X Y Layout
//Revised from enhydra swing
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.LayoutManager2;
import java.awt.Rectangle;
import java.io.Serializable;
import java.util.Hashtable;
public class XYLayout implements LayoutManager2, Serializable {
private static final long serialVersionUID = 200L;
int width;
int height;
Hashtable info;
static final XYConstraints defaultConstraints = new XYConstraints();
public XYLayout() {
info = new Hashtable();
}
public XYLayout(int width, int height) {
info = new Hashtable();
this.width = width;
this.height = height;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
public String toString() {
return String.valueOf(String.valueOf((new StringBuffer("XYLayout[width=")).append(width)
.append(",height=").append(height).append("]")));
}
public void addLayoutComponent(String s, Component component1) {
}
public void removeLayoutComponent(Component component) {
info.remove(component);
}
public Dimension preferredLayoutSize(Container target) {
return getLayoutSize(target, true);
}
public Dimension minimumLayoutSize(Container target) {
return getLayoutSize(target, false);
}
public void layoutContainer(Container target) {
Insets insets = target.getInsets();
int count = target.getComponentCount();
for (int i = 0; i < count; i++) {
Component component = target.getComponent(i);
if (component.isVisible()) {
Rectangle r = getComponentBounds(component, true);
component.setBounds(insets.left + r.x, insets.top + r.y, r.width, r.height);
}
}
}
public void addLayoutComponent(Component component, Object constraints) {
if (constraints instanceof XYConstraints)
info.put(component, constraints);
}
public Dimension maximumLayoutSize(Container target) {
return new Dimension(0x7fffffff, 0x7fffffff);
}
public float getLayoutAlignmentX(Container target) {
return 0.5F;
}
public float getLayoutAlignmentY(Container target) {
return 0.5F;
}
public void invalidateLayout(Container container) {
}
Rectangle getComponentBounds(Component component, boolean doPreferred) {
XYConstraints constraints = (XYConstraints) info.get(component);
if (constraints == null)
constraints = defaultConstraints;
Rectangle r = new Rectangle(constraints.x, constraints.y, constraints.width, constraints.height);
if (r.width <= 0 || r.height <= 0) {
Dimension d = doPreferred ? component.getPreferredSize() : component.getMinimumSize();
if (r.width <= 0)
r.width = d.width;
if (r.height <= 0)
r.height = d.height;
}
return r;
}
Dimension getLayoutSize(Container target, boolean doPreferred) {
Dimension dim = new Dimension(0, 0);
if (width <= 0 || height <= 0) {
int count = target.getComponentCount();
for (int i = 0; i < count; i++) {
Component component = target.getComponent(i);
if (component.isVisible()) {
Rectangle r = getComponentBounds(component, doPreferred);
dim.width = Math.max(dim.width, r.x + r.width);
dim.height = Math.max(dim.height, r.y + r.height);
}
}
}
if (width > 0)
dim.width = width;
if (height > 0)
dim.height = height;
Insets insets = target.getInsets();
dim.width += insets.left + insets.right;
dim.height += insets.top + insets.bottom;
return dim;
}
}
class XYConstraints implements Cloneable, Serializable {
int x;
int y;
int width;
int height;
public XYConstraints() {
this(0, 0, 0, 0);
}
public XYConstraints(int x, int y, int width, int height) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
}
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
public int hashCode() {
return x ^ y * 37 ^ width * 43 ^ height * 47;
}
public boolean equals(Object that) {
if (that instanceof XYConstraints) {
XYConstraints other = (XYConstraints) that;
return other.x == x && other.y == y && other.width == width && other.height == height;
} else {
return false;
}
}
public Object clone() {
return new XYConstraints(x, y, width, height);
}
public String toString() {
return String.valueOf(String.valueOf((new StringBuffer("XYConstraints[")).append(x).append(",")
.append(y).append(",").append(width).append(",").append(height).append("]")));
}
}
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