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/* Canvas.java -- An AWT canvas widget
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the non-peer AWT libraries of GNU Classpath.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation, either version 2 of the License, or
(at your option) any later verion.
This library 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; if not, write to the Free Software Foundation
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA. */
package java.awt;
import java.awt.peer.CanvasPeer;
import java.awt.peer.ComponentPeer;
/**
* This class implements an AWT canvas widget.
*
* @author Aaron M. Renn (arenn@urbanophile.com)
*/
public class Canvas extends Component implements java.io.Serializable
{
/*
* Static Variables
*/
// Serialization constant
private static final long serialVersionUID = -2284879212465893870L;
/*************************************************************************/
/*
* Constructors
*/
/**
* Initializes a new instance of <code>Canvas</code>.
*/
public
Canvas()
{
}
/*************************************************************************/
/*
* Instance Methods
*/
/**
* Creates the native peer for this object.
*/
public void
addNotify()
{
if (getPeer() != null)
return;
setPeer((ComponentPeer)getToolkit().createCanvas(this));
}
/*************************************************************************/
/**
* Repaints the canvas window. This method should be overriden by
* a subclass to do something useful, as this method simply paints
* the window with the background color.
*/
public void
paint(Graphics graphics)
{
Dimension dim = getSize();
graphics.setColor(getBackground());
graphics.fillRect(0, 0, dim.width, dim.height);
}
} // class Canvas
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