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A simple layoutmanager to overlay all components of a parent.
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/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.]
*
* ------------------------------
* OverlayLayout.java
* ------------------------------
* (C)opyright 2003, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): -;
*
* $Id: OverlayLayout.java,v 1.5 2005/10/18 13:18:34 mungady Exp $
*
* Changes
* -------------------------
* 09-12-2003 : Initial version
*
*/
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.awt.Rectangle;
/**
* A simple layoutmanager to overlay all components of a parent.
* <p/>
* This layout manager acts similiar to the card layout, but all
* childs of the parent band have the same size and all childs can
* be visible at the same time.
*
* @author Thomas Morgner
*/
public final class OverlayLayout implements LayoutManager {
/**
* A flag that defines, whether invisible components should be ignored when
* computing the layout.
*/
private boolean ignoreInvisible;
/**
* Creates a new instance.
*
* @param ignoreInvisible whether to ignore invisible components when computing the layout.
*/
public OverlayLayout(final boolean ignoreInvisible) {
this.ignoreInvisible = ignoreInvisible;
}
/**
* DefaultConstructor.
*/
public OverlayLayout() {
}
/**
* If the layout manager uses a per-component string,
* adds the component <code>comp</code> to the layout,
* associating it
* with the string specified by <code>name</code>.
*
* @param name the string to be associated with the component
* @param comp the component to be added
*/
public void addLayoutComponent(final String name, final Component comp) {
}
/**
* Removes the specified component from the layout.
*
* @param comp the component to be removed
*/
public void removeLayoutComponent(final Component comp) {
}
/**
* Lays out the specified container.
*
* @param parent the container to be laid out
*/
public void layoutContainer(final Container parent) {
synchronized (parent.getTreeLock()) {
final Insets ins = parent.getInsets();
final Rectangle bounds = parent.getBounds();
final int width = bounds.width - ins.left - ins.right;
final int height = bounds.height - ins.top - ins.bottom;
final Component[] comps = parent.getComponents();
for (int i = 0; i < comps.length; i++) {
final Component c = comps[i];
if ((comps[i].isVisible() == false) && this.ignoreInvisible) {
continue;
}
c.setBounds(ins.left, ins.top, width, height);
}
}
}
/**
* Calculates the minimum size dimensions for the specified
* container, given the components it contains.
*
* @param parent the component to be laid out
* @return the minimum size computed for the parent.
* @see #preferredLayoutSize
*/
public Dimension minimumLayoutSize(final Container parent) {
synchronized (parent.getTreeLock()) {
final Insets ins = parent.getInsets();
final Component[] comps = parent.getComponents();
int height = 0;
int width = 0;
for (int i = 0; i < comps.length; i++) {
if ((comps[i].isVisible() == false) && this.ignoreInvisible) {
continue;
}
final Dimension pref = comps[i].getMinimumSize();
if (pref.height > height) {
height = pref.height;
}
if (pref.width > width) {
width = pref.width;
}
}
return new Dimension(width + ins.left + ins.right,
height + ins.top + ins.bottom);
}
}
/**
* Calculates the preferred size dimensions for the specified
* container, given the components it contains.
*
* @param parent the container to be laid out
* @return the preferred size computed for the parent.
* @see #minimumLayoutSize
*/
public Dimension preferredLayoutSize(final Container parent) {
synchronized (parent.getTreeLock()) {
final Insets ins = parent.getInsets();
final Component[] comps = parent.getComponents();
int height = 0;
int width = 0;
for (int i = 0; i < comps.length; i++) {
if ((comps[i].isVisible() == false) && this.ignoreInvisible) {
continue;
}
final Dimension pref = comps[i].getPreferredSize();
if (pref.height > height) {
height = pref.height;
}
if (pref.width > width) {
width = pref.width;
}
}
return new Dimension(width + ins.left + ins.right,
height + ins.top + ins.bottom);
}
}
}
