home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

jfreechart example source code file (AbstractBlock.java)

This example jfreechart source code file (AbstractBlock.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

abstractblock, abstractblock, awt, blockborder, geometry, illegalargumentexception, io, null, publiccloneable, range, range, rectangle2d, rectangle2d, rectangleconstraint, rectangleinsets, rectangleinsets, size2d

The jfreechart AbstractBlock.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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.]
 *
 * ------------------
 * AbstractBlock.java
 * ------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 22-Oct-2004 : Version 1 (DG);
 * 02-Feb-2005 : Added accessor methods for margin (DG);
 * 04-Feb-2005 : Added equals() method and implemented Serializable (DG);
 * 03-May-2005 : Added null argument checks (DG);
 * 06-May-2005 : Added convenience methods for setting margin, border and
 *               padding (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 16-Mar-2007 : Changed border from BlockBorder to BlockFrame, updated
 *               equals(), and implemented Cloneable (DG);
 *
 */

package org.jfree.chart.block;

import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.jfree.data.Range;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.Size2D;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PublicCloneable;
import org.jfree.util.ShapeUtilities;

/**
 * A convenience class for creating new classes that implement
 * the {@link Block} interface.
 */
public class AbstractBlock implements Cloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 7689852412141274563L;

    /** The id for the block. */
    private String id;

    /** The margin around the outside of the block. */
    private RectangleInsets margin;

    /** The frame (or border) for the block. */
    private BlockFrame frame;

    /** The padding between the block content and the border. */
    private RectangleInsets padding;

    /**
     * The natural width of the block (may be overridden if there are
     * constraints in sizing).
     */
    private double width;

    /**
     * The natural height of the block (may be overridden if there are
     * constraints in sizing).
     */
    private double height;

    /**
     * The current bounds for the block (position of the block in Java2D space).
     */
    private transient Rectangle2D bounds;

    /**
     * Creates a new block.
     */
    protected AbstractBlock() {
        this.id = null;
        this.width = 0.0;
        this.height = 0.0;
        this.bounds = new Rectangle2D.Float();
        this.margin = RectangleInsets.ZERO_INSETS;
        this.frame = BlockBorder.NONE;
        this.padding = RectangleInsets.ZERO_INSETS;
    }

    /**
     * Returns the id.
     *
     * @return The id (possibly <code>null).
     *
     * @see #setID(String)
     */
    public String getID() {
        return this.id;
    }

    /**
     * Sets the id for the block.
     *
     * @param id  the id (<code>null permitted).
     *
     * @see #getID()
     */
    public void setID(String id) {
        this.id = id;
    }

    /**
     * Returns the natural width of the block, if this is known in advance.
     * The actual width of the block may be overridden if layout constraints
     * make this necessary.
     *
     * @return The width.
     *
     * @see #setWidth(double)
     */
    public double getWidth() {
        return this.width;
    }

    /**
     * Sets the natural width of the block, if this is known in advance.
     *
     * @param width  the width (in Java2D units)
     *
     * @see #getWidth()
     */
    public void setWidth(double width) {
        this.width = width;
    }

    /**
     * Returns the natural height of the block, if this is known in advance.
     * The actual height of the block may be overridden if layout constraints
     * make this necessary.
     *
     * @return The height.
     *
     * @see #setHeight(double)
     */
    public double getHeight() {
        return this.height;
    }

    /**
     * Sets the natural width of the block, if this is known in advance.
     *
     * @param height  the width (in Java2D units)
     *
     * @see #getHeight()
     */
    public void setHeight(double height) {
        this.height = height;
    }

    /**
     * Returns the margin.
     *
     * @return The margin (never <code>null).
     *
     * @see #getMargin()
     */
    public RectangleInsets getMargin() {
        return this.margin;
    }

    /**
     * Sets the margin (use {@link RectangleInsets#ZERO_INSETS} for no
     * padding).
     *
     * @param margin  the margin (<code>null not permitted).
     *
     * @see #getMargin()
     */
    public void setMargin(RectangleInsets margin) {
        if (margin == null) {
            throw new IllegalArgumentException("Null 'margin' argument.");
        }
        this.margin = margin;
    }

    /**
     * Sets the margin.
     *
     * @param top  the top margin.
     * @param left  the left margin.
     * @param bottom  the bottom margin.
     * @param right  the right margin.
     *
     * @see #getMargin()
     */
    public void setMargin(double top, double left, double bottom,
                          double right) {
        setMargin(new RectangleInsets(top, left, bottom, right));
    }

    /**
     * Returns the border.
     *
     * @return The border (never <code>null).
     *
     * @deprecated Use {@link #getFrame()} instead.
     */
    public BlockBorder getBorder() {
        if (this.frame instanceof BlockBorder) {
            return (BlockBorder) this.frame;
        }
        else {
            return null;
        }
    }

    /**
     * Sets the border for the block (use {@link BlockBorder#NONE} for
     * no border).
     *
     * @param border  the border (<code>null not permitted).
     *
     * @see #getBorder()
     *
     * @deprecated Use {@link #setFrame(BlockFrame)} instead.
     */
    public void setBorder(BlockBorder border) {
        setFrame(border);
    }

