com.newatlanta.bluedragon.CategoryAxis.java Source code

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Here is the source code for com.newatlanta.bluedragon.CategoryAxis.java

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/* 
 *  Copyright (C) 2000 - 2008 TagServlet Ltd
 *
 *  This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
 *  
 *  OpenBD is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  Free Software Foundation,version 3.
 *  
 *  OpenBD is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with OpenBD.  If not, see http://www.gnu.org/licenses/
 *  
 *  Additional permission under GNU GPL version 3 section 7
 *  
 *  If you modify this Program, or any covered work, by linking or combining 
 *  it with any of the JARS listed in the README.txt (or a modified version of 
 *  (that library), containing parts covered by the terms of that JAR, the 
 *  licensors of this Program grant you additional permission to convey the 
 *  resulting work. 
 *  README.txt @ http://www.openbluedragon.org/license/README.txt
 *  
 *  http://www.openbluedragon.org/
 */

package com.newatlanta.bluedragon;

import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;

import org.jfree.chart.axis.AxisSpace;
import org.jfree.chart.axis.AxisState;
import org.jfree.chart.plot.Plot;
import org.jfree.ui.RectangleEdge;

/**
 * An axis that displays categories.
 */
public class CategoryAxis extends org.jfree.chart.axis.CategoryAxis implements Cloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 5886554608114265863L;

    public CategoryAxis() {
        this(null);
    }

    public CategoryAxis(String label) {

        super(label);
    }

    /*
     * This method is the same as in the parent class except that it includes a
     * fix for category labels that wrap on to multiple lines. This fix is
     * highlighted below with comments.
     */
    public AxisSpace reserveSpace(Graphics2D g2, Plot plot, Rectangle2D plotArea, RectangleEdge edge,
            AxisSpace space) {

        // create a new space object if one wasn't supplied...
        if (space == null) {
            space = new AxisSpace();
        }

        // if the axis is not visible, no additional space is required...
        if (!isVisible()) {
            return space;
        }

        // calculate the max size of the tick labels (if visible)...
        double tickLabelHeight = 0.0;
        double tickLabelWidth = 0.0;
        if (isTickLabelsVisible()) {
            g2.setFont(getTickLabelFont());
            AxisState state = new AxisState();
            // we call refresh ticks just to get the maximum width or height
            if (RectangleEdge.isTopOrBottom(edge)) {
                // BEGIN fix for category labels that wrap
                // If space has been reserved to the left and right then we need to
                // reduce the plot area
                // by this amount so that the space needed by category labels that wrap
                // on to multiple lines
                // will be calculated properly.
                Rectangle2D newPlotArea = new Rectangle2D.Double(plotArea.getX(), plotArea.getY(),
                        plotArea.getWidth() - space.getLeft() - space.getRight(), plotArea.getHeight());
                refreshTicks(g2, state, newPlotArea, edge);
                // END fix for category labels that wrap
            } else {
                refreshTicks(g2, state, plotArea, edge);
            }
            if (edge == RectangleEdge.TOP) {
                tickLabelHeight = state.getMax();
            } else if (edge == RectangleEdge.BOTTOM) {
                tickLabelHeight = state.getMax();
            } else if (edge == RectangleEdge.LEFT) {
                tickLabelWidth = state.getMax();
            } else if (edge == RectangleEdge.RIGHT) {
                tickLabelWidth = state.getMax();
            }
        }

        // get the axis label size and update the space object...
        Rectangle2D labelEnclosure = getLabelEnclosure(g2, edge);
        double labelHeight = 0.0;
        double labelWidth = 0.0;
        if (RectangleEdge.isTopOrBottom(edge)) {
            labelHeight = labelEnclosure.getHeight();
            space.add(labelHeight + tickLabelHeight + this.getCategoryLabelPositionOffset(), edge);
        } else if (RectangleEdge.isLeftOrRight(edge)) {
            labelWidth = labelEnclosure.getWidth();
            space.add(labelWidth + tickLabelWidth + this.getCategoryLabelPositionOffset(), edge);
        }
        return space;

    }
}