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Is there a way to have a selectInteraction in OpenLayers 3 that only allows one feature to be selected at a time?

Jose Gómez
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Tyler DeWitt
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3 Answers3

14

define select interaction as follow:

select = new ol.interaction.Select (
    toggleCondition: ol.events.condition.never
)
Morteza Malvandi
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Paul
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    Fix the answer, it should be `select = new ol.interaction.Select ({ toggleCondition: ol.events.condition.never })` – Thomas Gratier Jan 23 '17 at 14:01
  • If anyone is using VueLayers, I got this to work by putting `import { never } from 'ol/events/condition'` at the top of the scrpt and then defining it in the `data` block as `never` and then specifying `:toggle-condition="never"` in the `` component. – wfgeo Mar 29 '22 at 12:39
2

Not really sure I understood well.

If you go to the API doc for OpenLayers 3.4 and untick Stable Only on the page top right, you will see a multi option to manage this. Normally, according to the doc, what you are asking is already by default.

Multi A boolean that determines if the default behaviour should select only single features or all (overlapping) features at the clicked map position. Default is false i.e single select

Thomas Gratier
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    Sorry for the confusion. The `multi` option is for selecting multiple features with one click. I want to turn off the ability to hold the `shift` key and select multiple features. – Tyler DeWitt May 04 '15 at 13:41
1

For OpenLayers4 this can easily be done by combining conditions.

For example a condition that only selects on singleClick and not when shiftKey is pressed: 

const select = new Select({
  condition: (mapBrowserEvent) => {
    return singleClick(mapBrowserEvent) && !shiftKeyOnly(mapBrowserEvent)},
  layers: [layer]
});

Find more conditions in the API doc: http://openlayers.org/en/latest/apidoc/module-ol_events_condition.html

Ludvik Brodl
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