1 /*
2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package javafx.scene.chart;
27
28
29 import java.util.*;
30
31 import javafx.animation.*;
32 import javafx.application.Platform;
33 import javafx.beans.NamedArg;
34 import javafx.beans.property.DoubleProperty;
35 import javafx.beans.property.SimpleDoubleProperty;
36 import javafx.collections.FXCollections;
37 import javafx.collections.ListChangeListener;
38 import javafx.collections.ObservableList;
39 import javafx.scene.AccessibleRole;
40 import javafx.scene.Group;
41 import javafx.scene.Node;
42 import javafx.scene.layout.StackPane;
43 import javafx.scene.shape.*;
44 import javafx.util.Duration;
45
46 import com.sun.javafx.charts.Legend;
47 import com.sun.javafx.charts.Legend.LegendItem;
48 import com.sun.javafx.css.converters.BooleanConverter;
49
50 import javafx.beans.property.BooleanProperty;
51 import javafx.beans.value.WritableValue;
52 import javafx.css.CssMetaData;
53 import javafx.css.Styleable;
54 import javafx.css.StyleableBooleanProperty;
55 import javafx.css.StyleableProperty;
56
57 /**
58 * StackedAreaChart is a variation of {@link AreaChart} that displays trends of the
59 * contribution of each value. (over time e.g.) The areas are stacked so that each
60 * series adjoins but does not overlap the preceding series. This contrasts with
61 * the Area chart where each series overlays the preceding series.
62 *
63 * The cumulative nature of the StackedAreaChart gives an idea of the total Y data
64 * value at any given point along the X axis.
65 *
66 * Since data points across multiple series may not be common, StackedAreaChart
67 * interpolates values along the line joining the data points whenever necessary.
68 *
69 * @since JavaFX 2.1
70 */
71 public class StackedAreaChart<X,Y> extends XYChart<X,Y> {
72
73 // -------------- PRIVATE FIELDS ------------------------------------------
74
75 /** A multiplier for teh Y values that we store for each series, it is used to animate in a new series */
76 private Map<Series<X,Y>, DoubleProperty> seriesYMultiplierMap = new HashMap<>();
77 private Legend legend = new Legend();
78
79 // -------------- PUBLIC PROPERTIES ----------------------------------------
80 /**
81 * When true, CSS styleable symbols are created for any data items that
82 * don't have a symbol node specified.
83 * @since JavaFX 8.0
84 */
85 private BooleanProperty createSymbols = new StyleableBooleanProperty(true) {
86 @Override
87 protected void invalidated() {
88 for (int seriesIndex = 0; seriesIndex < getData().size(); seriesIndex++) {
89 Series<X, Y> series = getData().get(seriesIndex);
90 for (int itemIndex = 0; itemIndex < series.getData().size(); itemIndex++) {
91 Data<X, Y> item = series.getData().get(itemIndex);
92 Node symbol = item.getNode();
93 if (get() && symbol == null) { // create any symbols
94 symbol = createSymbol(series, getData().indexOf(series), item, itemIndex);
95 if (null != symbol) {
96 getPlotChildren().add(symbol);
97 }
98 } else if (!get() && symbol != null) { // remove symbols
99 getPlotChildren().remove(symbol);
100 symbol = null;
101 item.setNode(null);
102 }
103 }
104 }
105 requestChartLayout();
106 }
107
108 public Object getBean() {
109 return this;
110 }
111
112 public String getName() {
113 return "createSymbols";
114 }
115
116 public CssMetaData<StackedAreaChart<?, ?>,Boolean> getCssMetaData() {
117 return StyleableProperties.CREATE_SYMBOLS;
118 }
119 };
120
121 /**
122 * Indicates whether symbols for data points will be created or not.
123 *
124 * @return true if symbols for data points will be created and false otherwise.
125 * @since JavaFX 8.0
126 */
127 public final boolean getCreateSymbols() { return createSymbols.getValue(); }
128 public final void setCreateSymbols(boolean value) { createSymbols.setValue(value); }
129 public final BooleanProperty createSymbolsProperty() { return createSymbols; }
130
131 // -------------- CONSTRUCTORS ----------------------------------------------
132
133 /**
134 * Construct a new Area Chart with the given axis
135 *
136 * @param xAxis The x axis to use
137 * @param yAxis The y axis to use
138 */
139 public StackedAreaChart(@NamedArg("xAxis") Axis<X> xAxis, @NamedArg("yAxis") Axis<Y> yAxis) {
140 this(xAxis,yAxis, FXCollections.<Series<X,Y>>observableArrayList());
141 }
142
143 /**
144 * Construct a new Area Chart with the given axis and data.
145 * <p>
146 * Note: yAxis must be a ValueAxis, otherwise {@code IllegalArgumentException} is thrown.
