feat(country-map): add cross-filters support

[imad-hl]

User description

SUMMARY

This PR adds cross-filters support to the legacy CountryMap plugin with some changes to the map interaction UX:

• Clicking on a region now triggers cross-filtering instead of zooming in by default.
• Added multi-select support using Shift + Click (toggle regions).
  Note: While this behavior is not present in other Superset charts, I found it helpful. I welcome guidance from reviewers on whether to keep it or remove it for consistency.
• Selected regions are highlighted, while non-selected ones are faded.
• Zooming and panning are now handled via mouse wheel or trackpad.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• [X] Has associated issue: Fixes #33772
• [ ] Required feature flags
• [X] Changes UI
• [ ] Includes DB Migration (follow approval process in SIP-59)
  • [ ] Migration is atomic, supports rollback & is backwards-compatible
  • [ ] Confirm DB migration upgrade and downgrade tested
  • [ ] Runtime estimates and downtime expectations provided
• [ ] Introduces new feature or API
• [ ] Removes existing feature or API

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CodeAnt-AI Description

Enable cross-filtering and drill actions on the Country Map chart

What Changed

• Clicking a region now selects it and applies cross-filters to linked charts instead of zooming the map
• Users can select or clear multiple regions with Shift+click, with selected areas highlighted and non-selected areas faded
• Right-clicking a region opens the drill menu with drill-to-detail, drill-by, and cross-filter options when available
• Map zooming and panning now use scroll/trackpad with bounded movement and preserve the current view when the chart refreshes
• Regions without data now show in a neutral gray rather than disappearing, and hover labels and values are more readable
• The chart handles missing configuration and interaction data more safely, reducing cases where the country map fails to render

Impact

✅ Faster cross-filter exploration from maps ✅ Clearer selection feedback on country maps ✅ Fewer country map render failures

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[korbit-ai[bot]]

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[rusackas]

Looks like there are some typescript issues to fix. You might fix some by running npm run plugins:build on the frontend.

[imad-hl]

Looks like there are some typescript issues to fix. You might fix some by running npm run plugins:build on the frontend.

Hi @rusackas

Thanks for reviewing! I ran npm run plugins:build locally and the Country Map plugin seems to compile successfully. apart from some babel warnings :

@superset-ui/legacy-plugin-chart-country-map: `isModuleDeclaration` has been deprecated, please migrate to `isImportOrExportDeclaration`
@superset-ui/legacy-plugin-chart-country-map:     at isModuleDeclaration (/app/superset-frontend/node_modules/@babel/types/lib/validators/generated/index.js:2793:35)
@superset-ui/legacy-plugin-chart-country-map:     at PluginPass.Program (/app/superset-frontend/node_modules/babel-plugin-lodash/lib/index.js:102:44)

The type script errors seems to come from other plugins (plugin-chart-echarts) , I rebased my branch on the latest master, hope it helps

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[rusackas]

Re-running CI, let's see how it goes! 🤞

That said, there are still a lot of Copilot suggestions, if you don't mind addressing them (leaving a comment if they're irrelevant/wrong, or addressing them if they're on the right track).

[imad-hl]

Re-running CI, let's see how it goes! 🤞

That said, there are still a lot of Copilot suggestions, if you don't mind addressing them (leaving a comment if they're irrelevant/wrong, or addressing them if they're on the right track).

I've addressed the Copilot suggestions in commit 9651b63 hence why they show as "outdated". but I'll go through each one and add comments explaining the implemented solution

[rusackas]

Code LGTM, I just want to test before merging. Ephemeral environments are busted at the moment, so it's in my backlog of things to checkout / build / run / test :)

[github-actions[bot]]

🎪 Showtime is building environment on GHA for d818e4a

[github-actions[bot]]

🎪 Showtime deployed environment on GHA for d818e4a

• Environment: http://34.222.53.98:8080 (admin/admin) • Lifetime: 48h auto-cleanup • Updates: New commits create fresh environments automatically

[github-actions[bot]]

🎪 Showtime is building environment on GHA for d818e4a

[github-actions[bot]]

🎪 Showtime deployed environment on GHA for d818e4a

• Environment: http://52.35.39.226:8080 (admin/admin) • Lifetime: 48h auto-cleanup • Updates: New commits create fresh environments automatically

[rusackas]

Eek... some conflicts have arisen due to another recently merged PR. Could you take a look at rebasing? Hope I didn't cause too much trouble.

Otherwise, I think the shift-click thing is a little... unusual... but I don't mind it all that much. It's hard to discover, so a docs entry couldn't hurt, OR adapting this to other cross-filter-emitting charts like Pie Charts or Bar Charts. That'd be cool, unless there's a better, more visibly obvious pattern here (@kasiazjc might have ideas).

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CodeAnt AI is running Incremental review

[imad-hl]

Eek... some conflicts have arisen due to another recently merged PR. Could you take a look at rebasing? Hope I didn't cause too much trouble.

Otherwise, I think the shift-click thing is a little... unusual... but I don't mind it all that much. It's hard to discover, so a docs entry couldn't hurt, OR adapting this to other cross-filter-emitting charts like Pie Charts or Bar Charts. That'd be cool, unless there's a better, more visibly obvious pattern here (@kasiazjc might have ideas).

Hi! I think I got the conflicts sorted out. The recently merged PR added a nice tooltip feature on hover, which is now integrated. About the shift-click multiselect : I agree it's not very discoverable. I've removed it and simplified the behavior to match what other cross-filter charts do (Pie, Bar, etc.).

I do think shift-multiselect could be a good addition if implemented consistently across all cross-filter charts, but for this PR I'll stick with removing it and keeping things aligned with the existing patterns.

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