app/vmui: add back action for hits chart time range

[Loori-R]

Describe Your Changes

Add a Back action to the Hits chart, allowing users to return to the previously selected time range after interacting with the chart.

Related issue: #1535

Behavior

• the Back button appears after changing the time range by zooming, panning, or clicking a bar
• the button restores the time range selected before the latest chart interaction
• only one previous time range is kept
• a new chart interaction updates the range stored by the Back button
• changing the time range through the time picker hides the Back button

Demo

restore.previous.range.mov

[cubic-dev-ai]

All reported issues were addressed across 5 files

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[arturminchukov]

Looks good! I just have one nit question. I see that we can go back to the previous state only once.
Clearer behavior for me would be to remember the time range every time I press Execute manually, as well as on every other step that changes the time range. In this case, we could go back several times. Maybe we could also add a Reset button that resets the time range to the original one.

[Loori-R]

Looks good! I just have one nit question. I see that we can go back to the previous state only once. Clearer behavior for me would be to remember the time range every time I press Execute manually, as well as on every other step that changes the time range. In this case, we could go back several times. Maybe we could also add a Reset button that resets the time range to the original one.

Thanks! Just to clarify, pressing Execute itself does not change the time range. The time range can change in three ways:

1. manually via the time picker;
2. through an interaction with the chart;
3. through an expression containing a _time filter.

The current behavior intentionally follows #1535: the Back button appears only after a chart interaction, stores a single previous time range, and disappears when the range is selected manually through the time picker.

Supporting multi-step Back and Reset requires defining history behavior for all time-range changes, including _time filters and relative time, so I suggest keeping this PR scoped to #1535 and handling that separately.

[arturminchukov]

The current behavior intentionally follows #1535: the Back button appears only after a chart interaction, stores a single previous time range, and disappears when the range is selected manually through the time picker.

Got it. As a user, I expected that after zooming in on the bar chart twice, I'd be able to get back to the original state. So it has confused me a little bit.

[hagen1778]

While I like how it works, it still bites me visually. The Back button requires a lot of horizontal space and breaks UI on 14" display:

Do you think it can be displayed in a different place so it doesn't compete for horizontal space? Or maybe we can change button text to something shorter: Back to prev range?

[Loori-R]

Do you think it can be displayed in a different place so it doesn't compete for horizontal space? Or maybe we can change button text to something shorter: Back to prev range?

Back to prev range sounds good. We can show the full date range in a tooltip on hover.

[Loori-R]

Updated the button label: