📄 xydifferencerenderer.java
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entities = info.getOwner().getEntityCollection();
}
Paint seriesPaint = getItemPaint(series, item);
Stroke seriesStroke = getItemStroke(series, item);
g2.setPaint(seriesPaint);
g2.setStroke(seriesStroke);
if (series == 0) {
Number x0n = dataset.getX(0, item);
Number y0n = dataset.getY(0, item);
Number x1n = dataset.getX(1, item);
Number y1n = dataset.getY(1, item);
PlotOrientation orientation = plot.getOrientation();
RectangleEdge domainAxisLocation = plot.getDomainAxisEdge();
RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
double x0 = x0n.doubleValue();
double y0 = y0n.doubleValue();
double transX0 = domainAxis.valueToJava2D(x0, dataArea, domainAxisLocation);
double transY0 = rangeAxis.valueToJava2D(y0, dataArea, rangeAxisLocation);
double x1 = x1n.doubleValue();
double y1 = y1n.doubleValue();
double transX1 = domainAxis.valueToJava2D(x1, dataArea, domainAxisLocation);
double transY1 = rangeAxis.valueToJava2D(y1, dataArea, rangeAxisLocation);
if (item > 0) {
// get the previous data points...
Number prevx0n = dataset.getX(0, item - 1);
Number prevy0n = dataset.getY(0, item - 1);
Number prevx1n = dataset.getX(1, item - 1);
Number prevy1n = dataset.getY(1, item - 1);
double prevx0 = prevx0n.doubleValue();
double prevy0 = prevy0n.doubleValue();
double prevtransX0 = domainAxis.valueToJava2D(prevx0, dataArea, domainAxisLocation);
double prevtransY0 = rangeAxis.valueToJava2D(prevy0, dataArea, rangeAxisLocation);
double prevx1 = prevx1n.doubleValue();
double prevy1 = prevy1n.doubleValue();
double prevtransX1 = domainAxis.valueToJava2D(prevx1, dataArea, domainAxisLocation);
double prevtransY1 = rangeAxis.valueToJava2D(prevy1, dataArea, rangeAxisLocation);
Line2D line0 = null;
Line2D line1 = null;
if (orientation == PlotOrientation.HORIZONTAL) {
line0 = new Line2D.Double(transY0, transX0, prevtransY0, prevtransX0);
line1 = new Line2D.Double(transY1, transX1, prevtransY1, prevtransX1);
}
else if (orientation == PlotOrientation.VERTICAL) {
line0 = new Line2D.Double(transX0, transY0, prevtransX0, prevtransY0);
line1 = new Line2D.Double(transX1, transY1, prevtransX1, prevtransY1);
}
if (line0 != null && line0.intersects(dataArea)) {
g2.setPaint(getItemPaint(series, item));
g2.draw(line0);
}
if (line1 != null && line1.intersects(dataArea)) {
g2.setPaint(getItemPaint(1, item));
g2.draw(line1);
}
}
if (getPlotShapes()) {
Shape shape0 = getItemShape(series, item);
if (orientation == PlotOrientation.HORIZONTAL) {
shape0 = createTransformedShape(shape0, transY0, transX0);
}
else { // vertical
shape0 = createTransformedShape(shape0, transX0, transY0);
}
if (shape0.intersects(dataArea)) {
g2.setPaint(getItemPaint(series, item));
g2.fill(shape0);
}
entityArea = shape0;
// add an entity for the item...
if (entities != null) {
if (entityArea == null) {
entityArea = new Rectangle2D.Double(transX0 - 2, transY0 - 2, 4, 4);
}
String tip = null;
XYToolTipGenerator generator = getToolTipGenerator(series, item);
if (generator != null) {
tip = generator.generateToolTip(dataset, series, item);
}
String url = null;
if (getURLGenerator() != null) {
url = getURLGenerator().generateURL(dataset, series, item);
}
XYItemEntity entity = new XYItemEntity(entityArea, dataset, series, item,
tip, url);
entities.addEntity(entity);
}
Shape shape1 = getItemShape(series + 1, item);
shape1 = createTransformedShape(shape1, transX1, transY1);
if (shape1.intersects(dataArea)) {
g2.setPaint(getItemPaint(series + 1, item));
g2.fill(shape1);
}
entityArea = shape1;
// add an entity for the item...
