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DividerLayout is layout that divides two components with the column of actions
/*
* $Id: DividerLayout.java,v 1.1.1.1 2005/04/07 18:36:20 pocho Exp $
*/
// Revised from javautils 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;
/**
* <p>
* <code>DividerLayout</code> is layout that divides two components with the
* column of actions. It is especially usefull for components that contains
* two lists of elements and buttons for transfering elements between these
* two lists.
* </p>
* <p>
* Components are indicated as {@link #WEST}, {@link #EAST} and {@link #CENTER}.
* </p>
*
* @version $Name: $ - $Revision: 1.1.1.1 $ - $Date: 2005/04/07 18:36:20 $
* TODO Test
*/
public class DividerLayout implements LayoutManager2 {
/**
* Indicates west component
*/
public final static String WEST = "WEST";
/**
* indicates east component
*/
public final static String EAST = "EAST";
/**
* indicates center component
*/
public final static String CENTER = "CENTER";
/**
* west component
*/
protected Component westComponent;
/**
* center component
*/
protected Component centerComponent;
/**
* east component
*/
protected Component eastComponent;
/**
* Adds a component to specified position.
*/
public void addLayoutComponent(Component comp, Object constraints) {
if (WEST.equalsIgnoreCase((String) constraints)) {
westComponent = comp;
}
else if (CENTER.equalsIgnoreCase((String) constraints)) {
centerComponent = comp;
}
else if (EAST.equalsIgnoreCase((String) constraints)) {
eastComponent = comp;
}
}
/**
* @see java.awt.LayoutManager2#maximumLayoutSize(java.awt.Container)
*/
public Dimension maximumLayoutSize(Container target) {
Dimension size;
int width = 0;
int height = 0;
if ((westComponent != null) && (westComponent.isVisible())) {
size = westComponent.getMaximumSize();
width = Math.max(width, size.width);
height = Math.max(height, size.height);
}
if ((eastComponent != null) && (eastComponent.isVisible())) {
size = eastComponent.getMaximumSize();
width = Math.max(width, size.width);
height = Math.max(height, size.height);
}
width *= 2;
if ((centerComponent != null) && (centerComponent.isVisible())) {
size = centerComponent.getPreferredSize();
width += size.width;
height = Math.max(height, size.height);
}
return new Dimension(width, height);
}
/**
* @see java.awt.LayoutManager2#getLayoutAlignmentX(java.awt.Container)
*/
public float getLayoutAlignmentX(Container target) {
return 0.0f;
}
/**
* @see java.awt.LayoutManager2#getLayoutAlignmentY(java.awt.Container)
*/
public float getLayoutAlignmentY(Container target) {
return 0.0f;
}
/**
* @see java.awt.LayoutManager2#invalidateLayout(java.awt.Container)
*/
public void invalidateLayout(Container target) {}
/**
* @see java.awt.LayoutManager#addLayoutComponent(java.lang.String, java.awt.Component)
*/
public void addLayoutComponent(String name, Component comp) {
addLayoutComponent(comp, name);
}
/**
* @see java.awt.LayoutManager#removeLayoutComponent(java.awt.Component)
*/
public void removeLayoutComponent(Component comp) {
if (comp == westComponent) {
westComponent = null;
}
else if (comp == centerComponent) {
centerComponent = null;
}
else if (comp == eastComponent) {
centerComponent = null;
}
}
/**
* @see java.awt.LayoutManager#preferredLayoutSize(java.awt.Container)
*/
public Dimension preferredLayoutSize(Container parent) {
Dimension size;
int width = 0;
int height = 0;
if ((westComponent != null) && (westComponent.isVisible())) {
size = westComponent.getPreferredSize();
width = Math.max(width, size.width);
height = Math.max(height, size.height);
}
if ((eastComponent != null) && (eastComponent.isVisible())) {
size = eastComponent.getPreferredSize();
width = Math.max(width, size.width);
height = Math.max(height, size.height);
}
width *= 2;
if ((centerComponent != null) && (centerComponent.isVisible())) {
size = centerComponent.getPreferredSize();
width += size.width;
height = Math.max(height, size.height);
}
return new Dimension(width, height);
}
/**
* @see java.awt.LayoutManager#minimumLayoutSize(java.awt.Container)
*/
public Dimension minimumLayoutSize(Container parent) {
Dimension size;
int width = 0;
int height = 0;
if ((westComponent != null) && (westComponent.isVisible())) {
size = westComponent.getMinimumSize();
width = Math.max(width, size.width);
height = Math.max(height, size.height);
}
if ((eastComponent != null) && (eastComponent.isVisible())) {
size = eastComponent.getMinimumSize();
width = Math.max(width, size.width);
height = Math.max(height, size.height);
}
width *= 2;
if ((centerComponent != null) && (centerComponent.isVisible())) {
size = centerComponent.getPreferredSize();
width += size.width;
height += Math.max(height, size.height);
}
return new Dimension(width, height);
}
/**
* @see java.awt.LayoutManager#layoutContainer(java.awt.Container)
*/
public void layoutContainer(Container container) {
Insets insets = container.getInsets();
Dimension westSize = new Dimension(0, 0);
Dimension centerSize = new Dimension(0, 0);
Dimension eastSize = new Dimension(0, 0);
Rectangle centerBounds = new Rectangle(0, 0, 0, 0);
Dimension containerSize = container.getSize();
int centerX = containerSize.width / 2;
int centerY = containerSize.height / 2;
if ((centerComponent != null) &&
(centerComponent.isVisible())) {
centerSize = centerComponent.getPreferredSize();
centerSize.width = Math.min(centerSize.width,
containerSize.width - insets.left -
insets.right);
centerSize.height = Math.min(centerSize.height,
containerSize.height - insets.top -
insets.bottom);
centerComponent.setBounds(centerX -
(centerSize.width / 2),
centerY - (centerSize.height / 2),
centerSize.width, centerSize.height);
centerBounds = centerComponent.getBounds();
}
if ((westComponent != null) && (westComponent.isVisible())) {
westSize = westComponent.getPreferredSize();
}
if ((eastComponent != null) && (eastComponent.isVisible())) {
eastSize = eastComponent.getPreferredSize();
}
/* int maxWidth = Math.min(westSize.width, eastSize.width);
maxWidth = Math.min(maxWidth, (containerSize.width -
centerBounds.width - insets.left -
insets.right) / 2);*/
int maxWidth = (containerSize.width -
centerBounds.width - insets.left -
insets.right) / 2;
/* int maxHeight = Math.min(westSize.height, eastSize.height);
maxHeight = Math.max(maxHeight, containerSize.height -
insets.top - insets.bottom);*/
int maxHeight=containerSize.height - insets.top - insets.bottom;
if (westComponent != null) {
westComponent.setBounds(centerBounds.x - maxWidth,
centerY - (maxHeight / 2),
maxWidth, maxHeight);
}
if (eastComponent != null) {
eastComponent.setBounds(centerBounds.x +
centerBounds.width,
centerY - (maxHeight / 2),
maxWidth, maxHeight);
}
}
}