147 *
148 * @param xAxis The x axis to use
149 * @param yAxis The y axis to use
150 * @param data The data to use, this is the actual list used so any changes to it will be reflected in the chart
151 *
152 * @throws java.lang.IllegalArgumentException if yAxis is not a ValueAxis
153 */
154 public StackedAreaChart(@NamedArg("xAxis") Axis<X> xAxis, @NamedArg("yAxis") Axis<Y> yAxis, @NamedArg("data") ObservableList<Series<X,Y>> data) {
155 super(xAxis,yAxis);
156 if (!(yAxis instanceof ValueAxis)) {
157 throw new IllegalArgumentException("Axis type incorrect, yAxis must be of ValueAxis type.");
158 }
159 setLegend(legend);
160 setData(data);
161 }
162
163 // -------------- METHODS ------------------------------------------------------------------------------------------
164
165 private static double doubleValue(Number number) { return doubleValue(number, 0); }
166 private static double doubleValue(Number number, double nullDefault) {
167 return (number == null) ? nullDefault : number.doubleValue();
168 }
169
170 @Override protected void dataItemAdded(Series<X,Y> series, int itemIndex, Data<X,Y> item) {
171 final Node symbol = createSymbol(series, getData().indexOf(series), item, itemIndex);
172 if (shouldAnimate()) {
173 boolean animate = false;
174 if (itemIndex > 0 && itemIndex < (series.getData().size()-1)) {
175 animate = true;
176 Data<X,Y> p1 = series.getData().get(itemIndex - 1);
177 Data<X,Y> p2 = series.getData().get(itemIndex + 1);
178 double x1 = getXAxis().toNumericValue(p1.getXValue());
179 double y1 = getYAxis().toNumericValue(p1.getYValue());
180 double x3 = getXAxis().toNumericValue(p2.getXValue());
181 double y3 = getYAxis().toNumericValue(p2.getYValue());
182
183 double x2 = getXAxis().toNumericValue(item.getXValue());
184 double y2 = getYAxis().toNumericValue(item.getYValue());
185
186 // //1. y intercept of the line : y = ((y3-y1)/(x3-x1)) * x2 + (x3y1 - y3x1)/(x3 -x1)
187 double y = ((y3-y1)/(x3-x1)) * x2 + (x3*y1 - y3*x1)/(x3-x1);
188 item.setCurrentY(getYAxis().toRealValue(y));
189 item.setCurrentX(getXAxis().toRealValue(x2));
190 //2. we can simply use the midpoint on the line as well..
191 // double x = (x3 + x1)/2;
192 // double y = (y3 + y1)/2;
193 // item.setCurrentX(x);
194 // item.setCurrentY(y);
195 } else if (itemIndex == 0 && series.getData().size() > 1) {
196 animate = true;
197 item.setCurrentX(series.getData().get(1).getXValue());
198 item.setCurrentY(series.getData().get(1).getYValue());
199 } else if (itemIndex == (series.getData().size() - 1) && series.getData().size() > 1) {
200 animate = true;
201 int last = series.getData().size() - 2;
202 item.setCurrentX(series.getData().get(last).getXValue());
203 item.setCurrentY(series.getData().get(last).getYValue());
204 } else if (symbol != null) {
205 // fade in new symbol
206 symbol.setOpacity(0);
207 getPlotChildren().add(symbol);
208 FadeTransition ft = new FadeTransition(Duration.millis(500),symbol);
209 ft.setToValue(1);
210 ft.play();
211 }
212 if (animate) {
213 animate(
214 new KeyFrame(Duration.ZERO,
215 (e) -> {
216 if (symbol != null && !getPlotChildren().contains(symbol)) {
217 getPlotChildren().add(symbol);
218 } },
219 new KeyValue(item.currentYProperty(),
220 item.getCurrentY()),
221 new KeyValue(item.currentXProperty(),
222 item.getCurrentX())
223 ),
224 new KeyFrame(Duration.millis(800), new KeyValue(item.currentYProperty(),
225 item.getYValue(), Interpolator.EASE_BOTH),
226 new KeyValue(item.currentXProperty(),
227 item.getXValue(), Interpolator.EASE_BOTH))
228 );
229 }
230
231 } else if (symbol != null) {
232 getPlotChildren().add(symbol);
233 }
234 }
235
236 @Override protected void dataItemRemoved(final Data<X,Y> item, final Series<X,Y> series) {
237 final Node symbol = item.getNode();
238
239 if (symbol != null) {
240 symbol.focusTraversableProperty().unbind();
241 }
242
243 // remove item from sorted list
244 int itemIndex = series.getItemIndex(item);
245 if (shouldAnimate()) {
246 boolean animate = false;
247 // dataSize represents size of currently visible data. After this operation, the number will decrement by 1
248 final int dataSize = series.getDataSize();
249 // This is the size of current data list in Series. Note that it might be totaly different from dataSize as
250 // some big operation might have happened on the list.
251 final int dataListSize = series.getData().size();
252 if (itemIndex > 0 && itemIndex < dataSize - 1) {
253 animate = true;
254 Data<X,Y> p1 = series.getItem(itemIndex - 1);
255 Data<X,Y> p2 = series.getItem(itemIndex + 1);
256 double x1 = getXAxis().toNumericValue(p1.getXValue());
257 double y1 = getYAxis().toNumericValue(p1.getYValue());
258 double x3 = getXAxis().toNumericValue(p2.getXValue());
259 double y3 = getYAxis().toNumericValue(p2.getYValue());
260
261 double x2 = getXAxis().toNumericValue(item.getXValue());
262 double y2 = getYAxis().toNumericValue(item.getYValue());
263
264 // //1. y intercept of the line : y = ((y3-y1)/(x3-x1)) * x2 + (x3y1 - y3x1)/(x3 -x1)
265 double y = ((y3-y1)/(x3-x1)) * x2 + (x3*y1 - y3*x1)/(x3-x1);
266 item.setCurrentX(getXAxis().toRealValue(x2));
267 item.setCurrentY(getYAxis().toRealValue(y2));
268 item.setXValue(getXAxis().toRealValue(x2));
269 item.setYValue(getYAxis().toRealValue(y));
270 //2. we can simply use the midpoint on the line as well..
