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| 1 // | |
| 2 // Copyright 2014 Google Inc. All rights reserved. | |
| 3 // | |
| 4 // Use of this source code is governed by a BSD-style | |
| 5 // license that can be found in the LICENSE file or at | |
| 6 // https://developers.google.com/open-source/licenses/bsd | |
| 7 // | |
| 8 | |
| 9 part of charted.charts; | |
| 10 | |
| 11 /// Displays either one or two dimension axes and zero or more measure axis. | |
| 12 /// The number of measure axes displayed is zero in charts like bubble chart | |
| 13 /// which contain two dimension axes. | |
| 14 class DefaultCartesianAreaImpl implements CartesianArea { | |
| 15 /// Default identifiers used by the measure axes | |
| 16 static const MEASURE_AXIS_IDS = const['_default']; | |
| 17 | |
| 18 /// Orientations used by measure axes. First, when "x" axis is the primary | |
| 19 /// and the only dimension. Second, when "y" axis is the primary and the only | |
| 20 /// dimension. | |
| 21 static const MEASURE_AXIS_ORIENTATIONS = const[ | |
| 22 const[ORIENTATION_LEFT, ORIENTATION_RIGHT], | |
| 23 const[ORIENTATION_BOTTOM, ORIENTATION_TOP] | |
| 24 ]; | |
| 25 | |
| 26 /// Orientations used by the dimension axes. First, when "x" is the | |
| 27 /// primary dimension and the last one for cases where "y" axis is primary | |
| 28 /// dimension. | |
| 29 static const DIMENSION_AXIS_ORIENTATIONS = const[ | |
| 30 const[ORIENTATION_BOTTOM, ORIENTATION_LEFT], | |
| 31 const[ORIENTATION_LEFT, ORIENTATION_BOTTOM] | |
| 32 ]; | |
| 33 | |
| 34 /// Mapping of measure axis Id to it's axis. | |
| 35 final _measureAxes = new LinkedHashMap<String, DefaultChartAxisImpl>(); | |
| 36 | |
| 37 /// Mapping of dimension column index to it's axis. | |
| 38 final _dimensionAxes = new LinkedHashMap<int, DefaultChartAxisImpl>(); | |
| 39 | |
| 40 /// Disposer for all change stream subscriptions related to data. | |
| 41 final _dataEventsDisposer = new SubscriptionsDisposer(); | |
| 42 | |
| 43 /// Disposer for all change stream subscriptions related to config. | |
| 44 final _configEventsDisposer = new SubscriptionsDisposer(); | |
| 45 | |
| 46 @override | |
| 47 final Element host; | |
| 48 | |
| 49 @override | |
| 50 final bool useTwoDimensionAxes; | |
| 51 | |
| 52 @override | |
| 53 final bool useRowColoring; | |
| 54 | |
| 55 /// Indicates whether any renderers need bands on primary dimension | |
| 56 final List<int> dimensionsUsingBands = []; | |
| 57 | |
| 58 @override | |
| 59 final ChartState state; | |
| 60 | |
| 61 @override | |
| 62 _ChartAreaLayout layout = new _ChartAreaLayout(); | |
| 63 | |
| 64 @override | |
| 65 Selection upperBehaviorPane; | |
| 66 | |
| 67 @override | |
| 68 Selection lowerBehaviorPane; | |
| 69 | |
| 70 @override | |
| 71 bool isReady = false; | |
| 72 | |
| 73 @override | |
| 74 ChartTheme theme; | |
| 75 | |
| 76 ChartData _data; | |
| 77 ChartConfig _config; | |
| 78 bool _autoUpdate = false; | |
| 79 | |
| 80 SelectionScope _scope; | |
| 81 Selection _svg; | |
| 82 Selection visualization; | |
| 83 | |
| 84 Iterable<ChartSeries> _series; | |
| 85 | |
| 86 bool _pendingLegendUpdate = false; | |
| 87 List<ChartBehavior> _behaviors = new List<ChartBehavior>(); | |
| 88 Map<ChartSeries, _ChartSeriesInfo> _seriesInfoCache = new Map(); | |
| 89 | |
| 90 StreamController<ChartEvent> _valueMouseOverController; | |
| 91 StreamController<ChartEvent> _valueMouseOutController; | |
| 92 StreamController<ChartEvent> _valueMouseClickController; | |
| 93 StreamController<ChartArea> _chartAxesUpdatedController; | |
| 94 | |
| 95 DefaultCartesianAreaImpl( | |
