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