/**
* 自定義Item標籤生成器
* 生成百分比的ItemLabel
* @author mervin（馬建新）
*
*/
public class ItemLabelDemo2 extends ApplicationFrame
{
/**
* 自定義標籤生成器
*/
static class LabelGenerator extends AbstractCategoryItemLabelGenerator implements CategoryItemLabelGenerator
{
private Integer category;
private NumberFormat formatter = NumberFormat.getPercentInstance();
 
public LabelGenerator(int i)
{
this(new Integer(i));
}
public LabelGenerator(Integer integer)
{
super("", NumberFormat.getInstance());
category = integer;
}
public String generateLabel(CategoryDataset categorydataset, int i,
int i_0_)
{
String string = null;
double d = 0.0;
if (category != null)
{
Number number 
 
= categorydataset.getValue(i, category.intValue());
d = number.doubleValue();
} else
d = calculateSeriesTotal(categorydataset, i);
Number number = categorydataset.getValue(i, i_0_);
if (number != null)
{
double d_1_ = number.doubleValue();
string = (number.toString() + " (" + formatter.format(d_1_ / d) + ")");
}
 
return string;
}
//計算總計
private double calculateSeriesTotal(CategoryDataset categorydataset,int i)
{
double d = 0.0;
for (int i_2_ = 0; i_2_ < categorydataset.getColumnCount(); i_2_++)
{
Number number = categorydataset.getValue(i, i_2_);
if (number != null)
d += number.doubleValue();
}
return d;
}
}
public ItemLabelDemo2(String string)
{
super(string);
CategoryDataset categorydataset = createDataset();
JFreeChart jfreechart = createChart(categorydataset);
ChartPanel chartpanel = new ChartPanel(jfreechart);
chartpanel.setPreferredSize(new Dimension(500, 270));
setContentPane(chartpanel);
}
private static CategoryDataset createDataset()
{
DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
defaultcategorydataset.addValue(100.0, "S1", "C1");
defaultcategorydataset.addValue(44.3, "S1", "C2");
defaultcategorydataset.addValue(93.0, "S1", "C3");
defaultcategorydataset.addValue(80.0, "S2", "C1");
defaultcategorydataset.addValue(75.1, "S2", "C2");
defaultcategorydataset.addValue(15.1, "S2", "C3");
return defaultcategorydataset;
}
private static JFreeChart createChart(CategoryDataset categorydataset)
{
JFreeChart jfreechart = ChartFactory.createBarChart(
"Item Label Demo 2", "Category", "Value", categorydataset,
PlotOrientation.HORIZONTAL, true, true, false);
jfreechart.setBackgroundPaint(Color.white);
CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot();
categoryplot.setBackgroundPaint(Color.lightGray);
categoryplot.setDomainGridlinePaint(Color.white);
categoryplot.setRangeGridlinePaint(Color.white);
categoryplot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
numberaxis.setUpperMargin(0.25);
CategoryItemRenderer categoryitemrenderer = categoryplot.getRenderer();
categoryitemrenderer.setBaseItemLabelsVisible(true);
categoryitemrenderer.setBaseItemLabelGenerator(new LabelGenerator(
(Integer) null));
return jfreechart;
}
public static JPanel createDemoPanel()
{
JFreeChart jfreechart = createChart(createDataset());
return new ChartPanel(jfreechart);
}
public static void main(String[] strings)
{
ItemLabelDemo2 itemlabeldemo2 = new ItemLabelDemo2("Item Label Demo 2");
itemlabeldemo2.pack();
RefineryUtilities.centerFrameOnScreen(itemlabeldemo2);
itemlabeldemo2.setVisible(true);
}
}