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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 abstract class CartesianRendererBase implements CartesianRenderer { | |
| 12 final SubscriptionsDisposer _disposer = new SubscriptionsDisposer(); | |
| 13 | |
| 14 CartesianArea area; | |
| 15 ChartSeries series; | |
| 16 ChartTheme theme; | |
| 17 ChartState state; | |
| 18 Rect rect; | |
| 19 | |
| 20 List<int> _columnStateCache; | |
| 21 List<Iterable<String>> _columnStylesCache; | |
| 22 | |
| 23 final _valueColorCache = new Map<int,String>(); | |
| 24 final _valueFilterCache = new Map<int,String>(); | |
| 25 final _valueStylesCache = new Map<int,Iterable<String>>(); | |
| 26 | |
| 27 Element host; | |
| 28 Selection root; | |
| 29 SelectionScope scope; | |
| 30 | |
| 31 StreamController<ChartEvent> mouseOverController; | |
| 32 StreamController<ChartEvent> mouseOutController; | |
| 33 StreamController<ChartEvent> mouseClickController; | |
| 34 | |
| 35 void _ensureAreaAndSeries(CartesianArea area, ChartSeries series) { | |
| 36 assert(area != null && series != null); | |
| 37 assert(this.area == null || this.area == area); | |
| 38 if (this.area == null) { | |
| 39 if (area.state != null) { | |
| 40 this.state = area.state; | |
| 41 _disposer.add(this.state.changes.listen((changes) { | |
| 42 resetStylesCache(); | |
| 43 handleStateChanges(changes); | |
| 44 })); | |
| 45 } | |
| 46 } | |
| 47 this.area = area; | |
| 48 this.series = series; | |
| 49 } | |
| 50 | |
| 51 void _ensureReadyToDraw(Element element) { | |
| 52 assert(series != null && area != null); | |
| 53 assert(element != null && element is GElement); | |
| 54 | |
| 55 if (scope == null) { | |
| 56 host = element; | |
| 57 scope = new SelectionScope.element(element); | |
| 58 root = scope.selectElements([host]); | |
| 59 } | |
| 60 | |
| 61 theme = area.theme; | |
| 62 rect = area.layout.renderArea; | |
| 63 resetStylesCache(); | |
| 64 } | |
| 65 | |
| 66 void resetStylesCache() { | |
| 67 var length = area.data.columns.length; | |
| 68 _columnStylesCache = new List(length); | |
| 69 _columnStateCache = new List(length); | |
| 70 _valueStylesCache.clear(); | |
| 71 _valueColorCache.clear(); | |
| 72 _valueFilterCache.clear(); | |
| 73 _computeColumnStates(); | |
| 74 } | |
| 75 | |
| 76 /// Override this method to handle state changes. | |
| 77 void handleStateChanges(List<ChangeRecord> changes); | |
| 78 | |
| 79 @override | |
| 80 Extent get extent { | |
| 81 assert(series != null && area != null); | |
| 82 var rows = area.data.rows, | |
| 83 measures = series.measures, | |
| 84 max = SMALL_INT_MIN, | |
| 85 min = SMALL_INT_MAX; | |
| 86 | |
| 87 for (int i = 0, len = rows.length; i < len; ++i) { | |
| 88 var row = rows.elementAt(i); | |
| 89 for (int j = 0, jLen = measures.length; j < jLen; ++j) { | |
| 90 var value = row.elementAt(measures.elementAt(j)); | |
| 91 if (value != null && value.isFinite) { | |
| 92 if (value > max) { | |
| 93 max = value; | |
| 94 } else if (value < min) { | |
| 95 min = value; | |
| 96 } | |
| 97 } | |
| 98 } | |
| 99 } | |
| 100 return new Extent(min, max); | |
| 101 } | |
| 102 | |
| 103 @override | |
| 104 Extent extentForRow(Iterable row) { | |
| 105 assert(series != null && area != null); | |
