Incubator-echarts: DataZoom Slider Does Not Respect Y Axis min if positive value

[Dus1988]

Version

4.2.1

Steps to reproduce

Create a 2 axis Cartesian chart
make x axis category, and y axis a value axis.
set y axis minimum to a positive value
set datazoom on y axis as a slider
Notice chart y axis does not adhere to y-axis minimum, instead is 0

What is expected?

If y axis has a min and/or max set, the data zoom should adhere and have the same range as the chart's y axis

What is actually happening?

chart's y axis listens to y axis min, but data zoom bottom(start) on y axis is always equal to 0 if yAxis.min is a positive number. If min is set to a negative number, datazoom will respect it.

---

this can be replicated on the demo linked below.

notice datazoom y axis bottom is equal to -30.
change y axis min to 10.
notice datazoom y axis bottom is equal to 0

https://ecomfe.github.io/echarts-examples/public/editor.html?c=line-draggable

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[Dus1988]

Here is a screenshot of the issue

[Dus1988]

Update: this also happens with the X axis.

[susiwen8]

@Dus1988 axis scale is set to 'false' as default, and if min or max was set, scale shouldn't work, but it didn't check
https://github.com/apache/incubator-echarts/blob/master/src/component/dataZoom/AxisProxy.js#L476

[susiwen8]

@Dus1988 at this moment, you can add scale to true in option to fix this problem
yAxis: { min: 10, max: 60, scale: true, type: 'value', scale: true, axisLine: { onZero: false } },