if (entities != null) {
if (entityArea == null) {
entityArea = new Rectangle2D.Double(transX1 - 2, transY1 - 2, 4, 4);
}
String tip = null;
XYToolTipGenerator generator = getToolTipGenerator(series, item);
if (generator != null) {
tip = generator.generateToolTip(dataset, series + 1, item);
}
String url = null;
if (getURLGenerator() != null) {
url = getURLGenerator().generateURL(dataset, series + 1, item);
}
XYItemEntity entity = new XYItemEntity(entityArea, dataset, series + 1, item,
tip, url);
entities.addEntity(entity);
}
}
updateCrosshairValues(crosshairState, x1, y1, transX1, transY1, orientation);
}
}
/**
* Returns the positive area for a crossover point.
*
* @param x0 x coordinate.
* @param y0A y coordinate A.
* @param y0B y coordinate B.
* @param x1 x coordinate.
* @param y1A y coordinate A.
* @param y1B y coordinate B.
* @param orientation the plot orientation.
*
* @return The positive area.
*/
protected Shape getPositiveArea(float x0, float y0A, float y0B,
float x1, float y1A, float y1B,
PlotOrientation orientation) {
Shape result = null;
boolean startsNegative = (y0A >= y0B);
boolean endsNegative = (y1A >= y1B);
if (orientation == PlotOrientation.HORIZONTAL) {
startsNegative = (y0B >= y0A);
endsNegative = (y1B >= y1A);
}
if (startsNegative) { // starts negative
if (endsNegative) {
// all negative - return null
}
else {
// changed from negative to positive
float[] p = getIntersection(x0, y0A, x1, y1A, x0, y0B, x1, y1B);
GeneralPath area = new GeneralPath();
if (orientation == PlotOrientation.HORIZONTAL) {
area.moveTo(y1A, x1);
area.lineTo(p[1], p[0]);
area.lineTo(y1B, x1);
area.closePath();
}
else if (orientation == PlotOrientation.VERTICAL) {
area.moveTo(x1, y1A);
area.lineTo(p[0], p[1]);
area.lineTo(x1, y1B);
area.closePath();
}
result = area;
}
}
else { // starts positive
if (endsNegative) {
// changed from positive to negative
float[] p = getIntersection(x0, y0A, x1, y1A, x0, y0B, x1, y1B);
GeneralPath area = new GeneralPath();
if (orientation == PlotOrientation.HORIZONTAL) {
area.moveTo(y0A, x0);
area.lineTo(p[1], p[0]);
area.lineTo(y0B, x0);
area.closePath();
}
else if (orientation == PlotOrientation.VERTICAL) {
area.moveTo(x0, y0A);
area.lineTo(p[0], p[1]);
area.lineTo(x0, y0B);
area.closePath();
}
result = area;
}
else {
GeneralPath area = new GeneralPath();
if (orientation == PlotOrientation.HORIZONTAL) {
area.moveTo(y0A, x0);
area.lineTo(y1A, x1);
area.lineTo(y1B, x1);
area.lineTo(y0B, x0);
area.closePath();
}
else if (orientation == PlotOrientation.VERTICAL) {
area.moveTo(x0, y0A);
area.lineTo(x1, y1A);
area.lineTo(x1, y1B);
area.lineTo(x0, y0B);
area.closePath();
}
result = area;
}
}
return result;
}
/**
* Returns the negative area for a cross-over section.
*
* @param x0 x coordinate.
* @param y0A y coordinate A.
* @param y0B y coordinate B.
* @param x1 x coordinate.
* @param y1A y coordinate A.
* @param y1B y coordinate B.
