在Python中密谋：如何在悬停时突出显示跟踪？ [英] Plotly in Python: how to highlight a trace on hover?

问题描述

我有以下图形定义：

import plotly.graph_objects as go
fig = go.Figure()
fig.add_trace(go.Scatter(x=[1,2,3], y=[1,2,3], name="A"))
fig.add_trace(go.Scatter(x=[1,2,3], y=[1,3,5], name="B"))
fig.show()

我想突出显示一个跟踪悬停，这将减少所有其他跟踪的不透明性，并使选定的跟踪变粗。

I would like to highlight a trace upon hover, which would reduce the opacity of all other traces and make the selected one bold preferably.

有没有一种方法可以实现此目的？

Is there a way to achieve this?

推荐答案

感谢 vestland ，我想通过遵循此链接。我必须将 go.Figure 更改为 go.FigureWidget ，还必须添加显示在提供的链接中的update_trace 方法。然后，我将 on_click 回调更改为 on_hover 并成功。该解决方案并不理想，我真的不喜欢我们需要遍历每个数据点的事实，而且我不喜欢 update_trace 函数依赖 go.FigureWidget 来自外部作用域的对象，所以如果有人有更干净的方法来解决此问题，请告诉我们。

Thanks to vestland, I think I managed to get it working by following this link. I had to change go.Figure to go.FigureWidget and I also had to add a update_trace method that appears in the provided link. Then I changed on_click callback to on_hover and it worked. The solution isn't ideal, I don't really like the fact that we need to loop over each data point and I don't like that the update_trace function relies on go.FigureWidget object from outer scope, so if anyone has a cleaner way to solve this, please let us know.

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