关于geo中roam的交互

[MelkorDZM]

1.在一个大的canvas里绘制一个小型的geo地图，设置了roam后只有地图周围可以拖动，周围大部分空表区域都不能拖动

2.在实现点击区域放大某一地区的功能（手动设置center和boundingCoords）后，roam的可拖动区域就变成了被选中的地区，超出范围的也不能拖动了。。。

有什么办法可以设置整个echart实例是可以被拖动和缩放的呢？

谢谢！

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[elewen]

这个问题不准备修复吗？v5.0.0 也有这个bug

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[tangdaohai]

发现了同样的问题。不过可以通过需要放到区域和整个地图的坐标宽高比例来设置 zoom 属性进行放大。

_api.getModel()?.getSeriesByIndex(0).coordinateSystem 这个 API 属性中可以拿到 _rect 属性信息：

// _chinaMapRect 为整个地图的 rect 信息
// regionInfo._rect 是某个省份的，可以在 coordinateSystem.regions 获得
const widthPer = _chinaMapRect.width / regionInfo._rect.width
const heightPer = _chinaMapRect.height / regionInfo._rect.height

echarts.setOptions({
      series: [{
          center: regionInfo.center,
          layoutCenter: ['50%', '50%'],
          layoutSize: '100%',
          zoom: Math.min(widthPer, heightPer)
      }]
})

这样可以获得理想的交互效果

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This issue has been automatically marked as stale because it did not have recent activity. It will be closed in 7 days if no further activity occurs. If you wish not to mark it as stale, please leave a comment in this issue.

[github-actions[bot]]

This issue has been automatically closed because it did not have recent activity. If this remains to be a problem with the latest version of Apache ECharts, please open a new issue and link this to it. Thanks!