Logo
Distributed Genetic Programming Framework
print print

File org.jfree.chart.block.GridArrangement.java

Here you can find all the information about the file org.jfree.chart.block.GridArrangement.java. You may explore it here or download it onto your local disk.
/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * --------------------
 * GridArrangement.java
 * --------------------
 * (C) Copyright 2005, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: GridArrangement.java,v 1.6.2.1 2005/10/25 20:39:38 mungady Exp $
 *
 * Changes:
 * --------
 * 08-Feb-2005 : Version 1 (DG);
 * 
 */


package org.jfree.chart.block;

import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import java.util.Iterator;
import java.util.List;

import org.jfree.ui.Size2D;

/**
 * Arranges blocks in a grid within their container.
 */

public class GridArrangement implements Arrangement, Serializable {
    
    /** For serialization. */
    private static final long serialVersionUID = -2563758090144655938L;
    
    /** The rows. */
    private int rows;
    
    /** The columns. */
    private int columns;
    
    /**
     * Creates a new grid arrangement.
     * 
     * @param rows  the row count.
     * @param columns  the column count.
     */

    public GridArrangement(int rows, int columns) {
        this.rows = rows;
        this.columns = columns;
    }
    
    /**
     * Adds a block and a key which can be used to determine the position of 
     * the block in the arrangement.  This method is called by the container 
     * (you don't need to call this method directly) and gives the arrangement
     * an opportunity to record the details if they are required.
     * 
     * @param block  the block.
     * @param key  the key (<code>null</code> permitted).
     */

    public void add(Block block, Object key) {
        // can safely ignore   
    }
    
    /**
     * Arranges the blocks within the specified container, subject to the given
     * constraint.
     * 
     * @param container  the container.
     * @param constraint  the constraint.
     * @param g2  the graphics device.
     * 
     * @return The size following the arrangement.
     */

    public Size2D arrange(BlockContainer container, Graphics2D g2,
                          RectangleConstraint constraint) {
        LengthConstraintType w = constraint.getWidthConstraintType();
        LengthConstraintType h = constraint.getHeightConstraintType();
        if (w == LengthConstraintType.NONE) {
            if (h == LengthConstraintType.NONE) {
                return arrangeNN(container, g2);  
            }
            else if (h == LengthConstraintType.FIXED) {
                
                throw new RuntimeException("Not yet implemented.");  
            }
            else if (h == LengthConstraintType.RANGE) {
                // find optimum height, then map to range
                throw new RuntimeException("Not yet implemented.");  
            }
        }
        else if (w == LengthConstraintType.FIXED) {
            if (h == LengthConstraintType.NONE) {
                // find optimum height
                return arrangeFN(container, g2, constraint);  
            }
            else if (h == LengthConstraintType.FIXED) {
                return arrangeFF(container, g2, constraint);
            }
            else if (h == LengthConstraintType.RANGE) {
                // find optimum height and map to range
                return arrangeFR(container, g2, constraint);  
            }
        }
        else if (w == LengthConstraintType.RANGE) {
            // find optimum width and map to range
            if (h == LengthConstraintType.NONE) {
                // find optimum height
                throw new RuntimeException("Not yet implemented.");  
            }
            else if (h == LengthConstraintType.FIXED) {
                // fixed width
                throw new RuntimeException("Not yet implemented.");  
            }
            else if (h == LengthConstraintType.RANGE) {
                throw new RuntimeException("Not yet implemented.");  
            }
        }
        return new Size2D();  // TODO: complete this
    }
    
    /**
     * Arranges the container with no constraint on the width or height.
     * 
     * @param container  the container.
     * @param g2  the graphics device.
     * 
     * @return The size.
     */

    protected Size2D arrangeNN(BlockContainer container, Graphics2D g2) {
        double maxW = 0.0;
        double maxH = 0.0;
        List blocks = container.getBlocks();
        Iterator iterator = blocks.iterator();
        while (iterator.hasNext()) {
            Block b = (Block) iterator.next();
            Size2D s = b.arrange(g2, RectangleConstraint.NONE);
            maxW = Math.max(maxW, s.width);
            maxH = Math.max(maxH, s.height);
        }
        double width = this.columns * maxW;
        double height = this.rows * maxH;
        RectangleConstraint c = new RectangleConstraint(width, height);
        return arrangeFF(container, g2, c);
    }
    
