Java Window Center centerWindow(Window w)

Description

Center a window on the screen.

License

BSD License

Parameter

Parameter	Description
w	The window to center.

Declaration

public static final void centerWindow(Window w) 

Method Source Code

//package com.java2s;
/*L/*from w  w  w.j ava 2s . c o  m*/
 * Copyright Georgetown University, Washington University.
 *
 * Distributed under the OSI-approved BSD 3-Clause License.
 * See http://ncip.github.com/cab2b/LICENSE.txt for details.
 */

import java.awt.Component;

import java.awt.Dimension;

import java.awt.Point;

import java.awt.Window;

import javax.swing.SwingUtilities;

public class Main {
    /** Center a window on the screen.
     * @param w The window to center.
     */
    public static final void centerWindow(Window w) {
        Dimension screenSize = w.getToolkit().getScreenSize();
        Dimension windowSize = w.getSize();

        int x = (screenSize.width - windowSize.width) / 2;
        int y = (screenSize.height - windowSize.height) / 2;

        w.setLocation(x, y);
    }

    /** Center a window within the bounds of another window.
     *
     * @param w The window to center.
     * @param parent The window to center within.
     */

    public static final void centerWindow(Window parent, Window w) {
        Dimension windowSize = w.getSize();
        Dimension parentSize = parent.getSize();
        Point parentLocation = parent.getLocationOnScreen();

        int x = ((parentSize.width - windowSize.width) / 2) + parentLocation.x;
        int y = ((parentSize.height - windowSize.height) / 2) + parentLocation.y;

        // If placing the window at (x,y) would make part if it off-screen,
        // then center it in the middle of the screen instead.
        Dimension screenSize = w.getToolkit().getScreenSize();
        if (((x + windowSize.width) > screenSize.width) || (x < 0) || ((y + windowSize.height) > screenSize.height)
                || (y < 0)) {
            centerWindow(w);
        } else {
            w.setLocation(x, y);
        }
    }

    /** Center a window within the bounds of a component's parent window.
     *
     * @param w The window to center.
     * @param c The component within whose parent window this window should be
     * centered. If a window cannot be found in the component hierarchy above
     * <code>c</code>, the window is centered on the screen.
     */

    public static final void centerWindow(Component c, Window w) {
        Window pw = SwingUtilities.windowForComponent(c);

        if (pw == null) {
            centerWindow(w);
        } else {
            centerWindow(pw, w);
        }
    }
}

Related

1. centerOnParent(final Window child, final boolean absolute)
2. centerPosition(Window window, Window w, int width, int height)
3. packAndCenterWindow(Window dlg)
4. packAndDisplayInCenterOfScreen(final Window f)
5. positionCenterScreen(Window window)
6. showCentered(Window window)