271 // double x = (x3 + x1)/2;
272 // double y = (y3 + y1)/2;
273 // item.setCurrentX(x);
274 // item.setCurrentY(y);
275 } else if (itemIndex == 0 && dataListSize > 1) {
276 animate = true;
277 item.setXValue(series.getData().get(0).getXValue());
278 item.setYValue(series.getData().get(0).getYValue());
279 } else if (itemIndex == (dataSize - 1) && dataListSize > 1) {
280 animate = true;
281 int last = dataListSize - 1;
282 item.setXValue(series.getData().get(last).getXValue());
283 item.setYValue(series.getData().get(last).getYValue());
284 } else if (symbol != null) {
285 // fade out symbol
286 symbol.setOpacity(0);
287 FadeTransition ft = new FadeTransition(Duration.millis(500),symbol);
288 ft.setToValue(0);
289 ft.setOnFinished(actionEvent -> {
290 getPlotChildren().remove(symbol);
291 removeDataItemFromDisplay(series, item);
292 symbol.setOpacity(1.0);
293 });
294 ft.play();
295 }
296 if (animate) {
297 animate( new KeyFrame(Duration.ZERO, new KeyValue(item.currentYProperty(),
298 item.getCurrentY()), new KeyValue(item.currentXProperty(),
299 item.getCurrentX())),
300 new KeyFrame(Duration.millis(800), actionEvent -> {
301 getPlotChildren().remove(symbol);
302 removeDataItemFromDisplay(series, item);
303 },
304 new KeyValue(item.currentYProperty(),
305 item.getYValue(), Interpolator.EASE_BOTH),
306 new KeyValue(item.currentXProperty(),
307 item.getXValue(), Interpolator.EASE_BOTH))
308 );
309 }
310 } else {
311 getPlotChildren().remove(symbol);
312 removeDataItemFromDisplay(series, item);
313 }
314 //Note: better animation here, point should move from old position to new position at center point between prev and next symbols
315 }
316
317 /** @inheritDoc */
318 @Override protected void dataItemChanged(Data<X, Y> item) {
319 }
320
321 @Override protected void seriesChanged(ListChangeListener.Change<? extends Series> c) {
322 // Update style classes for all series lines and symbols
323 for (int i = 0; i < getDataSize(); i++) {
324 final Series<X,Y> s = getData().get(i);
325 Path seriesLine = (Path)((Group)s.getNode()).getChildren().get(1);
326 Path fillPath = (Path)((Group)s.getNode()).getChildren().get(0);
327 seriesLine.getStyleClass().setAll("chart-series-area-line", "series" + i, s.defaultColorStyleClass);
328 fillPath.getStyleClass().setAll("chart-series-area-fill", "series" + i, s.defaultColorStyleClass);
329 for (int j=0; j < s.getData().size(); j++) {
330 final Data<X,Y> item = s.getData().get(j);
331 final Node node = item.getNode();
332 if(node!=null) node.getStyleClass().setAll("chart-area-symbol", "series" + i, "data" + j, s.defaultColorStyleClass);
333 }
334 }
335 }
336
337 @Override protected void seriesAdded(Series<X,Y> series, int seriesIndex) {
338 // create new paths for series
339 Path seriesLine = new Path();
340 Path fillPath = new Path();
341 seriesLine.setStrokeLineJoin(StrokeLineJoin.BEVEL);
342 fillPath.setStrokeLineJoin(StrokeLineJoin.BEVEL);
343 Group areaGroup = new Group(fillPath,seriesLine);
344 series.setNode(areaGroup);
345 // create series Y multiplier
346 DoubleProperty seriesYAnimMultiplier = new SimpleDoubleProperty(this, "seriesYMultiplier");
347 seriesYMultiplierMap.put(series, seriesYAnimMultiplier);
348 // handle any data already in series
349 if (shouldAnimate()) {
350 seriesYAnimMultiplier.setValue(0d);
351 } else {
352 seriesYAnimMultiplier.setValue(1d);
353 }
354 getPlotChildren().add(areaGroup);
355 List<KeyFrame> keyFrames = new ArrayList<KeyFrame>();
356 if (shouldAnimate()) {
357 // animate in new series
358 keyFrames.add(new KeyFrame(Duration.ZERO,
359 new KeyValue(areaGroup.opacityProperty(), 0),
360 new KeyValue(seriesYAnimMultiplier, 0)
361 ));
362 keyFrames.add(new KeyFrame(Duration.millis(200),
363 new KeyValue(areaGroup.opacityProperty(), 1)
364 ));
365 keyFrames.add(new KeyFrame(Duration.millis(500),
366 new KeyValue(seriesYAnimMultiplier, 1)
367 ));
368 }
369 for (int j=0; j<series.getData().size(); j++) {
370 Data<X,Y> item = series.getData().get(j);
371 final Node symbol = createSymbol(series, seriesIndex, item, j);
372 if (symbol != null) {
373 if (shouldAnimate()) symbol.setOpacity(0);
374 getPlotChildren().add(symbol);
375 if (shouldAnimate()) {
376 // fade in new symbol
377 keyFrames.add(new KeyFrame(Duration.ZERO, new KeyValue(symbol.opacityProperty(), 0)));
378 keyFrames.add(new KeyFrame(Duration.millis(200), new KeyValue(symbol.opacityProperty(), 1)));
379 }
380 }
381 }
382 if (shouldAnimate()) animate(keyFrames.toArray(new KeyFrame[keyFrames.size()]));
383 }
384
