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JFreeChart is a class library, written in Java, for generating charts. Utilising the Java2D APIs, it currently
supports bar charts, pie charts, line charts, XY-plots and time series plots.
/* ===========================================================
* 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.]
*
* ------------------------
* RectangleConstraint.java
* ------------------------
* (C) Copyright 2004, 2005, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: RectangleConstraint.java,v 1.5.2.1 2005/10/25 20:39:38 mungady Exp $
*
* Changes:
* --------
* 22-Oct-2004 : Version 1 (DG);
* 02-Feb-2005 : Added toString() method (DG);
* 08-Feb-2005 : Separated height and width constraints (DG);
* 13-May-2005 : Added convenience constructor and new methods for
* transforming constraints (DG);
*
*/
package org.jfree.chart.block;
import org.jfree.data.Range;
import org.jfree.ui.Size2D;
/**
* A description of a constraint for resizing a rectangle. Constraints are
* immutable.
*/
public class RectangleConstraint {
/**
* An instance representing no constraint.
*/
public static final RectangleConstraint NONE = new RectangleConstraint(
0.0, null, LengthConstraintType.NONE,
0.0, null, LengthConstraintType.NONE
);
/** The width. */
private double width;
/** The width range. */
private Range widthRange;
/** The width constraint type. */
private LengthConstraintType widthConstraintType;
/** The fixed or maximum height. */
private double height;
private Range heightRange;
/** The constraint type. */
private LengthConstraintType heightConstraintType;
/**
* Creates a new "fixed width and height" instance.
*
* @param w the fixed width.
* @param h the fixed height.
*/
public RectangleConstraint(double w, double h) {
this(
w, null, LengthConstraintType.FIXED,
h, null, LengthConstraintType.FIXED
);
}
/**
* Creates a new "range width and height" instance.
*
* @param w the width range.
* @param h the height range.
*/
public RectangleConstraint(Range w, Range h) {
this(
0.0, w, LengthConstraintType.RANGE,
0.0, h, LengthConstraintType.RANGE
);
}
/**
* Creates a new constraint with a range for the width and a
* fixed height.
*
* @param w the width range.
* @param h the fixed height.
*/
public RectangleConstraint(Range w, double h) {
this(
0.0, w, LengthConstraintType.RANGE,
h, null, LengthConstraintType.FIXED
);
}
/**
* Creates a new constraint with a fixed width and a range for
* the height.
*
* @param w the fixed width.
* @param h the height range.
*/
public RectangleConstraint(double w, Range h) {
this(
w, null, LengthConstraintType.FIXED,
0.0, h, LengthConstraintType.RANGE
);
}
/**
* Creates a new constraint.
*
* @param w the fixed or maximum width.
* @param widthRange the width range.
* @param widthConstraintType the width type.
* @param h the fixed or maximum height.
* @param heightRange the height range.
* @param heightConstraintType the height type.
*/
public RectangleConstraint(double w, Range widthRange,
LengthConstraintType widthConstraintType,
double h, Range heightRange,
LengthConstraintType heightConstraintType) {
if (widthConstraintType == null) {
throw new IllegalArgumentException("Null 'widthType' argument.");
}
if (heightConstraintType == null) {
throw new IllegalArgumentException("Null 'heightType' argument.");
}
this.width = w;
this.widthRange = widthRange;
this.widthConstraintType = widthConstraintType;
this.height = h;
this.heightRange = heightRange;
this.heightConstraintType = heightConstraintType;
}
/**
* Returns the fixed width.
*
* @return The width.
*/
public double getWidth() {
return this.width;
}
/**
* Returns the width range.
*
* @return The range (possibly null).
*/
public Range getWidthRange() {
return this.widthRange;
}
/**
* Returns the constraint type.
*
* @return The constraint type (never null).
*/
public LengthConstraintType getWidthConstraintType() {
return this.widthConstraintType;
}
/**
* Returns the fixed height.
*
* @return The height.
*/
public double getHeight() {
return this.height;
}
/**
* Returns the width range.
*
* @return The range (possibly null).
*/
public Range getHeightRange() {
return this.heightRange;
}
/**
* Returns the constraint type.
*
* @return The constraint type (never null).
*/
public LengthConstraintType getHeightConstraintType() {
return this.heightConstraintType;
}
/**
* Returns a constraint that matches this one on the height attributes,
* but has no width constraint.