| 96 this.host, | |
| 97 ChartData data, | |
| 98 ChartConfig config, | |
| 99 bool autoUpdate, | |
| 100 this.useTwoDimensionAxes, | |
| 101 this.useRowColoring, | |
| 102 this.state) : _autoUpdate = autoUpdate { | |
| 103 assert(host != null); | |
| 104 assert(isNotInline(host)); | |
| 105 | |
| 106 this.data = data; | |
| 107 this.config = config; | |
| 108 theme = new QuantumChartTheme(); | |
| 109 | |
| 110 Transition.defaultEasingType = theme.transitionEasingType; | |
| 111 Transition.defaultEasingMode = theme.transitionEasingMode; | |
| 112 Transition.defaultDurationMilliseconds = | |
| 113 theme.transitionDurationMilliseconds; | |
| 114 } | |
| 115 | |
| 116 void dispose() { | |
| 117 _configEventsDisposer.dispose(); | |
| 118 _dataEventsDisposer.dispose(); | |
| 119 _config.legend.dispose(); | |
| 120 | |
| 121 if (_valueMouseOverController != null) { | |
| 122 _valueMouseOverController.close(); | |
| 123 _valueMouseOverController = null; | |
| 124 } | |
| 125 if (_valueMouseOutController != null) { | |
| 126 _valueMouseOutController.close(); | |
| 127 _valueMouseOutController = null; | |
| 128 } | |
| 129 if (_valueMouseClickController != null) { | |
| 130 _valueMouseClickController.close(); | |
| 131 _valueMouseClickController = null; | |
| 132 } | |
| 133 if (_chartAxesUpdatedController != null) { | |
| 134 _chartAxesUpdatedController.close(); | |
| 135 _chartAxesUpdatedController = null; | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 static bool isNotInline(Element e) => | |
| 140 e != null && e.getComputedStyle().display != 'inline'; | |
| 141 | |
| 142 /// Set new data for this chart. If [value] is [Observable], subscribes to | |
| 143 /// changes and updates the chart when data changes. | |
| 144 @override | |
| 145 set data(ChartData value) { | |
| 146 _data = value; | |
| 147 _dataEventsDisposer.dispose(); | |
| 148 _pendingLegendUpdate = true; | |
| 149 | |
| 150 if (autoUpdate && _data != null && _data is Observable) { | |
| 151 _dataEventsDisposer.add((_data as Observable).changes.listen((_) { | |
| 152 _pendingLegendUpdate = true; | |
| 153 draw(); | |
| 154 })); | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 @override | |
| 159 ChartData get data => _data; | |
| 160 | |
| 161 /// Set new config for this chart. If [value] is [Observable], subscribes to | |
| 162 /// changes and updates the chart when series or dimensions change. | |
| 163 @override | |
| 164 set config(ChartConfig value) { | |
| 165 _config = value; | |
| 166 _configEventsDisposer.dispose(); | |
| 167 _pendingLegendUpdate = true; | |
| 168 | |
| 169 if (_config != null && _config is Observable) { | |
| 170 _configEventsDisposer.add((_config as Observable).changes.listen((_) { | |
| 171 _pendingLegendUpdate = true; | |
| 172 draw(); | |
| 173 })); | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 @override | |
| 178 ChartConfig get config => _config; | |
| 179 | |
| 180 @override | |
| 181 set autoUpdate(bool value) { | |
| 182 if (_autoUpdate != value) { | |
| 183 _autoUpdate = value; | |
| 184 this.data = _data; | |
| 185 this.config = _config; | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 @override | |
| 190 bool get autoUpdate => _autoUpdate; | |
| 191 | |
| 192 /// Gets measure axis from cache - creates a new instance of _ChartAxis | |
| 193 /// if one was not already created for the given [axisId]. | |
| 194 DefaultChartAxisImpl _getMeasureAxis(String axisId) { | |
| 195 _measureAxes.putIfAbsent(axisId, () { | |
| 196 var axisConf = config.getMeasureAxis(axisId), | |
| 197 axis = axisConf != null ? | |
| 198 new DefaultChartAxisImpl.withAxisConfig(this, axisConf) : | |
