javafx.scene.chart.StackedAreaChart Maven / Gradle / Ivy
/*
* Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javafx.scene.chart;
import java.util.*;
import javafx.animation.*;
import javafx.application.Platform;
import javafx.beans.NamedArg;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.scene.AccessibleRole;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.layout.StackPane;
import javafx.scene.shape.*;
import javafx.util.Duration;
import com.sun.javafx.charts.Legend.LegendItem;
import javafx.css.converter.BooleanConverter;
import javafx.beans.property.BooleanProperty;
import javafx.css.CssMetaData;
import javafx.css.Styleable;
import javafx.css.StyleableBooleanProperty;
import javafx.css.StyleableProperty;
/**
* StackedAreaChart is a variation of {@link AreaChart} that displays trends of the
* contribution of each value. (over time e.g.) The areas are stacked so that each
* series adjoins but does not overlap the preceding series. This contrasts with
* the Area chart where each series overlays the preceding series.
*
* The cumulative nature of the StackedAreaChart gives an idea of the total Y data
* value at any given point along the X axis.
*
* Since data points across multiple series may not be common, StackedAreaChart
* interpolates values along the line joining the data points whenever necessary.
*
* @since JavaFX 2.1
*/
public class StackedAreaChart extends XYChart {
// -------------- PRIVATE FIELDS ------------------------------------------
/** A multiplier for teh Y values that we store for each series, it is used to animate in a new series */
private Map, DoubleProperty> seriesYMultiplierMap = new HashMap<>();
private Timeline timeline;
// -------------- PUBLIC PROPERTIES ----------------------------------------
/**
* When true, CSS styleable symbols are created for any data items that
* don't have a symbol node specified.
* @since JavaFX 8.0
*/
private BooleanProperty createSymbols = new StyleableBooleanProperty(true) {
@Override
protected void invalidated() {
for (int seriesIndex = 0; seriesIndex < getData().size(); seriesIndex++) {
Series series = getData().get(seriesIndex);
for (int itemIndex = 0; itemIndex < series.getData().size(); itemIndex++) {
Data item = series.getData().get(itemIndex);
Node symbol = item.getNode();
if (get() && symbol == null) { // create any symbols
symbol = createSymbol(series, getData().indexOf(series), item, itemIndex);
if (null != symbol) {
getPlotChildren().add(symbol);
}
} else if (!get() && symbol != null) { // remove symbols
getPlotChildren().remove(symbol);
symbol = null;
item.setNode(null);
}
}
}
requestChartLayout();
}
@Override
public Object getBean() {
return this;
}
@Override
public String getName() {
return "createSymbols";
}
@Override
public CssMetaData,Boolean> getCssMetaData() {
return StyleableProperties.CREATE_SYMBOLS;
}
};
/**
* Indicates whether symbols for data points will be created or not.
*
* @return true if symbols for data points will be created and false otherwise.
* @since JavaFX 8.0
*/
public final boolean getCreateSymbols() { return createSymbols.getValue(); }
public final void setCreateSymbols(boolean value) { createSymbols.setValue(value); }
public final BooleanProperty createSymbolsProperty() { return createSymbols; }
// -------------- CONSTRUCTORS ----------------------------------------------
/**
* Construct a new Area Chart with the given axis
*
* @param xAxis The x axis to use
* @param yAxis The y axis to use
*/
public StackedAreaChart(@NamedArg("xAxis") Axis xAxis, @NamedArg("yAxis") Axis yAxis) {
this(xAxis,yAxis, FXCollections.>observableArrayList());
}
/**
* Construct a new Area Chart with the given axis and data.
*
* Note: yAxis must be a ValueAxis, otherwise {@code IllegalArgumentException} is thrown.
