92 lines
3.1 KiB
Java
92 lines
3.1 KiB
Java
/* Copyright (C) 1999, 2000, 2002 Free Software Foundation
|
|
|
|
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., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 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 java.awt.peer.ComponentPeer;
|
|
|
|
public class Canvas extends Component implements java.io.Serializable
|
|
{
|
|
transient GraphicsConfiguration graphicsConfiguration;
|
|
|
|
/**
|
|
* Initializes a new instance of <code>Canvas</code>.
|
|
*/
|
|
public Canvas() { }
|
|
|
|
public Canvas(GraphicsConfiguration graphicsConfiguration)
|
|
{
|
|
this.graphicsConfiguration = graphicsConfiguration;
|
|
}
|
|
|
|
GraphicsConfiguration getGraphicsConfigurationImpl()
|
|
{
|
|
if (graphicsConfiguration != null)
|
|
return graphicsConfiguration;
|
|
return super.getGraphicsConfigurationImpl();
|
|
}
|
|
|
|
/**
|
|
* Creates the native peer for this object.
|
|
*/
|
|
public void addNotify()
|
|
{
|
|
if (peer == null)
|
|
peer = (ComponentPeer) getToolkit().createCanvas(this);
|
|
super.addNotify();
|
|
}
|
|
|
|
/**
|
|
* 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 gfx)
|
|
{
|
|
/* This implementation doesn't make much sense since the filling
|
|
of background color is guaranteed for heavyweight components
|
|
such as this. But there's no need to worry, since paint() is
|
|
usually overridden anyway. */
|
|
gfx.setColor(getBackground());
|
|
Dimension size = getSize();
|
|
gfx.fillRect(0, 0, size.width, size.height);
|
|
}
|
|
|
|
// Serialization constant
|
|
private static final long serialVersionUID = -2284879212465893870L;
|
|
}
|