| Chris Craik | b122baf | 2015-03-05 13:58:42 -0800 | [diff] [blame] | 1 | <!DOCTYPE html> |
| 2 | <!-- |
| 3 | Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| 4 | Use of this source code is governed by a BSD-style license that can be |
| 5 | found in the LICENSE file. |
| 6 | --> |
| 7 | |
| 8 | <link rel="import" href="/base/range.html"> |
| 9 | |
| 10 | <script> |
| 11 | 'use strict'; |
| 12 | |
| 13 | tv.exportTo('tv.c', function() { |
| 14 | /** |
| 15 | * @constructor |
| 16 | */ |
| 17 | function SnapIndicator(y, height) { |
| 18 | this.y = y; |
| 19 | this.height = height; |
| 20 | } |
| 21 | |
| 22 | /** |
| 23 | * The interesting part of the world. |
| 24 | * |
| 25 | * @constructor |
| 26 | */ |
| 27 | function TimelineInterestRange(vp) { |
| 28 | this.viewport_ = vp; |
| 29 | |
| 30 | this.range_ = new tv.b.Range(); |
| 31 | |
| 32 | this.leftSelected_ = false; |
| 33 | this.rightSelected_ = false; |
| 34 | |
| 35 | this.leftSnapIndicator_ = undefined; |
| 36 | this.rightSnapIndicator_ = undefined; |
| 37 | } |
| 38 | |
| 39 | TimelineInterestRange.prototype = { |
| 40 | get isEmpty() { |
| 41 | return this.range_.isEmpty; |
| 42 | }, |
| 43 | |
| 44 | reset: function() { |
| 45 | this.range_.reset(); |
| 46 | this.leftSelected_ = false; |
| 47 | this.rightSelected_ = false; |
| 48 | this.leftSnapIndicator_ = undefined; |
| 49 | this.rightSnapIndicator_ = undefined; |
| 50 | this.viewport_.dispatchChangeEvent(); |
| 51 | }, |
| 52 | |
| 53 | get min() { |
| 54 | return this.range_.min; |
| 55 | }, |
| 56 | |
| 57 | set min(min) { |
| 58 | this.range_.min = min; |
| 59 | this.viewport_.dispatchChangeEvent(); |
| 60 | }, |
| 61 | |
| 62 | get max() { |
| 63 | return this.range_.max; |
| 64 | }, |
| 65 | |
| 66 | set max(max) { |
| 67 | this.range_.max = max; |
| 68 | this.viewport_.dispatchChangeEvent(); |
| 69 | }, |
| 70 | |
| 71 | set: function(range) { |
| 72 | this.range_.reset(); |
| 73 | this.range_.addRange(range); |
| 74 | this.viewport_.dispatchChangeEvent(); |
| 75 | }, |
| 76 | |
| 77 | setMinAndMax: function(min, max) { |
| 78 | this.range_.min = min; |
| 79 | this.range_.max = max; |
| 80 | this.viewport_.dispatchChangeEvent(); |
| 81 | }, |
| 82 | |
| 83 | get range() { |
| 84 | return this.range_.range; |
| 85 | }, |
| 86 | |
| 87 | asRangeObject: function() { |
| 88 | var range = new tv.b.Range(); |
| 89 | range.addRange(this.range_); |
| 90 | return range; |
| 91 | }, |
| 92 | |
| 93 | get leftSelected() { |
| 94 | return this.leftSelected_; |
| 95 | }, |
| 96 | |
| 97 | set leftSelected(leftSelected) { |
| 98 | if (this.leftSelected_ == leftSelected) |
| 99 | return; |
| 100 | this.leftSelected_ = leftSelected; |
| 101 | this.viewport_.dispatchChangeEvent(); |
| 102 | }, |
| 103 | |
| 104 | get rightSelected() { |
| 105 | return this.rightSelected_; |
| 106 | }, |
| 107 | |
| 108 | set rightSelected(rightSelected) { |
| 109 | if (this.rightSelected_ == rightSelected) |
| 110 | return; |
| 111 | this.rightSelected_ = rightSelected; |
| 112 | this.viewport_.dispatchChangeEvent(); |
| 113 | }, |
| 114 | |
| 115 | get leftSnapIndicator() { |
| 116 | return this.leftSnapIndicator_; |
| 117 | }, |
| 118 | |
| 119 | set leftSnapIndicator(leftSnapIndicator) { |
| 120 | this.leftSnapIndicator_ = leftSnapIndicator; |
| 121 | this.viewport_.dispatchChangeEvent(); |
| 122 | }, |
| 123 | |
| 124 | get rightSnapIndicator() { |
| 125 | return this.rightSnapIndicator_; |
| 126 | }, |
| 127 | |
| 128 | set rightSnapIndicator(rightSnapIndicator) { |
| 129 | this.rightSnapIndicator_ = rightSnapIndicator; |
| 130 | this.viewport_.dispatchChangeEvent(); |
| 131 | }, |
| 132 | |
| 133 | draw: function(ctx, viewLWorld, viewRWorld) { |
| 134 | if (this.range_.isEmpty) |
| 135 | return; |
| 136 | var dt = this.viewport_.currentDisplayTransform; |
| 137 | |
| 138 | var markerLWorld = this.min; |
| 139 | var markerRWorld = this.max; |