*
* @param xAxis The x axis to use
* @param yAxis The y axis to use
* @param data The data to use, this is the actual list used so any changes to it will be reflected in the chart
*
* @throws java.lang.IllegalArgumentException if yAxis is not a ValueAxis
*/
public StackedAreaChart(@NamedArg("xAxis") Axis xAxis, @NamedArg("yAxis") Axis yAxis, @NamedArg("data") ObservableList> data) {
super(xAxis,yAxis);
if (!(yAxis instanceof ValueAxis)) {
throw new IllegalArgumentException("Axis type incorrect, yAxis must be of ValueAxis type.");
}
setData(data);
}
// -------------- METHODS ------------------------------------------------------------------------------------------
private static double doubleValue(Number number) { return doubleValue(number, 0); }
private static double doubleValue(Number number, double nullDefault) {
return (number == null) ? nullDefault : number.doubleValue();
}
@Override protected void dataItemAdded(Series series, int itemIndex, Data item) {
final Node symbol = createSymbol(series, getData().indexOf(series), item, itemIndex);
if (shouldAnimate()) {
boolean animate = false;
if (itemIndex > 0 && itemIndex < (series.getData().size()-1)) {
animate = true;
Data p1 = series.getData().get(itemIndex - 1);
Data p2 = series.getData().get(itemIndex + 1);
double x1 = getXAxis().toNumericValue(p1.getXValue());
double y1 = getYAxis().toNumericValue(p1.getYValue());
double x3 = getXAxis().toNumericValue(p2.getXValue());
double y3 = getYAxis().toNumericValue(p2.getYValue());
double x2 = getXAxis().toNumericValue(item.getXValue());
double y2 = getYAxis().toNumericValue(item.getYValue());
// //1. y intercept of the line : y = ((y3-y1)/(x3-x1)) * x2 + (x3y1 - y3x1)/(x3 -x1)
double y = ((y3-y1)/(x3-x1)) * x2 + (x3*y1 - y3*x1)/(x3-x1);
item.setCurrentY(getYAxis().toRealValue(y));
item.setCurrentX(getXAxis().toRealValue(x2));
//2. we can simply use the midpoint on the line as well..
// double x = (x3 + x1)/2;
// double y = (y3 + y1)/2;
// item.setCurrentX(x);
// item.setCurrentY(y);
} else if (itemIndex == 0 && series.getData().size() > 1) {
animate = true;
item.setCurrentX(series.getData().get(1).getXValue());
item.setCurrentY(series.getData().get(1).getYValue());
} else if (itemIndex == (series.getData().size() - 1) && series.getData().size() > 1) {
animate = true;
int last = series.getData().size() - 2;
item.setCurrentX(series.getData().get(last).getXValue());
item.setCurrentY(series.getData().get(last).getYValue());
} else if (symbol != null) {
// fade in new symbol
symbol.setOpacity(0);
getPlotChildren().add(symbol);
FadeTransition ft = new FadeTransition(Duration.millis(500),symbol);
ft.setToValue(1);
ft.play();
}
if (animate) {
animate(
new KeyFrame(Duration.ZERO,
(e) -> {
if (symbol != null && !getPlotChildren().contains(symbol)) {
getPlotChildren().add(symbol);
} },
new KeyValue(item.currentYProperty(),
item.getCurrentY()),
new KeyValue(item.currentXProperty(),
item.getCurrentX())
),
new KeyFrame(Duration.millis(800), new KeyValue(item.currentYProperty(),
item.getYValue(), Interpolator.EASE_BOTH),
new KeyValue(item.currentXProperty(),
item.getXValue(), Interpolator.EASE_BOTH))
);
}
} else if (symbol != null) {
getPlotChildren().add(symbol);
}
}
@Override protected void dataItemRemoved(final Data item, final Series series) {
final Node symbol = item.getNode();
if (symbol != null) {
symbol.focusTraversableProperty().unbind();
}
// remove item from sorted list
int itemIndex = series.getItemIndex(item);
if (shouldAnimate()) {
boolean animate = false;
// dataSize represents size of currently visible data. After this operation, the number will decrement by 1
final int dataSize = series.getDataSize();
// This is the size of current data list in Series. Note that it might be totaly different from dataSize as
// some big operation might have happened on the list.
final int dataListSize = series.getData().size();
if (itemIndex > 0 && itemIndex < dataSize - 1) {
animate = true;
Data p1 = series.getItem(itemIndex - 1);
Data p2 = series.getItem(itemIndex + 1);
double x1 = getXAxis().toNumericValue(p1.getXValue());
double y1 = getYAxis().toNumericValue(p1.getYValue());
double x3 = getXAxis().toNumericValue(p2.getXValue());
double y3 = getYAxis().toNumericValue(p2.getYValue());
double x2 = getXAxis().toNumericValue(item.getXValue());
double y2 = getYAxis().toNumericValue(item.getYValue());
// //1. y intercept of the line : y = ((y3-y1)/(x3-x1)) * x2 + (x3y1 - y3x1)/(x3 -x1)
double y = ((y3-y1)/(x3-x1)) * x2 + (x3*y1 - y3*x1)/(x3-x1);
item.setCurrentX(getXAxis().toRealValue(x2));
item.setCurrentY(getYAxis().toRealValue(y2));
item.setXValue(getXAxis().toRealValue(x2));
item.setYValue(getYAxis().toRealValue(y));
//2. we can simply use the midpoint on the line as well..
