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-rw-r--r--libjava/javax/swing/ButtonGroup.java179
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diff --git a/libjava/javax/swing/ButtonGroup.java b/libjava/javax/swing/ButtonGroup.java
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-/* ButtonGroup.java --
- Copyright (C) 2002 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 javax.swing;
-
-import java.io.Serializable;
-import java.util.Enumeration;
-import java.util.Vector;
-
-
-/**
- * DOCUMENT ME!
- */
-public class ButtonGroup implements Serializable
-{
- /** DOCUMENT ME! */
- private static final long serialVersionUID = 4259076101881721375L;
-
- /** The buttons added to this button group. */
- protected Vector buttons = new Vector();
-
- /** The currently selected button model. */
- ButtonModel sel;
-
- /**
- * Creates a new button group.
- */
- public ButtonGroup()
- {
- }
-
- /**
- * Adds a button to this group.
- *
- * @param b the button to add
- */
- public void add(AbstractButton b)
- {
- b.getModel().setGroup(this);
- buttons.addElement(b);
- }
-
- /**
- * Removed a given button from this group.
- *
- * @param b the button to remove
- */
- public void remove(AbstractButton b)
- {
- b.getModel().setGroup(null);
- buttons.removeElement(b);
- }
-
- /**
- * Returns the currently added buttons.
- *
- * @return <code>Enumeration</code> over all added buttons
- */
- public Enumeration getElements()
- {
- return buttons.elements();
- }
-
- /**
- * Returns the currently selected button model.
- *
- * @return the currently selected button model, null if none was selected
- * yet
- */
- public ButtonModel getSelection()
- {
- return sel;
- }
-
- /**
- * DOCUMENT ME!
- *
- * @param m DOCUMENT ME!
- *
- * @return DOCUMENT ME!
- */
- AbstractButton FindButton(ButtonModel m)
- {
- for (int i = 0; i < buttons.size(); i++)
- {
- AbstractButton a = (AbstractButton) buttons.get(i);
- if (a.getModel() == m)
- return a;
- }
- return null;
- }
-
- /**
- * Sets the currently selected button model. Only one button of a group can
- * be selected at a time.
- *
- * @param m the model to select
- * @param b true if this button is to be selected, false otherwise
- */
- public void setSelected(ButtonModel m, boolean b)
- {
- if ((sel != m || b) && (! b || sel == m))
- return;
-
- if (b && sel != m)
- {
- ButtonModel old = sel;
- sel = m;
-
- if (old != null)
- old.setSelected(false);
- AbstractButton button = FindButton(old);
- if (button != null)
- button.repaint();
- }
- else if (! b && sel == m)
- m.setSelected(true);
- }
-
- /**
- * Checks if the given <code>ButtonModel</code> is selected in this button
- * group.
- *
- * @param m DOCUMENT ME!
- *
- * @return true of given <code>ButtonModel</code> is selected, false
- * otherwise
- */
- public boolean isSelected(ButtonModel m)
- {
- return m == sel;
- }
-
- /**
- * Return the number of buttons in this button group.
- *
- * @return the number of buttons
- *
- * @since 1.3
- */
- public int getButtonCount()
- {
- return buttons.size();
- }
-}