afocustraversalpolicy.java

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/******************************************************************************
 * The contents of this file are subject to the   Compiere License  Version 1.1
 * ("License"); You may not use this file except in compliance with the License
 * You may obtain a copy of the License at http://www.compiere.org/license.html
 * Software distributed under the License is distributed on an  "AS IS"  basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * The Original Code is Compiere ERP & CRM Smart Business Solution. The Initial
 * Developer of the Original Code is Jorg Janke. Portions created by Jorg Janke
 * are Copyright (C) 1999-2005 Jorg Janke.
 * All parts are Copyright (C) 1999-2005 ComPiere, Inc.  All Rights Reserved.
 * Contributor(s): ______________________________________.
 *****************************************************************************/
package org.compiere.apps;

import java.awt.*;
import javax.swing.*;
import org.compiere.swing.*;


/**
 *  Compiere Application Focus Traversal Policy
 *
 *  @author     Jorg Janke
 *  @version    $Id: AFocusTraversalPolicy.java,v 1.7 2005/12/05 02:36:07 jjanke Exp $
 */
public class AFocusTraversalPolicy extends LayoutFocusTraversalPolicy
{
	/**
	 *  Get singleton
	 *  @return AFocusTraversalPolicy
	 */
	public static AFocusTraversalPolicy get()
	{
		if (s_policy == null)
			s_policy = new AFocusTraversalPolicy();
		return s_policy;
	}   //  get

	/** Default Policy          */
	private static AFocusTraversalPolicy s_policy = new AFocusTraversalPolicy();

	/**************************************************************************
	 *  Constructor
	 */
	public AFocusTraversalPolicy ()
	{
		super();
	}   //  AFocusTraversalPolicy

	boolean m_default = false;
	
	/**
	 * 	Get Default Component
	 *	@param aContainer container
	 *	@return default or null
	 */
	public Component getDefaultComponent (Container aContainer)
	{
	//	info ("Root: ", aContainer);
		m_default = true;
		Component c = super.getDefaultComponent (aContainer);
	//	info ("  Default: ", c);
		m_default = false;
		return c;
	}	//	getDefaultComponent

	/**
	 * Determines whether the specified <code>Component</code>
	 * is an acceptable choice as the new focus owner.
	 * This method performs the following sequence of operations:
	 * <ol>
	 * <li>Checks whether <code>aComponent</code> is visible, displayable,
	 *     enabled, and focusable.  If any of these properties is
	 *     <code>false</code>, this method returns <code>false</code>.
	 * <li>If <code>aComponent</code> is an instance of <code>JTable</code>,
	 *     returns <code>true</code>.
	 * <li>If <code>aComponent</code> is an instance of <code>JComboBox</code>,
	 *     then returns the value of
	 *     <code>aComponent.getUI().isFocusTraversable(aComponent)</code>.
	 * <li>If <code>aComponent</code> is a <code>JComponent</code>
	 *     with a <code>JComponent.WHEN_FOCUSED</code>
	 *     <code>InputMap</code> that is neither <code>null</code>
	 *     nor empty, returns <code>true</code>.
	 * <li>Returns the value of
	 *     <code>DefaultFocusTraversalPolicy.accept(aComponent)</code>.
	 * </ol>
	 *
	 * @param aComponent the <code>Component</code> whose fitness
	 *                   as a focus owner is to be tested
	 * @see java.awt.Component#isVisible
	 * @see java.awt.Component#isDisplayable
	 * @see java.awt.Component#isEnabled
	 * @see java.awt.Component#isFocusable
	 * @see javax.swing.plaf.ComboBoxUI#isFocusTraversable
	 * @see javax.swing.JComponent#getInputMap()
	 * @see java.awt.DefaultFocusTraversalPolicy#accept
	 * @return <code>true</code> if <code>aComponent</code> is a valid choice
	 *         for a focus owner;
	 *         otherwise <code>false</code>
	 */
	protected boolean accept(Component aComponent)
	{
		if (!super.accept(aComponent))
			return false;

		//  TabbedPane
		if (aComponent instanceof JTabbedPane)
			return false;
		//  R/O Editors
		if (aComponent instanceof CEditor)
		{
			CEditor ed = (CEditor)aComponent;
			if (!ed.isReadWrite())
				return false;
			if (m_default	//	get Default Focus 
				&& ("AD_Client_ID".equals(aComponent.getName()) || "AD_Org_ID".equals(aComponent.getName()) ))
				return false;
		}
		//  Toolbar Buttons
		if (aComponent.getParent() instanceof JToolBar)
			return false;
		//
		return true;
	}   //  accept

	/**************************************************************************
	 *  Dump info
	 *  @param title
	 *  @param c
	 */
	private void info (String title, Component c)
	{
		System.out.print (title);
		if (c == null)
			System.out.println (" - null");
		else
		{
			System.out.print (c.getClass().getName());
			System.out.println (" - " + c.getName());
		}
	}   //  info

}   //  AFocusTraversalPolicy