pissang commented on a change in pull request #11847: Fix visualMap has error
when stops is empty array (#5801)
URL:
https://github.com/apache/incubator-echarts/pull/11847#discussion_r362710952
##########
File path: src/component/visualMap/PiecewiseModel.js
##########
@@ -369,6 +369,30 @@ var PiecewiseModel = VisualMapModel.extend({
}
}, this);
+ // stop needs to have something
+ if (!stops.length) {
+ // get value axis
+ var cartesian =
visualMapModel.ecModel.getComponent('series').coordinateSystem;
+ var baseAxis = cartesian.getBaseAxis();
+ var valueAxis = cartesian.getOtherAxis(baseAxis);
+ var extent = valueAxis.scale.getExtent();
+ zrUtil.each(pieceList, function (piece) {
+ for (var i = 0; i < piece.interval.length; i++) {
+ // Because CanvasRenderingContext2D doesn't support
Infinity
+ // So set stop value to axis end.
+ var value = piece.interval[i] === -Infinity
+ ? extent[0]
+ : piece.interval[i] === Infinity
+ ? extent[1]
+ : piece.interval[i];
+ stops.push({
+ value: value,
+ color: piece.visual.color
+ });
+ }
+ });
+ }
+
Review comment:
This specific defensive code should be put in the LineView.
https://github.com/apache/incubator-echarts/blob/master/src/chart/line/LineView.js#L157
VisualMap should be not aware of the implementation detail of series.
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