Ability to provide callback to get measurements

uber · Nov 25, 2019 · ed8e31a · ed8e31a
1 parent 98ef045
commit ed8e31a
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diff --git a/docs/api-reference/modes/overview.md b/docs/api-reference/modes/overview.md
@@ -149,6 +149,10 @@ The following options can be provided in the `modeConfig` object:
   * Function to format tooltip text (argument is the numeric distance)
   * Default: `(distance) => parseFloat(distance).toFixed(2) + units`
 
+* `measurementCallback` (Function, optional)
+  * Function to call as measurements are calculated
+  * Default: `undefined`
+
 ## [ElevationMode](https://github.com/uber/nebula.gl/blob/master/modules/edit-modes/src/lib/elevation-mode.js)
 
 User can move a point up and down.

diff --git a/modules/edit-modes/src/lib/measure-distance-mode.js b/modules/edit-modes/src/lib/measure-distance-mode.js
@@ -38,7 +38,7 @@ export class MeasureDistanceMode extends BaseGeoJsonEditMode {
     let tooltips = DEFAULT_TOOLTIPS;
 
     if (startingPoint && endingPoint) {
-      const { formatTooltip, turfOptions } = modeConfig || {};
+      const { formatTooltip, turfOptions, measurementCallback } = modeConfig || {};
       const units = (turfOptions && turfOptions.units) || 'kilometers';
 
       const distance = turfDistance(startingPoint, endingPoint, turfOptions);
@@ -52,6 +52,10 @@ export class MeasureDistanceMode extends BaseGeoJsonEditMode {
         text = `${parseFloat(distance).toFixed(2)} ${units}`;
       }
 
+      if (measurementCallback) {
+        measurementCallback(distance);
+      }
+
       tooltips = [
         {
           position: endingPoint.geometry.coordinates,