java-org.hwo.ui/src/org/hwo/ui/diagram/SimplePlotLabeler.java

package org.hwo.ui.diagram;

import org.hwo.ui.JDiagram;

public class SimplePlotLabeler implements PlotLabeler {

	private int decimals;
	private String ordinateFormat;
	
	
	public SimplePlotLabeler() {
		this.setDecimals(2);
	}
	
	public SimplePlotLabeler(int decimals){
		this.setDecimals(decimals);
	}
	
	public void setDecimals(int decimals) {
		this.decimals = decimals;
		this.ordinateFormat = String.format("%%.%df", decimals);
	}
	public int getDecimals() {
		return decimals;
	}
	
	
	@Override
	public String getOrdinateLabel(JDiagram diagram,int ordinate,Double value) {
		if (value == null)
			return "";
		if (value.isNaN())
			return "";		
		
		Double window = diagram.getScaler(ordinate).getWindow();
		int digits = ((Double)Math.log10(window)).intValue();
		digits -= 4;
		
		if (digits < 0){
			return String.format(
					String.format("%%.%df",-digits),
					value
					);
		} else if (digits == 0){
			return String.format("%1.2f",value);
		} else {
			return String.format(
					String.format("%%%d.2f",digits),
					value
					);
		}
	}

	@Override
	public String getAbzisseLabel(JDiagram diagram, Double pos) {
		return String.format("%.4f", pos);
	}

}