* @param orientation the plot orientation.
*
* @return The negative area.
*/
protected Shape getNegativeArea(float x0, float y0A, float y0B,
float x1, float y1A, float y1B,
PlotOrientation orientation) {
Shape result = null;
boolean startsNegative = (y0A >= y0B);
boolean endsNegative = (y1A >= y1B);
if (orientation == PlotOrientation.HORIZONTAL) {
startsNegative = (y0B >= y0A);
endsNegative = (y1B >= y1A);
}
if (startsNegative) { // starts negative
if (endsNegative) { // all negative
GeneralPath area = new GeneralPath();
if (orientation == PlotOrientation.HORIZONTAL) {
area.moveTo(y0A, x0);
area.lineTo(y1A, x1);
area.lineTo(y1B, x1);
area.lineTo(y0B, x0);
area.closePath();
}
else if (orientation == PlotOrientation.VERTICAL) {
area.moveTo(x0, y0A);
area.lineTo(x1, y1A);
area.lineTo(x1, y1B);
area.lineTo(x0, y0B);
area.closePath();
}
result = area;
}
else { // changed from negative to positive
float[] p = getIntersection(x0, y0A, x1, y1A, x0, y0B, x1, y1B);
GeneralPath area = new GeneralPath();
if (orientation == PlotOrientation.HORIZONTAL) {
area.moveTo(y0A, x0);
area.lineTo(p[1], p[0]);
area.lineTo(y0B, x0);
area.closePath();
}
else if (orientation == PlotOrientation.VERTICAL) {
area.moveTo(x0, y0A);
area.lineTo(p[0], p[1]);
area.lineTo(x0, y0B);
area.closePath();
}
result = area;
}
}
else {
if (endsNegative) {
// changed from positive to negative
float[] p = getIntersection(x0, y0A, x1, y1A, x0, y0B, x1, y1B);
GeneralPath area = new GeneralPath();
if (orientation == PlotOrientation.HORIZONTAL) {
area.moveTo(y1A, x1);
area.lineTo(p[1], p[0]);
area.lineTo(y1B, x1);
area.closePath();
}
else if (orientation == PlotOrientation.VERTICAL) {
area.moveTo(x1, y1A);
area.lineTo(p[0], p[1]);
area.lineTo(x1, y1B);
area.closePath();
}
result = area;
}
else {
// all negative - return null
}
}
return result;
}
/**
* Returns the intersection point of two lines.
*
* @param x1 x1
* @param y1 y1
* @param x2 x2
* @param y2 y2
* @param x3 x3
* @param y3 y3
* @param x4 x4
* @param y4 y4
*
* @return The intersection point.
*/
private float[] getIntersection(float x1, float y1, float x2, float y2,
float x3, float y3, float x4, float y4) {
float n = (x4 - x3) * (y1 - y3) - (y4 - y3) * (x1 - x3);
float d = (y4 - y3) * (x2 - x1) - (x4 - x3) * (y2 - y1);
float u = n / d;
float[] result = new float[2];
result[0] = x1 + u * (x2 - x1);
result[1] = y1 + u * (y2 - y1);
return result;
}
/**
* Returns a clone of the renderer.
*
* @return A clone.
*
* @throws CloneNotSupportedException if the renderer cannot be cloned.
*/
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
/**
* Provides serialization support.
*
* @param stream the output stream.
*
* @throws IOException if there is an I/O error.
*/
private void writeObject(ObjectOutputStream stream) throws IOException {
stream.defaultWriteObject();
SerialUtilities.writePaint(this.positivePaint, stream);
SerialUtilities.writePaint(this.negativePaint, stream);
}
/**
* Provides serialization support.
*
* @param stream the input stream.
*
* @throws IOException if there is an I/O error.
* @throws ClassNotFoundException if there is a classpath problem.
*/
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
stream.defaultReadObject();
this.positivePaint = SerialUtilities.readPaint(stream);
this.negativePaint = SerialUtilities.readPaint(stream);
}
}
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