Utils.java Source code

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Here is the source code for Utils.java

Source

/*
 * $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);
    }
}