package us.daveread.basicquery.gui;

 import java.awt.Dimension;

 import java.awt.Point;

 import java.awt.Toolkit;

 import java.awt.Window;

 /**

  * <p>Title: GUI utilities</p>

  * <p>Description: </p>

  * <p>Copyright: Copyright (c) 2004-2014</p>

  * <p>Company: </p>

  * 

  * @author David Read

  */

 public class GUIUtility {

   /**

    * Don't want instances of this class created.

    */

   private GUIUtility() {

   }

   /**

    * Centers a window on the parent window or the screen.  If the parent

    * is null, or smaller than the child, the child is centered on the

    * screen.

    * @param winaChild The window being centered.

    * @param winaParent The parent window, or null if no parent frame exists.

    */

   public static void center(Window winaChild, Window winaParent) {

     Dimension dimlParentSize, dimlMySize;

     Point ptlUpperLeft;

     int ilX, ilY;

     dimlMySize = winaChild.getSize();

     if (winaParent == null) {

       dimlParentSize = Toolkit.getDefaultToolkit().getScreenSize();

       ptlUpperLeft = new Point(0, 0);

     } else {

       dimlParentSize = winaParent.getSize();

       ptlUpperLeft = winaParent.getLocation();

       if (dimlMySize.width > dimlParentSize.width 

           || dimlMySize.height > dimlParentSize.height) {

         dimlParentSize = Toolkit.getDefaultToolkit().getScreenSize();

         ptlUpperLeft = new Point(0, 0);

       }

     }

     if (dimlParentSize.width >= dimlMySize.width) {

       ilX = (dimlParentSize.width - dimlMySize.width) / 2;

     } else {

       ilX = 0;

     }

     if (dimlParentSize.height >= dimlMySize.height) {

       ilY = (dimlParentSize.height - dimlMySize.height) / 2;

     } else {

       ilY = 0;

     }

     ilX += ptlUpperLeft.x;

     ilY += ptlUpperLeft.y;

     winaChild.setLocation(ilX, ilY);

   }

 }