// double x = (x3 + x1)/2;
// double y = (y3 + y1)/2;
// item.setCurrentX(x);
// item.setCurrentY(y);
} else if (itemIndex == 0 && dataListSize > 1) {
animate = true;
item.setXValue(series.getData().get(0).getXValue());
item.setYValue(series.getData().get(0).getYValue());
} else if (itemIndex == (dataSize - 1) && dataListSize > 1) {
animate = true;
int last = dataListSize - 1;
item.setXValue(series.getData().get(last).getXValue());
item.setYValue(series.getData().get(last).getYValue());
} else if (symbol != null) {
// fade out symbol
symbol.setOpacity(0);
FadeTransition ft = new FadeTransition(Duration.millis(500),symbol);
ft.setToValue(0);
ft.setOnFinished(actionEvent -> {
getPlotChildren().remove(symbol);
removeDataItemFromDisplay(series, item);
symbol.setOpacity(1.0);
});
ft.play();
} else {
item.setSeries(null);
removeDataItemFromDisplay(series, item);
}
if (animate) {
animate( new KeyFrame(Duration.ZERO, new KeyValue(item.currentYProperty(),
item.getCurrentY()), new KeyValue(item.currentXProperty(),
item.getCurrentX())),
new KeyFrame(Duration.millis(800), actionEvent -> {
getPlotChildren().remove(symbol);
removeDataItemFromDisplay(series, item);
},
new KeyValue(item.currentYProperty(),
item.getYValue(), Interpolator.EASE_BOTH),
new KeyValue(item.currentXProperty(),
item.getXValue(), Interpolator.EASE_BOTH))
);
}
} else {
getPlotChildren().remove(symbol);
removeDataItemFromDisplay(series, item);
}
//Note: better animation here, point should move from old position to new position at center point between prev and next symbols
}
/** {@inheritDoc} */
@Override protected void dataItemChanged(Data item) {
}
@Override protected void seriesChanged(ListChangeListener.Change c) {
// Update style classes for all series lines and symbols
for (int i = 0; i < getDataSize(); i++) {
final Series s = getData().get(i);
Path seriesLine = (Path)((Group)s.getNode()).getChildren().get(1);
Path fillPath = (Path)((Group)s.getNode()).getChildren().get(0);
seriesLine.getStyleClass().setAll("chart-series-area-line", "series" + i, s.defaultColorStyleClass);
fillPath.getStyleClass().setAll("chart-series-area-fill", "series" + i, s.defaultColorStyleClass);
for (int j=0; j < s.getData().size(); j++) {
final Data item = s.getData().get(j);
final Node node = item.getNode();
if(node!=null) node.getStyleClass().setAll("chart-area-symbol", "series" + i, "data" + j, s.defaultColorStyleClass);
}
}
}
@Override protected void seriesAdded(Series series, int seriesIndex) {
// create new paths for series
Path seriesLine = new Path();
Path fillPath = new Path();
seriesLine.setStrokeLineJoin(StrokeLineJoin.BEVEL);
fillPath.setStrokeLineJoin(StrokeLineJoin.BEVEL);
Group areaGroup = new Group(fillPath,seriesLine);
series.setNode(areaGroup);
// create series Y multiplier
DoubleProperty seriesYAnimMultiplier = new SimpleDoubleProperty(this, "seriesYMultiplier");
seriesYMultiplierMap.put(series, seriesYAnimMultiplier);
// handle any data already in series
if (shouldAnimate()) {
seriesYAnimMultiplier.setValue(0d);
} else {
seriesYAnimMultiplier.setValue(1d);
}
getPlotChildren().add(areaGroup);
List keyFrames = new ArrayList<>();
if (shouldAnimate()) {
// animate in new series
keyFrames.add(new KeyFrame(Duration.ZERO,
new KeyValue(areaGroup.opacityProperty(), 0),
new KeyValue(seriesYAnimMultiplier, 0)
));
keyFrames.add(new KeyFrame(Duration.millis(200),
new KeyValue(areaGroup.opacityProperty(), 1)
));
keyFrames.add(new KeyFrame(Duration.millis(500),
new KeyValue(seriesYAnimMultiplier, 1)
));
}
for (int j=0; j item = series.getData().get(j);
final Node symbol = createSymbol(series, seriesIndex, item, j);
if (symbol != null) {
if (shouldAnimate()) symbol.setOpacity(0);
getPlotChildren().add(symbol);
if (shouldAnimate()) {
// fade in new symbol
keyFrames.add(new KeyFrame(Duration.ZERO, new KeyValue(symbol.opacityProperty(), 0)));
keyFrames.add(new KeyFrame(Duration.millis(200), new KeyValue(symbol.opacityProperty(), 1)));
}
}
}
