Mega Code Archive
Center that window on the given desktop
<![CDATA[
/*
* $Id: WindowUtils.java,v 1.16 2009/05/25 16:37:52 kschaefe Exp $
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.Rectangle;
import javax.swing.JInternalFrame;
/**
* Encapsulates various utilities for windows (ie: <code>Frame</code> and
* <code>Dialog</code> objects and descendants, in particular).
*
* @author Richard Bair
*/
public class Utils {
/**
* <p/>
* Returns the <code>Point</code> at which a window should be placed to
* center that window on the given desktop.
* </p>
* <p/>
* Some thought was taken as to whether to implement a method such as this,
* or to simply make a method that, given a window, will center it. It was
* decided that it is better to not alter an object within a method.
* </p>
*
* @param window The window (JInternalFrame) to calculate the center point
* for. This object can not be null.
*
* @return the <code>Point</code> at which the window should be placed to
* center that window on the given desktop
*/
public static Point getPointForCentering(JInternalFrame window) {
try {
//assert window != null;
Point mousePoint = MouseInfo.getPointerInfo().getLocation();
GraphicsDevice[] devices = GraphicsEnvironment
.getLocalGraphicsEnvironment().getScreenDevices();
for (GraphicsDevice device : devices) {
Rectangle bounds = device.getDefaultConfiguration().getBounds();
//check to see if the mouse cursor is within these bounds
if (mousePoint.x >= bounds.x && mousePoint.y >= bounds.y
&& mousePoint.x <= (bounds.x + bounds.width)
&& mousePoint.y <= (bounds.y + bounds.height)) {
//this is it
int screenWidth = bounds.width;
int screenHeight = bounds.height;
int width = window.getWidth();
int height = window.getHeight();
return new Point(((screenWidth - width) / 2) + bounds.x,
((screenHeight - height) / 2) + bounds
.y);
}
}
} catch (Exception e) {
}
return new Point(0, 0);
}
}
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