285 lines
8.2 KiB
Java
285 lines
8.2 KiB
Java
/* Box.java --
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Copyright (C) 2002, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing;
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import java.awt.AWTError;
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import java.awt.Component;
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import java.awt.Dimension;
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import java.awt.LayoutManager;
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import javax.accessibility.Accessible;
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import javax.accessibility.AccessibleContext;
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import javax.accessibility.AccessibleRole;
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/**
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* A component that uses a {@link BoxLayout} as Layout Manager.
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*
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* In addition to that, this class provides a set of static methods for
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* creating some filler components ('struts' and 'glue') for use in
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* containers that are laid out using BoxLayout.
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*
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* @author Ronald Veldema (rveldema@cs.vu.nl)
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*/
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public class Box extends JComponent implements Accessible
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{
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private static final long serialVersionUID = 1525417495883046342L;
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// FIXME: disable to make libjava compile; visibility rules are broken
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protected class AccessibleBox // extends Container.AccessibleAWTContainer
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{
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private static final long serialVersionUID = -7775079816389931944L;
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protected AccessibleBox()
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{
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}
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public AccessibleRole getAccessibleRole()
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{
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return null;
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}
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}
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/**
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* A component that servers as a filler in BoxLayout controlled containers.
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*/
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public static class Filler extends JComponent implements Accessible
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{
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private static final long serialVersionUID = -1204263191910183998L;
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// FIXME: disable to make libjava compile; visibility rules are broken
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protected class AccessibleBoxFiller // extends Component.AccessibleAWTComponent
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{
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private static final long serialVersionUID = 164963348357479321L;
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protected AccessibleBoxFiller()
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{
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}
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public AccessibleRole getAccessibleRole()
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{
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return null;
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}
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}
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protected AccessibleContext accessibleContext;
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private transient Dimension min, pref, max;
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/**
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* Creates a new instance of Filler.
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*
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* @param min the minimum size of the filler.
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* @param pref the preferred size of the filler.
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* @param max the maximum size of the filler.
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*/
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public Filler(Dimension min, Dimension pref, Dimension max)
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{
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changeShape(min, pref, max);
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}
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/**
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* Changes the dimensions of this Filler.
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*
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* @param min the new minimum size of the filler.
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* @param pref the new preferred size of the filler.
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* @param max the new maximum size of the filler.
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*/
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public void changeShape(Dimension min, Dimension pref, Dimension max)
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{
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this.min = min;
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this.pref = pref;
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this.max = max;
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}
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public AccessibleContext getAccessibleContext()
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{
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// FIXME: disable to make libjava compile; visibility rules are broken
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// if (accessibleContext == null)
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// accessibleContext = new AccessibleBoxFiller();
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return accessibleContext;
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}
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/**
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* Returns the maximum size of this Filler.
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*
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* @return the maximum size of this Filler.
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*/
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public Dimension getMaximumSize()
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{
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return max;
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}
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/**
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* Returns the minimum size of this Filler.
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*
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* @return the minimum size of this Filler.
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*/
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public Dimension getMinimumSize()
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{
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return min;
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}
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/**
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* Returns the preferred size of this Filler.
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*
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* @return the preferred size of this Filler.
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*/
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public Dimension getPreferredSize()
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{
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return pref;
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}
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}
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/**
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* Creates a new Box component, that lays out its children according
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* to the <code>axis</code> parameter.
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*
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* @param axis the orientation of the BoxLayout.
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*
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* @see BoxLayout#X_AXIS
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* @see BoxLayout#Y_AXIS
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* @see BoxLayout#LINE_AXIS
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* @see BoxLayout#PAGE_AXIS
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*/
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public Box(int axis)
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{
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super.setLayout(new BoxLayout(this, axis));
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}
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/**
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* Creates a filler component which acts as glue between components.
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* It does not take space unless some extra space is available. If extra
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* space is available, this component can expand in both X and Y directions.
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*
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* @return a glue-like filler component.
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*/
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public static Component createGlue()
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{
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Filler glue = new Filler(new Dimension(0,0), new Dimension(0,0),
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new Dimension(Integer.MAX_VALUE,Integer.MAX_VALUE)
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);
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return glue;
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}
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public static Box createHorizontalBox()
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{
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return new Box(BoxLayout.X_AXIS);
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}
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/**
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* Creates a filler component which acts as glue between components.
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* It does not take space unless some extra space is available. If extra
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* space is available, this component can expand in the X direction.
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*
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* @return a glue-like filler component.
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*/
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public static Component createHorizontalGlue()
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{
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return createGlue();
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}
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/**
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* Creates a filler component which acts as strut between components.
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* It will fill exactly the specified horizontal size.
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*
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* @param width the width of this strut in pixels.
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*
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* @return a strut-like filler component.
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*/
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public static Component createHorizontalStrut(int width)
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{
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Filler strut = new Filler(new Dimension(width, 0),
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new Dimension(width, 0),
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new Dimension(width, Integer.MAX_VALUE));
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return strut;
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}
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public static Component createRigidArea(Dimension d)
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{
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return new Filler(d, d, d);
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}
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public static Box createVerticalBox()
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{
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return new Box(BoxLayout.Y_AXIS);
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}
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/**
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* Creates a filler component which acts as glue between components.
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* It does not take space unless some extra space is available. If extra
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* space is available, this component can expand in the Y direction.
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*
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* @return a glue-like filler component.
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*/
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public static Component createVerticalGlue()
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{
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return createGlue();
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}
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/**
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* Creates a filler component which acts as strut between components.
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* It will fill exactly the specified vertical size.
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*
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* @param height the height of this strut in pixels.
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*
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* @return a strut-like filler component.
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*/
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public static Component createVerticalStrut(int height)
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{
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Filler strut = new Filler(new Dimension(0, height),
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new Dimension(0, height),
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new Dimension(Integer.MAX_VALUE, height));
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return strut;
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}
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public void setLayout(LayoutManager l)
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{
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throw new AWTError("Not allowed to set layout managers for boxes.");
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}
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public AccessibleContext getAccessibleContext()
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{
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// if (accessibleContext == null)
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// accessibleContext = new AccessibleBox();
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return accessibleContext;
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}
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}
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