harmonic-frame',
    shotNo: '13300',
    name: '谐波扰动',
    unit: 'V',
@@ -68,6 +69,18 @@ const seriesDefinitions: SimulatedSeriesDefinition[] = [
    signal: (time) =>
      0.9 * Math.sin(TWO_PI * 0.55 * time) + 0.28 * Math.sin(TWO_PI * 2.2 * time + 0.4),
  },
+  {
+    id: 'simulated-harmonic-reference',
+    trackId: 'simulated-harmonic-frame',
+    shotNo: '13300',
+    name: '谐波对比',
+    unit: 'V',
+    color: '#2ca02c',
+    lineType: 'linear',
+    pointType: 'none',
+    signal: (time) =>
+      0.62 * Math.sin(TWO_PI * 0.55 * time + 0.55) + 0.18 * Math.sin(TWO_PI * 2.2 * time - 0.2),
+  },
  {
    id: 'simulated-damped',
    shotNo: '13300',
--- a/src/test/waveformChart.ts
+++ b/src/test/waveformChart.ts
@@ -58,6 +58,18 @@ export function visibilitySeries(): WaveformData {
          ],
        },
      },
+      {
+        id: 'mid',
+        trackId: 'shared-frame',
+        name: '中量程',
+        data: {
+          kind: 'points',
+          points: [
+            { x: 0, y: 100 },
+            { x: 1, y: 200 },
+          ],
+        },
+      },
    ],
  }
 }
--- a/src/utils/formatters.test.ts
+++ b/src/utils/formatters.test.ts
@@ -40,6 +40,15 @@ describe('waveform number formatters', () => {
    expect(formatScientificAxisExponent(0.0001, 0.0003)).toBe('E-04')
  })

+  it('appends a unit to the top tick with or without scientific notation', () => {
+    expect(formatScientificAxisLabel(3000, { axisMin: 1000, axisMax: 3000, unit: 'V' })).toBe(
+      'E+03 (V) 3',
+    )
+    expect(formatScientificAxisLabel(3, { axisMin: 0, axisMax: 3, unit: 'A' })).toBe('(A) 3')
+    expect(formatScientificAxisLabel(2, { axisMin: 0, axisMax: 3, unit: 'A' })).toBe('2')
+    expect(formatScientificAxisLabel(3, { axisMin: 0, axisMax: 3, unit: '  ' })).toBe('3')
+  })
+
  it('derives the exponent from the largest absolute endpoint', () => {
    expect(resolveScientificAxisExponent(-9000, -1000)).toBe(3)
    expect(resolveScientificAxisExponent(-100_000, -3000)).toBe(5)
--- a/src/utils/formatters.ts
+++ b/src/utils/formatters.ts
@@ -11,6 +11,7 @@ export interface ScientificAxisLabelOptions {
  axisMin?: number
  axisMax?: number
  topTickValue?: number
+  unit?: string
 }

 /** @deprecated Use ScientificAxisLabelOptions. */
@@ -71,9 +72,11 @@ export function formatScientificAxisLabel(
  const scaledValue = exponent === null ? value : value / 10 ** exponent
  const formattedValue = formatYAxisNumber(scaledValue)
  const topTickValue = options.topTickValue ?? options.axisMax
-  return exponent !== null && value === topTickValue
-    ? `${formatExponent(exponent)} ${formattedValue}`
-    : formattedValue
+  if (value !== topTickValue) return formattedValue
+  const unit = options.unit?.trim()
+  const unitLabel = unit ? `(${unit}) ` : ''
+  const exponentLabel = exponent === null ? '' : `${formatExponent(exponent)} `
+  return `${exponentLabel}${unitLabel}${formattedValue}`
 }

 /** Return the shared E-style multiplier for an axis, or null for a plain axis. */
Author	SHA1	Message	Date
李启源	233b9b0aa2	feat(坐标轴): 支持显示纵轴单位 All checks were successful Package component / package (push) Successful in 4m18s Details	2026-08-18 10:06:36 +08:00
李启源	5c71c28429	feat(视口): 支持恢复受控缩放范围 All checks were successful Package component / package (push) Successful in 4m38s Details	2026-08-18 09:08:36 +08:00
李启源	7a6a7e5c26	feat(data): 扩展示例波形数据与测试覆盖 All checks were successful Package component / package (push) Successful in 4m26s Details 新增示例谐波对比数据，完善图例、多轴和演示测试，并同步文档说明。	2026-08-17 14:34:15 +08:00