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final JFreeChart chart = ChartFactory.createGanttChart(...);
CategoryPlot plot = (CategoryPlot) chart.getPlot();
GanttRenderer gr = (GanttRenderer) plot.getRenderer();
gr.setItemLabelGenerator(new IntervalCategoryItemLabelGenerator("{0}-{1}-{2}-{3}", new SimpleDateFormat(
"HH:mm:ss")));
gr.setItemLabelsVisible(true);
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public class MyGanttRenderer extends GanttRenderer {
private transient Paint completePaint;
private transient Paint incompletePaint;
private double startPercent;
private double endPercent;
public MyGanttRenderer() {
super();
setIncludeBaseInRange(false);
this.completePaint = Color.green;
this.incompletePaint = Color.red;
this.startPercent = 0.35;
this.endPercent = 0.65;
}
protected void drawTasks(Graphics2D g2,
CategoryItemRendererState state,
Rectangle2D dataArea,
CategoryPlot plot,
CategoryAxis domainAxis,
ValueAxis rangeAxis,
GanttCategoryDataset dataset,
int row,
int column) {
int count = dataset.getSubIntervalCount(row, column);
if (count == 0) {
drawTask(g2, state, dataArea, plot, domainAxis, rangeAxis,
dataset, row, column);
}
for (int subinterval = 0; subinterval < count; subinterval++) {
RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
// value 0
Number value0 = dataset.getStartValue(row, column, subinterval);
if (value0 == null) {
return;
}
double translatedValue0 = rangeAxis.valueToJava2D(
value0.doubleValue(), dataArea, rangeAxisLocation);
// value 1
Number value1 = dataset.getEndValue(row, column, subinterval);
if (value1 == null) {
return;
}
double translatedValue1 = rangeAxis.valueToJava2D(
value1.doubleValue(), dataArea, rangeAxisLocation);
if (translatedValue1 < translatedValue0) {
double temp = translatedValue1;
translatedValue1 = translatedValue0;
translatedValue0 = temp;
}
double rectStart = calculateBarW0(plot, plot.getOrientation(),
dataArea, domainAxis, state, row, column);
double rectLength = Math.abs(translatedValue1 - translatedValue0);
double rectBreadth = state.getBarWidth();
// DRAW THE BARS...
Rectangle2D bar = null;
if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
bar = new Rectangle2D.Double(translatedValue0, rectStart,
rectLength, rectBreadth);
}
else if (plot.getOrientation() == PlotOrientation.VERTICAL) {
bar = new Rectangle2D.Double(rectStart, translatedValue0,
rectBreadth, rectLength);
}
Rectangle2D completeBar = null;
Rectangle2D incompleteBar = null;
Number percent = dataset.getPercentComplete(row, column,
subinterval);
double start = getStartPercent();
double end = getEndPercent();
if (percent != null) {
double p = percent.doubleValue();
if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
completeBar = new Rectangle2D.Double(translatedValue0,
rectStart + start * rectBreadth, rectLength * p,
rectBreadth * (end - start));
incompleteBar = new Rectangle2D.Double(translatedValue0
+ rectLength * p, rectStart + start * rectBreadth,
rectLength * (1 - p), rectBreadth * (end - start));
}
else if (plot.getOrientation() == PlotOrientation.VERTICAL) {
completeBar = new Rectangle2D.Double(rectStart + start
* rectBreadth, translatedValue0 + rectLength
* (1 - p), rectBreadth * (end - start),
rectLength * p);
incompleteBar = new Rectangle2D.Double(rectStart + start
* rectBreadth, translatedValue0, rectBreadth
* (end - start), rectLength * (1 - p));
}
}
Paint seriesPaint = getItemPaint(row, column);
g2.setPaint(seriesPaint);
g2.fill(bar);
if (completeBar != null) {
g2.setPaint(getCompletePaint());
g2.fill(completeBar);
}
if (incompleteBar != null) {
g2.setPaint(getIncompletePaint());
g2.fill(incompleteBar);
}
if (isDrawBarOutline()
&& state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
g2.setStroke(getItemStroke(row, column));
g2.setPaint(getItemOutlinePaint(row, column));
g2.draw(bar);
}
CategoryItemLabelGenerator generator = getItemLabelGenerator(row, column);
if (generator != null && isItemLabelVisible(row, column)) {
drawItemLabel(g2, dataset, row, column, plot, generator, bar, false);
}
// collect entity and tool tip information...
if (state.getInfo() != null) {
EntityCollection entities = state.getEntityCollection();
if (entities != null) {
String tip = null;
if (getToolTipGenerator(row, column) != null) {
tip = getToolTipGenerator(row, column).generateToolTip(
dataset, row, column);
}
String url = null;
if (getItemURLGenerator(row, column) != null) {
url = getItemURLGenerator(row, column).generateURL(
dataset, row, column);
}
CategoryItemEntity entity = new CategoryItemEntity(
bar, tip, url, dataset, dataset.getRowKey(row),
dataset.getColumnKey(column));
entities.add(entity);
}
}
}
}
}
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CategoryItemLabelGenerator generator = getItemLabelGenerator(row, column);
if (generator != null && isItemLabelVisible(row, column)) {
drawItemLabel(g2, dataset, row, column, plot, generator, bar, false);
}Code: Select all
...
CategoryPlot plot = (CategoryPlot) chart.getPlot();
...
MyGanttRenderer renderer = new MyGanttRenderer();
plot.setRenderer(renderer);
...
renderer.setBaseItemLabelGenerator(new CategoryItemLabelGenerator() {
public String generateLabel(CategoryDataset dataSet, int series, int categories) {
/* your code to get the label */
return label;
}
public String generateColumnLabel(CategoryDataset dataset, int categories) {
return dataset.getColumnKey(categories).toString();
}
public String generateRowLabel(CategoryDataset dataset, int series) {
return dataset.getRowKey(series).toString();
}
});
renderer.setBaseItemLabelsVisible(true);
renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE9, TextAnchor.CENTER_LEFT));
Hallo syella, pls can you show me how you created subtasks from tasks and the code for inserting the labels. If possible can you post a sample code of a gantt.java .syella wrote:great! it works perfectly!!!
thanks a lot!!!