| 199 new DefaultChartAxisImpl(this); | |
| 200 return axis; | |
| 201 }); | |
| 202 return _measureAxes[axisId]; | |
| 203 } | |
| 204 | |
| 205 /// Gets a dimension axis from cache - creates a new instance of _ChartAxis | |
| 206 /// if one was not already created for the given dimension [column]. | |
| 207 DefaultChartAxisImpl _getDimensionAxis(int column) { | |
| 208 _dimensionAxes.putIfAbsent(column, () { | |
| 209 var axisConf = config.getDimensionAxis(column), | |
| 210 axis = axisConf != null ? | |
| 211 new DefaultChartAxisImpl.withAxisConfig(this, axisConf) : | |
| 212 new DefaultChartAxisImpl(this); | |
| 213 return axis; | |
| 214 }); | |
| 215 return _dimensionAxes[column]; | |
| 216 } | |
| 217 | |
| 218 /// All columns rendered by a series must be of the same type. | |
| 219 bool _isSeriesValid(ChartSeries s) { | |
| 220 var first = data.columns.elementAt(s.measures.first).type; | |
| 221 return s.measures.every((i) => | |
| 222 (i < data.columns.length) && data.columns.elementAt(i).type == first); | |
| 223 } | |
| 224 | |
| 225 @override | |
| 226 Iterable<Scale> get dimensionScales => | |
| 227 config.dimensions.map((int column) => _getDimensionAxis(column).scale); | |
| 228 | |
| 229 @override | |
| 230 Iterable<Scale> measureScales(ChartSeries series) { | |
| 231 var axisIds = isNullOrEmpty(series.measureAxisIds) | |
| 232 ? MEASURE_AXIS_IDS | |
| 233 : series.measureAxisIds; | |
| 234 return axisIds.map((String id) => _getMeasureAxis(id).scale); | |
| 235 } | |
| 236 | |
| 237 /// Computes the size of chart and if changed from the previous time | |
| 238 /// size was computed, sets attributes on svg element | |
| 239 Rect _computeChartSize() { | |
| 240 int width = host.clientWidth, | |
| 241 height = host.clientHeight; | |
| 242 | |
| 243 if (config.minimumSize != null) { | |
| 244 width = max([width, config.minimumSize.width]); | |
| 245 height = max([height, config.minimumSize.height]); | |
| 246 } | |
| 247 | |
| 248 AbsoluteRect padding = theme.padding; | |
| 249 num paddingLeft = config.isRTL ? padding.end : padding.start; | |
| 250 Rect current = new Rect(paddingLeft, padding.top, | |
| 251 width - (padding.start + padding.end), | |
| 252 height - (padding.top + padding.bottom)); | |
| 253 if (layout.chartArea == null || layout.chartArea != current) { | |
| 254 _svg.attr('width', width.toString()); | |
| 255 _svg.attr('height', height.toString()); | |
| 256 layout.chartArea = current; | |
| 257 | |
| 258 var transform = 'translate(${paddingLeft},${padding.top})'; | |
| 259 visualization.first.attributes['transform'] = transform; | |
| 260 lowerBehaviorPane.first.attributes['transform'] = transform; | |
| 261 upperBehaviorPane.first.attributes['transform'] = transform; | |
| 262 } | |
| 263 return layout.chartArea; | |
| 264 } | |
| 265 | |
| 266 @override | |
| 267 draw({bool preRender:false, Future schedulePostRender}) { | |
| 268 assert(data != null && config != null); | |
| 269 assert(config.series != null && config.series.isNotEmpty); | |
| 270 | |
| 271 // One time initialization. | |
| 272 // Each [ChartArea] has it's own [SelectionScope] | |
| 273 if (_scope == null) { | |
| 274 _scope = new SelectionScope.element(host); | |
| 275 _svg = _scope.append('svg:svg')..classed('chart-canvas'); | |
| 276 if (!isNullOrEmpty(theme.filters)) { | |
| 277 var element = _svg.first, | |
| 278 defs = Namespace.createChildElement('defs', element) | |
| 279 ..append(new SvgElement.svg( | |
| 280 theme.filters, treeSanitizer: new NullTreeSanitizer())); | |
| 281 _svg.first.append(defs); | |
| 282 } | |
| 283 | |
