Ensure that the timetracking tooltip is removed when the mouse leaves diagram

[philippotto]

The chart library seems to be a bit buggy. In addition, to the position fix, we now have a new issue. When zooming in and out while the tooltip is visible, the tooltip won't disappear afterwards (also the content will not change anymore).

As a dirty fix, I added code to the mouse move listener which simply checks whether we are hovering a time entry element (recognizable because it's a rect with a stroke color). If not, the tooltip is removed. Not elegant, but it at least works 🙄

URL of deployed dev instance (used for testing):

• https://fixstickytooltip.webknossos.xyz

Steps to test:

• hover over time statistics and zoom in and out while the tooltip is visible
• the tooltip should hide/appear as expected

Issues:

• contributes to Improve time tracking #4076

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• Updated changelog
• Ready for review

[daniel-wer]

Works well, thanks for taking the time to find a workaround for this bug!
What I don't get from the code is how you know that the tooltip should be removed (what in the isTargetNotATimeEntry condition indicates that the tooltip should be removed)?

[philippotto]

What I don't get from the code is how you know that the tooltip should be removed (what in the isTargetNotATimeEntry condition indicates that the tooltip should be removed)?

In general, the tooltip should only be visible when the mouse hovers over a time entry rectangle (that's how the library works by default). So, if the mouse is not over such a rect, we can remove the tooltip. Consequently, the user cannot copy&paste something from within the tooltip, but, as I said, the default behavior of the library is like that. Hope that's fine :)