@doegis/core
Version:
DOE GIS API
3 lines (1 loc) • 917 B
JavaScript
import{ObservableValue as t}from"../../../core/accessorSupport/tracking/ObservableValue.js";import{InputHandler as e}from"../InputHandler.js";class i extends e{get multiTouchActive(){return this._multiTouchActive.get()}constructor(){super(!0),this._activeTouchPointerIds=new Set,this._multiTouchActive=new t(!1),this._onPointerAdd=({data:t})=>{"touch"===t.pointerType&&(this._activeTouchPointerIds.add(t.native.pointerId),this._update())},this._onPointerRemove=({data:t})=>{"touch"===t.pointerType&&(this._activeTouchPointerIds.delete(t.native.pointerId),this._update())},this.registerIncoming("pointer-down",this._onPointerAdd),this.registerIncoming("pointer-up",this._onPointerRemove),this.registerIncoming("pointer-capture-lost",this._onPointerRemove),this.registerIncoming("pointer-cancel",this._onPointerRemove)}_update(){this._multiTouchActive.set(this._activeTouchPointerIds.size>1)}}export{i as MultiTouch};