| 284 lowerBehaviorPane = _svg.append('g')..classed('lower-render-pane'); | |
| 285 visualization = _svg.append('g')..classed('chart-render-pane'); | |
| 286 upperBehaviorPane = _svg.append('g')..classed('upper-render-pane'); | |
| 287 | |
| 288 if (_behaviors.isNotEmpty) { | |
| 289 _behaviors.forEach( | |
| 290 (b) => b.init(this, upperBehaviorPane, lowerBehaviorPane)); | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 // Compute chart sizes and filter out unsupported series | |
| 295 _computeChartSize(); | |
| 296 var series = config.series.where((s) => | |
| 297 _isSeriesValid(s) && s.renderer.prepare(this, s)), | |
| 298 selection = visualization.selectAll('.series-group'). | |
| 299 data(series, (x) => x.hashCode), | |
| 300 axesDomainCompleter = new Completer(); | |
| 301 | |
| 302 // Wait till the axes are rendered before rendering series. | |
| 303 // In an SVG, z-index is based on the order of nodes in the DOM. | |
| 304 axesDomainCompleter.future.then((_) { | |
| 305 selection.enter.append('svg:g')..classed('series-group'); | |
| 306 String transform = | |
| 307 'translate(${layout.renderArea.x},${layout.renderArea.y})'; | |
| 308 | |
| 309 selection.each((ChartSeries s, _, Element group) { | |
| 310 _ChartSeriesInfo info = _seriesInfoCache[s]; | |
| 311 if (info == null) { | |
| 312 info = _seriesInfoCache[s] = new _ChartSeriesInfo(this, s); | |
| 313 } | |
| 314 info.check(); | |
| 315 group.attributes['transform'] = transform; | |
| 316 (s.renderer as CartesianRenderer) | |
| 317 .draw(group, schedulePostRender:schedulePostRender); | |
| 318 }); | |
| 319 | |
| 320 // A series that was rendered earlier isn't there anymore, remove it | |
| 321 selection.exit | |
| 322 ..each((ChartSeries s, _, __) { | |
| 323 var info = _seriesInfoCache.remove(s); | |
| 324 if (info != null) { | |
| 325 info.dispose(); | |
| 326 } | |
| 327 }) | |
| 328 ..remove(); | |
| 329 | |
| 330 // Notify on the stream that the chart has been updated. | |
| 331 isReady = true; | |
| 332 if (_chartAxesUpdatedController != null) { | |
| 333 _chartAxesUpdatedController.add(this); | |
| 334 } | |
| 335 }); | |
| 336 | |
| 337 // Save the list of valid series and initialize axes. | |
| 338 _series = series; | |
| 339 _initAxes(preRender: preRender); | |
| 340 | |
| 341 // Render the chart, now that the axes layer is already in DOM. | |
| 342 axesDomainCompleter.complete(); | |
| 343 | |
| 344 // Updates the legend if required. | |
| 345 _updateLegend(); | |
| 346 } | |
| 347 | |
| 348 String _orientRTL(String orientation) => orientation; | |
| 349 Scale _scaleRTL(Scale scale) => scale; | |
| 350 | |
| 351 /// Initialize the axes - required even if the axes are not being displayed. | |
| 352 _initAxes({bool preRender: false}) { | |
| 353 Map measureAxisUsers = <String,Iterable<ChartSeries>>{}; | |
| 354 | |
| 355 // Create necessary measures axes. | |
| 356 // If measure axes were not configured on the series, default is used. | |
| 357 _series.forEach((ChartSeries s) { | |
| 358 var measureAxisIds = isNullOrEmpty(s.measureAxisIds) | |
| 359 ? MEASURE_AXIS_IDS | |
| 360 : s.measureAxisIds; | |
| 361 measureAxisIds.forEach((axisId) { | |
| 362 _getMeasureAxis(axisId); // Creates axis if required | |
| 363 var users = measureAxisUsers[axisId]; | |
| 364 if (users == null) { | |
| 365 measureAxisUsers[axisId] = [s]; | |
| 366 } else { | |
| 367 users.add(s); | |
| 368 } | |
| 369 }); | |
| 370 }); | |
| 371 | |
| 372 // Now that we know a list of series using each measure axis, configure | |
| 373 // the input domain of each axis. | |
| 374 measureAxisUsers.forEach((id, listOfSeries) { | |
