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Add the hover component on timeline chart shown when user mouse is over#468

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kyasbal merged 2 commits into
GoogleCloudPlatform:epic/timeline-v2from
kyasbal:epic/timeline-v2-add-timeline-hover-overlay
Jan 21, 2026
Merged

Add the hover component on timeline chart shown when user mouse is over#468
kyasbal merged 2 commits into
GoogleCloudPlatform:epic/timeline-v2from
kyasbal:epic/timeline-v2-add-timeline-hover-overlay

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@kyasbal

@kyasbal kyasbal commented Jan 19, 2026

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This PR adds TimelineHoverOverlayComponent. This component provides information about the logs around the mouse pointer when user moves mouse over the timeline items.

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Summary of Changes

Hello @kyasbal, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the user experience of the timeline chart by introducing a new TimelineHoverOverlayComponent. This component provides an interactive and detailed view of log entries, including revisions and events, directly on the timeline when a user hovers their mouse over specific items. This allows users to quickly gain context and insights into the resource's historical changes and associated events without navigating away from the timeline view.

Highlights

  • New Component: TimelineHoverOverlayComponent: Introduces a new Angular component, TimelineHoverOverlayComponent, designed to display detailed log information when a user hovers over items in the timeline chart.
  • Enhanced Timeline Interactivity: The overlay presents a unified, chronologically sorted view of revisions and events, offering immediate context about the resource's history at specific points in time.
  • Dynamic Styling and Visual Cues: Implements distinct visual cues for various revision states (normal, partial info, deleted), log types, and severities, improving readability and information density. This includes a new SASS mixin for revision state boxes.
  • Interactive Event Handling: Supports interactive mouse events (mouseenter, click) on individual log items within the overlay, emitting specific TimelineChartMouseEvent data for further actions.
  • Advanced Color Mixing: Adds a new SASS function mix-hdr-color to common.scss, enabling the mixing of colors in the display-p3 color space for richer and more accurate color blending in the UI.
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Code Review

This pull request introduces the TimelineHoverOverlayComponent, which displays detailed information about logs when a user hovers over the timeline. The implementation leverages modern Angular signals and the new control flow syntax, with corresponding SCSS for styling. My review includes suggestions to improve code clarity in the HTML template, fix a potential layout bug in the SCSS, and remove an unused component input. Overall, this is a solid addition that enhances the user experience.

Comment thread web/src/app/timeline/components/timeline-hover-overlay.component.html Outdated
Comment thread web/src/app/timeline/components/timeline-hover-overlay.component.ts Outdated
@kyasbal kyasbal force-pushed the epic/timeline-v2-add-timeline-hover-overlay branch from 7465cf5 to 22da43e Compare January 19, 2026 04:03
@kyasbal kyasbal marked this pull request as ready for review January 19, 2026 04:03
@kyasbal kyasbal requested review from jyane and renamoo as code owners January 19, 2026 04:03
@kyasbal kyasbal force-pushed the epic/timeline-v2-add-timeline-hover-overlay branch from 22da43e to bb42042 Compare January 19, 2026 09:46
@kyasbal kyasbal merged commit 4743358 into GoogleCloudPlatform:epic/timeline-v2 Jan 21, 2026
8 of 9 checks passed
@kyasbal kyasbal deleted the epic/timeline-v2-add-timeline-hover-overlay branch January 21, 2026 00:44
kyasbal added a commit that referenced this pull request Jan 22, 2026
* Add MSDF texture generation scripts (#445)

* Add MSDF texture generation scripts

To enable extensible and high quality font/icon rendering on WebGL2, this script precalculate MSDFs and bake it on textures.
These files are going to be used in the updated timeline v2 renderer.

* Removed font generation step from CI

The font atlas textures and its output JSON files are included in repository.
This design is because it won't be conflict a lot ,its easy to regenerate to merge. I'll integrate this step with CI later.
We don't need to run it on CI again.

* Applied fixes suggested by gemini

* Apply suggestions from code review

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Signed-off-by: kyasbal <kyasbal1994@gmail.com>

* formatted icons.json

* fixed lint issue

* Removed icons.json because it's intermediate generated file

* Fix the lint issue and align the folder location with other generate task

* Move web/msdf to scripts/msdf-generator to align with the other generate scripts
* Ignored the json file from the root gitignore file for prettier to know the ignored files correctly

---------

Signed-off-by: kyasbal <kyasbal1994@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* Make msdf generator not to produce diffs (#448)

Ignored generated json files from the lint target and sort the icon list to keep it consistent.

