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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2000 Intersect Software Corporation
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, see http://www.gnu.org
*/
package net.wotonomy.ui.swing.components;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Rectangle;
import javax.swing.JPanel;
import javax.swing.JRootPane;
/**
* A custom layout for a JRootPane that handles the the layout of a JRootPane's
* layeredPane, glassPane, and menuBar, and in addition handles four decorative
* components arranged in a border layout. Add the decorative components to the
* JRootPane using the directional constants; CENTER is reserved for the content
* pane and menu bar.
*
* @author michael@mpowers.net
* @version $Revision: 904 $
*/
public class BetterRootLayout extends BorderLayout {
/**
* Returns the amount of space the layout would like to have.
*
* @param the Container for which this layout manager is being used
* @return a Dimension object containing the layout's preferred size
* @throws ClassCastException if parent is not a JRootPane
*/
public Dimension preferredLayoutSize(Container parent) {
JRootPane rootPane = (JRootPane) parent;
JPanel proxyPanel = new JPanel();
proxyPanel.setLayout(new BorderLayout());
JPanel contentProxy = null;
if (rootPane.getContentPane() != null) {
contentProxy = new JPanel();
contentProxy.setMinimumSize(rootPane.getContentPane().getMinimumSize());
contentProxy.setMaximumSize(rootPane.getContentPane().getMaximumSize());
contentProxy.setPreferredSize(rootPane.getContentPane().getPreferredSize());
proxyPanel.add(contentProxy, CENTER);
}
JPanel menuProxy = null;
if (rootPane.getJMenuBar() != null) {
menuProxy = new JPanel();
menuProxy.setMinimumSize(rootPane.getJMenuBar().getMinimumSize());
menuProxy.setMaximumSize(rootPane.getJMenuBar().getMaximumSize());
menuProxy.setPreferredSize(rootPane.getJMenuBar().getPreferredSize());
proxyPanel.add(menuProxy, NORTH);
}
this.addLayoutComponent(proxyPanel, CENTER);
Dimension result = super.preferredLayoutSize(parent);
this.removeLayoutComponent(proxyPanel);
proxyPanel.removeAll();
return result;
}
/**
* Returns the minimum amount of space the layout needs.
*
* @param the Container for which this layout manager is being used
* @return a Dimension object containing the layout's minimum size
* @throws ClassCastException if parent is not a JRootPane
*/
public Dimension minimumLayoutSize(Container parent) {
JRootPane rootPane = (JRootPane) parent;
JPanel proxyPanel = new JPanel();
proxyPanel.setLayout(new BorderLayout());
JPanel contentProxy = null;
if (rootPane.getContentPane() != null) {
contentProxy = new JPanel();
contentProxy.setMinimumSize(rootPane.getContentPane().getMinimumSize());
contentProxy.setMaximumSize(rootPane.getContentPane().getMaximumSize());
contentProxy.setPreferredSize(rootPane.getContentPane().getPreferredSize());
proxyPanel.add(contentProxy, CENTER);
}
JPanel menuProxy = null;
if (rootPane.getJMenuBar() != null) {
menuProxy = new JPanel();
menuProxy.setMinimumSize(rootPane.getJMenuBar().getMinimumSize());
menuProxy.setMaximumSize(rootPane.getJMenuBar().getMaximumSize());
menuProxy.setPreferredSize(rootPane.getJMenuBar().getPreferredSize());
proxyPanel.add(menuProxy, NORTH);
}
this.addLayoutComponent(proxyPanel, CENTER);
Dimension result = super.minimumLayoutSize(parent);
this.removeLayoutComponent(proxyPanel);
proxyPanel.removeAll();
return result;
}
/**
* Returns the maximum amount of space the layout can use.
*
* @param the Container for which this layout manager is being used
* @return a Dimension object containing the layout's maximum size
* @throws ClassCastException if parent is not a JRootPane
*/
public Dimension maximumLayoutSize(Container target) {
JRootPane rootPane = (JRootPane) target;
JPanel proxyPanel = new JPanel();
proxyPanel.setLayout(new BorderLayout());
JPanel contentProxy = null;
if (rootPane.getContentPane() != null) {
contentProxy = new JPanel();
contentProxy.setMinimumSize(rootPane.getContentPane().getMinimumSize());
contentProxy.setMaximumSize(rootPane.getContentPane().getMaximumSize());
contentProxy.setPreferredSize(rootPane.getContentPane().getPreferredSize());
proxyPanel.add(contentProxy, CENTER);
}
JPanel menuProxy = null;
if (rootPane.getJMenuBar() != null) {
menuProxy = new JPanel();
menuProxy.setMinimumSize(rootPane.getJMenuBar().getMinimumSize());
menuProxy.setMaximumSize(rootPane.getJMenuBar().getMaximumSize());
menuProxy.setPreferredSize(rootPane.getJMenuBar().getPreferredSize());
proxyPanel.add(menuProxy, NORTH);
}
this.addLayoutComponent(proxyPanel, CENTER);
Dimension result = super.maximumLayoutSize(target);
this.removeLayoutComponent(proxyPanel);
proxyPanel.removeAll();
return result;
}
/**
* Instructs the layout manager to perform the layout for the specified
* container.
*
* @param the Container for which this layout manager is being used
* @throws ClassCastException if parent is not a JRootPane
*/
public void layoutContainer(Container parent) {
JRootPane rootPane = (JRootPane) parent;
Rectangle b = parent.getBounds();
Insets i = rootPane.getInsets();
int w = b.width - i.right - i.left;
int h = b.height - i.top - i.bottom;
// layout panes
if (rootPane.getLayeredPane() != null) {
rootPane.getLayeredPane().setBounds(i.left, i.top, w, h);
}
if (rootPane.getGlassPane() != null) {
rootPane.getGlassPane().setBounds(i.left, i.top, w, h);
}
// handle proxy panel
JPanel proxyPanel = new JPanel();
proxyPanel.setLayout(new BorderLayout());
this.addLayoutComponent(proxyPanel, CENTER);
super.layoutContainer(parent);
// use proxy sizes to set sizes of layeredPane's children
Rectangle proxyRect = proxyPanel.getBounds();
if (rootPane.getJMenuBar() != null) {
Rectangle menuRect = proxyPanel.getBounds();
menuRect.height = rootPane.getJMenuBar().getPreferredSize().height;
rootPane.getJMenuBar().setBounds(menuRect);
proxyRect.y += menuRect.height;
proxyRect.height -= menuRect.height;
}
if (rootPane.getContentPane() != null) {
rootPane.getContentPane().setBounds(proxyRect);
}
this.removeLayoutComponent(proxyPanel);
proxyPanel.removeAll();
}
/**
* Passes NORTH, SOUTH, EAST, WEST and CENTER to super implementation, and
* ignores all others.
*/
public void addLayoutComponent(Component comp, Object constraints) {
if (NORTH.equals(constraints)) {
super.addLayoutComponent(comp, constraints);
} else if (SOUTH.equals(constraints)) {
super.addLayoutComponent(comp, constraints);
} else if (EAST.equals(constraints)) {
super.addLayoutComponent(comp, constraints);
} else if (WEST.equals(constraints)) {
super.addLayoutComponent(comp, constraints);
} else if (CENTER.equals(constraints)) {
super.addLayoutComponent(comp, constraints);
}
// otherwise, ignore
}
}
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