Application: gvSIG desktop

package com.iver.utiles.centerComponent;

import java.awt.Component;

import java.awt.Point;

import java.awt.Rectangle;

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/**

 * Allows center a component (Ex. JInternalFrame, JFrame, etc.) respect its parent component

 *

 * Exceptions:

 *  - If the component is a JDialog -> better use:

 *      jDialog.setLocationRelativeTo(parentComponent);

 *

 *  - If the component is a JFrame or a JWindow -> better use:

 *      jFrame.setSize(width, height);

 *      jFrame.setLocationRelativeTo(null);

 *    or

 *      jWindow.setSize(width, height);

 *      jWindow.setLocationRelativeTo(null);

 *

 * @author Pablo Piqueras Bartolom? (p_queras@hotmail.com)

 */

public class CenterComponent {

        /**

         * Centers a component (Ex. JInternalFrame, JFrame, etc.) according its size and the bounds of its parent

         *

         * Exceptions:

         *  - If the component is a JDialog -> better use:

         *      jDialog.setLocationRelativeTo(parentComponent);

         *

         *  - If the component is a JFrame or a JWindow -> better use:

         *      jFrame.setSize(width, height);

         *      jFrame.setLocationRelativeTo(null);

         *    or

         *      jWindow.setSize(width, height);

         *      jWindow.setLocationRelativeTo(null);

         *

           * @param component The component to center

         * @param parentBounds Bounds of the parent of the component.

         */

        public static void centerComponent(Component component, Rectangle parentBounds) {

                final int DefaultXMargin = 20;

                final int DefaultYMargin = 20;

                final int MinimumXMargin = 10;

                final int MinimumYMargin = 10;

                // The top-left square of JComponent reference

                Point newReferencePoint = new Point();

                newReferencePoint.x = (parentBounds.x + (parentBounds.width - component.getWidth()) / 2);

                newReferencePoint.y = (parentBounds.y + (parentBounds.height - component.getHeight()) / 2);

                // Calculate the new point reference (Assure that the top-left corner is showed)

                if (newReferencePoint.x < 0)

                {

                        if (newReferencePoint.x > MinimumXMargin)

                                newReferencePoint.x = DefaultXMargin;

                        else

                                newReferencePoint.x = 0;

                }

                if (newReferencePoint.y < 0)

                {

                        if (newReferencePoint.y > MinimumYMargin)

                                newReferencePoint.y = DefaultYMargin;

                        else

                                newReferencePoint.y = 0;

                }

                // Set the new location for this JComponent object

                component.setLocation(newReferencePoint);

        }

}