 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) {
if ((!getPlotLines()) || ((!(domainAxis instanceof CyclicNumberAxis))
&& (!(rangeAxis instanceof CyclicNumberAxis))) || (item < = 0)) {
super.drawItem(g2, state, dataArea, info, plot, domainAxis,
rangeAxis, dataset, series, item, crosshairState, pass);
return;
}
// get the previous data point...
double xn = dataset.getXValue(series, item - 1);
double yn = dataset.getYValue(series, item - 1);
// If null, don't draw line = > then delegate to parent
if (Double.isNaN(yn)) {
super.drawItem(g2, state, dataArea, info, plot, domainAxis,
rangeAxis, dataset, series, item, crosshairState, pass);
return;
}
double[] x = new double[2];
double[] y = new double[2];
x[0] = xn;
y[0] = yn;
// get the data point...
xn = dataset.getXValue(series, item);
yn = dataset.getYValue(series, item);
// If null, don't draw line at all
if (Double.isNaN(yn)) {
return;
}
x[1] = xn;
y[1] = yn;
// Now split the segment as needed
double xcycleBound = Double.NaN;
double ycycleBound = Double.NaN;
boolean xBoundMapping = false, yBoundMapping = false;
CyclicNumberAxis cnax = null, cnay = null;
if (domainAxis instanceof CyclicNumberAxis) {
cnax = (CyclicNumberAxis) domainAxis;
xcycleBound = cnax.getCycleBound();
xBoundMapping = cnax.isBoundMappedToLastCycle();
// If the segment must be splitted, insert a new point
// Strict test forces to have real segments (not 2 equal points)
// and avoids division by 0
if ((x[0] != x[1])
&& ((xcycleBound >= x[0])
&& (xcycleBound < = x[1])
|| (xcycleBound >= x[1])
&& (xcycleBound < = x[0]))) {
double[] nx = new double[3];
double[] ny = new double[3];
nx[0] = x[0]; nx[2] = x[1]; ny[0] = y[0]; ny[2] = y[1];
nx[1] = xcycleBound;
ny[1] = (y[1] - y[0]) * (xcycleBound - x[0])
/ (x[1] - x[0]) + y[0];
x = nx; y = ny;
}
}
if (rangeAxis instanceof CyclicNumberAxis) {
cnay = (CyclicNumberAxis) rangeAxis;
ycycleBound = cnay.getCycleBound();
yBoundMapping = cnay.isBoundMappedToLastCycle();
// The split may occur in either x splitted segments, if any, but
// not in both
if ((y[0] != y[1]) && ((ycycleBound >= y[0])
&& (ycycleBound < = y[1])
|| (ycycleBound >= y[1]) && (ycycleBound < = y[0]))) {
double[] nx = new double[x.length + 1];
double[] ny = new double[y.length + 1];
nx[0] = x[0]; nx[2] = x[1]; ny[0] = y[0]; ny[2] = y[1];
ny[1] = ycycleBound;
nx[1] = (x[1] - x[0]) * (ycycleBound - y[0])
/ (y[1] - y[0]) + x[0];
if (x.length == 3) {
nx[3] = x[2]; ny[3] = y[2];
}
x = nx; y = ny;
}
else if ((x.length == 3) && (y[1] != y[2]) && ((ycycleBound >= y[1])
&& (ycycleBound < = y[2])
|| (ycycleBound >= y[2]) && (ycycleBound < = y[1]))) {
double[] nx = new double[4];
double[] ny = new double[4];
nx[0] = x[0]; nx[1] = x[1]; nx[3] = x[2];
ny[0] = y[0]; ny[1] = y[1]; ny[3] = y[2];
ny[2] = ycycleBound;
nx[2] = (x[2] - x[1]) * (ycycleBound - y[1])
/ (y[2] - y[1]) + x[1];
x = nx; y = ny;
}
}
// If the line is not wrapping, then parent is OK
if (x.length == 2) {
super.drawItem(g2, state, dataArea, info, plot, domainAxis,
rangeAxis, dataset, series, item, crosshairState, pass);
return;
}
OverwriteDataSet newset = new OverwriteDataSet(x, y, dataset);
if (cnax != null) {
if (xcycleBound == x[0]) {
cnax.setBoundMappedToLastCycle(x[1] < = xcycleBound);
}
if (xcycleBound == x[1]) {
cnax.setBoundMappedToLastCycle(x[0] < = xcycleBound);
}
}
if (cnay != null) {
if (ycycleBound == y[0]) {
cnay.setBoundMappedToLastCycle(y[1] < = ycycleBound);
}
if (ycycleBound == y[1]) {
cnay.setBoundMappedToLastCycle(y[0] < = ycycleBound);
}
}
super.drawItem(
g2, state, dataArea, info, plot, domainAxis, rangeAxis,
newset, series, 1, crosshairState, pass
);
if (cnax != null) {
if (xcycleBound == x[1]) {
cnax.setBoundMappedToLastCycle(x[2] < = xcycleBound);
}
if (xcycleBound == x[2]) {
cnax.setBoundMappedToLastCycle(x[1] < = xcycleBound);
}
}
if (cnay != null) {
if (ycycleBound == y[1]) {
cnay.setBoundMappedToLastCycle(y[2] < = ycycleBound);
}
if (ycycleBound == y[2]) {
cnay.setBoundMappedToLastCycle(y[1] < = ycycleBound);
}
}
super.drawItem(g2, state, dataArea, info, plot, domainAxis, rangeAxis,
newset, series, 2, crosshairState, pass);
if (x.length == 4) {
if (cnax != null) {
if (xcycleBound == x[2]) {
cnax.setBoundMappedToLastCycle(x[3] < = xcycleBound);
}
if (xcycleBound == x[3]) {
cnax.setBoundMappedToLastCycle(x[2] < = xcycleBound);
}
}
if (cnay != null) {
if (ycycleBound == y[2]) {
cnay.setBoundMappedToLastCycle(y[3] < = ycycleBound);
}
if (ycycleBound == y[3]) {
cnay.setBoundMappedToLastCycle(y[2] < = ycycleBound);
}
}
super.drawItem(g2, state, dataArea, info, plot, domainAxis,
rangeAxis, newset, series, 3, crosshairState, pass);
}
if (cnax != null) {
cnax.setBoundMappedToLastCycle(xBoundMapping);
}
if (cnay != null) {
cnay.setBoundMappedToLastCycle(yBoundMapping);
}
}
Draws the visual representation of a single data item.
When using cyclic axis, do not draw a line from right to left when
cycling as would a standard XY item renderer, but instead draw a line
from the previous point to the cycle bound in the last cycle, and a line
from the cycle bound to current point in the current cycle. |
org.jfree.chart.renderer.AbstractRenderer
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