385 @Override protected void seriesRemoved(final Series<X,Y> series) {
386 // remove series Y multiplier
387 seriesYMultiplierMap.remove(series);
388 // remove all symbol nodes
389 if (shouldAnimate()) {
390 Timeline tl = new Timeline(createSeriesRemoveTimeLine(series, 400));
391 tl.play();
392 } else {
393 getPlotChildren().remove(series.getNode());
394 for (Data<X,Y> d:series.getData()) getPlotChildren().remove(d.getNode());
395 removeSeriesFromDisplay(series);
396 }
397 }
398
399 /** @inheritDoc */
400 @Override protected void updateAxisRange() {
401 // This override is necessary to update axis range based on cumulative Y value for the
402 // Y axis instead of the normal way where max value in the data range is used.
403 final Axis<X> xa = getXAxis();
404 final Axis<Y> ya = getYAxis();
405 if (xa.isAutoRanging()) {
406 List xData = new ArrayList<Number>();
407 for(Series<X,Y> series : getData()) {
408 for(Data<X,Y> data: series.getData()) {
409 xData.add(data.getXValue());
410 }
411 }
412 xa.invalidateRange(xData);
413 }
414 if (ya.isAutoRanging()) {
415 double totalMinY = Double.MAX_VALUE;
416 Iterator<Series<X, Y>> seriesIterator = getDisplayedSeriesIterator();
417 boolean first = true;
418 NavigableMap<Double, Double> accum = new TreeMap<>();
419 NavigableMap<Double, Double> prevAccum = new TreeMap<>();
420 NavigableMap<Double, Double> currentValues = new TreeMap<>();
421 while (seriesIterator.hasNext()) {
422 currentValues.clear();
423 Series<X, Y> series = seriesIterator.next();
424 for(Data<X,Y> item : series.getData()) {
425 if(item != null) {
426 final double xv = xa.toNumericValue(item.getXValue());
427 final double yv = ya.toNumericValue(item.getYValue());
428 currentValues.put(xv, yv);
429 if (first) {
430 // On the first pass, just fill the map
431 accum.put(xv, yv);
432 // minimum is applicable only in the first series
433 totalMinY = Math.min(totalMinY, yv);
434 } else {
435 if (prevAccum.containsKey(xv)) {
436 accum.put(xv, prevAccum.get(xv) + yv);
437 } else {
438 // If the point wasn't yet in the previous (accumulated) series
439 Map.Entry<Double, Double> he = prevAccum.higherEntry(xv);
440 Map.Entry<Double, Double> le = prevAccum.lowerEntry(xv);
441 if (he != null && le != null) {
442 // If there's both point above and below this point, interpolate
443 accum.put(xv, ((xv - le.getKey()) / (he.getKey() - le.getKey())) *
444 (le.getValue() + he.getValue()) + yv);
445 } else if (he != null) {
446 // The point is before the first point in the previously accumulated series
447 accum.put(xv, he.getValue() + yv);
448 } else if (le != null) {
449 // The point is after the last point in the previously accumulated series
450 accum.put(xv, le.getValue() + yv);
451 } else {
452 // The previously accumulated series is empty
453 accum.put(xv, yv);
454 }
455 }
456 }
457 }
458 }
459 // Now update all the keys that were in the previous series, but not in the new one
460 for (Map.Entry<Double, Double> e : prevAccum.entrySet()) {
461 if (accum.keySet().contains(e.getKey())) {
462 continue;
463 }
464 Double k = e.getKey();
465 final Double v = e.getValue();
466 // Look at the values of the current series
467 Map.Entry<Double, Double> he = currentValues.higherEntry(k);
468 Map.Entry<Double, Double> le = currentValues.lowerEntry(k);
469 if (he != null && le != null) {
470 // Interpolate the for the point from current series and add the accumulated value
471 accum.put(k, ((k - le.getKey()) / (he.getKey() - le.getKey())) *
472 (le.getValue() + he.getValue()) + v);
473 } else if (he != null) {
474 // There accumulated value is before the first value in the current series
475 accum.put(k, he.getValue() + v);
476 } else if (le != null) {
477 // There accumulated value is after the last value in the current series
478 accum.put(k, le.getValue() + v);
479 } else {
480 // The current series are empty
481 accum.put(k, v);
482 }
483
484 }
485
486 prevAccum.clear();
487 prevAccum.putAll(accum);
488 accum.clear();
489 first = (totalMinY == Double.MAX_VALUE); // If there was already some value in the series, we can consider as
490 // being past the first series
491
492 }
493 if(totalMinY != Double.MAX_VALUE) ya.invalidateRange(Arrays.asList(ya.toRealValue(totalMinY),
494 ya.toRealValue(Collections.max(prevAccum.values()))));
495
496 }
497 }
498
499
500 /** @inheritDoc */
501 @Override protected void layoutPlotChildren() {
502 ArrayList<DataPointInfo<X, Y>> currentSeriesData = new ArrayList<>();
503 // AggregateData hold the data points of both the current and the previous series.
