franta-hg@1: package de.laures.cewolf.cpp;
franta-hg@1: 
franta-hg@1: import java.util.Map;
franta-hg@1: 
franta-hg@1: import org.jfree.chart.JFreeChart;
franta-hg@1: import org.jfree.chart.axis.CategoryAxis;
franta-hg@1: import org.jfree.chart.axis.CategoryLabelPositions;
franta-hg@1: import org.jfree.chart.plot.CategoryPlot;
franta-hg@1: import org.jfree.data.category.CategoryDataset;
franta-hg@1: 
franta-hg@1: import de.laures.cewolf.ChartPostProcessor;
franta-hg@1: 
franta-hg@1: /**
franta-hg@1: * A cewolf post-processor for rotating and/or removing the labels on the X-Axis
franta-hg@1: * parameters:
franta-hg@1: * rotate_at: make the labels vertical
franta-hg@1: * skip_at: print only some of the labels (so they don't overlap)
franta-hg@1: * remove_at: don't print any labels
franta-hg@1: *
franta-hg@1: * Usage:
franta-hg@1: * <chart:chartpostprocessor id="labelRotation">
franta-hg@1: * <chart:param name="rotate_at" value='<%= new Integer(10) %>'/>
franta-hg@1: * <chart:param name="skip_at" value='<%= new Integer(50) %>'/>
franta-hg@1: * <chart:param name="remove_at" value='<%= new Integer(100) %>'/>
franta-hg@1: * </chart:chartpostprocessor>
franta-hg@1: *
franta-hg@1: *
franta-hg@1: * @author Rich Unger
franta-hg@1: */
franta-hg@1: 
franta-hg@1: public class RotatedAxisLabels implements ChartPostProcessor {
franta-hg@1: 	
franta-hg@1: public void processChart(Object chart, Map params) {
franta-hg@1: 		CategoryPlot plot = (CategoryPlot) ((JFreeChart) chart).getPlot();
franta-hg@1: 
franta-hg@1: 		CategoryAxis axis = plot.getDomainAxis();
franta-hg@1: 
franta-hg@1: 		Number rotateThreshold = (Number) params.get("rotate_at");
franta-hg@1: 		Number skipThreshold = (Number) params.get("skip_at");
franta-hg@1: 		Number removeThreshold = (Number) params.get("remove_at");
franta-hg@1: 
franta-hg@1: 		CategoryDataset dataset = plot.getDataset();
franta-hg@1: 		int iCategoryCount = dataset.getRowCount();
franta-hg@1: 
franta-hg@1: 		if (rotateThreshold != null) 
franta-hg@1:     {
franta-hg@1:       if (iCategoryCount >= rotateThreshold.intValue()) 
franta-hg@1:       {
franta-hg@1:         axis.setCategoryLabelPositions(CategoryLabelPositions.UP_90);
franta-hg@1:       }
franta-hg@1:       else 
franta-hg@1:       {
franta-hg@1:         axis.setCategoryLabelPositions(CategoryLabelPositions.STANDARD);
franta-hg@1:       }
franta-hg@1: 
franta-hg@1:     }
franta-hg@1:     
franta-hg@1: 		if (skipThreshold != null) 
franta-hg@1:     {
franta-hg@1:       //this method does nothing in jfreechart .9.18
franta-hg@1: 			//axis.setSkipCategoryLabelsToFit(iCategoryCount >= skipThreshold.intValue());
franta-hg@1: 		}
franta-hg@1: 		
franta-hg@1:     if (removeThreshold != null) 
franta-hg@1:     {
franta-hg@1: 			axis.setTickLabelsVisible(iCategoryCount < removeThreshold.intValue());
franta-hg@1: 		}
franta-hg@1: 	}
franta-hg@1: 	
franta-hg@1: }