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