1// Copyright (C) 2019 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. 14 15import {time} from '../base/time'; 16 17import {TRACK_SHELL_WIDTH} from './css_constants'; 18import {TimeScale} from './time_scale'; 19 20export function drawVerticalLineAtTime( 21 ctx: CanvasRenderingContext2D, 22 timeScale: TimeScale, 23 time: time, 24 height: number, 25 color: string, 26 lineWidth = 2, 27) { 28 const xPos = TRACK_SHELL_WIDTH + Math.floor(timeScale.timeToPx(time)); 29 drawVerticalLine(ctx, xPos, height, color, lineWidth); 30} 31 32function drawVerticalLine( 33 ctx: CanvasRenderingContext2D, 34 xPos: number, 35 height: number, 36 color: string, 37 lineWidth = 2, 38) { 39 ctx.beginPath(); 40 ctx.strokeStyle = color; 41 const prevLineWidth = ctx.lineWidth; 42 ctx.lineWidth = lineWidth; 43 ctx.moveTo(xPos, 0); 44 ctx.lineTo(xPos, height); 45 ctx.stroke(); 46 ctx.closePath(); 47 ctx.lineWidth = prevLineWidth; 48} 49