504 // The goal is to collect all the data, sort it and iterate.
505 ArrayList<DataPointInfo<X, Y>> aggregateData = new ArrayList<>();
506 for (int seriesIndex=0; seriesIndex < getDataSize(); seriesIndex++) { // for every series
507 Series<X, Y> series = getData().get(seriesIndex);
508 aggregateData.clear();
509 // copy currentSeriesData accumulated in the previous iteration to aggregate.
510 for(DataPointInfo<X, Y> data : currentSeriesData) {
511 data.partOf = PartOf.PREVIOUS;
512 aggregateData.add(data);
513 }
514 currentSeriesData.clear();
515 // now copy actual data of the current series.
516 for (Iterator<Data<X, Y>> it = getDisplayedDataIterator(series); it.hasNext(); ) {
517 Data<X, Y> item = it.next();
518 DataPointInfo<X, Y> itemInfo = new DataPointInfo<>(item, item.getXValue(),
519 item.getYValue(), PartOf.CURRENT);
520 aggregateData.add(itemInfo);
521 }
522 DoubleProperty seriesYAnimMultiplier = seriesYMultiplierMap.get(series);
523 Path seriesLine = (Path)((Group)series.getNode()).getChildren().get(1);
524 Path fillPath = (Path)((Group)series.getNode()).getChildren().get(0);
525 seriesLine.getElements().clear();
526 fillPath.getElements().clear();
527 int dataIndex = 0;
528 // Sort data points from prev and current series
529 sortAggregateList(aggregateData);
530
531 Axis<Y> yAxis = getYAxis();
532 Axis<X> xAxis = getXAxis();
533 boolean firstCurrent = false;
534 boolean lastCurrent = false;
535 int firstCurrentIndex = findNextCurrent(aggregateData, -1);
536 int lastCurrentIndex = findPreviousCurrent(aggregateData, aggregateData.size());
537 double basePosition = yAxis.getZeroPosition();
538 if (Double.isNaN(basePosition)) {
539 ValueAxis<Number> valueYAxis = (ValueAxis<Number>) yAxis;
540 if (valueYAxis.getLowerBound() > 0) {
541 basePosition = valueYAxis.getDisplayPosition(valueYAxis.getLowerBound());
542 } else {
543 basePosition = valueYAxis.getDisplayPosition(valueYAxis.getUpperBound());
544 }
545 }
546 // Iterate over the aggregate data : this process accumulates data points
547 // cumulatively from the bottom to top of stack
548
549 for (DataPointInfo<X, Y> dataInfo : aggregateData) {
550 if (dataIndex == lastCurrentIndex) lastCurrent = true;
551 if (dataIndex == firstCurrentIndex) firstCurrent = true;
552 final Data<X,Y> item = dataInfo.dataItem;
553 if (dataInfo.partOf.equals(PartOf.CURRENT)) { // handle data from current series
554 int pIndex = findPreviousPrevious(aggregateData, dataIndex);
555 int nIndex = findNextPrevious(aggregateData, dataIndex);
556 DataPointInfo<X, Y> prevPoint;
557 DataPointInfo<X, Y> nextPoint;
558 if (pIndex == -1 || (nIndex == -1 && !(aggregateData.get(pIndex).x.equals(dataInfo.x)))) {
559 if (firstCurrent) {
560 // Need to add the drop down point.
561 Data<X, Y> ddItem = new Data(dataInfo.x, 0);
562 addDropDown(currentSeriesData, ddItem, ddItem.getXValue(), ddItem.getYValue(),
563 xAxis.getDisplayPosition(ddItem.getCurrentX()), basePosition);
564 }
565 double x = xAxis.getDisplayPosition(item.getCurrentX());
566 double y = yAxis.getDisplayPosition(
567 yAxis.toRealValue(yAxis.toNumericValue(item.getCurrentY()) * seriesYAnimMultiplier.getValue()));
568 addPoint(currentSeriesData, item, item.getXValue(), item.getYValue(), x, y,
569 PartOf.CURRENT, false, (firstCurrent) ? false : true);
570 if (dataIndex == lastCurrentIndex) {
571 // need to add drop down point
572 Data<X, Y> ddItem = new Data(dataInfo.x, 0);
573 addDropDown(currentSeriesData, ddItem, ddItem.getXValue(), ddItem.getYValue(),
574 xAxis.getDisplayPosition(ddItem.getCurrentX()), basePosition);
575 }
576 } else {
577 prevPoint = aggregateData.get(pIndex);
578 if (prevPoint.x.equals(dataInfo.x)) { // Need to add Y values
579 // Check if prevPoint is a dropdown - as the stable sort preserves the order.
