/**
* Draws the visual representation of a single data item.
*
* @param g2 the graphics device.
* @param state the renderer state.
* @param dataArea the area within which the data is being drawn.
* @param info collects information about the drawing.
* @param plot the plot (can be used to obtain standard color information etc).
* @param domainAxis the domain (horizontal) axis.
* @param rangeAxis the range (vertical) axis.
* @param dataset the dataset (an {@link XYZDataset} is expected).
* @param series the series index (zero-based).
* @param item the item index (zero-based).
* @param crosshairState crosshair information for the plot (<code>null</code> permitted).
* @param pass the pass index.
*/
public void drawItem(
Graphics2D g2,
XYItemRendererState state,
Rectangle2D dataArea,
PlotRenderingInfo info,
XYPlot plot,
ValueAxis domainAxis,
ValueAxis rangeAxis,
XYDataset dataset,
int series,
int item,
CrosshairState crosshairState,
int pass) {
// return straight away if the item is not visible
if (!getItemVisible(series, item)) {
return;
}
PlotOrientation orientation = plot.getOrientation();
// get the data point...
double x = dataset.getXValue(series, item);
double y = dataset.getYValue(series, item);
double z = Double.NaN;
if (dataset instanceof XYZDataset) {
XYZDataset xyzData = (XYZDataset) dataset;
z = xyzData.getZValue(series, item);
}
if (!Double.isNaN(z)) {
RectangleEdge domainAxisLocation = plot.getDomainAxisEdge();
RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
double transX = domainAxis.valueToJava2D(x, dataArea, domainAxisLocation);
double transY = rangeAxis.valueToJava2D(y, dataArea, rangeAxisLocation);
double transDomain = 0.0;
double transRange = 0.0;
double zero;
switch (getScaleType()) {
case SCALE_ON_DOMAIN_AXIS:
zero = domainAxis.valueToJava2D(0.0, dataArea, domainAxisLocation);
transDomain = domainAxis.valueToJava2D(z, dataArea, domainAxisLocation) - zero;
transRange = transDomain;
break;
case SCALE_ON_RANGE_AXIS:
zero = rangeAxis.valueToJava2D(0.0, dataArea, rangeAxisLocation);
transRange = zero - rangeAxis.valueToJava2D(z, dataArea, rangeAxisLocation);
transDomain = transRange;
break;
default:
double zero1 = domainAxis.valueToJava2D(0.0, dataArea, domainAxisLocation);
double zero2 = rangeAxis.valueToJava2D(0.0, dataArea, rangeAxisLocation);
transDomain = domainAxis.valueToJava2D(z, dataArea, domainAxisLocation) - zero1;
transRange = zero2 - rangeAxis.valueToJava2D(z, dataArea, rangeAxisLocation);
}
transDomain = Math.abs(transDomain);
transRange = Math.abs(transRange);
Ellipse2D circle = null;
if (orientation == PlotOrientation.VERTICAL) {
circle =
new Ellipse2D.Double(
transX - transDomain / 2.0, transY - transRange / 2.0, transDomain, transRange);
} else if (orientation == PlotOrientation.HORIZONTAL) {
circle =
new Ellipse2D.Double(
transY - transRange / 2.0, transX - transDomain / 2.0, transRange, transDomain);
}
g2.setPaint(getItemPaint(series, item));
g2.fill(circle);
g2.setStroke(getItemOutlineStroke(series, item));
g2.setPaint(getItemOutlinePaint(series, item));
g2.draw(circle);
if (isItemLabelVisible(series, item)) {
if (orientation == PlotOrientation.VERTICAL) {
drawItemLabel(g2, orientation, dataset, series, item, transX, transY, false);
} else if (orientation == PlotOrientation.HORIZONTAL) {
drawItemLabel(g2, orientation, dataset, series, item, transY, transX, false);
}
}
// add an entity if this info is being collected
EntityCollection entities = null;
if (info != null) {
entities = info.getOwner().getEntityCollection();
if (entities != null && circle.intersects(dataArea)) {
addEntity(
entities, circle, dataset, series, item, circle.getCenterX(), circle.getCenterY());
}
}
int domainAxisIndex = plot.getDomainAxisIndex(domainAxis);
int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis);
updateCrosshairValues(
crosshairState, x, y, domainAxisIndex, rangeAxisIndex, transX, transY, orientation);
}
}
