| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 2015 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="/ui/annotations/annotation_view.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.ui.annotations', function() { |
| /** |
| * A view responsible for drawing a single highlight rectangle box on |
| * the timeline. |
| * @extends {AnnotationView} |
| * @constructor |
| */ |
| function RectAnnotationView(viewport, annotation) { |
| this.viewport_ = viewport; |
| this.annotation_ = annotation; |
| } |
| |
| RectAnnotationView.prototype = { |
| __proto__: tr.ui.annotations.AnnotationView.prototype, |
| |
| draw: function(ctx) { |
| var dt = this.viewport_.currentDisplayTransform; |
| var startCoords = |
| this.annotation_.startLocation.toViewCoordinates(this.viewport_); |
| var endCoords = |
| this.annotation_.endLocation.toViewCoordinates(this.viewport_); |
| |
| // Prevent drawing into the ruler track by clamping the initial Y |
| // point and the rect's Y size. |
| var startY = startCoords.viewY - ctx.canvas.getBoundingClientRect().top; |
| var sizeY = endCoords.viewY - startCoords.viewY; |
| if (startY + sizeY < 0) { |
| // In this case sizeY is negative. If final Y is negative, |
| // overwrite startY so that the rectangle ends at y=0. |
| startY = sizeY; |
| } else if (startY < 0) { |
| startY = 0; |
| } |
| |
| ctx.fillStyle = this.annotation_.fillStyle; |
| ctx.fillRect(startCoords.viewX, startY, |
| endCoords.viewX - startCoords.viewX, sizeY); |
| } |
| }; |
| |
| return { |
| RectAnnotationView: RectAnnotationView |
| }; |
| }); |
| </script> |