| 375 var sampleCol = listOfSeries.first.measures.first, | |
| 376 sampleColSpec = data.columns.elementAt(sampleCol), | |
| 377 axis = _getMeasureAxis(id), | |
| 378 domain; | |
| 379 | |
| 380 if (sampleColSpec.useOrdinalScale) { | |
| 381 throw new UnsupportedError( | |
| 382 'Ordinal measure axes are not currently supported.'); | |
| 383 } else { | |
| 384 // Extent is available because [ChartRenderer.prepare] was already | |
| 385 // called (when checking for valid series in [draw]. | |
| 386 Iterable extents = listOfSeries.map((s) => s.renderer.extent).toList(); | |
| 387 var lowest = min(extents.map((e) => e.min)), | |
| 388 highest = max(extents.map((e) => e.max)); | |
| 389 | |
| 390 // Use default domain if lowest and highest are the same, right now | |
| 391 // lowest is always 0 unless it is less than 0 - change to lowest when | |
| 392 // we make use of it. | |
| 393 domain = highest == lowest | |
| 394 ? (highest == 0 | |
| 395 ? [0, 1] | |
| 396 : (highest < 0 ? [highest, 0] : [0, highest])) | |
| 397 : (lowest <= 0 ? [lowest, highest] : [0, highest]); | |
| 398 } | |
| 399 axis.initAxisDomain(sampleCol, false, domain); | |
| 400 }); | |
| 401 | |
| 402 // Configure dimension axes. | |
| 403 int dimensionAxesCount = useTwoDimensionAxes ? 2 : 1; | |
| 404 config.dimensions.take(dimensionAxesCount).forEach((int column) { | |
| 405 var axis = _getDimensionAxis(column), | |
| 406 sampleColumnSpec = data.columns.elementAt(column), | |
| 407 values = data.rows.map((row) => row.elementAt(column)), | |
| 408 domain; | |
| 409 | |
| 410 if (sampleColumnSpec.useOrdinalScale) { | |
| 411 domain = values.map((e) => e.toString()).toList(); | |
| 412 } else { | |
| 413 var extent = new Extent.items(values); | |
| 414 domain = [extent.min, extent.max]; | |
| 415 } | |
| 416 axis.initAxisDomain(column, true, domain); | |
| 417 }); | |
| 418 | |
| 419 // See if any dimensions need "band" on the axis. | |
| 420 dimensionsUsingBands.clear(); | |
| 421 List<bool> usingBands = [false, false]; | |
| 422 _series.forEach((ChartSeries s) => | |
| 423 (s.renderer as CartesianRenderer).dimensionsUsingBand.forEach((x) { | |
| 424 if (x <= 1 && !(usingBands[x])) { | |
| 425 usingBands[x] = true; | |
| 426 dimensionsUsingBands.add(config.dimensions.elementAt(x)); | |
| 427 } | |
| 428 })); | |
| 429 | |
| 430 // List of measure and dimension axes that are displayed | |
| 431 assert( | |
| 432 isNullOrEmpty(config.displayedMeasureAxes) || | |
| 433 config.displayedMeasureAxes.length < 2); | |
| 434 var measureAxesCount = dimensionAxesCount == 1 ? 2 : 0, | |
| 435 displayedMeasureAxes = (isNullOrEmpty(config.displayedMeasureAxes) | |
| 436 ? _measureAxes.keys.take(measureAxesCount) | |
| 437 : config.displayedMeasureAxes.take(measureAxesCount)). | |
| 438 toList(growable: false), | |
| 439 displayedDimensionAxes = | |
| 440 config.dimensions.take(dimensionAxesCount).toList(growable: false); | |
| 441 | |
| 442 // Compute size of the dimension axes | |
| 443 if (config.renderDimensionAxes != false) { | |
| 444 var dimensionAxisOrientations = config.isLeftAxisPrimary | |
| 445 ? DIMENSION_AXIS_ORIENTATIONS.last | |
| 446 : DIMENSION_AXIS_ORIENTATIONS.first; | |
| 447 for (int i = 0, len = displayedDimensionAxes.length; i < len; ++i) { | |
| 448 var axis = _dimensionAxes[displayedDimensionAxes[i]], | |
| 449 orientation = _orientRTL(dimensionAxisOrientations[i]); | |
| 450 axis.prepareToDraw(orientation); | |
| 451 layout._axes[orientation] = axis.size; | |
| 452 } | |
| 453 } | |
| 454 | |
| 455 // Compute size of the measure axes | |
| 456 if (displayedMeasureAxes.isNotEmpty) { | |
