Example usage for java.awt GraphicsEnvironment getScreenDevices

Introduction

In this page you can find the example usage for java.awt GraphicsEnvironment getScreenDevices.

Prototype

public abstract GraphicsDevice[] getScreenDevices() throws HeadlessException;

Source Link

Document

Returns an array of all of the screen GraphicsDevice objects.

Usage

From source file:util.ui.UiUtilities.java

/**
 * Centers a window to its parent frame and shows it.
 * <p>//w w  w. j a v a  2 s  .c o m
 * If the window has no parent frame it will be centered to the screen.
 *
 * @param win
 *          The window to center and show.
 */
public static void centerAndShow(Window win) {
    Dimension wD = win.getSize();
    Dimension frameD;
    Point framePos;
    Frame frame = JOptionPane.getFrameForComponent(win);

    // Should this window be centered to its parent frame?
    boolean centerToParentFrame = (frame != null) && (frame != win) && frame.isShowing();

    // Center to parent frame or to screen
    if (centerToParentFrame) {
        frameD = frame.getSize();
        framePos = frame.getLocation();
    } else {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        // dual head, use first screen
        if (ge.getScreenDevices().length > 1) {
            try {
                GraphicsDevice gd = ge.getDefaultScreenDevice();
                GraphicsConfiguration config = gd.getConfigurations()[0];
                frameD = config.getBounds().getSize();
                framePos = config.getBounds().getLocation();
            } catch (RuntimeException e) {
                frameD = Toolkit.getDefaultToolkit().getScreenSize();
                framePos = new Point(0, 0);
            }
        }
        // single screen only
        else {
            frameD = Toolkit.getDefaultToolkit().getScreenSize();
            framePos = new Point(0, 0);
        }
    }

    Point wPos = new Point(framePos.x + (frameD.width - wD.width) / 2,
            framePos.y + (frameD.height - wD.height) / 2);
    wPos.x = Math.max(0, wPos.x); // Make x > 0
    wPos.y = Math.max(0, wPos.y); // Make y > 0
    win.setLocation(wPos);
    win.setVisible(true);
}