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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 2000-2011, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ----------------------
* ColumnArrangement.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);
* 04-Feb-2005 : Added equals() and implemented Serializable (DG);
*
*/
package org.jfree.chart.block;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.jfree.ui.HorizontalAlignment;
import org.jfree.ui.Size2D;
import org.jfree.ui.VerticalAlignment;
/**
* Arranges blocks in a column layout. This class is immutable.
*/
public class ColumnArrangement implements Arrangement, Serializable {
/** For serialization. */
private static final long serialVersionUID = -5315388482898581555L;
/** The horizontal alignment of blocks. */
private HorizontalAlignment horizontalAlignment;
/** The vertical alignment of blocks within each row. */
private VerticalAlignment verticalAlignment;
/** The horizontal gap between columns. */
private double horizontalGap;
/** The vertical gap between items in a column. */
private double verticalGap;
/**
* Creates a new instance.
*/
public ColumnArrangement() {
}
/**
* Creates a new instance.
*
* @param hAlign the horizontal alignment (currently ignored).
* @param vAlign the vertical alignment (currently ignored).
* @param hGap the horizontal gap.
* @param vGap the vertical gap.
*/
public ColumnArrangement(HorizontalAlignment hAlign,
VerticalAlignment vAlign,
double hGap, double vGap) {
this.horizontalAlignment = hAlign;
this.verticalAlignment = vAlign;
this.horizontalGap = hGap;
this.verticalGap = vGap;
}
/**
* Adds a block to be managed by this instance. This method is usually
* called by the {@link BlockContainer}, you shouldn't need to call it
* directly.
*
* @param block the block.
* @param key a key that controls the position of the block.
*/
public void add(Block block, Object key) {
// since the flow layout is relatively straightforward, no information
// needs to be recorded here
}
/**
* Calculates and sets the bounds of all the items in the specified
* container, subject to the given constraint. The Graphics2D
* can be used by some items (particularly items containing text) to
* calculate sizing parameters.
*
* @param container the container whose items are being arranged.
* @param g2 the graphics device.
* @param constraint the size constraint.
*
* @return The size of the container after arrangement of the contents.
*/
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 implemented.");
}
else if (h == LengthConstraintType.RANGE) {
throw new RuntimeException("Not implemented.");
}
}
else if (w == LengthConstraintType.FIXED) {
if (h == LengthConstraintType.NONE) {
throw new RuntimeException("Not implemented.");
}
else if (h == LengthConstraintType.FIXED) {
return arrangeFF(container, g2, constraint);
}
else if (h == LengthConstraintType.RANGE) {
throw new RuntimeException("Not implemented.");
}
}
else if (w == LengthConstraintType.RANGE) {
if (h == LengthConstraintType.NONE) {
throw new RuntimeException("Not implemented.");
}
else if (h == LengthConstraintType.FIXED) {
return arrangeRF(container, g2, constraint);
}
else if (h == LengthConstraintType.RANGE) {
return arrangeRR(container, g2, constraint);
}
}
return new Size2D(); // TODO: complete this
}
/**
* Calculates and sets the bounds of all the items in the specified
* container, subject to the given constraint. The Graphics2D
* can be used by some items (particularly items containing text) to
* calculate sizing parameters.
*
* @param container the container whose items are being arranged.
* @param g2 the graphics device.
* @param constraint the size constraint.
*
* @return The container size after the arrangement.
*/
protected Size2D arrangeFF(BlockContainer container, Graphics2D g2,
RectangleConstraint constraint) {
// TODO: implement properly
return arrangeNF(container, g2, constraint);
}
/**
* Calculates and sets the bounds of all the items in the specified
* container, subject to the given constraint. The Graphics2D
* can be used by some items (particularly items containing text) to
* calculate sizing parameters.
*
* @param container the container whose items are being arranged.
* @param constraint the size constraint.
* @param g2 the graphics device.
*
* @return The container size after the arrangement.
