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