| 457 var measureAxisOrientations = config.isLeftAxisPrimary | |
| 458 ? MEASURE_AXIS_ORIENTATIONS.last | |
| 459 : MEASURE_AXIS_ORIENTATIONS.first; | |
| 460 displayedMeasureAxes.asMap().forEach((int index, String key) { | |
| 461 var axis = _measureAxes[key], | |
| 462 orientation = _orientRTL(measureAxisOrientations[index]); | |
| 463 axis.prepareToDraw(orientation); | |
| 464 layout._axes[orientation] = axis.size; | |
| 465 }); | |
| 466 } | |
| 467 | |
| 468 // Consolidate all the information that we collected into final layout | |
| 469 _computeLayout( | |
| 470 displayedMeasureAxes.isEmpty && config.renderDimensionAxes == false); | |
| 471 | |
| 472 // Domains for all axes have been taken care of and _ChartAxis ensures | |
| 473 // that the scale is initialized on visible axes. Initialize the scale on | |
| 474 // all invisible measure scales. | |
| 475 if (_measureAxes.length != displayedMeasureAxes.length) { | |
| 476 _measureAxes.keys.forEach((String axisId) { | |
| 477 if (displayedMeasureAxes.contains(axisId)) return; | |
| 478 _getMeasureAxis(axisId).initAxisScale([layout.renderArea.height, 0]); | |
| 479 }); | |
| 480 } | |
| 481 | |
| 482 // Draw the visible measure axes, if any. | |
| 483 if (displayedMeasureAxes.isNotEmpty) { | |
| 484 var axisGroups = visualization. | |
| 485 selectAll('.measure-axis-group').data(displayedMeasureAxes); | |
| 486 // Update measure axis (add/remove/update) | |
| 487 axisGroups.enter.append('svg:g'); | |
| 488 axisGroups.each((axisId, index, group) { | |
| 489 _getMeasureAxis(axisId).draw(group, _scope, preRender: preRender); | |
| 490 group.attributes['class'] = 'measure-axis-group measure-${index}'; | |
| 491 }); | |
| 492 axisGroups.exit.remove(); | |
| 493 } | |
| 494 | |
| 495 // Draw the dimension axes, unless asked not to. | |
| 496 if (config.renderDimensionAxes != false) { | |
| 497 var dimAxisGroups = visualization. | |
| 498 selectAll('.dimension-axis-group').data(displayedDimensionAxes); | |
| 499 // Update dimension axes (add/remove/update) | |
| 500 dimAxisGroups.enter.append('svg:g'); | |
| 501 dimAxisGroups.each((column, index, group) { | |
| 502 _getDimensionAxis(column).draw(group, _scope, preRender: preRender); | |
| 503 group.attributes['class'] = 'dimension-axis-group dim-${index}'; | |
| 504 }); | |
| 505 dimAxisGroups.exit.remove(); | |
| 506 } else { | |
| 507 // Initialize scale on invisible axis | |
| 508 var dimensionAxisOrientations = config.isLeftAxisPrimary ? | |
| 509 DIMENSION_AXIS_ORIENTATIONS.last : DIMENSION_AXIS_ORIENTATIONS.first; | |
| 510 for (int i = 0; i < dimensionAxesCount; ++i) { | |
| 511 var column = config.dimensions.elementAt(i), | |
| 512 axis = _dimensionAxes[column], | |
| 513 orientation = dimensionAxisOrientations[i]; | |
| 514 axis.initAxisScale(orientation == ORIENTATION_LEFT ? | |
| 515 [layout.renderArea.height, 0] : [0, layout.renderArea.width]); | |
| 516 }; | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 // Compute chart render area size and positions of all elements | |
| 521 _computeLayout(bool notRenderingAxes) { | |
| 522 if (notRenderingAxes) { | |
| 523 layout.renderArea = | |
| 524 new Rect(0, 0, layout.chartArea.height, layout.chartArea.width); | |
| 525 return; | |
| 526 } | |
| 527 | |
| 528 var top = layout.axes[ORIENTATION_TOP], | |
| 529 left = layout.axes[ORIENTATION_LEFT], | |
| 530 bottom = layout.axes[ORIENTATION_BOTTOM], | |
| 531 right = layout.axes[ORIENTATION_RIGHT]; | |
| 532 | |
| 533 var renderAreaHeight = layout.chartArea.height - | |
| 534 (top.height + layout.axes[ORIENTATION_BOTTOM].height), | |
