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 {HighPrecisionTime} from '../../base/high_precision_time'; 15import {HighPrecisionTimeSpan} from '../../base/high_precision_time_span'; 16import {TimeScale} from '../../base/time_scale'; 17 18export type DragStrategyUpdateTimeFn = (ts: HighPrecisionTimeSpan) => void; 19 20export abstract class DragStrategy { 21 constructor( 22 protected map: TimeScale, 23 private updateVizTime: DragStrategyUpdateTimeFn, 24 ) {} 25 26 abstract onDrag(x: number): void; 27 28 abstract onDragStart(x: number): void; 29 30 protected updateGlobals(tStart: HighPrecisionTime, tEnd: HighPrecisionTime) { 31 const vizTime = new HighPrecisionTimeSpan( 32 tStart, 33 tEnd.sub(tStart).toNumber(), 34 ); 35 this.updateVizTime(vizTime); 36 } 37} 38