Kendo UI Chart 缩放事件侦听器返回空轴范围

Question

用户放大后，我需要 x 轴上的更新值。根据我发现的示例 ( https://stackblitz.com/edit/angular-6fbwjp?file=app/app.component.ts )，我可以使用缩放事件侦听器。

用于放大的 Kendo UI 文档：

从此处的图像中，您可以看到轴范围返回为空对象 {}。为什么会这样，我该如何解决？

我的最终目标是使用放大范围来更新数据并重绘图形

ZoomEvent {sender: ChartComponent, prevented: false, axisRanges: {…}, delta: undefined, originalEvent: {…}}

axisRanges:

__proto__: Object

delta: undefined

originalEvent: {distance: 0, event: PointerEvent, target: path, touches: Array(1), preventDefault: ƒ, …}

prevented: false

sender: ChartComponent {configurationService: ConfigurationService, axisLabelClick: EventEmitter, drag: EventEmitter, dragEnd: EventEmitter, dragStart: EventEmitter, …}

__proto__: PreventableEvent

<kendo-chart [pannable]="{ lock: 'y' }" [zoomable]="{ mousewheel :{ lock: 'y'}, selection: { lock: 'y' } }" (zoom)="onZoom($event)"

    [axisDefaults]="axisDefaults" [chartArea]="chartAreaOptions" [legend]="legendOptions">

    <kendo-chart-series>

      <!-- Loop thru all readings -->

      <kendo-chart-series-item *ngFor="let readings of ReadingsData" [data]="readings.items"

        [color]="seriesOptionsArr.get(readings.value).color" [markers]="{ visible: false }"

        [name]="seriesOptionsArr.get(readings.value).name" type="scatterLine" xField="timeRead" yField="sample"

        zIndex="1">

      </kendo-chart-series-item>

    </kendo-chart-series>

    <kendo-chart-x-axis>

      <kendo-chart-x-axis-item type="date" baseUnit="seconds" [min]="xAxisMin"

        [max]="xAxisMax" majorTicksVisible=false>

      </kendo-chart-x-axis-item>

    </kendo-chart-x-axis>

    <kendo-chart-y-axis>

      <kendo-chart-y-axis-item ...>

      </kendo-chart-y-axis-item>

    </kendo-chart-y-axis>

  </kendo-chart>

Answer 1

问题是轴需要有一个名字。如下添加名称后，axisRange 将添加到事件信息中。&nbsp; &nbsp; &nbsp; <kendo-chart-x-axis-item type="date" baseUnit="seconds" [labels]="{ format: getAxisDateFormat()}"&nbsp; &nbsp; &nbsp; &nbsp; [majorGridLines]="{ visible: false }"&nbsp; &nbsp; &nbsp; &nbsp; [minorGridLines]="{ visible: false }" [min]="xAxisMin"&nbsp; &nbsp; &nbsp; &nbsp; [max]="xAxisMax" majorTicksVisible=false name='date_axis'>&nbsp; &nbsp; &nbsp; </kendo-chart-x-axis-item>例如。&nbsp;https://stackblitz.com/edit/angular-m2cvrw?file=app/app.component.ts