    /**
     * Arranges the container with a fixed overall width and height.
     * 
     * @param container  the container.
     * @param g2  the graphics device.
     * @param constraint  the constraint.
     * 
     * @return The size following the arrangement.
     */

    protected Size2D arrangeFF(BlockContainer container, Graphics2D g2,
                               RectangleConstraint constraint) {
        double width = constraint.getWidth() /  this.columns;
        double height = constraint.getHeight() / this.rows;
        List blocks = container.getBlocks();
        for (int c = 0; c < this.columns; c++) {
            for (int r = 0; r < this.rows; r++) {
                int index = r * this.columns + c;
                if (index == blocks.size()) {
                    break;   
                }
                Block b = (Block) blocks.get(index);
                b.setBounds(new Rectangle2D.Double(
                    c * width, r * height, width, height
                ));
            }
        }
        return new Size2D(this.columns * width, this.rows * height);
    }

    /**
     * Arrange with a fixed width and a height within a given range.
     * 
     * @param container  the container.
     * @param constraint  the constraint.
     * @param g2  the graphics device.
     * 
     * @return The size of the arrangement.
     */

    protected Size2D arrangeFR(BlockContainer container, Graphics2D g2,
                               RectangleConstraint constraint) {
        
        RectangleConstraint c1 = constraint.toUnconstrainedHeight();
        Size2D size1 = arrange(container, g2, c1);

        if (constraint.getHeightRange().contains(size1.getHeight())) {
            return size1;   
        }
        else {
            double h = constraint.getHeightRange().constrain(size1.getHeight());
            RectangleConstraint c2 = constraint.toFixedHeight(h);
            return arrange(container, g2, c2);
        }
    }

    /**
     * Arrange with a fixed width and a height within a given range.
     * 
     * @param container  the container.
     * @param g2  the graphics device.
     * @param constraint  the constraint.
     * 
     * @return The size of the arrangement.
     */

    protected Size2D arrangeFN(BlockContainer container, Graphics2D g2,
                               RectangleConstraint constraint) {
        
        double width = constraint.getWidth() /  this.columns;
        RectangleConstraint constraint2 = constraint.toFixedWidth(width);
        List blocks = container.getBlocks();
        double maxH = 0.0;
        for (int r = 0; r < this.rows; r++) {
            for (int c = 0; c < this.columns; c++) {
                int index = r * this.columns + c;
                if (index == blocks.size()) {
                    break;   
                }
                Block b = (Block) blocks.get(index);
                Size2D s = b.arrange(g2, constraint2);
                maxH = Math.max(maxH, s.getHeight());
            }
        }
        RectangleConstraint constraint3 = constraint.toFixedHeight(
            maxH * this.rows
        );
        return arrange(container, g2, constraint3);
    }

    /**
     * Clears any cached layout information retained by the arrangement.
     */

    public void clear() {
        // nothing to clear   
    }
    
    /**
     * Compares this layout manager for equality with an arbitrary object.
     * 
     * @param obj  the object.
     * 
     * @return A boolean.
     */

    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof GridArrangement)) {
            return false;   
        }
        GridArrangement that = (GridArrangement) obj;
        if (this.columns != that.columns) {
            return false;   
        }
        if (this.rows != that.rows) {
            return false;   
        }
        return true;
    }

}

File Information:

file name:GridArrangement.java
package:org.jfree.chart.block
qualified name:org.jfree.chart.block.GridArrangement.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/jfree/chart/block/GridArrangement.java
size:10.070 KB (10312 B)
uploaded: 2015-07-22 04:11:02 GMT+0000
last update: 2006-08-25 12:16:44 GMT+0000
last access: 2017-11-18 23:02:49 GMT+0000

statistics online since 2006-01-02.   RSS Feed
Contact us by sending an email to tweise@gmx.de to receive further information, to report errors, or to join our project.
All content on this site (http://dgpf.sourceforge.net/) is LGPL-licensed.
http://dgpf.sourceforge.net/scripts/source/source.php last modified at 2015-07-22 04:10:53 GMT+0000 served at 2017-11-18 23:02:49 GMT+0000.
Valid CSS Valid XHTML 1.1
Valid RSS SourceForge.net Logo