    /**
     * Sets a black border with the specified line widths.
     *
     * @param top  the top border line width.
     * @param left  the left border line width.
     * @param bottom  the bottom border line width.
     * @param right  the right border line width.
     */
    public void setBorder(double top, double left, double bottom,
                          double right) {
        setFrame(new BlockBorder(top, left, bottom, right));
    }

    /**
     * Returns the current frame (border).
     *
     * @return The frame.
     *
     * @since 1.0.5
     * @see #setFrame(BlockFrame)
     */
    public BlockFrame getFrame() {
        return this.frame;
    }

    /**
     * Sets the frame (or border).
     *
     * @param frame  the frame (<code>null not permitted).
     *
     * @since 1.0.5
     * @see #getFrame()
     */
    public void setFrame(BlockFrame frame) {
        if (frame == null) {
            throw new IllegalArgumentException("Null 'frame' argument.");
        }
        this.frame = frame;
    }

    /**
     * Returns the padding.
     *
     * @return The padding (never <code>null).
     *
     * @see #setPadding(RectangleInsets)
     */
    public RectangleInsets getPadding() {
        return this.padding;
    }

    /**
     * Sets the padding (use {@link RectangleInsets#ZERO_INSETS} for no
     * padding).
     *
     * @param padding  the padding (<code>null not permitted).
     *
     * @see #getPadding()
     */
    public void setPadding(RectangleInsets padding) {
        if (padding == null) {
            throw new IllegalArgumentException("Null 'padding' argument.");
        }
        this.padding = padding;
    }

    /**
     * Sets the padding.
     *
     * @param top  the top padding.
     * @param left  the left padding.
     * @param bottom  the bottom padding.
     * @param right  the right padding.
     */
    public void setPadding(double top, double left, double bottom,
                           double right) {
        setPadding(new RectangleInsets(top, left, bottom, right));
    }

    /**
     * Returns the x-offset for the content within the block.
     *
     * @return The x-offset.
     *
     * @see #getContentYOffset()
     */
    public double getContentXOffset() {
        return this.margin.getLeft() + this.frame.getInsets().getLeft()
            + this.padding.getLeft();
    }

    /**
     * Returns the y-offset for the content within the block.
     *
     * @return The y-offset.
     *
     * @see #getContentXOffset()
     */
    public double getContentYOffset() {
        return this.margin.getTop() + this.frame.getInsets().getTop()
            + this.padding.getTop();
    }

    /**
     * Arranges the contents of the block, with no constraints, and returns
     * the block size.
     *
     * @param g2  the graphics device.
     *
     * @return The block size (in Java2D units, never <code>null).
     */
    public Size2D arrange(Graphics2D g2) {
        return arrange(g2, RectangleConstraint.NONE);
    }

    /**
     * Arranges the contents of the block, within the given constraints, and
     * returns the block size.
     *
     * @param g2  the graphics device.
     * @param constraint  the constraint (<code>null not permitted).
     *
     * @return The block size (in Java2D units, never <code>null).
     */
    public Size2D arrange(Graphics2D g2, RectangleConstraint constraint) {
        Size2D base = new Size2D(getWidth(), getHeight());
        return constraint.calculateConstrainedSize(base);
    }

    /**
     * Returns the current bounds of the block.
     *
     * @return The bounds.
     *
     * @see #setBounds(Rectangle2D)
     */
    public Rectangle2D getBounds() {
        return this.bounds;
    }

    /**
     * Sets the bounds of the block.
     *
     * @param bounds  the bounds (<code>null not permitted).
     *
     * @see #getBounds()
     */
    public void setBounds(Rectangle2D bounds) {
        if (bounds == null) {
            throw new IllegalArgumentException("Null 'bounds' argument.");
        }
        this.bounds = bounds;
    }

    /**
     * Calculate the width available for content after subtracting
     * the margin, border and padding space from the specified fixed
     * width.
     *
     * @param fixedWidth  the fixed width.
     *
     * @return The available space.
     *
     * @see #trimToContentHeight(double)
     */
    protected double trimToContentWidth(double fixedWidth) {
        double result = this.margin.trimWidth(fixedWidth);
        result = this.frame.getInsets().trimWidth(result);
        result = this.padding.trimWidth(result);
        return Math.max(result, 0.0);
    }

    /**
     * Calculate the height available for content after subtracting
     * the margin, border and padding space from the specified fixed
     * height.
     *
     * @param fixedHeight  the fixed height.
     *
     * @return The available space.
     *
     * @see #trimToContentWidth(double)
     */
    protected double trimToContentHeight(double fixedHeight) {
        double result = this.margin.trimHeight(fixedHeight);
        result = this.frame.getInsets().trimHeight(result);
        result = this.padding.trimHeight(result);
        return Math.max(result, 0.0);
    }

