tmtron commented on issue #15775:
URL: https://github.com/apache/echarts/issues/15775#issuecomment-996834908
>We are trying to keep all exposed API are simple and consistent.
In the case of a click event for the data-zoom slider, there is anyway only
very little info that you can send along:
* the click point
* optionally the selected range.
this is maybe not required, when you can also ask the chart-instance fot
he currently selected range and maybe find out if the click-point is in the
selected zoom range, or outside
>API that only solve one very specific case needs to be added very carefully.
A click event is something very generic and for sure not tied to a single
use-case.
There are many more things that this can be used for:
e.g. we have a config mode, where the users can configure/move/resize the
charts. in this mode, a click on the zoom slider could bring up a config
dialog, where they can configure the slider: e.g.
* [slider
properties](https://echarts.apache.org/en/option.html#dataZoom-slider): color,
handleSize, ..
* a check-box if they want to show the slider at all
Another use-case that you have mentioned is the click-moves-the-zoom-window
feature.
This could easily be implemented by users of the library via this click
event.
Even better; we could implement our own strategy: e.g. maybe we want that
clicking should not move the zoom window, but expand or shrink the window to
the click-point
> > Well, I don't know a better way to do this. However I am very open to
suggestions.
>
> From my side. Your first and second solution sounds more solid on the user
experience. But that's only my humble opinion. I'm just not convinced that
adding click event on `dataZoom` can provide a good enough solution to solve
cases like this.
Well, I also thought that at first. But in the meanwhile I have changed my
mind and think that our users are right.
When you use the zoom slider handles to select a suitable range, then you
don't want to move the mouse away, to a button or menu - you want to
immediately invoke the load-action by a simple click.
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