if (shouldAnimate()) animate(keyFrames.toArray(new KeyFrame[keyFrames.size()]));
}
@Override protected void seriesRemoved(final Series series) {
// remove series Y multiplier
seriesYMultiplierMap.remove(series);
// remove all symbol nodes
if (shouldAnimate()) {
timeline = new Timeline(createSeriesRemoveTimeLine(series, 400));
timeline.play();
} else {
getPlotChildren().remove(series.getNode());
for (Data d:series.getData()) getPlotChildren().remove(d.getNode());
removeSeriesFromDisplay(series);
}
}
/** {@inheritDoc} */
@Override protected void updateAxisRange() {
// This override is necessary to update axis range based on cumulative Y value for the
// Y axis instead of the normal way where max value in the data range is used.
final Axis xa = getXAxis();
final Axis ya = getYAxis();
if (xa.isAutoRanging()) {
List xData = new ArrayList();
for(Series series : getData()) {
for(Data data: series.getData()) {
xData.add(data.getXValue());
}
}
xa.invalidateRange(xData);
}
if (ya.isAutoRanging()) {
double totalMinY = Double.MAX_VALUE;
Iterator> seriesIterator = getDisplayedSeriesIterator();
boolean first = true;
NavigableMap accum = new TreeMap<>();
NavigableMap prevAccum = new TreeMap<>();
NavigableMap currentValues = new TreeMap<>();
while (seriesIterator.hasNext()) {
currentValues.clear();
Series series = seriesIterator.next();
for(Data item : series.getData()) {
if(item != null) {
final double xv = xa.toNumericValue(item.getXValue());
final double yv = ya.toNumericValue(item.getYValue());
currentValues.put(xv, yv);
if (first) {
// On the first pass, just fill the map
accum.put(xv, yv);
// minimum is applicable only in the first series
totalMinY = Math.min(totalMinY, yv);
} else {
if (prevAccum.containsKey(xv)) {
accum.put(xv, prevAccum.get(xv) + yv);
} else {
// If the point wasn't yet in the previous (accumulated) series
Map.Entry he = prevAccum.higherEntry(xv);
Map.Entry le = prevAccum.lowerEntry(xv);
if (he != null && le != null) {
// If there's both point above and below this point, interpolate
accum.put(xv, ((xv - le.getKey()) / (he.getKey() - le.getKey())) *
(le.getValue() + he.getValue()) + yv);
} else if (he != null) {
// The point is before the first point in the previously accumulated series
accum.put(xv, he.getValue() + yv);
} else if (le != null) {
// The point is after the last point in the previously accumulated series
accum.put(xv, le.getValue() + yv);
} else {
// The previously accumulated series is empty
accum.put(xv, yv);
}
}
}
}
}
// Now update all the keys that were in the previous series, but not in the new one
for (Map.Entry e : prevAccum.entrySet()) {
if (accum.keySet().contains(e.getKey())) {
continue;
}
Double k = e.getKey();
final Double v = e.getValue();
// Look at the values of the current series
Map.Entry he = currentValues.higherEntry(k);
Map.Entry le = currentValues.lowerEntry(k);
if (he != null && le != null) {
// Interpolate the for the point from current series and add the accumulated value
accum.put(k, ((k - le.getKey()) / (he.getKey() - le.getKey())) *
(le.getValue() + he.getValue()) + v);
} else if (he != null) {
// There accumulated value is before the first value in the current series
accum.put(k, he.getValue() + v);
} else if (le != null) {
// There accumulated value is after the last value in the current series
accum.put(k, le.getValue() + v);
} else {
// The current series are empty
accum.put(k, v);
}
}
prevAccum.clear();
prevAccum.putAll(accum);
accum.clear();
first = (totalMinY == Double.MAX_VALUE); // If there was already some value in the series, we can consider as
// being past the first series
}
if(totalMinY != Double.MAX_VALUE) ya.invalidateRange(Arrays.asList(ya.toRealValue(totalMinY),
ya.toRealValue(Collections.max(prevAccum.values()))));
}
}
/** {@inheritDoc} */
@Override protected void layoutPlotChildren() {
ArrayList> currentSeriesData = new ArrayList<>();
// AggregateData hold the data points of both the current and the previous series.