580 // If so, find the non dropdown previous point on previous series.
581 if (prevPoint.dropDown) {
582 pIndex = findPreviousPrevious(aggregateData, pIndex);
583 prevPoint = aggregateData.get(pIndex);
584 // If lastCurrent - add this drop down
585 }
586 if (prevPoint.x.equals(dataInfo.x)) { // simply add
587 double x = xAxis.getDisplayPosition(item.getCurrentX());
588 final double yv = yAxis.toNumericValue(item.getCurrentY()) + yAxis.toNumericValue(prevPoint.y);
589 double y = yAxis.getDisplayPosition(
590 yAxis.toRealValue(yv * seriesYAnimMultiplier.getValue()));
591 addPoint(currentSeriesData, item, dataInfo.x, yAxis.toRealValue(yv), x, y, PartOf.CURRENT, false,
592 (firstCurrent) ? false : true);
593 }
594 if (lastCurrent) {
595 addDropDown(currentSeriesData, item, prevPoint.x, prevPoint.y, prevPoint.displayX, prevPoint.displayY);
596 }
597 } else {
598 // interpolate
599 nextPoint = (nIndex == -1) ? null : aggregateData.get(nIndex);
600 prevPoint = (pIndex == -1) ? null : aggregateData.get(pIndex);
601 final double yValue = yAxis.toNumericValue(item.getCurrentY());
602 if (prevPoint != null && nextPoint != null) {
603 double x = xAxis.getDisplayPosition(item.getCurrentX());
604 double displayY = interpolate(prevPoint.displayX,
605 prevPoint.displayY, nextPoint.displayX, nextPoint.displayY, x);
606 double dataY = interpolate(xAxis.toNumericValue(prevPoint.x),
607 yAxis.toNumericValue(prevPoint.y),
608 xAxis.toNumericValue(nextPoint.x),
609 yAxis.toNumericValue(nextPoint.y),
610 xAxis.toNumericValue(dataInfo.x));
611 if (firstCurrent) {
612 // now create the drop down point
613 Data<X, Y> ddItem = new Data(dataInfo.x, dataY);
614 addDropDown(currentSeriesData, ddItem, dataInfo.x, yAxis.toRealValue(dataY), x, displayY);
615 }
616 double y = yAxis.getDisplayPosition(yAxis.toRealValue((yValue + dataY) * seriesYAnimMultiplier.getValue()));
617 // Add the current point
618 addPoint(currentSeriesData, item, dataInfo.x, yAxis.toRealValue(yValue + dataY), x, y, PartOf.CURRENT, false,
619 (firstCurrent) ? false : true);
620 if (dataIndex == lastCurrentIndex) {
621 // add drop down point
622 Data<X, Y> ddItem = new Data(dataInfo.x, dataY);
623 addDropDown(currentSeriesData, ddItem, dataInfo.x, yAxis.toRealValue(dataY), x, displayY);
624 }
625 // Note: add drop down if last current
626 }
627 else {
628 // we do not need to take care of this as it is
629 // already handled above with check of if(pIndex == -1 or nIndex == -1)
630 }
631 }
632 }
633
634 } else { // handle data from Previous series.
635 int pIndex = findPreviousCurrent(aggregateData, dataIndex);
636 int nIndex = findNextCurrent(aggregateData, dataIndex);
637 DataPointInfo<X, Y> prevPoint;
638 DataPointInfo<X, Y> nextPoint;
639 if (dataInfo.dropDown) {
640 if (xAxis.toNumericValue(dataInfo.x) <=
641 xAxis.toNumericValue(aggregateData.get(firstCurrentIndex).x) ||
642 xAxis.toNumericValue(dataInfo.x) > xAxis.toNumericValue(aggregateData.get(lastCurrentIndex).x)) {
643 addDropDown(currentSeriesData, item, dataInfo.x, dataInfo.y, dataInfo.displayX, dataInfo.displayY);
644 }
645 } else {
646 if (pIndex == -1 || nIndex == -1) {
647 addPoint(currentSeriesData, item, dataInfo.x, dataInfo.y, dataInfo.displayX, dataInfo.displayY,
648 PartOf.CURRENT, true, false);
649 } else {
650 nextPoint = aggregateData.get(nIndex);
651 if (nextPoint.x.equals(dataInfo.x)) {
652 // do nothing as the current point is already there.
653 } else {
654 // interpolate on the current series.
