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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D API, it supports a wide range of chart types including
bar charts, pie charts, line charts, XY-plots, time series plots, Sankey charts
and more.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-present, by David Gilbert 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------
* AbstractBlock.java
* ------------------
* (C) Copyright 2004-present, by David Gilbert.
*
* Original Author: David Gilbert;
* Contributor(s): Tracy Hiltbrand (equals/hashCode comply with EqualsVerifier);
*
*/
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 java.util.Objects;
import org.jfree.chart.ui.RectangleInsets;
import org.jfree.chart.ui.Size2D;
import org.jfree.chart.util.Args;
import org.jfree.chart.util.PublicCloneable;
import org.jfree.chart.util.SerialUtils;
import org.jfree.chart.util.ShapeUtils;
import org.jfree.data.Range;
/**
* 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) {
Args.nullNotPermitted(margin, "margin");
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));
}
/**
* 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.
*
* @see #setFrame(BlockFrame)
*/
public BlockFrame getFrame() {
return this.frame;
}
/**
* Sets the frame (or border).
*
* @param frame the frame ({@code null} not permitted).
*
* @see #getFrame()
*/
public void setFrame(BlockFrame frame) {
Args.nullNotPermitted(frame, "frame");
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) {
Args.nullNotPermitted(padding, "padding");
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) {
Args.nullNotPermitted(bounds, "bounds");
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) {
Args.nullNotPermitted(c, "c");
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.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof AbstractBlock)) {
return false;
}
AbstractBlock that = (AbstractBlock) obj;
if (!Objects.equals(this.id, that.id)) {
return false;
}
if (!Objects.equals(this.frame, that.frame)) {
return false;
}
if (!Objects.equals(this.bounds, that.bounds)) {
return false;
}
if (!Objects.equals(this.margin, that.margin)) {
return false;
}
if (!Objects.equals(this.padding, that.padding)) {
return false;
}
if (Double.doubleToLongBits(this.height) !=
Double.doubleToLongBits(that.height)) {
return false;
}
if (Double.doubleToLongBits(this.width) !=
Double.doubleToLongBits(that.width)) {
return false;
}
// fix the "equals not symmetric" problem
if (!that.canEqual(this)) {
return false;
}
return true;
}
/**
* Ensures symmetry between super/subclass implementations of equals. For
* more detail, see http://jqno.nl/equalsverifier/manual/inheritance.
*
* @param other Object
*
* @return true ONLY if the parameter is THIS class type
*/
public boolean canEqual(Object other) {
// fix the "equals not symmetric" problem
return (other instanceof AbstractBlock);
}
@Override
public int hashCode() {
int hash = 3;
hash = 89 * hash + Objects.hashCode(this.id);
hash = 89 * hash + Objects.hashCode(this.margin);
hash = 89 * hash + Objects.hashCode(this.frame);
hash = 89 * hash + Objects.hashCode(this.padding);
hash = 89 * hash + Objects.hashCode(this.bounds);
hash = 89 * hash +
(int) (Double.doubleToLongBits(this.width) ^
(Double.doubleToLongBits(this.width) >>> 32));
hash = 89 * hash +
(int) (Double.doubleToLongBits(this.height) ^
(Double.doubleToLongBits(this.height) >>> 32));
return hash;
}
/**
* Returns a clone of this block.
*
* @return A clone.
*
* @throws CloneNotSupportedException if there is a problem creating the
* clone.
*/
@Override
public Object clone() throws CloneNotSupportedException {
AbstractBlock clone = (AbstractBlock) super.clone();
clone.bounds = (Rectangle2D) ShapeUtils.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();
SerialUtils.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) SerialUtils.readShape(stream);
}
}
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