/*
 * @(#)CTallyChartUI.java	0.0.1 99/07/29
 *
 * Copyright (c) 1999 by Willie Wheeler.  All rights reserved.
 */
package stats.plaf.concrete;

import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.*;
import stats.*;
import stats.plaf.*;

/**
 * @version	0.0.1 07/29/99
 * @author	Willie Wheeler
 */
public class CTallyChartUI extends TallyChartUI {

    protected static CTallyChartUI	ui = new CTallyChartUI();

    private static final int		STROKE_HEIGHT = 20;
    private static final int		STROKE_VGAP = 5;
    private static final int		STROKE_HGAP = 4;
    private static final int		XPAD = 5;
    private static final int		YPAD = 5;

    /**
     * Returns a static <tt>BasicTallyChartUI</tt> object.
     */
    public static ComponentUI createUI(JComponent c) { return ui; }

    public void paint(Graphics g, JComponent c) {

	// For convenience.
	Chart chart = (Chart)c;
	int numCats = chart.getNumStates();

	// Initialize.
	int tallyHeight =
	    (numCats * STROKE_HEIGHT) + ((numCats-1) * STROKE_VGAP);
	g.translate(XPAD, (c.getSize().height - tallyHeight) / 2);
	int hpos = 0;
	int vpos = 0;

	// Loop over data.
	for (int i = 0; i < numCats; i++) {
	    hpos = 0;
	    vpos = ((STROKE_HEIGHT + STROKE_VGAP) * i);
	    g.setColor(chart.getStateColor(i));

	    // Paint strokes.
	    for (int j = 1; j <= (int)chart.getStateValue(i); j++) {
		hpos = STROKE_HGAP * j;
		if (j%5 > 0) {

		    // Vertical stroke.
		    g.drawLine(hpos, vpos, hpos, vpos + STROKE_HEIGHT);
		    g.drawLine(hpos+1, vpos, hpos+1, vpos + STROKE_HEIGHT);

		} else {

		    // Diagonal stroke.
		    g.drawLine(hpos, vpos+2,
			       STROKE_HGAP*(j-5), vpos+STROKE_HEIGHT-3);
		    g.drawLine(hpos, vpos+3,
			       STROKE_HGAP*(j-5), vpos+STROKE_HEIGHT-2);

		}
	    }

	    // Paint value label.
	    g.setColor(Color.black);
	    g.drawString(chart.getStateValueAsString(i),
			 hpos+10, vpos+STROKE_HEIGHT-3);
	}
    }
}