| 106 var measures = series.measures, | |
| 107 max = SMALL_INT_MIN, | |
| 108 min = SMALL_INT_MAX; | |
| 109 | |
| 110 for (int i = 0, len = measures.length; i < len; ++i) { | |
| 111 var measure = measures.elementAt(i), | |
| 112 value = row.elementAt(measure); | |
| 113 if (value != null && value.isFinite) { | |
| 114 if (value > max) { | |
| 115 max = value; | |
| 116 } else if (value < min) { | |
| 117 min = value; | |
| 118 } | |
| 119 } | |
| 120 } | |
| 121 return new Extent(min, max); | |
| 122 } | |
| 123 | |
| 124 @override | |
| 125 Stream<ChartEvent> get onValueMouseOver { | |
| 126 if (mouseOverController == null) { | |
| 127 mouseOverController = new StreamController.broadcast(sync: true); | |
| 128 } | |
| 129 return mouseOverController.stream; | |
| 130 } | |
| 131 | |
| 132 @override | |
| 133 Stream<ChartEvent> get onValueMouseOut { | |
| 134 if (mouseOutController == null) { | |
| 135 mouseOutController = new StreamController.broadcast(sync: true); | |
| 136 } | |
| 137 return mouseOutController.stream; | |
| 138 } | |
| 139 | |
| 140 @override | |
| 141 Stream<ChartEvent> get onValueClick { | |
| 142 if (mouseClickController == null) { | |
| 143 mouseClickController = new StreamController.broadcast(sync: true); | |
| 144 } | |
| 145 return mouseClickController.stream; | |
| 146 } | |
| 147 | |
| 148 double get bandInnerPadding => 1.0; | |
| 149 double get bandOuterPadding => | |
| 150 area.theme.getDimensionAxisTheme().axisOuterPadding; | |
| 151 | |
| 152 void _computeColumnStates() { | |
| 153 area.config.series.forEach((ChartSeries series) { | |
| 154 series.measures.forEach((int column) { | |
| 155 if (_columnStateCache[column] != null) return; | |
| 156 int flags = 0; | |
| 157 if (state != null && area.useRowColoring == false) { | |
| 158 if (state.highlights.isNotEmpty) { | |
| 159 flags |= (state.highlights.any((x) => x.first == column) | |
| 160 ? ChartState.COL_HIGHLIGHTED | |
| 161 : ChartState.COL_UNHIGHLIGHTED); | |
| 162 } | |
| 163 if (state.selection.isNotEmpty) { | |
| 164 flags |= (state.isSelected(column) | |
| 165 ? ChartState.COL_SELECTED | |
| 166 : ChartState.COL_UNSELECTED); | |
| 167 } | |
| 168 if (!state.isVisible(column)) { | |
| 169 flags |= ChartState.COL_HIDDEN; | |
| 170 } | |
| 171 if (state.preview == column) { | |
| 172 flags |= ChartState.COL_PREVIEW; | |
| 173 } | |
| 174 if (state.hovered != null && state.hovered.first == column) { | |
| 175 flags |= ChartState.COL_HOVERED; | |
| 176 } | |
| 177 } | |
| 178 _columnStateCache[column] = flags; | |
| 179 }); | |
| 180 }); | |
| 181 } | |
| 182 | |
| 183 Iterable<String> stylesForColumn(int column) { | |
| 184 if (_columnStylesCache[column] == null) { | |
| 185 if (state == null || area.useRowColoring) { | |
| 186 _columnStylesCache[column] = const[]; | |
| 187 } else { | |
| 188 var styles = [], | |
| 189 flags = _columnStateCache[column]; | |
| 190 | |
| 191 if (flags & ChartState.COL_SELECTED != 0) { | |
| 192 styles.add(ChartState.COL_SELECTED_CLASS); | |
| 193 } else if (flags & ChartState.COL_UNSELECTED != 0){ | |
| 194 styles.add(ChartState.COL_UNSELECTED_CLASS); | |
| 195 } | |
| 196 | |
| 197 if (flags & ChartState.COL_HIGHLIGHTED != 0) { | |
