Description

Add minscale and maxscale attributes to geo plots. These set the min and max scale extents for a plot (how far a user can zoom out/in). This PR supersedes #5192 which will be closed after this is merged.

• Resolves allow user to set zoom/scale limits for choropleth maps #5191
• Closes add support for min/max scale limits #5192

Changes

• Adds minscale and maxscale attributes to geo plots. Defaults are 0 and -1, respectively.
• Enforces scale extents on zoom mouse events, mode bar button clicks
• Manually creates zoom event to enforce scale extents on first render (treating the middle of the plot as the zoom point)

Demo Video or Screenshot(s):

Before:

Screencast.From.2025-02-22.11-25-20.mp4

After:

Screencast.From.2025-02-22.11-29-21.mp4

Testing

• Start the dev dasard with npm start
• Search for a geo mock and load it (I used geo_legendonly)
• Zoom in and out and note how you can go as far as you want in either direction
• Edit the mock file and add the following attributes under the "geo" key
  • "minscale": 2
  • "maxscale": 4
• Reload the mock in the dasard
• Note that the mock appears zoomed in upon first load
• Zoom in and out and note how you're now limited in how far you can go

I believe that some tests are failing because there's now an extra zoom event on every call to updateFx (for dragMode === 'pan'). I think I need to restrict that call to only happen upon first load. I'll keep looking into it.