| 535 renderAreaWidth = layout.chartArea.width - | |
| 536 (left.width + layout.axes[ORIENTATION_RIGHT].width); | |
| 537 | |
| 538 layout.renderArea = new Rect( | |
| 539 left.width, top.height, renderAreaWidth, renderAreaHeight); | |
| 540 | |
| 541 layout._axes | |
| 542 ..[ORIENTATION_TOP] = | |
| 543 new Rect(left.width, 0, renderAreaWidth, top.height) | |
| 544 ..[ORIENTATION_RIGHT] = | |
| 545 new Rect(left.width + renderAreaWidth, top.y, | |
| 546 right.width, renderAreaHeight) | |
| 547 ..[ORIENTATION_BOTTOM] = | |
| 548 new Rect(left.width, top.height + renderAreaHeight, | |
| 549 renderAreaWidth, bottom.height) | |
| 550 ..[ORIENTATION_LEFT] = | |
| 551 new Rect( | |
| 552 left.width, top.height, left.width, renderAreaHeight); | |
| 553 } | |
| 554 | |
| 555 // Updates the legend, if configuration changed since the last | |
| 556 // time the legend was updated. | |
| 557 _updateLegend() { | |
| 558 if (!_pendingLegendUpdate) return; | |
| 559 if (_config == null || _config.legend == null || _series.isEmpty) return; | |
| 560 | |
| 561 var legend = <ChartLegendItem>[]; | |
| 562 List seriesByColumn = | |
| 563 new List.generate(data.columns.length, (_) => new List()); | |
| 564 | |
| 565 _series.forEach((s) => | |
| 566 s.measures.forEach((m) => seriesByColumn[m].add(s))); | |
| 567 | |
| 568 seriesByColumn.asMap().forEach((int i, List s) { | |
| 569 if (s.length == 0) return; | |
| 570 legend.add(new ChartLegendItem( | |
| 571 index:i, label:data.columns.elementAt(i).label, series:s, | |
| 572 color:theme.getColorForKey(i))); | |
| 573 }); | |
| 574 | |
| 575 _config.legend.update(legend, this); | |
| 576 _pendingLegendUpdate = false; | |
| 577 } | |
| 578 | |
| 579 @override | |
| 580 Stream<ChartEvent> get onMouseUp => | |
| 581 host.onMouseUp | |
| 582 .map((MouseEvent e) => new DefaultChartEventImpl(e, this)); | |
| 583 | |
| 584 @override | |
| 585 Stream<ChartEvent> get onMouseDown => | |
| 586 host.onMouseDown | |
| 587 .map((MouseEvent e) => new DefaultChartEventImpl(e, this)); | |
| 588 | |
| 589 @override | |
| 590 Stream<ChartEvent> get onMouseOver => | |
| 591 host.onMouseOver | |
| 592 .map((MouseEvent e) => new DefaultChartEventImpl(e, this)); | |
| 593 | |
| 594 @override | |
| 595 Stream<ChartEvent> get onMouseOut => | |
| 596 host.onMouseOut | |
| 597 .map((MouseEvent e) => new DefaultChartEventImpl(e, this)); | |
| 598 | |
| 599 @override | |
| 600 Stream<ChartEvent> get onMouseMove => | |
| 601 host.onMouseMove | |
| 602 .map((MouseEvent e) => new DefaultChartEventImpl(e, this)); | |
| 603 | |
| 604 @override | |
| 605 Stream<ChartEvent> get onValueClick { | |
| 606 if (_valueMouseClickController == null) { | |
| 607 _valueMouseClickController = new StreamController.broadcast(sync: true); | |
| 608 } | |
| 609 return _valueMouseClickController.stream; | |
| 610 } | |
| 611 | |
| 612 @override | |
| 613 Stream<ChartEvent> get onValueMouseOver { | |
| 614 if (_valueMouseOverController == null) { | |
| 615 _valueMouseOverController = new StreamController.broadcast(sync: true); | |
| 616 } | |
| 617 return _valueMouseOverController.stream; | |
| 618 } | |
| 619 | |
| 620 @override | |
| 621 Stream<ChartEvent> get onValueMouseOut { | |
| 622 if (_valueMouseOutController == null) { | |
| 623 _valueMouseOutController = new StreamController.broadcast(sync: true); | |
| 624 } | |
| 625 return _valueMouseOutController.stream; | |
| 626 } | |
| 627 | |
| 628 @override | |
| 629 Stream<ChartArea> get onChartAxesUpdated { | |
| 630 if (_chartAxesUpdatedController == null) { | |
| 631 _chartAxesUpdatedController = new StreamController.broadcast(sync: true); | |
