Canvas.java (serialVersionUID): New constant.
* java/awt/Canvas.java (serialVersionUID): New constant. Updated copyright. Added javadoc from Classpath. * java/awt/ItemSelectable.java: Replaced with Classpath version. From-SVN: r48934
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Tom Tromey
Tom Tromey
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commit
4cd533411e
@ -1,5 +1,9 @@
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2002-01-16 Tom Tromey <tromey@redhat.com>
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* java/awt/Canvas.java (serialVersionUID): New constant.
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Updated copyright. Added javadoc from Classpath.
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* java/awt/ItemSelectable.java: Replaced with Classpath version.
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* java/awt/CheckboxGroup.java: Merged with Classpath.
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* java/awt/Checkbox.java: Merged with Classpath.
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@ -1,21 +1,42 @@
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/* Copyright (C) 2000 Free Software Foundation
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/* Copyright (C) 1999, 2000, 2002 Free Software Foundation
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This file is part of libgcj.
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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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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.awt;
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import java.awt.peer.ComponentPeer;
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public class Canvas extends Component
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public class Canvas extends Component implements java.io.Serializable
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{
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transient GraphicsConfiguration graphicsConfiguration;
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/**
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* Initializes a new instance of <code>Canvas</code>.
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*/
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public Canvas() { }
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public Canvas(GraphicsConfiguration graphicsConfiguration)
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{
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this.graphicsConfiguration = graphicsConfiguration;
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@ -28,17 +49,21 @@ public class Canvas extends Component
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return super.getGraphicsConfigurationImpl();
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}
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/**
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* Creates the native peer for this object.
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*/
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public void addNotify()
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{
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if (peer == null)
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{
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peer = (ComponentPeer) getToolkit().createCanvas(this);
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}
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peer = (ComponentPeer) getToolkit().createCanvas(this);
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super.addNotify();
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}
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/** Override this to create components with custom painting.
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Defaults to filling the component with the background color. */
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/**
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* Repaints the canvas window. This method should be overriden by
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* a subclass to do something useful, as this method simply paints
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* the window with the background color.
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*/
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public void paint(Graphics gfx)
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{
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/* This implementation doesn't make much sense since the filling
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@ -49,4 +74,7 @@ public class Canvas extends Component
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Dimension size = getSize();
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gfx.fillRect(0, 0, size.width, size.height);
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}
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// Serialization constant
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private static final long serialVersionUID = -2284879212465893870L;
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}
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@ -1,36 +1,73 @@
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/* Copyright (C) 2000 Free Software Foundation
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/* ItemSelectable.java -- Items that can be selected
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Copyright (C) 1999 Free Software Foundation, Inc.
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This file is part of libjava.
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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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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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This software is copyrighted work licensed under the terms of the
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Libjava License. Please consult the file "LIBJAVA_LICENSE" for
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details. */
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package java.awt;
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import java.awt.event.*;
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/** This interface is implemented by components that support the
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* select of items. For instance, Checkbox implements this
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* interface.
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* @author Tom Tromey <tromey@cygnus.com>
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* @date April 8, 2000
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*/
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import java.awt.event.ItemListener;
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/**
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* This interface is for objects that can have one or more items
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* selected. For example, radio buttons.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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*/
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public interface ItemSelectable
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{
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/** This method adds a listener to receive item events fired by the
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* component.
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* @param l The item listener to add.
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*/
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public void addItemListener (ItemListener l);
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/** This method returns the items in this component which are
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* currently selected.
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* @returns A non-null array containing the items.
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*/
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public Object[] getSelectedObjects ();
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/**
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* Returns the list of objects that are selected in this component.
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*
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* @return The list of objects that are selected, or <code>null</code> if
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* no objects are selected.
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*/
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public abstract Object[]
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getSelectedObjects();
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/*************************************************************************/
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/**
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* Adds an item listener to this object. It will receive
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* selection events for this object.
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*
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* @param listener The item listener to add.
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*/
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public abstract void
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addItemListener(ItemListener listener);
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/*************************************************************************/
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/**
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* Removes an item listener from this object. It will no longer receive
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* selection change events.
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*
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* @param listener The item listener to remove.
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*/
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public abstract void
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removeItemListener(ItemListener listener);
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} // interface ItemSelectable
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/** This method removes an item listener.
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* @param l The item listener to remove.
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*/
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public void removeItemListener (ItemListener l);
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}
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