| 198 styles.add(ChartState.COL_HIGHLIGHTED_CLASS); | |
| 199 } else if (flags & ChartState.COL_UNHIGHLIGHTED != 0) { | |
| 200 styles.add(ChartState.COL_UNHIGHLIGHTED_CLASS); | |
| 201 } | |
| 202 | |
| 203 if (flags & ChartState.COL_HOVERED != 0) { | |
| 204 styles.add(ChartState.COL_HOVERED_CLASS); | |
| 205 } | |
| 206 if (flags & ChartState.COL_PREVIEW != 0) { | |
| 207 styles.add(ChartState.COL_PREVIEW_CLASS); | |
| 208 } | |
| 209 if (flags & ChartState.COL_HIDDEN != 0) { | |
| 210 styles.add(ChartState.COL_HIDDEN_CLASS); | |
| 211 } | |
| 212 | |
| 213 _columnStylesCache[column] = styles; | |
| 214 } | |
| 215 } | |
| 216 return _columnStylesCache[column]; | |
| 217 } | |
| 218 | |
| 219 String colorForColumn(int column) => | |
| 220 theme.getColorForKey(column, _columnStateCache[column]); | |
| 221 | |
| 222 String filterForColumn(int column) => | |
| 223 theme.getFilterForState(_columnStateCache[column]); | |
| 224 | |
| 225 Iterable<String> stylesForValue(int column, int row) { | |
| 226 var hash = hash2(column, row); | |
| 227 if (_valueStylesCache[hash] == null) { | |
| 228 if (state == null) { | |
| 229 _valueStylesCache[hash] = const[]; | |
| 230 } else { | |
| 231 var styles = stylesForColumn(column).toList(); | |
| 232 if (state.highlights.isNotEmpty) { | |
| 233 styles.add(state.highlights.any((x) => x.last == row) | |
| 234 ? ChartState.VAL_HIGHLIGHTED_CLASS | |
| 235 : ChartState.VAL_UNHIGHLIGHTED_CLASS); | |
| 236 } | |
| 237 if (state.hovered != null && state.hovered.last == row) { | |
| 238 styles.add(ChartState.VAL_HOVERED_CLASS); | |
| 239 } | |
| 240 _valueStylesCache[hash] = styles; | |
| 241 } | |
| 242 } | |
| 243 return _valueStylesCache[hash]; | |
| 244 } | |
| 245 | |
| 246 String colorForValue(int column, int row) { | |
| 247 var hash = hash2(column, row); | |
| 248 if (_valueColorCache[hash] == null) { | |
| 249 _cacheColorsAndFilter(hash, column, row); | |
| 250 } | |
| 251 return _valueColorCache[hash]; | |
| 252 } | |
| 253 | |
| 254 String filterForValue(int column, int row) { | |
| 255 var hash = hash2(column, row); | |
| 256 if (_valueFilterCache[hash] == null) { | |
| 257 _cacheColorsAndFilter(hash, column, row); | |
| 258 } | |
| 259 return _valueFilterCache[hash]; | |
| 260 } | |
| 261 | |
| 262 _cacheColorsAndFilter(int hash, int column, int row) { | |
| 263 if (state == null) { | |
| 264 _valueColorCache[hash] = | |
| 265 theme.getColorForKey(area.useRowColoring ? row : column); | |
| 266 _valueFilterCache[hash] = theme.getFilterForState(0); | |
| 267 } else { | |
| 268 var flags = _columnStateCache[column]; | |
| 269 if (state.highlights.isNotEmpty) { | |
| 270 flags |= (state.highlights.any((x) => x.last == row) | |
| 271 ? ChartState.VAL_HIGHLIGHTED | |
| 272 : ChartState.VAL_UNHIGHLIGHTED); | |
| 273 } | |
| 274 if (state.hovered != null && state.hovered.last == row) { | |
| 275 flags |= ChartState.VAL_HOVERED; | |
| 276 } | |
| 277 _valueColorCache[hash] = | |
| 278 theme.getColorForKey(area.useRowColoring ? row : column, flags); | |
| 279 _valueFilterCache[hash] = theme.getFilterForState(flags); | |
| 280 } | |
| 281 } | |
| 282 } | |
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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