1// Copyright (C) 2021 The Android Open Source Project 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14import {DragStrategy} from './drag_strategy'; 15 16export class OuterDragStrategy extends DragStrategy { 17 private dragStartPx = 0; 18 19 onDrag(x: number) { 20 const dragBeginTime = this.timeScale.pxToTime(this.dragStartPx); 21 const dragEndTime = this.timeScale.pxToTime(x); 22 const tStart = Math.min(dragBeginTime, dragEndTime); 23 const tEnd = Math.max(dragBeginTime, dragEndTime); 24 super.updateGlobals(tStart, tEnd); 25 } 26 27 onDragStart(x: number) { 28 this.dragStartPx = x; 29 } 30}