655 prevPoint = aggregateData.get(pIndex);
656 double x = xAxis.getDisplayPosition(item.getCurrentX());
657 double dataY = interpolate(xAxis.toNumericValue(prevPoint.x),
658 yAxis.toNumericValue(prevPoint.y),
659 xAxis.toNumericValue(nextPoint.x),
660 yAxis.toNumericValue(nextPoint.y),
661 xAxis.toNumericValue(dataInfo.x));
662 final double yv = yAxis.toNumericValue(dataInfo.y) + dataY;
663 double y = yAxis.getDisplayPosition(
664 yAxis.toRealValue(yv * seriesYAnimMultiplier.getValue()));
665 addPoint(currentSeriesData, new Data(dataInfo.x, dataY), dataInfo.x, yAxis.toRealValue(yv), x, y, PartOf.CURRENT, true, true);
666 }
667 }
668 }
669 }
670 dataIndex++;
671 if (firstCurrent) firstCurrent = false;
672 if (lastCurrent) lastCurrent = false;
673 } // end of inner for loop
674
675 // Draw the SeriesLine and Series fill
676 if (!currentSeriesData.isEmpty()) {
677 seriesLine.getElements().add(new MoveTo(currentSeriesData.get(0).displayX, currentSeriesData.get(0).displayY));
678 fillPath.getElements().add(new MoveTo(currentSeriesData.get(0).displayX, currentSeriesData.get(0).displayY));
679 }
680 for (DataPointInfo<X, Y> point : currentSeriesData) {
681 if (point.lineTo) {
682 seriesLine.getElements().add(new LineTo(point.displayX, point.displayY));
683 } else {
684 seriesLine.getElements().add(new MoveTo(point.displayX, point.displayY));
685 }
686 fillPath.getElements().add(new LineTo(point.displayX, point.displayY));
687 // draw symbols only for actual data points and skip for interpolated points.
688 if (!point.skipSymbol) {
689 Node symbol = point.dataItem.getNode();
690 if (symbol != null) {
691 final double w = symbol.prefWidth(-1);
692 final double h = symbol.prefHeight(-1);
693 symbol.resizeRelocate(point.displayX-(w/2), point.displayY-(h/2),w,h);
694 }
695 }
696 }
697 for(int i = aggregateData.size()-1; i > 0; i--) {
698 DataPointInfo<X, Y> point = aggregateData.get(i);
699 if (PartOf.PREVIOUS.equals(point.partOf)) {
700 fillPath.getElements().add(new LineTo(point.displayX, point.displayY));
701 }
702 }
703 if (!fillPath.getElements().isEmpty()) {
704 fillPath.getElements().add(new ClosePath());
705 }
706
707 } // end of out for loop
708 }
709
710 private void addDropDown(ArrayList<DataPointInfo<X, Y>> currentSeriesData, Data<X, Y> item, X xValue, Y yValue, double x, double y) {
711 DataPointInfo<X, Y> dropDownDataPoint = new DataPointInfo<>(true);
712 dropDownDataPoint.setValues(item, xValue, yValue, x, y, PartOf.CURRENT, true, false);
713 currentSeriesData.add(dropDownDataPoint);
714 }
715
716 private void addPoint(ArrayList<DataPointInfo<X, Y>> currentSeriesData, Data<X, Y> item, X xValue, Y yValue, double x, double y, PartOf partof,
717 boolean symbol, boolean lineTo) {
718 DataPointInfo<X, Y> currentDataPoint = new DataPointInfo<>();
719 currentDataPoint.setValues(item, xValue, yValue, x, y, partof, symbol, lineTo);
720 currentSeriesData.add(currentDataPoint);
721 }
722
723 //-------------------- helper methods to retrieve data points from the previous
724 // or current data series.
725 private int findNextCurrent(ArrayList<DataPointInfo<X, Y>> points, int index) {
726 for(int i = index+1; i < points.size(); i++) {
727 if (points.get(i).partOf.equals(PartOf.CURRENT)) {
728 return i;
729 }
730 }
731 return -1;
732 }
733
734 private int findPreviousCurrent(ArrayList<DataPointInfo<X, Y>> points, int index) {
735 for(int i = index-1; i >= 0; i--) {
736 if (points.get(i).partOf.equals(PartOf.CURRENT)) {
737 return i;
738 }
739 }
740 return -1;
741 }
742
743
744 private int findPreviousPrevious(ArrayList<DataPointInfo<X, Y>> points, int index) {
745 for(int i = index-1; i >= 0; i--) {
746 if (points.get(i).partOf.equals(PartOf.PREVIOUS)) {
747 return i;
748 }
749 }
750 return -1;
751 }
752 private int findNextPrevious(ArrayList<DataPointInfo<X, Y>> points, int index) {
753 for(int i = index+1; i < points.size(); i++) {
754 if (points.get(i).partOf.equals(PartOf.PREVIOUS)) {
755 return i;
756 }
757 }
758 return -1;
759 }
760
761
762 private void sortAggregateList(ArrayList<DataPointInfo<X, Y>> aggregateList) {
763 Collections.sort(aggregateList, (o1, o2) -> {
764 Data<X,Y> d1 = o1.dataItem;
765 Data<X,Y> d2 = o2.dataItem;
766 double val1 = getXAxis().toNumericValue(d1.getXValue());
767 double val2 = getXAxis().toNumericValue(d2.getXValue());
768 return (val1 < val2 ? -1 : ( val1 == val2) ? 0 : 1);
769 });
770 }
771
772 private double interpolate(double lowX, double lowY, double highX, double highY, double x) {
773 // using y = mx+c find the y for the given x.
