Initial revision

From-SVN: r102074

libjava/classpath/java/awt/CheckboxGroup.java

@@ -0,0 +1,173 @@
+/* CheckboxGroup.java -- A grouping class for checkboxes.
+   Copyright (C) 1999, 2000, 2002, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.awt;
+
+/**
+  * This class if for combining checkboxes into groups so that only
+  * one checkbox in the group can be selected at any one time.
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  * @author Tom Tromey (tromey@redhat.com)
+  */
+public class CheckboxGroup implements java.io.Serializable
+{
+
+/*
+ * Static Variables
+ */
+
+// Serialization constant
+private static final long serialVersionUID = 3729780091441768983L;
+
+/*************************************************************************/
+
+/*
+ * Instance Variables
+ */
+
+/**
+  * @serial The currently selected checkbox.
+  */
+private Checkbox selectedCheckbox;
+
+/*************************************************************************/
+
+/*
+ * Constructors
+ */
+
+/**
+  * Initializes a new instance of <code>CheckboxGroup</code>.
+  */
+public
+CheckboxGroup()
+{
+}
+
+/*************************************************************************/
+
+/*
+ * Instance Methods
+ */
+
+/**
+  * Returns the currently selected checkbox, or <code>null</code> if none
+  * of the checkboxes in this group are selected.
+  *
+  * @return The selected checkbox.
+  */
+public Checkbox
+getSelectedCheckbox()
+{
+  return getCurrent ();
+}
+
+/*************************************************************************/
+
+/**
+  * Returns the currently selected checkbox, or <code>null</code> if none
+  * of the checkboxes in this group are selected.
+  *
+  * @return The selected checkbox.
+  *
+  * @deprecated This method is deprecated in favor of 
+  * <code>getSelectedCheckbox()</code>.
+  */
+public Checkbox
+getCurrent()
+{
+  return(selectedCheckbox);
+} 
+
+/*************************************************************************/
+
+/**
+  * This method sets the specified checkbox to be the selected on in this
+  * group, and unsets all others.
+  *
+  * @param selectedCheckbox The new selected checkbox.
+  */
+public void
+setSelectedCheckbox(Checkbox selectedCheckbox)
+{
+  setCurrent (selectedCheckbox);
+}
+
+/*************************************************************************/
+
+/**
+  * This method sets the specified checkbox to be the selected on in this
+  * group, and unsets all others.
+  *
+  * @param selectedCheckbox The new selected checkbox.
+  *
+  * @deprecated This method is deprecated in favor of
+  * <code>setSelectedCheckbox()</code>.
+  */
+public void
+setCurrent(Checkbox selectedCheckbox)
+{
+  if (this.selectedCheckbox != null)
+    {
+      if (this.selectedCheckbox.getCheckboxGroup() != this)
+        return;
+
+      this.selectedCheckbox.setState(false);
+    }
+
+  this.selectedCheckbox = selectedCheckbox;
+  if (selectedCheckbox != null)
+    selectedCheckbox.setState(true);
+}
+
+/*************************************************************************/
+
+/**
+  * Returns a string representation of this checkbox group.
+  *
+  * @return A string representation of this checkbox group.
+  */
+public String
+toString()
+{
+  return(getClass().getName() + "[selectedCheckbox=" + selectedCheckbox + "]");
+}
+
+} // class CheckboxGroup 
+