* Add TimelineCornerIndicatorComponent and TimelineLegendComponent (#449)

* Add TimelineCornerIndicatorComponent and TimelineLegendComponent

* fix issues pointed by gemini-code-assist

* fix the issue pointed by gemini-code-assist

* Fixed the event legend message

And added the missing change to pass the storybook build

* Added angular-split used in the later commit (#451)

* Add TimelineIndexComponent (#450)

* Add TimelineIndexComponent

* fix compilation error

* Adding missing code from the commit

* fix stylesheet issues pointed by gemini-code-assist

* Fix typos in the comment

* Added base utilities for canvas (#453)

* Added base utilities for canvas

* Update web/src/app/timeline/components/gl/glcontextmanager.ts

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Signed-off-by: kyasbal <kyasbal1994@gmail.com>

---------

Signed-off-by: kyasbal <kyasbal1994@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* Adds algorithmic utility to implement timeline view (#452)

* Adds algorithmic utility to implement timeline view

* fixed issues pointed by gemini-code-assist

* Removed sRGB hex notation in the generated SCSS (#454)

* Removed sRGB hex notation in the generated SCSS

To show the same color with CSS and canvas(canvas2d or WebGL), removed the color setting directly specified with sRGB hex and hold them in floating point values instead.
KHI will use display-p3 color space rather than sRGB to use the wider color space.

* fix issues pointed by gemini-code-assist

* Add mising change expected to add in the commit

* Move folder from gl to canvas (#456)

the folder contained utility used for canvas 2d not WebGL. Renamed it not to confuse readers

* Add utility functions and types used for implementing the timeline header component (#457)

* Move folder from gl to canvas

the folder contained utility used for canvas 2d not WebGL. Renamed it not to confuse readers

* Added utility for drawing timeline header histogram

* fixed issues pointed by gemini-code-assist

* Added timeline header components (#458)

* Add timeline header component

* fix issue pointed by gemini-code-assist

* Fixed issues pointed by gemini-code-assist and fixed some styles

* fix typos

* Add WebGL related types used in revision renderer and event renderer (#463)

* Add WebGL related types used in revision renderer and event renderer

* fixed issues pointed by gemini-code-assist

* Add renderer for drawing event points (#464)

* Add WebGL related types used in revision renderer and event renderer

* fixed issues pointed by gemini-code-assist

* Add renderer for drawing event points

* fix suggested by gemini-code-assist

* Add renderer drawing revision rectangles (#465)

* Add WebGL related types used in revision renderer and event renderer

* fixed issues pointed by gemini-code-assist

* Add renderer drawing revision rectangles

* fix issue pointed by gemini-code-assist

* Add log filter status visualization feature (#466)

* Add TimelineChart component (#467)

* Adds timeline-chart Component

* Removed the obsoleted comment

* Add the hover component on timeline chart shown when user mouse is over (#468)

* Add the hover component on timeline chart shown when user mouse is over

* fix suggested by gemini-code-assist

* Added scroll interaction on the ruler & minor style improvement (#469)

* Added scroll interaction on the ruler & minor style improvement

* fix issue pointed by gemini-code-assist

* Add TimelineFrameComponent (#470)

* Add TimelineFrameComponent

This component is a virtually scrollable components embeds its children timeline related components.

* added missing change on the PR

* Fixed scroll caluclation bug

* Replace current timeline with the timeline component (#471)

* Add TimelineFrameComponent

This component is a virtually scrollable components embeds its children timeline related components.

* added missing change on the PR

* Fixed scroll caluclation bug

* Implemented TimelineSmartComponent and replace the current timeline component

This is the component only for injecting props from Services.

* Removed unused shaders

* Add a missing file

* Fix minor style problems (#472)

* Add TimelineFrameComponent

This component is a virtually scrollable components embeds its children timeline related components.

* Fixed scroll caluclation bug

* Fixed several minor style issues to prepare release

* fix z-index style issue and emphasized the time cursor

---------

Signed-off-by: kyasbal <kyasbal1994@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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