/**
* Returns the value from the specified dataset.
*
* @param datasetIndex the dataset index.
* @return The data value.
*/
public double getValue(int datasetIndex) {
double result = Double.NaN;
ValueDataset dataset = getDataset(datasetIndex);
if (dataset != null) {
Number n = dataset.getValue();
if (n != null) {
result = n.doubleValue();
}
}
return result;
}
/**
* Sets a dataset for the plot.
*
* @param index the dataset index.
* @param dataset the dataset (<code>null</code> permitted).
*/
public void setDataset(int index, ValueDataset dataset) {
ValueDataset existing = (ValueDataset) this.datasets.get(index);
if (existing != null) {
existing.removeChangeListener(this);
}
this.datasets.set(index, dataset);
if (dataset != null) {
dataset.addChangeListener(this);
}
// send a dataset change event to self...
DatasetChangeEvent event = new DatasetChangeEvent(this, dataset);
datasetChanged(event);
}
/**
* Sets the dataset for the plot, replacing the existing dataset if there is one, and triggers a
* {@link PlotChangeEvent}.
*
* @param dataset the dataset (<code>null</code> permitted).
* @see #getDataset()
*/
public void setDataset(ValueDataset dataset) {
// if there is an existing dataset, remove the plot from the list of
// change listeners...
ValueDataset existing = this.dataset;
if (existing != null) {
existing.removeChangeListener(this);
}
// set the new dataset, and register the chart as a change listener...
this.dataset = dataset;
if (dataset != null) {
setDatasetGroup(dataset.getGroup());
dataset.addChangeListener(this);
}
// send a dataset change event to self...
DatasetChangeEvent event = new DatasetChangeEvent(this, dataset);
datasetChanged(event);
}
/**
* 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) {
if (info != null) {
info.setPlotArea(area);
}
// adjust for insets...
RectangleInsets insets = getInsets();
insets.trim(area);
area.setRect(area.getX() + 4, area.getY() + 4, area.getWidth() - 8, area.getHeight() - 8);
// draw the background
if (this.drawBorder) {
drawBackground(g2, area);
}
// adjust the plot area by the interior spacing value
double gapHorizontal = (2 * DEFAULT_BORDER_SIZE);
double gapVertical = (2 * DEFAULT_BORDER_SIZE);
double meterX = area.getX() + gapHorizontal / 2;
double meterY = area.getY() + gapVertical / 2;
double meterW = area.getWidth() - gapHorizontal;
double meterH =
area.getHeight()
- gapVertical
+ ((this.meterAngle <= 180) && (this.shape != DialShape.CIRCLE)
? area.getHeight() / 1.25
: 0);
double min = Math.min(meterW, meterH) / 2;
meterX = (meterX + meterX + meterW) / 2 - min;
meterY = (meterY + meterY + meterH) / 2 - min;
meterW = 2 * min;
meterH = 2 * min;
Rectangle2D meterArea = new Rectangle2D.Double(meterX, meterY, meterW, meterH);
Rectangle2D.Double originalArea =
new Rectangle2D.Double(
meterArea.getX() - 4,
meterArea.getY() - 4,
meterArea.getWidth() + 8,
meterArea.getHeight() + 8);
double meterMiddleX = meterArea.getCenterX();
double meterMiddleY = meterArea.getCenterY();
// plot the data (unless the dataset is null)...
ValueDataset data = getDataset();
if (data != null) {
double dataMin = this.range.getLowerBound();
double dataMax = this.range.getUpperBound();
Shape savedClip = g2.getClip();
g2.clip(originalArea);
Composite originalComposite = g2.getComposite();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getForegroundAlpha()));
if (this.dialBackgroundPaint != null) {
fillArc(g2, originalArea, dataMin, dataMax, this.dialBackgroundPaint, true);
}
drawTicks(g2, meterArea, dataMin, dataMax);
drawArcForInterval(
g2,
meterArea,
new MeterInterval("", this.range, this.dialOutlinePaint, new BasicStroke(1.0f), null));
Iterator iterator = this.intervals.iterator();
while (iterator.hasNext()) {
MeterInterval interval = (MeterInterval) iterator.next();
drawArcForInterval(g2, meterArea, interval);
}
Number n = data.getValue();
if (n != null) {
double value = n.doubleValue();
drawValueLabel(g2, meterArea);
if (this.range.contains(value)) {
g2.setPaint(this.needlePaint);
g2.setStroke(new BasicStroke(2.0f));
double radius = (meterArea.getWidth() / 2) + DEFAULT_BORDER_SIZE + 15;
double valueAngle = valueToAngle(value);
double valueP1 = meterMiddleX + (radius * Math.cos(Math.PI * (valueAngle / 180)));
double valueP2 = meterMiddleY - (radius * Math.sin(Math.PI * (valueAngle / 180)));
Polygon arrow = new Polygon();
if ((valueAngle > 135 && valueAngle < 225) || (valueAngle < 45 && valueAngle > -45)) {
double valueP3 = (meterMiddleY - DEFAULT_CIRCLE_SIZE / 4);
double valueP4 = (meterMiddleY + DEFAULT_CIRCLE_SIZE / 4);
arrow.addPoint((int) meterMiddleX, (int) valueP3);
arrow.addPoint((int) meterMiddleX, (int) valueP4);
} else {
arrow.addPoint((int) (meterMiddleX - DEFAULT_CIRCLE_SIZE / 4), (int) meterMiddleY);
arrow.addPoint((int) (meterMiddleX + DEFAULT_CIRCLE_SIZE / 4), (int) meterMiddleY);
}
arrow.addPoint((int) valueP1, (int) valueP2);
g2.fill(arrow);
Ellipse2D circle =
new Ellipse2D.Double(
meterMiddleX - DEFAULT_CIRCLE_SIZE / 2,
meterMiddleY - DEFAULT_CIRCLE_SIZE / 2,
DEFAULT_CIRCLE_SIZE,
DEFAULT_CIRCLE_SIZE);
g2.fill(circle);
}
}
g2.setClip(savedClip);
g2.setComposite(originalComposite);
}
if (this.drawBorder) {
drawOutline(g2, area);
}
}