| 632 } | |
| 633 return _chartAxesUpdatedController.stream; | |
| 634 } | |
| 635 | |
| 636 @override | |
| 637 void addChartBehavior(ChartBehavior behavior) { | |
| 638 if (behavior == null || _behaviors.contains(behavior)) return; | |
| 639 _behaviors.add(behavior); | |
| 640 if (upperBehaviorPane != null && lowerBehaviorPane != null) { | |
| 641 behavior.init(this, upperBehaviorPane, lowerBehaviorPane); | |
| 642 } | |
| 643 } | |
| 644 | |
| 645 @override | |
| 646 void removeChartBehavior(ChartBehavior behavior) { | |
| 647 if (behavior == null || !_behaviors.contains(behavior)) return; | |
| 648 if (upperBehaviorPane != null && lowerBehaviorPane != null) { | |
| 649 behavior.dispose(); | |
| 650 } | |
| 651 _behaviors.remove(behavior); | |
| 652 } | |
| 653 } | |
| 654 | |
| 655 class _ChartAreaLayout implements ChartAreaLayout { | |
| 656 final _axes = <String, Rect>{ | |
| 657 ORIENTATION_LEFT: const Rect(), | |
| 658 ORIENTATION_RIGHT: const Rect(), | |
| 659 ORIENTATION_TOP: const Rect(), | |
| 660 ORIENTATION_BOTTOM: const Rect() | |
| 661 }; | |
| 662 | |
| 663 UnmodifiableMapView<String, Rect> _axesView; | |
| 664 | |
| 665 @override | |
| 666 get axes => _axesView; | |
| 667 | |
| 668 @override | |
| 669 Rect renderArea; | |
| 670 | |
| 671 @override | |
| 672 Rect chartArea; | |
| 673 | |
| 674 _ChartAreaLayout() { | |
| 675 _axesView = new UnmodifiableMapView(_axes); | |
| 676 } | |
| 677 } | |
| 678 | |
| 679 class _ChartSeriesInfo { | |
| 680 CartesianRenderer _renderer; | |
| 681 SubscriptionsDisposer _disposer = new SubscriptionsDisposer(); | |
| 682 | |
| 683 DefaultChartSeriesImpl _series; | |
| 684 DefaultCartesianAreaImpl _area; | |
| 685 _ChartSeriesInfo(this._area, this._series); | |
| 686 | |
| 687 _click(ChartEvent e) { | |
| 688 var state = _area.state; | |
| 689 if (state != null) { | |
| 690 if (state.isHighlighted(e.column, e.row)) { | |
| 691 state.unhighlight(e.column, e.row); | |
| 692 } else { | |
| 693 state.highlight(e.column, e.row); | |
| 694 } | |
| 695 } | |
| 696 if (_area._valueMouseClickController != null) { | |
| 697 _area._valueMouseClickController.add(e); | |
| 698 } | |
| 699 } | |
| 700 | |
| 701 _mouseOver(ChartEvent e) { | |
| 702 var state = _area.state; | |
| 703 if (state != null) { | |
| 704 state.hovered = new Pair(e.column, e.row); | |
| 705 } | |
| 706 if (_area._valueMouseOverController != null) { | |
| 707 _area._valueMouseOverController.add(e); | |
| 708 } | |
| 709 } | |
| 710 | |
| 711 _mouseOut(ChartEvent e) { | |
| 712 var state = _area.state; | |
| 713 if (state != null) { | |
| 714 var current = state.hovered; | |
| 715 if (current != null && | |
| 716 current.first == e.column && current.last == e.row) { | |
| 717 state.hovered = null; | |
| 718 } | |
| 719 } | |
| 720 if (_area._valueMouseOutController != null) { | |
| 721 _area._valueMouseOutController.add(e); | |
| 722 } | |
| 723 } | |
| 724 | |
| 725 check() { | |
| 726 if (_renderer != _series.renderer) { | |
| 727 dispose(); | |
| 728 if (_series.renderer is ChartRendererBehaviorSource){ | |
| 729 _disposer.addAll([ | |
| 730 _series.renderer.onValueClick.listen(_click), | |
| 731 _series.renderer.onValueMouseOver.listen(_mouseOver), | |
| 732 _series.renderer.onValueMouseOut.listen(_mouseOut) | |
| 733 ]); | |
| 734 } | |
| 735 } | |
| 736 _renderer = _series.renderer; | |
| 737 } | |
| 738 | |
| 739 dispose() => _disposer.dispose(); | |
| 740 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1400473008:
Roll Observatory packages and add a roll script (Closed)
Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master