*
* @return A new constraint.
*/
public RectangleConstraint toUnconstrainedWidth() {
if (this.widthConstraintType == LengthConstraintType.NONE) {
return this;
}
else {
return new RectangleConstraint(
this.width, this.widthRange, LengthConstraintType.NONE,
this.height, this.heightRange, this.heightConstraintType
);
}
}
/**
* Returns a constraint that matches this one on the width attributes,
* but has no height constraint.
*
* @return A new constraint.
*/
public RectangleConstraint toUnconstrainedHeight() {
if (this.heightConstraintType == LengthConstraintType.NONE) {
return this;
}
else {
return new RectangleConstraint(
this.width, this.widthRange, this.widthConstraintType,
0.0, this.heightRange, LengthConstraintType.NONE
);
}
}
/**
* Returns a constraint that matches this one on the height attributes,
* but has a fixed width constraint.
*
* @param width the fixed width.
*
* @return A new constraint.
*/
public RectangleConstraint toFixedWidth(double width) {
return new RectangleConstraint(
width, this.widthRange, LengthConstraintType.FIXED,
this.height, this.heightRange, this.heightConstraintType
);
}
/**
* Returns a constraint that matches this one on the width attributes,
* but has a fixed height constraint.
*
* @param height the fixed height.
*
* @return A new constraint.
*/
public RectangleConstraint toFixedHeight(double height) {
return new RectangleConstraint(
this.width, this.widthRange, this.widthConstraintType,
height, this.heightRange, LengthConstraintType.FIXED
);
}
/**
* Returns a constraint that matches this one on the height attributes,
* but has a range width constraint.
*
* @param range the width range (null not permitted).
*
* @return A new constraint.
*/
public RectangleConstraint toRangeWidth(Range range) {
if (range == null) {
throw new IllegalArgumentException("Null 'range' argument.");
}
return new RectangleConstraint(
range.getUpperBound(), range, LengthConstraintType.RANGE,
this.height, this.heightRange, this.heightConstraintType
);
}
/**
* Returns a constraint that matches this one on the width attributes,
* but has a range height constraint.
*
* @param range the height range (null not permitted).
*
* @return A new constraint.
*/
public RectangleConstraint toRangeHeight(Range range) {
if (range == null) {
throw new IllegalArgumentException("Null 'range' argument.");
}
return new RectangleConstraint(
this.width, this.widthRange, this.widthConstraintType,
range.getUpperBound(), range, LengthConstraintType.RANGE
);
}
/**
* Returns a string representation of this instance, mostly used for
* debugging purposes.
*
* @return A string.
*/
public String toString() {
return "RectangleConstraint["
+ this.widthConstraintType.toString() + ": width="
+ this.width + ", height=" + this.height + "]";
}
/**
* Returns the new size that reflects the constraints defined by this
* instance.
*
* @param base the base size.
*
* @return The constrained size.
*/
public Size2D calculateConstrainedSize(Size2D base) {
Size2D result = new Size2D();
if (this.widthConstraintType == LengthConstraintType.NONE) {
result.width = base.width;
if (this.heightConstraintType == LengthConstraintType.NONE) {
result.height = base.height;
}
else if (this.heightConstraintType == LengthConstraintType.RANGE) {
result.height = this.heightRange.constrain(base.height);
}
else if (this.heightConstraintType == LengthConstraintType.FIXED) {
result.height = this.height;
}
}
else if (this.widthConstraintType == LengthConstraintType.RANGE) {
result.width = this.widthRange.constrain(base.width);
if (this.heightConstraintType == LengthConstraintType.NONE) {
result.height = base.height;
}
else if (this.heightConstraintType == LengthConstraintType.RANGE) {
result.height = this.heightRange.constrain(base.height);
}
else if (this.heightConstraintType == LengthConstraintType.FIXED) {
result.height = this.height;
}
}
else if (this.widthConstraintType == LengthConstraintType.FIXED) {
result.width = this.width;
if (this.heightConstraintType == LengthConstraintType.NONE) {
result.height = base.height;
}
else if (this.heightConstraintType == LengthConstraintType.RANGE) {
result.height = this.heightRange.constrain(base.height);
}
else if (this.heightConstraintType == LengthConstraintType.FIXED) {
result.height = this.height;
}
}
return result;
}
}
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