// The goal is to collect all the data, sort it and iterate.
ArrayList> aggregateData = new ArrayList<>();
for (int seriesIndex=0; seriesIndex < getDataSize(); seriesIndex++) { // for every series
Series series = getData().get(seriesIndex);
aggregateData.clear();
// copy currentSeriesData accumulated in the previous iteration to aggregate.
for(DataPointInfo data : currentSeriesData) {
data.partOf = PartOf.PREVIOUS;
aggregateData.add(data);
}
currentSeriesData.clear();
// now copy actual data of the current series.
for (Iterator> it = getDisplayedDataIterator(series); it.hasNext(); ) {
Data item = it.next();
DataPointInfo itemInfo = new DataPointInfo<>(item, item.getXValue(),
item.getYValue(), PartOf.CURRENT);
aggregateData.add(itemInfo);
}
DoubleProperty seriesYAnimMultiplier = seriesYMultiplierMap.get(series);
Path seriesLine = (Path)((Group)series.getNode()).getChildren().get(1);
Path fillPath = (Path)((Group)series.getNode()).getChildren().get(0);
seriesLine.getElements().clear();
fillPath.getElements().clear();
int dataIndex = 0;
// Sort data points from prev and current series
sortAggregateList(aggregateData);
Axis yAxis = getYAxis();
Axis xAxis = getXAxis();
boolean firstCurrent = false;
boolean lastCurrent = false;
int firstCurrentIndex = findNextCurrent(aggregateData, -1);
int lastCurrentIndex = findPreviousCurrent(aggregateData, aggregateData.size());
double basePosition = yAxis.getZeroPosition();
if (Double.isNaN(basePosition)) {
ValueAxis valueYAxis = (ValueAxis) yAxis;
if (valueYAxis.getLowerBound() > 0) {
basePosition = valueYAxis.getDisplayPosition(valueYAxis.getLowerBound());
} else {
basePosition = valueYAxis.getDisplayPosition(valueYAxis.getUpperBound());
}
}
// Iterate over the aggregate data : this process accumulates data points
// cumulatively from the bottom to top of stack
for (DataPointInfo dataInfo : aggregateData) {
if (dataIndex == lastCurrentIndex) lastCurrent = true;
if (dataIndex == firstCurrentIndex) firstCurrent = true;
final Data item = dataInfo.dataItem;
if (dataInfo.partOf.equals(PartOf.CURRENT)) { // handle data from current series
int pIndex = findPreviousPrevious(aggregateData, dataIndex);
int nIndex = findNextPrevious(aggregateData, dataIndex);
DataPointInfo prevPoint;
DataPointInfo nextPoint;
if (pIndex == -1 || (nIndex == -1 && !(aggregateData.get(pIndex).x.equals(dataInfo.x)))) {
if (firstCurrent) {
// Need to add the drop down point.
Data ddItem = new Data(dataInfo.x, 0);
addDropDown(currentSeriesData, ddItem, ddItem.getXValue(), ddItem.getYValue(),
xAxis.getDisplayPosition(ddItem.getCurrentX()), basePosition);
}
double x = xAxis.getDisplayPosition(item.getCurrentX());
double y = yAxis.getDisplayPosition(
yAxis.toRealValue(yAxis.toNumericValue(item.getCurrentY()) * seriesYAnimMultiplier.getValue()));
addPoint(currentSeriesData, item, item.getXValue(), item.getYValue(), x, y,
PartOf.CURRENT, false, (firstCurrent) ? false : true);
if (dataIndex == lastCurrentIndex) {
// need to add drop down point
Data ddItem = new Data(dataInfo.x, 0);
addDropDown(currentSeriesData, ddItem, ddItem.getXValue(), ddItem.getYValue(),
xAxis.getDisplayPosition(ddItem.getCurrentX()), basePosition);
}
} else {
prevPoint = aggregateData.get(pIndex);
if (prevPoint.x.equals(dataInfo.x)) { // Need to add Y values
// Check if prevPoint is a dropdown - as the stable sort preserves the order.