| 140 | |
| 141 | var markerLView = Math.round(dt.xWorldToView(markerLWorld)); |
| 142 | var markerRView = Math.round(dt.xWorldToView(markerRWorld)); |
| 143 | |
| 144 | ctx.fillStyle = 'rgba(0, 0, 0, 0.2)'; |
| 145 | if (markerLWorld > viewLWorld) { |
| 146 | ctx.fillRect(dt.xWorldToView(viewLWorld), 0, |
| 147 | markerLView, ctx.canvas.height); |
| 148 | } |
| 149 | |
| 150 | if (markerRWorld < viewRWorld) { |
| 151 | ctx.fillRect(markerRView, 0, |
| 152 | dt.xWorldToView(viewRWorld), ctx.canvas.height); |
| 153 | } |
| 154 | |
| 155 | var pixelRatio = window.devicePixelRatio || 1; |
| 156 | ctx.lineWidth = Math.round(pixelRatio); |
| 157 | if (this.range_.range > 0) { |
| 158 | this.drawLine_(ctx, viewLWorld, viewRWorld, |
| 159 | ctx.canvas.height, this.min, this.leftSelected_); |
| 160 | this.drawLine_(ctx, viewLWorld, viewRWorld, |
| 161 | ctx.canvas.height, this.max, this.rightSelected_); |
| 162 | } else { |
| 163 | this.drawLine_(ctx, viewLWorld, viewRWorld, |
| 164 | ctx.canvas.height, this.min, |
| 165 | this.leftSelected_ || this.rightSelected_); |
| 166 | } |
| 167 | ctx.lineWidth = 1; |
| 168 | }, |
| 169 | |
| 170 | drawLine_: function(ctx, viewLWorld, viewRWorld, height, ts, selected) { |
| 171 | if (ts < viewLWorld || ts >= viewRWorld) |
| 172 | return; |
| 173 | |
| 174 | var dt = this.viewport_.currentDisplayTransform; |
| 175 | var viewX = Math.round(dt.xWorldToView(ts)); |
| 176 | |
| 177 | // Apply subpixel translate to get crisp lines. |
| 178 | // http://www.mobtowers.com/html5-canvas-crisp-lines-every-time/ |
| 179 | ctx.save(); |
| 180 | ctx.translate((Math.round(ctx.lineWidth) % 2) / 2, 0); |
| 181 | |
| 182 | ctx.beginPath(); |
| 183 | tv.c.drawLine(ctx, viewX, 0, viewX, height); |
| 184 | if (selected) |
| 185 | ctx.strokeStyle = 'rgb(255, 0, 0)'; |
| 186 | else |
| 187 | ctx.strokeStyle = 'rgb(0, 0, 0)'; |
| 188 | ctx.stroke(); |
| 189 | |
| 190 | ctx.restore(); |
| 191 | }, |
| 192 | |
| 193 | drawIndicators: function(ctx, viewLWorld, viewRWorld) { |
| 194 | if (this.leftSnapIndicator_) { |
| 195 | this.drawIndicator_(ctx, viewLWorld, viewRWorld, |
| 196 | this.range_.min, |
| 197 | this.leftSnapIndicator_, |
| 198 | this.leftSelected_); |
| 199 | } |
| 200 | if (this.rightSnapIndicator_) { |
| 201 | this.drawIndicator_(ctx, viewLWorld, viewRWorld, |
| 202 | this.range_.max, |
| 203 | this.rightSnapIndicator_, |
| 204 | this.rightSelected_); |
| 205 | } |
| 206 | }, |
| 207 | |
| 208 | drawIndicator_: function(ctx, viewLWorld, viewRWorld, |
| 209 | xWorld, si, selected) { |
| 210 | var dt = this.viewport_.currentDisplayTransform; |
| 211 | |
| 212 | var viewX = Math.round(dt.xWorldToView(xWorld)); |
| 213 | |
| 214 | // Apply subpixel translate to get crisp lines. |
| 215 | // http://www.mobtowers.com/html5-canvas-crisp-lines-every-time/ |
| 216 | ctx.save(); |
| 217 | ctx.translate((Math.round(ctx.lineWidth) % 2) / 2, 0); |
| 218 | |
| 219 | var pixelRatio = window.devicePixelRatio || 1; |
| 220 | var viewY = si.y * devicePixelRatio; |
| 221 | var viewHeight = si.height * devicePixelRatio; |
| 222 | var arrowSize = 4 * pixelRatio; |
| 223 | |
| 224 | if (selected) |
| 225 | ctx.fillStyle = 'rgb(255, 0, 0)'; |
| 226 | else |
| 227 | ctx.fillStyle = 'rgb(0, 0, 0)'; |
| 228 | tv.c.drawTriangle(ctx, |
| 229 | viewX - arrowSize * 0.75, viewY, |
| 230 | viewX + arrowSize * 0.75, viewY, |
| 231 | viewX, viewY + arrowSize); |
| 232 | ctx.fill(); |
| 233 | tv.c.drawTriangle(ctx, |
| 234 | viewX - arrowSize * 0.75, viewY + viewHeight, |
| 235 | viewX + arrowSize * 0.75, viewY + viewHeight, |
| 236 | viewX, viewY + viewHeight - arrowSize); |
| 237 | ctx.fill(); |
| 238 | |
| 239 | ctx.restore(); |
| 240 | } |
| 241 | }; |
| 242 | |
| 243 | return { |
| 244 | SnapIndicator: SnapIndicator, |
| 245 | TimelineInterestRange: TimelineInterestRange |
| 246 | }; |
| 247 | }); |
| 248 | </script> |