feat(tooltip):增加onShow与onHide钩子 (#2028)

* feat(tooltip): 增加onShow与onHide钩子

增加onShow与onHide钩子，让调用方可以感知tooltip出现与消失的时机，与V3能力拉齐

* test(tooltip.test): 补充测试用例

* test(tooltip.test): 修改测试用例

改为专用手势模拟与方法断言

Author: SakonSun

packages/f2/src/components/tooltip/withTooltip.tsx

@@ -71,6 +71,14 @@ export interface TooltipProps {
   custom?: boolean;
   tooltipMarkerStyle?: any;
   onChange?: any;
+  /**
+   *  tooltip 展示回调
+   */
+  onShow?: () => void;
+  /**
+   *  tooltip 隐藏回调
+   */
+  onHide?: () => void;
   showXTip?: boolean;
   /**
    * x 的位置点类型，record 表示按照数据取位置点，coord 表示按照坐标取位置点
@@ -175,11 +183,13 @@ export default (View) => {
     }
 
     showSnapRecords(snapRecords) {
-      const { chart, onChange } = this.props;
+      const { chart, onChange, onShow } = this.props;
       const legendItems = chart.getLegendItems();
       const { xField, yField } = snapRecords[0];
       const xScale = chart.getScale(xField);
       const yScale = chart.getScale(yField);
+      // 如果之前没有records，视为首次出现
+      const isInitShow = !this.state.records;
 
       const records = snapRecords.map((record) => {
         const { origin, xField, yField } = record;
@@ -214,15 +224,22 @@ export default (View) => {
       this.setState({
         records,
       });
+      if(isInitShow && isFunction(onShow)) {
+        onShow();
+      }
       if (isFunction(onChange)) {
         onChange(records);
       }
     }
 
     hide() {
+      const { onHide } = this.props;
       this.setState({
         records: null,
       });
+      if(isFunction(onHide)) {
+        onHide();
+      }
     }
 
     render() {

packages/f2/test/components/tooltip/tooltip.test.tsx

@@ -1,4 +1,4 @@
-import { Axis, Canvas, Chart, Interval, jsx, Legend, Line, Tooltip } from '../../../src';
+import { Axis, Canvas, Chart, Interval, jsx, Legend, Line, Tooltip, createRef } from '../../../src';
 import { createContext, delay, gestureSimulator } from '../../util';
 
 const data = [
@@ -587,4 +587,32 @@ describe('tooltip', () => {
     await delay(500);
     expect(context).toMatchImageSnapshot();
   });
+
+  it('Tooltip onShow与onHide钩子触发且每次展示消失仅触发一次', async () => {
+    const context = createContext('Tooltip onShow与onHide钩子触发且每次展示消失仅触发一次');
+    const onShowCb = jest.fn();
+    const onHideCb = jest.fn();
+    const { props } = (
+      <Canvas context={context} pixelRatio={1}>
+        <Chart data={data} >
+          <Axis field="genre" />
+          <Axis field="sold" />
+          <Interval x="genre" y="sold" color="genre" />
+          <Tooltip snap showCrosshairs onShow={onShowCb} onHide={onHideCb} />
+        </Chart>
+      </Canvas>
+    );
+
+    const canvas = new Canvas(props);
+    await canvas.render();
+    await delay(1000);
+    await gestureSimulator(context.canvas, 'touchstart', { x: 30, y: 30 });
+    await delay(1000);
+    await gestureSimulator(context.canvas, 'touchmove', { x: 31, y: 31 });
+    await delay(1000);
+    await gestureSimulator(context.canvas, 'touchend', { x: 32, y: 32 });
+
+    expect(onShowCb.mock.calls.length).toBe(1); 
+    expect(onHideCb.mock.calls.length).toBe(1); 
+  });
 });