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174 lines
4.7 KiB
Java
174 lines
4.7 KiB
Java
/* CheckboxGroup.java -- A grouping class for checkboxes.
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Copyright (C) 1999, 2000, 2002 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 java.awt;
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/**
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* This class if for combining checkboxes into groups so that only
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* one checkbox in the group can be selected at any one time.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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* @author Tom Tromey <tromey@redhat.com>
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*/
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public class CheckboxGroup implements java.io.Serializable
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{
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/*
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* Static Variables
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*/
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// Serialization constant
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private static final long serialVersionUID = 3729780091441768983L;
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/*************************************************************************/
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/*
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* Instance Variables
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*/
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/**
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* @serial The currently selected checkbox.
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*/
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private Checkbox selectedCheckbox;
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/*************************************************************************/
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/*
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* Constructors
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*/
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/**
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* Initializes a new instance of <code>CheckboxGroup</code>.
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*/
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public
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CheckboxGroup()
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{
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}
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/*************************************************************************/
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/*
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* Instance Methods
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*/
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/**
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* Returns the currently selected checkbox, or <code>null</code> if none
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* of the checkboxes in this group are selected.
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*
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* @return The selected checkbox.
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*/
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public Checkbox
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getSelectedCheckbox()
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{
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return(selectedCheckbox);
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}
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/*************************************************************************/
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/**
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* Returns the currently selected checkbox, or <code>null</code> if none
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* of the checkboxes in this group are selected.
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*
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* @return The selected checkbox.
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*
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* @deprecated This method is deprecated in favor of
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* <code>getSelectedCheckbox()</code>.
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*/
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public Checkbox
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getCurrent()
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{
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return(selectedCheckbox);
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}
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/*************************************************************************/
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/**
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* This method sets the specified checkbox to be the selected on in this
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* group, and unsets all others.
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*
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* @param selectedCheckbox The new selected checkbox.
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*/
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public void
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setSelectedCheckbox(Checkbox selectedCheckbox)
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{
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if (this.selectedCheckbox != null)
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{
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if (this.selectedCheckbox.getCheckboxGroup() != this)
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return;
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this.selectedCheckbox.setState(false);
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}
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this.selectedCheckbox = selectedCheckbox;
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if (selectedCheckbox != null)
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selectedCheckbox.setState(true);
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}
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/*************************************************************************/
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/**
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* This method sets the specified checkbox to be the selected on in this
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* group, and unsets all others.
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*
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* @param selectedCheckbox The new selected checkbox.
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*
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* @deprecated This method is deprecated in favor of
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* <code>setSelectedCheckbox()</code>.
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*/
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public void
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setCurrent(Checkbox selectedCheckbox)
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{
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setSelectedCheckbox(selectedCheckbox);
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}
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/*************************************************************************/
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/**
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* Returns a string representation of this checkbox group.
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*
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* @return A string representation of this checkbox group.
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*/
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public String
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toString()
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{
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return(getClass().getName() + "[selectedCheckbox=" + selectedCheckbox + "]");
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}
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} // class CheckboxGroup
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