    /**
     * Returns a constraint for the content of this block that will result in
     * the bounds of the block matching the specified constraint.
     *
     * @param c  the outer constraint (<code>null not permitted).
     *
     * @return The content constraint.
     */
    protected RectangleConstraint toContentConstraint(RectangleConstraint c) {
        if (c == null) {
            throw new IllegalArgumentException("Null 'c' argument.");
        }
        if (c.equals(RectangleConstraint.NONE)) {
            return c;
        }
        double w = c.getWidth();
        Range wr = c.getWidthRange();
        double h = c.getHeight();
        Range hr = c.getHeightRange();
        double ww = trimToContentWidth(w);
        double hh = trimToContentHeight(h);
        Range wwr = trimToContentWidth(wr);
        Range hhr = trimToContentHeight(hr);
        return new RectangleConstraint(
            ww, wwr, c.getWidthConstraintType(),
            hh, hhr, c.getHeightConstraintType()
        );
    }

    private Range trimToContentWidth(Range r) {
        if (r == null) {
            return null;
        }
        double lowerBound = 0.0;
        double upperBound = Double.POSITIVE_INFINITY;
        if (r.getLowerBound() > 0.0) {
            lowerBound = trimToContentWidth(r.getLowerBound());
        }
        if (r.getUpperBound() < Double.POSITIVE_INFINITY) {
            upperBound = trimToContentWidth(r.getUpperBound());
        }
        return new Range(lowerBound, upperBound);
    }

    private Range trimToContentHeight(Range r) {
        if (r == null) {
            return null;
        }
        double lowerBound = 0.0;
        double upperBound = Double.POSITIVE_INFINITY;
        if (r.getLowerBound() > 0.0) {
            lowerBound = trimToContentHeight(r.getLowerBound());
        }
        if (r.getUpperBound() < Double.POSITIVE_INFINITY) {
            upperBound = trimToContentHeight(r.getUpperBound());
        }
        return new Range(lowerBound, upperBound);
    }

    /**
     * Adds the margin, border and padding to the specified content width.
     *
     * @param contentWidth  the content width.
     *
     * @return The adjusted width.
     */
    protected double calculateTotalWidth(double contentWidth) {
        double result = contentWidth;
        result = this.padding.extendWidth(result);
        result = this.frame.getInsets().extendWidth(result);
        result = this.margin.extendWidth(result);
        return result;
    }

    /**
     * Adds the margin, border and padding to the specified content height.
     *
     * @param contentHeight  the content height.
     *
     * @return The adjusted height.
     */
    protected double calculateTotalHeight(double contentHeight) {
        double result = contentHeight;
        result = this.padding.extendHeight(result);
        result = this.frame.getInsets().extendHeight(result);
        result = this.margin.extendHeight(result);
        return result;
    }

    /**
     * Reduces the specified area by the amount of space consumed
     * by the margin.
     *
     * @param area  the area (<code>null not permitted).
     *
     * @return The trimmed area.
     */
    protected Rectangle2D trimMargin(Rectangle2D area) {
        // defer argument checking...
        this.margin.trim(area);
        return area;
    }

    /**
     * Reduces the specified area by the amount of space consumed
     * by the border.
     *
     * @param area  the area (<code>null not permitted).
     *
     * @return The trimmed area.
     */
    protected Rectangle2D trimBorder(Rectangle2D area) {
        // defer argument checking...
        this.frame.getInsets().trim(area);
        return area;
    }

    /**
     * Reduces the specified area by the amount of space consumed
     * by the padding.
     *
     * @param area  the area (<code>null not permitted).
     *
     * @return The trimmed area.
     */
    protected Rectangle2D trimPadding(Rectangle2D area) {
        // defer argument checking...
        this.padding.trim(area);
        return area;
    }

    /**
     * Draws the border around the perimeter of the specified area.
     *
     * @param g2  the graphics device.
     * @param area  the area.
     */
    protected void drawBorder(Graphics2D g2, Rectangle2D area) {
        this.frame.draw(g2, area);
    }

    /**
     * Tests this block for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof AbstractBlock)) {
            return false;
        }
        AbstractBlock that = (AbstractBlock) obj;
        if (!ObjectUtilities.equal(this.id, that.id)) {
            return false;
        }
        if (!this.frame.equals(that.frame)) {
            return false;
        }
        if (!this.bounds.equals(that.bounds)) {
            return false;
        }
        if (!this.margin.equals(that.margin)) {
            return false;
        }
        if (!this.padding.equals(that.padding)) {
            return false;
        }
        if (this.height != that.height) {
            return false;
        }
        if (this.width != that.width) {
            return false;
        }
        return true;
    }

    /**
     * Returns a clone of this block.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if there is a problem creating the
     *         clone.
     */
    public Object clone() throws CloneNotSupportedException {
        AbstractBlock clone = (AbstractBlock) super.clone();
        clone.bounds = (Rectangle2D) ShapeUtilities.clone(this.bounds);
        if (this.frame instanceof PublicCloneable) {
            PublicCloneable pc = (PublicCloneable) this.frame;
            clone.frame = (BlockFrame) pc.clone();
        }
        return clone;
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writeShape(this.bounds, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream)
        throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.bounds = (Rectangle2D) SerialUtilities.readShape(stream);
    }

}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart AbstractBlock.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.