4cd533411e
* java/awt/Canvas.java (serialVersionUID): New constant. Updated copyright. Added javadoc from Classpath. * java/awt/ItemSelectable.java: Replaced with Classpath version. From-SVN: r48934
81 lines
2.6 KiB
Java
81 lines
2.6 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.
|
|
|
|
As a special exception, if you link this library with other files to
|
|
produce an executable, this library does not by itself cause the
|
|
resulting executable to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why the
|
|
executable file might be covered by the GNU General Public License. */
|
|
|
|
|
|
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;
|
|
}
|