// If so, find the non dropdown previous point on previous series.
if (prevPoint.dropDown) {
pIndex = findPreviousPrevious(aggregateData, pIndex);
prevPoint = aggregateData.get(pIndex);
// If lastCurrent - add this drop down
}
if (prevPoint.x.equals(dataInfo.x)) { // simply add
double x = xAxis.getDisplayPosition(item.getCurrentX());
final double yv = yAxis.toNumericValue(item.getCurrentY()) + yAxis.toNumericValue(prevPoint.y);
double y = yAxis.getDisplayPosition(
yAxis.toRealValue(yv * seriesYAnimMultiplier.getValue()));
addPoint(currentSeriesData, item, dataInfo.x, yAxis.toRealValue(yv), x, y, PartOf.CURRENT, false,
(firstCurrent) ? false : true);
}
if (lastCurrent) {
addDropDown(currentSeriesData, item, prevPoint.x, prevPoint.y, prevPoint.displayX, prevPoint.displayY);
}
} else {
// interpolate
nextPoint = (nIndex == -1) ? null : aggregateData.get(nIndex);
prevPoint = (pIndex == -1) ? null : aggregateData.get(pIndex);
final double yValue = yAxis.toNumericValue(item.getCurrentY());
if (prevPoint != null && nextPoint != null) {
double x = xAxis.getDisplayPosition(item.getCurrentX());
double displayY = interpolate(prevPoint.displayX,
prevPoint.displayY, nextPoint.displayX, nextPoint.displayY, x);
double dataY = interpolate(xAxis.toNumericValue(prevPoint.x),
yAxis.toNumericValue(prevPoint.y),
xAxis.toNumericValue(nextPoint.x),
yAxis.toNumericValue(nextPoint.y),
xAxis.toNumericValue(dataInfo.x));
if (firstCurrent) {
// now create the drop down point
Data ddItem = new Data(dataInfo.x, dataY);
addDropDown(currentSeriesData, ddItem, dataInfo.x, yAxis.toRealValue(dataY), x, displayY);
}
double y = yAxis.getDisplayPosition(yAxis.toRealValue((yValue + dataY) * seriesYAnimMultiplier.getValue()));
// Add the current point
addPoint(currentSeriesData, item, dataInfo.x, yAxis.toRealValue(yValue + dataY), x, y, PartOf.CURRENT, false,
(firstCurrent) ? false : true);
if (dataIndex == lastCurrentIndex) {
// add drop down point
Data ddItem = new Data(dataInfo.x, dataY);
addDropDown(currentSeriesData, ddItem, dataInfo.x, yAxis.toRealValue(dataY), x, displayY);
}
// Note: add drop down if last current
}
else {
// we do not need to take care of this as it is
// already handled above with check of if(pIndex == -1 or nIndex == -1)
}
}
}
} else { // handle data from Previous series.
int pIndex = findPreviousCurrent(aggregateData, dataIndex);
int nIndex = findNextCurrent(aggregateData, dataIndex);
DataPointInfo prevPoint;
DataPointInfo nextPoint;
if (dataInfo.dropDown) {
if (xAxis.toNumericValue(dataInfo.x) <=
xAxis.toNumericValue(aggregateData.get(firstCurrentIndex).x) ||
xAxis.toNumericValue(dataInfo.x) > xAxis.toNumericValue(aggregateData.get(lastCurrentIndex).x)) {
addDropDown(currentSeriesData, item, dataInfo.x, dataInfo.y, dataInfo.displayX, dataInfo.displayY);
}
} else {
if (pIndex == -1 || nIndex == -1) {
addPoint(currentSeriesData, item, dataInfo.x, dataInfo.y, dataInfo.displayX, dataInfo.displayY,
PartOf.CURRENT, true, false);
} else {
nextPoint = aggregateData.get(nIndex);
if (nextPoint.x.equals(dataInfo.x)) {
// do nothing as the current point is already there.