*/
protected Size2D arrangeNF(BlockContainer container, Graphics2D g2,
RectangleConstraint constraint) {
List blocks = container.getBlocks();
double height = constraint.getHeight();
if (height <= 0.0) {
height = Double.POSITIVE_INFINITY;
}
double x = 0.0;
double y = 0.0;
double maxWidth = 0.0;
List itemsInColumn = new ArrayList();
for (int i = 0; i < blocks.size(); i++) {
Block block = (Block) blocks.get(i);
Size2D size = block.arrange(g2, RectangleConstraint.NONE);
if (y + size.height <= height) {
itemsInColumn.add(block);
block.setBounds(
new Rectangle2D.Double(x, y, size.width, size.height)
);
y = y + size.height + this.verticalGap;
maxWidth = Math.max(maxWidth, size.width);
}
else {
if (itemsInColumn.isEmpty()) {
// place in this column (truncated) anyway
block.setBounds(
new Rectangle2D.Double(
x, y, size.width, Math.min(size.height, height - y)
)
);
y = 0.0;
x = x + size.width + this.horizontalGap;
}
else {
// start new column
itemsInColumn.clear();
x = x + maxWidth + this.horizontalGap;
y = 0.0;
maxWidth = size.width;
block.setBounds(
new Rectangle2D.Double(
x, y, size.width, Math.min(size.height, height)
)
);
y = size.height + this.verticalGap;
itemsInColumn.add(block);
}
}
}
return new Size2D(x + maxWidth, constraint.getHeight());
}
/**
* Arranges a container with range constraints for both the horizontal
* and vertical.
*
* @param container the container.
* @param g2 the graphics device.
* @param constraint the constraint.
*
* @return The size of the container.
*/
protected Size2D arrangeRR(BlockContainer container, Graphics2D g2,
RectangleConstraint constraint) {
// first arrange without constraints, and see if this fits within
// the required ranges...
Size2D s1 = arrangeNN(container, g2);
if (constraint.getHeightRange().contains(s1.height)) {
return s1; // TODO: we didn't check the width yet
}
else {
RectangleConstraint c = constraint.toFixedHeight(
constraint.getHeightRange().getUpperBound()
);
return arrangeRF(container, g2, c);
}
}
/**
* Arranges the blocks in the container using a fixed height and a
* range for the width.
*
* @param container the container.
* @param g2 the graphics device.
* @param constraint the constraint.
*
* @return The size of the container after arrangement.
*/
protected Size2D arrangeRF(BlockContainer container, Graphics2D g2,
RectangleConstraint constraint) {
Size2D s = arrangeNF(container, g2, constraint);
if (constraint.getWidthRange().contains(s.width)) {
return s;
}
else {
RectangleConstraint c = constraint.toFixedWidth(
constraint.getWidthRange().constrain(s.getWidth())
);
return arrangeFF(container, g2, c);
}
}
/**
* Arranges the blocks without any constraints. This puts all blocks
* into a single column.
*
* @param container the container.
* @param g2 the graphics device.
*
* @return The size after the arrangement.
*/
protected Size2D arrangeNN(BlockContainer container, Graphics2D g2) {
double y = 0.0;
double height = 0.0;
double maxWidth = 0.0;
List blocks = container.getBlocks();
int blockCount = blocks.size();
if (blockCount > 0) {
Size2D[] sizes = new Size2D[blocks.size()];
for (int i = 0; i < blocks.size(); i++) {
Block block = (Block) blocks.get(i);
sizes[i] = block.arrange(g2, RectangleConstraint.NONE);
height = height + sizes[i].getHeight();
maxWidth = Math.max(sizes[i].width, maxWidth);
block.setBounds(
new Rectangle2D.Double(
0.0, y, sizes[i].width, sizes[i].height
)
);
y = y + sizes[i].height + this.verticalGap;
}
if (blockCount > 1) {
height = height + this.verticalGap * (blockCount - 1);
}
if (this.horizontalAlignment != HorizontalAlignment.LEFT) {
for (int i = 0; i < blocks.size(); i++) {
//Block b = (Block) blocks.get(i);
if (this.horizontalAlignment
== HorizontalAlignment.CENTER) {
//TODO: shift block right by half
}
else if (this.horizontalAlignment
== HorizontalAlignment.RIGHT) {
//TODO: shift block over to right
}
}
}
}
return new Size2D(maxWidth, height);
}
/**
* Clears any cached information.
*/
public void clear() {
// no action required.
}
/**
* Tests this instance for equality with an arbitrary object.
*
* @param obj the object (null permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof ColumnArrangement)) {
return false;
}
ColumnArrangement that = (ColumnArrangement) obj;
if (this.horizontalAlignment != that.horizontalAlignment) {
return false;
}
if (this.verticalAlignment != that.verticalAlignment) {
return false;
}
if (this.horizontalGap != that.horizontalGap) {
return false;
}
if (this.verticalGap != that.verticalGap) {
return false;
}
return true;
}
}