/**
* Handle the case where a plot implements the {@link Zoomable} interface.
*
* @param zoomable the zoomable plot.
* @param e the mouse wheel event.
*/
private void handleZoomable(Zoomable zoomable, MouseWheelEvent e) {
// don't zoom unless the mouse pointer is in the plot's data area
ChartRenderingInfo info = this.chartPanel.getChartRenderingInfo();
PlotRenderingInfo pinfo = info.getPlotInfo();
Point2D p = this.chartPanel.translateScreenToJava2D(e.getPoint());
if (!pinfo.getDataArea().contains(p)) {
return;
}
Plot plot = (Plot) zoomable;
// do not notify while zooming each axis
boolean notifyState = plot.isNotify();
plot.setNotify(false);
int clicks = e.getWheelRotation();
double zf = 1.0 + this.zoomFactor;
if (clicks < 0) {
zf = 1.0 / zf;
}
if (chartPanel.isDomainZoomable()) {
zoomable.zoomDomainAxes(zf, pinfo, p, true);
}
if (chartPanel.isRangeZoomable()) {
zoomable.zoomRangeAxes(zf, pinfo, p, true);
}
plot.setNotify(notifyState); // this generates the change event too
}
/**
* Draws the plot on a Java 2D graphics device (such as the screen or a printer).
*
* @param g2 the graphics device.
* @param area the area within which the plot should be drawn.
* @param anchor the anchor point (<code>null</code> permitted).
* @param parentState the state from the parent plot, if there is one.
* @param info collects info about the drawing.
*/
public void draw(
Graphics2D g2,
Rectangle2D area,
Point2D anchor,
PlotState parentState,
PlotRenderingInfo info) {
// adjust the drawing area for the plot insets (if any)...
RectangleInsets insets = getInsets();
insets.trim(area);
drawBackground(g2, area);
drawOutline(g2, area);
// check that there is some data to display...
if (DatasetUtilities.isEmptyOrNull(getDataset())) {
drawNoDataMessage(g2, area);
return;
}
int pieCount = 0;
if (getDataExtractOrder() == TableOrder.BY_ROW) {
pieCount = getDataset().getRowCount();
} else {
pieCount = getDataset().getColumnCount();
}
// the columns variable is always >= rows
int displayCols = (int) Math.ceil(Math.sqrt(pieCount));
int displayRows = (int) Math.ceil((double) pieCount / (double) displayCols);
// swap rows and columns to match plotArea shape
if (displayCols > displayRows && area.getWidth() < area.getHeight()) {
int temp = displayCols;
displayCols = displayRows;
displayRows = temp;
}
prefetchSectionPaints();
int x = (int) area.getX();
int y = (int) area.getY();
int width = ((int) area.getWidth()) / displayCols;
int height = ((int) area.getHeight()) / displayRows;
int row = 0;
int column = 0;
int diff = (displayRows * displayCols) - pieCount;
int xoffset = 0;
Rectangle rect = new Rectangle();
for (int pieIndex = 0; pieIndex < pieCount; pieIndex++) {
rect.setBounds(x + xoffset + (width * column), y + (height * row), width, height);
String title = null;
if (getDataExtractOrder() == TableOrder.BY_ROW) {
title = getDataset().getRowKey(pieIndex).toString();
} else {
title = getDataset().getColumnKey(pieIndex).toString();
}
getPieChart().setTitle(title);
PieDataset piedataset = null;
PieDataset dd = new CategoryToPieDataset(getDataset(), getDataExtractOrder(), pieIndex);
if (getLimit() > 0.0) {
piedataset =
DatasetUtilities.createConsolidatedPieDataset(dd, getAggregatedItemsKey(), getLimit());
} else {
piedataset = dd;
}
PiePlot piePlot = (PiePlot) getPieChart().getPlot();
piePlot.setDataset(piedataset);
piePlot.setPieIndex(pieIndex);
// update the section colors to match the global colors...
for (int i = 0; i < piedataset.getItemCount(); i++) {
Comparable key = piedataset.getKey(i);
Paint p;
if (key.equals(getAggregatedItemsKey())) {
p = getAggregatedItemsPaint();
} else {
p = (Paint) this.sectionPaints.get(key);
}
piePlot.setSectionPaint(key, p);
}
ChartRenderingInfo subinfo = null;
if (info != null) {
subinfo = new ChartRenderingInfo();
}
getPieChart().draw(g2, rect, subinfo);
if (info != null) {
info.getOwner().getEntityCollection().addAll(subinfo.getEntityCollection());
info.addSubplotInfo(subinfo.getPlotInfo());
}
++column;
if (column == displayCols) {
column = 0;
++row;
if (row == displayRows - 1 && diff != 0) {
xoffset = (diff * width) / 2;
}
}
}
}