Java JFrame Center centerWindowInFrame(Component window, Window frame)

Description

center Window In Frame

License

Apache License

Declaration

public static void centerWindowInFrame(Component window, Window frame) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.awt.Component;

import java.awt.Dimension;

import java.awt.Frame;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;

import java.awt.Point;
import java.awt.Rectangle;

import java.awt.Window;

import javax.swing.SwingUtilities;

public class Main {
    public static void centerWindowInFrame(Component window, Window frame) {
        // Note FileDialog instances in jdk 1.4.1 have no size until FileDialog.show()
        // which blocks i.e., we can't center FileDialogs.

        Dimension dimCenter;/*w  ww  .ja v  a2 s.  co  m*/
        Point ptOffset;
        if (frame != null) {
            if ((!(frame instanceof Frame) || ((Frame) frame).getState() != Frame.ICONIFIED) && frame.isShowing()) {
                // Center in frame
                dimCenter = frame.getSize();
                ptOffset = frame.getLocation();
            } else {
                // Retry either containing window or screen
                centerWindowInFrame(window, null);
                return;
            }
        } else {
            Window owner = SwingUtilities.getWindowAncestor(window);
            if (owner != null && owner.isShowing() && (owner.getMinimumSize().height < owner.getHeight())) {
                // Retry with owner window as frame
                if ((!(owner instanceof Frame) || ((Frame) owner).getState() != Frame.ICONIFIED)
                        && owner.isShowing()) {
                    // Center in frame
                    dimCenter = owner.getSize();
                    ptOffset = owner.getLocation();
                    window.setLocation(ptOffset.x + (dimCenter.width - window.getWidth()) / 2,
                            ptOffset.y + (dimCenter.height - window.getHeight()) / 2);
                }

                return;
            }

            // Center in screen
            Rectangle screenRect = getPrimaryMonitorScreenRect();
            dimCenter = new Dimension((int) screenRect.getWidth(), (int) screenRect.getHeight());
            ptOffset = new Point((int) screenRect.getX(), (int) screenRect.getY());
        }

        window.setLocation(ptOffset.x + (dimCenter.width - window.getWidth()) / 2,
                ptOffset.y + (dimCenter.height - window.getHeight()) / 2);
    }

    public static Rectangle getPrimaryMonitorScreenRect() {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice[] gds = ge.getScreenDevices();
        return gds[0].getConfigurations()[0].getBounds();
    }
}

Related

1. centerPosition(JFrame invokerFrame, Window w, int width, int height)
2. centerWindow(JFrame frame)
3. centerWindow(JFrame frame)
4. centerWindow(JFrame frame)
5. centerWindow(JFrame window)
6. centerWindowOnParent(Window w, JFrame parent)
7. centerWithinDesktop(JInternalFrame frame)
8. createCenteredJFrame(String title, int width, int height, boolean autoclose)
9. getCenteringFrame()