🥰 [FEATURE] 增加控件的监听事件“drawEnd”

[chinyifei]

💻 Features description [Please make everyone to understand it]

  监听控件‘line’|‘polygon’|‘rect’|‘circle’绘制结束事件

🏞 What problem does this feature solve

  当控件结束绘制之后，退出当前的绘制状态，可以实现不必用户再次点击激活的绘制类型退出绘制状态

🧐 What does the proposed API look like

名称	说明	类型
ControlEvent.DrawChange	'drawChange'	当激活绘制变化时触发
ControlEvent.DataChange	'dataChange'	当绘制数据发生更改时触发
ControlEvent.DrawEnd	'drawEnd'	当前绘制结束

🚑 Any additional [like screenshots]

目前我的实现是这样的：

  drawControl.on(ControlEvent.DrawSelect, (drawType, feature) => {
        console.log('当前选中数据发生更改', drawType, feature);
        // 退出绘制状态
        if (!feature) {
          drawControl.setActiveType(drawType);
        }
      });