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 {TimeSpan} from '../../common/time'; 15import {globals} from '../globals'; 16import {TimeScale} from '../time_scale'; 17 18export abstract class DragStrategy { 19 constructor(protected timeScale: TimeScale) {} 20 21 abstract onDrag(x: number): void; 22 23 abstract onDragStart(x: number): void; 24 25 protected updateGlobals(tStart: number, tEnd: number) { 26 const vizTime = new TimeSpan(tStart, tEnd); 27 globals.frontendLocalState.updateVisibleTime(vizTime); 28 globals.rafScheduler.scheduleRedraw(); 29 } 30} 31