/*
 * Copyright (C) 2004 NNL Technology AB
 * Visit www.infonode.net for information about InfoNode(R) 
 * products and how to contact NNL Technology AB.
 *
 * 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.
 */


// $Id: ComponentPaintChecker.java,v 1.4 2005/12/04 13:46:04 jesper Exp $
package net.infonode.gui;

import javax.swing.*;
import java.awt.*;
import java.awt.event.HierarchyEvent;
import java.awt.event.HierarchyListener;

/**
 * @author johan
 */
public class ComponentPaintChecker {
  private boolean okToPaint = false;

  public ComponentPaintChecker(final Component c) {
    c.addHierarchyListener(new HierarchyListener() {
      public void hierarchyChanged(HierarchyEvent e) {
        if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) == HierarchyEvent.SHOWING_CHANGED) {
          if (c.isDisplayable())
            SwingUtilities.invokeLater(new Runnable() {
              public void run() {
                okToPaint = true;
              }
            });
          else
            okToPaint = false;
        }
      }
    });
  }

  public boolean isPaintingOk() {
    return okToPaint;
  }
}