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 {TimeScale} from '../time_scale'; 15import {DragStrategy} from './drag_strategy'; 16 17export class InnerDragStrategy extends DragStrategy { 18 private dragStartPx = 0; 19 20 constructor(timeScale: TimeScale, private pixelBounds: [number, number]) { 21 super(timeScale); 22 } 23 24 onDrag(x: number) { 25 const move = x - this.dragStartPx; 26 const tStart = this.timeScale.pxToTime(this.pixelBounds[0] + move); 27 const tEnd = this.timeScale.pxToTime(this.pixelBounds[1] + move); 28 super.updateGlobals(tStart, tEnd); 29 } 30 31 onDragStart(x: number) { 32 this.dragStartPx = x; 33 } 34} 35