support a null pointer to check isTouchLike, phetsims/scenery#1156

phetsims · Feb 17, 2021 · 5b3601a · 5b3601a
1 parent ef74003
commit 5b3601a
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/js/charges-and-fields/view/ChargedParticleNode.js b/js/charges-and-fields/view/ChargedParticleNode.js
@@ -59,7 +59,7 @@ class ChargedParticleNode extends ChargedParticleRepresentationNode {
       transform: modelViewTransform,
       canStartPress: () => !chargedParticle.animationTween,
       offsetPosition: ( point, listener ) => {
-        return listener.pointer.isTouchLike() ? new Vector2( 0, -2 * CIRCLE_RADIUS ) : Vector2.ZERO;
+        return listener.pointer && listener.pointer.isTouchLike() ? new Vector2( 0, -2 * CIRCLE_RADIUS ) : Vector2.ZERO;
       },
       start: ( event, listener ) => {
         // Move the chargedParticle to the front of this layer when grabbed by the user.

diff --git a/js/charges-and-fields/view/ElectricFieldSensorNode.js b/js/charges-and-fields/view/ElectricFieldSensorNode.js
@@ -193,7 +193,7 @@ class ElectricFieldSensorNode extends ElectricFieldSensorRepresentationNode {
       transform: modelViewTransform,
       canStartPress: () => !electricFieldSensor.animationTween,
       offsetPosition: ( point, listener ) => {
-        return listener.pointer.isTouchLike() ? new Vector2( 0, -2 * ChargesAndFieldsConstants.ELECTRIC_FIELD_SENSOR_CIRCLE_RADIUS ) : Vector2.ZERO;
+        return listener.pointer && listener.pointer.isTouchLike() ? new Vector2( 0, -2 * ChargesAndFieldsConstants.ELECTRIC_FIELD_SENSOR_CIRCLE_RADIUS ) : Vector2.ZERO;
       },
       start: ( event, listener ) => {
         // Move the sensor to the front of this layer when grabbed by the user.