crmspanel.java

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    /* CRMS, customer relationship management system
    Copyright (C) 2003  Service To Youth Council

    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 further information contact the SYC ICT department on [e-mail]
    98 Kermode Street
    North Adelaide
    South Australia
    SA 5006 
    [phone]
    */
/*
 *  CRMSPanel.java
 *
 *  Created on 31 March 2003, 02:46
 */
package crms.applet;

import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.*;
import java.lang.reflect.*;
import crms.vo.Permission;

/**
 *@author     dmurphy
 */
public abstract class CRMSPanel extends JPanel {

    /** The Panel is intended to <b>add</b> an item. */
    public static final int PANEL_TYPE_ADD	= 0;
    /** The panel mode is to edit an existing item, requires an ID */
    public static final int PANEL_TYPE_EDIT = 1;
	/** Indicate when the panel has not been initialised properly. */
	public static int PANEL_TYPE_INVALID	= 2;


    CRMSPanel currentPanel = null;
    CRMSPanel parent = null;

    Permission entityPermission = null;
    /**
     *  This method, when implemented on a concrete class will be responsible
     *  for instantiating components and adding them to this panel.
     */
    public abstract void init();

    
    /**
     *  This method is used by concrete classes to indicate that the 
     *  currently visible panel has changed.
     *
     *@param  newPanel  Integer representing the newly active panel.
     */
//    public void firePanelChanged(int newPanel) {
//        remove(getCurrentPanel());
//
//        CRMSPanel panel = null;
//
//        try {
//            panel = (CRMSPanel) getPanel(newPanel).newInstance();
//            System.out.println("Just created new instance of: " + panel.getClass());
//        } catch (Exception ex) {
//            throw new RuntimeException(ex);
//        }
//
//        add(panel, BorderLayout.CENTER);
//        setCurrentPanel(panel);
//        panel.setVisible(true);
//        panel.init();
//
//        // Yay! The following line <b>Must</b> be called to
//        // ensure that the panel repaints itself properly.
//        panel.revalidate();
//    }


    /**
     *  Allows the currently active child panel to be stored on this object. 
     *  This must be implemented by the concrete class to ensure that panel
     *  switching can occur. 
     *
     *@param  panel  The currently active panel
     */
    public void setCurrentPanel(CRMSPanel panel) {
        currentPanel = panel;
        boolean result = panel.requestFocusInWindow();
        System.out.println("CRMSPanel.setCurrentPanel: Attempt to requestFocusInWindow = " + result);
    }


    /**
     *  Returns the currently active child panel stored on this object.
     *
     *@return    The currently active child panel.
     */
    public CRMSPanel getCurrentPanel() {
        return currentPanel;
    }



    /**
     *  Overridden method from parent. (Probably unnecessary).
     *
     *@param  g  Description of the Parameter
     */
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
    }


    /**
     *  Returns a new instance of a CRMSPanel object with certain default
     *  properties. This is used to build new panels on the fly.
     *
     *@return    New CRMSPanel instance.
     */
    public static CRMSPanel getEmptyPanel() {
        CRMSPanel empty =
            new CRMSPanel() {
                public Class getPanel(int i) {
                    return null;
                }


                public void init() {
                }
            };
        empty.setBackground(Color.WHITE);
        return empty;
    }

}