I want to create a StackedBarChart that represents Elements within a certain length. The Endresult should look something like this:
I have the data for each row (Row 1 -> A from 0,5 - 3 and B from 4,5 to 7 for example).
After playing around for a while and not finding a direct way to do this, as a workaround i tried to use a CategoryDataset with a StackedBarRenderer and "convert" my Data to the Format and just paint the empty the same as the Background.
This already is a problem, since it then tries to add both "empty" entries and just display it as one in the middle. I then simply made each "empty" entry unique and it worked fine that way. The Problem comes with the next "A" entry in Row "3" where it somehow switches the order i put the data into the dataset and displays "A" before "B" (i'm guessing to line it up with the A in the first row).
Current result of below Code.. as you can see, it's pretty close, but i guess actually very, very far away:
I don't really know what else to try right now. I have a feeling i missed something and there is a very easy way to achieve this - is there any way to do this with JFreeChart or should i use a different library?
Dataset:
private CategoryDataset createDataset() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
//testdata
dataset.addValue((Number) 0.5, "empty", 1);
dataset.addValue((Number) 2.5, "A", 1);
dataset.addValue((Number) 1.5, "empty2", 1);
dataset.addValue((Number) 2.5, "B", 1);
dataset.addValue((Number) 1.5, "empty3", 2);
dataset.addValue((Number) 2.5, "C", 2);
dataset.addValue((Number) 2, "empty4", 2);
dataset.addValue((Number) 3, "D", 2);
dataset.addValue((Number) 1, "empty5", 3);
dataset.addValue((Number) 2.5, "B", 3);
dataset.addValue((Number) 1.5, "empty6", 3);
dataset.addValue((Number) 3, "A", 3);
return dataset;
}
Chart:
plot = new CategoryPlot();
plot.setRangeAxisLocation(AxisLocation.TOP_OR_RIGHT);
plot.setOrientation(PlotOrientation.HORIZONTAL);
CategoryDataset dataset = createDataset();
CategoryAxis catAxis = new CategoryAxis();
NumberAxis numAxis = new NumberAxis();
numAxis.setVerticalTickLabels(true);
StackedBarRenderer rend = new StackedBarRenderer();
for (int i = 0; i < dataset.getRowCount(); i++) {
String currKey = (String) dataset.getRowKey(i);
if (currKey.startsWith("empty")) {
rend.setSeriesPaint(i, INVISIBLE);
rend.setSeriesItemLabelFont(i, new Font("Verdana", Font.BOLD, 0));
}
}
rend.setShadowVisible(false);
rend.setBarPainter(new StandardBarPainter());
rend.setMaximumBarWidth(HEIGHT);
rend.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator("{0}", NumberFormat.getInstance()));
rend.setBaseItemLabelsVisible(true);
plot.setDataset(dataset);
plot.setDomainAxis(catAxis);
plot.setRangeAxis(numAxis);
plot.setDomainGridlinesVisible(false);
plot.setRangeGridlinesVisible(false);
plot.setRenderer(rend);
plot.setBackgroundPaint(INVISIBLE);
JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
chart.getLegend().setVisible(false);