--- /dev/null
+/* Panel.java -- Simple container object
+ Copyright (C) 1999, 2002, 2004, 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;
+
+import javax.accessibility.Accessible;
+import javax.accessibility.AccessibleContext;
+import javax.accessibility.AccessibleRole;
+
+/**
+ * A panel is a simple container class. It's default layout is the
+ * <code>FlowLayout</code> manager.
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @author Eric Blake (ebb9@email.byu.edu)
+ * @see FlowLayout
+ * @since 1.0
+ * @status updated to 1.4
+ */
+public class Panel extends Container implements Accessible
+{
+ /**
+ * Compatible with JDK 1.0+.
+ */
+ private static final long serialVersionUID = -2728009084054400034L;
+
+ /** The cached accessible context. */
+ private transient AccessibleContext context;
+
+ /** Flag set when the first system-requested paint event is
+ dispatched. */
+ private transient boolean initialSystemUpdateDone;
+
+ /** Flag set when the first application-requested paint event is
+ consumed. */
+ private transient boolean initialUpdateConsumed;
+
+ /*
+ * The number used to generate the name returned by getName.
+ */
+ private static transient long next_panel_number;
+
+ /**
+ * Initializes a new instance of <code>Panel</code> that has a default
+ * layout manager of <code>FlowLayout</code>.
+ */
+ public Panel()
+ {
+ this(new FlowLayout());
+ }
+
+ /**
+ * Initializes a new instance of <code>Panel</code> with the specified
+ * layout manager.
+ *
+ * @param layoutManager the layout manager for this object
+ * @since 1.1
+ */
+ public Panel(LayoutManager layoutManager)
+ {
+ setLayout(layoutManager);
+ }
+
+ /**
+ * Notifies this object to create its native peer.
+ *
+ * @see #isDisplayable()
+ * @see #removeNotify()
+ */
+ public void addNotify()
+ {
+ if (peer == null)
+ peer = getToolkit().createPanel(this);
+ super.addNotify();
+ }
+
+ /**
+ * Gets the AccessibleContext associated with this panel, creating one if
+ * necessary. This always returns an instance of {@link AccessibleAWTPanel}.
+ *
+ * @return the accessibility context of this panel
+ * @since 1.3
+ */
+ public AccessibleContext getAccessibleContext()
+ {
+ if (context == null)
+ context = new AccessibleAWTPanel();
+ return context;
+ }
+
+ /**
+ * This class provides accessibility support for Panels, and is the
+ * runtime type returned by {@link #getAccessibleContext()}.
+ *
+ * @author Eric Blake (ebb9@email.byu.edu)
+ * @since 1.3
+ */
+ protected class AccessibleAWTPanel extends AccessibleAWTContainer
+ {
+ /**
+ * Compatible with JDK 1.4+.
+ */
+ private static final long serialVersionUID = -6409552226660031050L;
+
+ /**
+ * The default constructor.
+ */
+ protected AccessibleAWTPanel()
+ {
+ }
+
+ /**
+ * Get the role of this accessible object, a panel.
+ *
+ * @return the role of the object
+ * @see AccessibleRole#PANEL
+ */
+ public AccessibleRole getAccessibleRole()
+ {
+ return AccessibleRole.PANEL;
+ }
+ }
+
+ /**
+ * Generate a unique name for this panel.
+ *
+ * @return A unique name for this panel.
+ */
+ String generateName ()
+ {
+ return "panel" + getUniqueLong ();
+ }
+
+ private static synchronized long getUniqueLong ()
+ {
+ return next_panel_number++;
+ }
+}
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