774 return (((highY - lowY)/(highX - lowX))*(x - lowX))+lowY;
775 }
776
777 private Node createSymbol(Series<X,Y> series, int seriesIndex, final Data<X,Y> item, int itemIndex) {
778 Node symbol = item.getNode();
779 // check if symbol has already been created
780 if (symbol == null && getCreateSymbols()) {
781 symbol = new StackPane();
782 symbol.setAccessibleRole(AccessibleRole.TEXT);
783 symbol.setAccessibleRoleDescription("Point");
784 symbol.focusTraversableProperty().bind(Platform.accessibilityActiveProperty());
785 item.setNode(symbol);
786 }
787 // set symbol styles
788 // Note not sure if we want to add or check, ie be more careful and efficient here
789 if (symbol != null) symbol.getStyleClass().setAll("chart-area-symbol", "series" + seriesIndex, "data" + itemIndex,
790 series.defaultColorStyleClass);
791 return symbol;
792 }
793
794 /**
795 * This is called whenever a series is added or removed and the legend needs to be updated
796 */
797 @Override protected void updateLegend() {
798 legend.getItems().clear();
799 if (getData() != null) {
800 for (int seriesIndex=0; seriesIndex < getData().size(); seriesIndex++) {
801 Series<X,Y> series = getData().get(seriesIndex);
802 LegendItem legenditem = new LegendItem(series.getName());
803 legenditem.getSymbol().getStyleClass().addAll("chart-area-symbol","series"+seriesIndex,
804 "area-legend-symbol", series.defaultColorStyleClass);
805 legend.getItems().add(legenditem);
806 }
807 }
808 if (legend.getItems().size() > 0) {
809 if (getLegend() == null) {
810 setLegend(legend);
811 }
812 } else {
813 setLegend(null);
814 }
815 }
816
817 // -------------- INNER CLASSES --------------------------------------------
818 /*
819 * Helper class to hold data and display and other information for each
820 * data point
821 */
822 final static class DataPointInfo<X, Y> {
823 X x;
824 Y y;
825 double displayX;
826 double displayY;
827 Data<X,Y> dataItem;
828 PartOf partOf;
829 boolean skipSymbol = false; // interpolated point - skip drawing symbol
830 boolean lineTo = false; // should there be a lineTo to this point on SeriesLine.
831 boolean dropDown = false; // Is this a drop down point ( non data point).
832
833 //----- Constructors --------------------
834 DataPointInfo() {}
835
836 DataPointInfo(Data<X,Y> item, X x, Y y, PartOf partOf) {
837 this.dataItem = item;
838 this.x = x;
839 this.y = y;
840 this.partOf = partOf;
841 }
842
843 DataPointInfo(boolean dropDown) {
844 this.dropDown = dropDown;
845 }
846
847 void setValues(Data<X,Y> item, X x, Y y, double dx, double dy,
848 PartOf partOf, boolean skipSymbol, boolean lineTo) {
849 this.dataItem = item;
850 this.x = x;
851 this.y = y;
852 this.displayX = dx;
853 this.displayY = dy;
854 this.partOf = partOf;
855 this.skipSymbol = skipSymbol;
856 this.lineTo = lineTo;
857 }
858
859 public final X getX() {
860 return x;
861 }
862
863 public final Y getY() {
864 return y;
865 }
866 }
867
868 // To indicate if the data point belongs to the current or the previous series.
869 private static enum PartOf {
870 CURRENT,
871 PREVIOUS
872 }
873
874 // -------------- STYLESHEET HANDLING --------------------------------------
875
876 private static class StyleableProperties {
877
878 private static final CssMetaData<StackedAreaChart<?, ?>, Boolean> CREATE_SYMBOLS =
879 new CssMetaData<StackedAreaChart<?, ?>, Boolean>("-fx-create-symbols",
880 BooleanConverter.getInstance(), Boolean.TRUE) {
881 @Override
882 public boolean isSettable(StackedAreaChart<?,?> node) {
883 return node.createSymbols == null || !node.createSymbols.isBound();
884 }
885
886 @Override
887 public StyleableProperty<Boolean> getStyleableProperty(StackedAreaChart<?,?> node) {
888 return (StyleableProperty<Boolean>)(WritableValue<Boolean>)node.createSymbolsProperty();
889 }
890 };
891
892 private static final List<CssMetaData<? extends Styleable, ?>> STYLEABLES;
893
894 static {
895 final List<CssMetaData<? extends Styleable, ?>> styleables =
896 new ArrayList<CssMetaData<? extends Styleable, ?>>(XYChart.getClassCssMetaData());
897 styleables.add(CREATE_SYMBOLS);
898 STYLEABLES = Collections.unmodifiableList(styleables);
899
900 }
901 }
902
903 /**
904 * @return The CssMetaData associated with this class, which may include the
905 * CssMetaData of its super classes.
906 * @since JavaFX 8.0
907 */
908 public static List<CssMetaData<? extends Styleable, ?>> getClassCssMetaData() {
909 return StyleableProperties.STYLEABLES;
910 }
911
912 /**
913 * {@inheritDoc}
914 * @since JavaFX 8.0
915 */
916 @Override
917 public List<CssMetaData<? extends Styleable, ?>> getCssMetaData() {
918 return getClassCssMetaData();
919 }
920
921 }