} else {
// interpolate on the current series.
prevPoint = aggregateData.get(pIndex);
double x = xAxis.getDisplayPosition(item.getCurrentX());
double dataY = interpolate(xAxis.toNumericValue(prevPoint.x),
yAxis.toNumericValue(prevPoint.y),
xAxis.toNumericValue(nextPoint.x),
yAxis.toNumericValue(nextPoint.y),
xAxis.toNumericValue(dataInfo.x));
final double yv = yAxis.toNumericValue(dataInfo.y) + dataY;
double y = yAxis.getDisplayPosition(
yAxis.toRealValue(yv * seriesYAnimMultiplier.getValue()));
addPoint(currentSeriesData, new Data(dataInfo.x, dataY), dataInfo.x, yAxis.toRealValue(yv), x, y, PartOf.CURRENT, true, true);
}
}
}
}
dataIndex++;
if (firstCurrent) firstCurrent = false;
if (lastCurrent) lastCurrent = false;
} // end of inner for loop
// Draw the SeriesLine and Series fill
if (!currentSeriesData.isEmpty()) {
seriesLine.getElements().add(new MoveTo(currentSeriesData.get(0).displayX, currentSeriesData.get(0).displayY));
fillPath.getElements().add(new MoveTo(currentSeriesData.get(0).displayX, currentSeriesData.get(0).displayY));
}
for (DataPointInfo point : currentSeriesData) {
if (point.lineTo) {
seriesLine.getElements().add(new LineTo(point.displayX, point.displayY));
} else {
seriesLine.getElements().add(new MoveTo(point.displayX, point.displayY));
}
fillPath.getElements().add(new LineTo(point.displayX, point.displayY));
// draw symbols only for actual data points and skip for interpolated points.
if (!point.skipSymbol) {
Node symbol = point.dataItem.getNode();
if (symbol != null) {
final double w = symbol.prefWidth(-1);
final double h = symbol.prefHeight(-1);
symbol.resizeRelocate(point.displayX-(w/2), point.displayY-(h/2),w,h);
}
}
}
for(int i = aggregateData.size()-1; i > 0; i--) {
DataPointInfo point = aggregateData.get(i);
if (PartOf.PREVIOUS.equals(point.partOf)) {
fillPath.getElements().add(new LineTo(point.displayX, point.displayY));
}
}
if (!fillPath.getElements().isEmpty()) {
fillPath.getElements().add(new ClosePath());
}
} // end of out for loop
}
private void addDropDown(ArrayList> currentSeriesData, Data item, X xValue, Y yValue, double x, double y) {
DataPointInfo dropDownDataPoint = new DataPointInfo<>(true);
dropDownDataPoint.setValues(item, xValue, yValue, x, y, PartOf.CURRENT, true, false);
currentSeriesData.add(dropDownDataPoint);
}
private void addPoint(ArrayList> currentSeriesData, Data item, X xValue, Y yValue, double x, double y, PartOf partof,
boolean symbol, boolean lineTo) {
DataPointInfo currentDataPoint = new DataPointInfo<>();
currentDataPoint.setValues(item, xValue, yValue, x, y, partof, symbol, lineTo);
currentSeriesData.add(currentDataPoint);
}
/** {@inheritDoc} */
@Override void seriesBeingRemovedIsAdded(Series series) {
if (timeline != null) {
timeline.setOnFinished(null);
timeline.stop();
timeline = null;
getPlotChildren().remove(series.getNode());
for (Data d:series.getData()) getPlotChildren().remove(d.getNode());
removeSeriesFromDisplay(series);
}
}
//-------------------- helper methods to retrieve data points from the previous
// or current data series.
private int findNextCurrent(ArrayList> points, int index) {
for(int i = index+1; i < points.size(); i++) {
if (points.get(i).partOf.equals(PartOf.CURRENT)) {
return i;
}
}
return -1;
}
private int findPreviousCurrent(ArrayList> points, int index) {
for(int i = index-1; i >= 0; i--) {
if (points.get(i).partOf.equals(PartOf.CURRENT)) {
return i;
}
}
return -1;
}
private int findPreviousPrevious(ArrayList> points, int index) {
for(int i = index-1; i >= 0; i--) {
if (points.get(i).partOf.equals(PartOf.PREVIOUS)) {
return i;
}
}
return -1;
}
private int findNextPrevious(ArrayList> points, int index) {
for(int i = index+1; i < points.size(); i++) {
if (points.get(i).partOf.equals(PartOf.PREVIOUS)) {
return i;
}
}
return -1;
}
private void sortAggregateList(ArrayList> aggregateList) {
Collections.sort(aggregateList, (o1, o2) -> {
Data d1 = o1.dataItem;
Data d2 = o2.dataItem;
double val1 = getXAxis().toNumericValue(d1.getXValue());
double val2 = getXAxis().toNumericValue(d2.getXValue());
return (val1 < val2 ? -1 : ( val1 == val2) ? 0 : 1);
});
}
private double interpolate(double lowX, double lowY, double highX, double highY, double x) {
// using y = mx+c find the y for the given x.
