@doegis/core
Version:
DOE GIS API
3 lines (1 loc) • 1.05 kB
JavaScript
import"../../../../core/has.js";import{InputHandler as t}from"../../../input/InputHandler.js";class e extends t{constructor(t,e,a){super(!0),this.view=t,this.pointerType=e,this.registerIncoming("double-tap-drag",a,(t=>this._handleDoubleTapDrag(t)))}_handleDoubleTapDrag(t){const{data:e}=t,{pointerType:a}=e;if(a!==this.pointerType)return;t.stopPropagation();const{action:s,delta:i}=e,{view:r}=this,{mapViewNavigation:n}=r;switch(s){case"begin":{const{scale:t}=r;this._startScale=t,this._currentScale=t,this._previousDelta=i,n.begin();break}case"update":{if(this._previousDelta.y===i.y)return;this._previousDelta=i;const t=1.015**i.y,e=this._startScale*t,a=e/this._currentScale;n.setViewpointImmediate(a),this._currentScale=e;break}case"end":{const{constraints:t}=r,{effectiveLODs:e,snapToZoom:a}=t;if(!a||!e)return void n.end();const s=t.snapScale(this._currentScale),o=(i.y>0?Math.max(s,t.snapToPreviousScale(this._startScale)):Math.min(s,t.snapToNextScale(this._startScale)))/this._currentScale;n.zoom(o);break}}}}export{e as DoubleTapDragZoom};