feat: add support for drawing many features on the same map #466
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| sketch.set("area", formatArea(sketchGeom, this.areaUnit)); | ||
| } | ||
| }); | ||
| } |
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This is breaking change areaChange event when drawing polygons, this proposes simply setting area within the geojson properties and dispatching the single geojsonChange event.
A couple benefits:
- Scales much more nicely between draw-one and draw-many, naturally accounts for extra
labelproperty too - End consumers only have to subscribe to a single thing and just parse different data from it
- I can't think of any current use cases where you'd only subscribe to an
areaChangeand not care about the wholegeojsonChange??
Any objections or alternative ideas?
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Yeah this is super interesting. I think that this approach will work well and suit our requirements - I can't really think of an issue here.
Right now we just need the general concept of a change event, and don't really need granular details (e.g. to inform a consumer that the area property of feature 14 have updated). It's enough to say there's been an update to the FeatureCollection as a whole, and it will need to be updated. It's possible that in the future this could be required (seems unlikely and parsable by consumers anyway?), but for now a single "change" event is a lot simpler and meets all requirements 👍
| sketch.set("area", formatArea(sketchGeom, this.areaUnit)); | ||
| } | ||
| }); | ||
| } |
There was a problem hiding this comment.
Yeah this is super interesting. I think that this approach will work well and suit our requirements - I can't really think of an issue here.
Right now we just need the general concept of a change event, and don't really need granular details (e.g. to inform a consumer that the area property of feature 14 have updated). It's enough to say there's been an update to the FeatureCollection as a whole, and it will need to be updated. It's possible that in the future this could be required (seems unlikely and parsable by consumers anyway?), but for now a single "change" event is a lot simpler and meets all requirements 👍
Changes:
drawManyprop which has default valuefalsedrawType"Polygon" or "Point"drawManyis true (label text is auto-index)geojsonChangeevent to setpropertieslabelwill match visual text on map for anydrawTypeareareplaces previously separateareaChangeevent whendrawType="Polygon"- see commentindex.ts- sorry for extra noise!Future scope / follow-up PRs: