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Do not set center when touches count has changed

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This commit is contained in:
Andreas Hocevar
2017-02-13 22:30:51 +01:00
parent 0c159cf0f7
commit 8e35b7a1ad
1 changed files with 9 additions and 2 deletions
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src/ol/interaction/dragpan.js
+9 -2
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@@ -39,6 +39,11 @@ ol.interaction.DragPan = function(opt_options) {
*/ */
this.lastCentroid = null; this.lastCentroid = null;
/**
* @type {number}
*/
this.lastPointersCount_;
/** /**
* @private * @private
* @type {ol.EventsConditionType} * @type {ol.EventsConditionType}
@@ -62,12 +67,13 @@ ol.inherits(ol.interaction.DragPan, ol.interaction.Pointer);
* @private * @private
*/ */
ol.interaction.DragPan.handleDragEvent_ = function(mapBrowserEvent) { ol.interaction.DragPan.handleDragEvent_ = function(mapBrowserEvent) {
var targetPointers = this.targetPointers;
var centroid = var centroid =
ol.interaction.Pointer.centroid(this.targetPointers); ol.interaction.Pointer.centroid(targetPointers);
if (this.kinetic_) { if (this.kinetic_) {
this.kinetic_.update(centroid[0], centroid[1]); this.kinetic_.update(centroid[0], centroid[1]);
} }
if (this.lastCentroid) { if (this.lastCentroid && targetPointers.length == this.lastPointersCount_) {
var deltaX = this.lastCentroid[0] - centroid[0]; var deltaX = this.lastCentroid[0] - centroid[0];
var deltaY = centroid[1] - this.lastCentroid[1]; var deltaY = centroid[1] - this.lastCentroid[1];
var map = mapBrowserEvent.map; var map = mapBrowserEvent.map;
@@ -81,6 +87,7 @@ ol.interaction.DragPan.handleDragEvent_ = function(mapBrowserEvent) {
view.setCenter(center); view.setCenter(center);
} }
this.lastCentroid = centroid; this.lastCentroid = centroid;
this.lastPointersCount_ = targetPointers.length;
}; };