return (((highY - lowY)/(highX - lowX))*(x - lowX))+lowY;
}
private Node createSymbol(Series series, int seriesIndex, final Data item, int itemIndex) {
Node symbol = item.getNode();
// check if symbol has already been created
if (symbol == null && getCreateSymbols()) {
symbol = new StackPane();
symbol.setAccessibleRole(AccessibleRole.TEXT);
symbol.setAccessibleRoleDescription("Point");
symbol.focusTraversableProperty().bind(Platform.accessibilityActiveProperty());
item.setNode(symbol);
}
// set symbol styles
// Note not sure if we want to add or check, ie be more careful and efficient here
if (symbol != null) symbol.getStyleClass().setAll("chart-area-symbol", "series" + seriesIndex, "data" + itemIndex,
series.defaultColorStyleClass);
return symbol;
}
@Override
LegendItem createLegendItemForSeries(Series series, int seriesIndex) {
LegendItem legendItem = new LegendItem(series.getName());
legendItem.getSymbol().getStyleClass().addAll("chart-area-symbol", "series" + seriesIndex,
"area-legend-symbol", series.defaultColorStyleClass);
return legendItem;
}
// -------------- INNER CLASSES --------------------------------------------
/*
* Helper class to hold data and display and other information for each
* data point
*/
final static class DataPointInfo {
X x;
Y y;
double displayX;
double displayY;
Data dataItem;
PartOf partOf;
boolean skipSymbol = false; // interpolated point - skip drawing symbol
boolean lineTo = false; // should there be a lineTo to this point on SeriesLine.
boolean dropDown = false; // Is this a drop down point ( non data point).
//----- Constructors --------------------
DataPointInfo() {}
DataPointInfo(Data item, X x, Y y, PartOf partOf) {
this.dataItem = item;
this.x = x;
this.y = y;
this.partOf = partOf;
}
DataPointInfo(boolean dropDown) {
this.dropDown = dropDown;
}
void setValues(Data item, X x, Y y, double dx, double dy,
PartOf partOf, boolean skipSymbol, boolean lineTo) {
this.dataItem = item;
this.x = x;
this.y = y;
this.displayX = dx;
this.displayY = dy;
this.partOf = partOf;
this.skipSymbol = skipSymbol;
this.lineTo = lineTo;
}
public final X getX() {
return x;
}
public final Y getY() {
return y;
}
}
// To indicate if the data point belongs to the current or the previous series.
private static enum PartOf {
CURRENT,
PREVIOUS
}
// -------------- STYLESHEET HANDLING --------------------------------------
private static class StyleableProperties {
private static final CssMetaData, Boolean> CREATE_SYMBOLS =
new CssMetaData<>("-fx-create-symbols",
BooleanConverter.getInstance(), Boolean.TRUE) {
@Override
public boolean isSettable(StackedAreaChart node) {
return node.createSymbols == null || !node.createSymbols.isBound();
}
@Override
public StyleableProperty getStyleableProperty(StackedAreaChart node) {
return (StyleableProperty)node.createSymbolsProperty();
}
};
private static final List> STYLEABLES;
static {
final List> styleables =
new ArrayList<>(XYChart.getClassCssMetaData());
styleables.add(CREATE_SYMBOLS);
STYLEABLES = Collections.unmodifiableList(styleables);
}
}
/**
* Gets the {@code CssMetaData} associated with this class, which may include the
* {@code CssMetaData} of its superclasses.
* @return the {@code CssMetaData}
* @since JavaFX 8.0
*/
public static List> getClassCssMetaData() {
return StyleableProperties.STYLEABLES;
}
/**
* {@inheritDoc}
* @since JavaFX 8.0
*/
@Override
public List> getCssMetaData() {
return getClassCssMetaData();
}
}