Has Visible Children : Container « Swing JFC « Java
Has Visible Children
import java.awt.Component;
import java.awt.Container;
import java.awt.Point;
import java.util.ArrayList;
import javax.swing.RootPaneContainer;
import javax.swing.SwingUtilities;
/**
* 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: ComponentUtil.java,v 1.25 2005/12/04 13:46:04 jesper Exp $
public class Util {
public static boolean hasVisibleChildren(Component c) {
return getVisibleChildrenCount(c) > 0;
}
public static boolean isOnlyVisibleComponent(Component c) {
return c != null && c.isVisible() && getVisibleChildrenCount(c.getParent()) == 1;
}
public static boolean isOnlyVisibleComponents(Component[] c) {
if (c != null && c.length > 0) {
boolean visible = getVisibleChildrenCount(c[0].getParent()) == c.length;
if (visible)
for (int i = 0; i < c.length; i++)
visible = visible && c[i].isVisible();
return visible;
}
return false;
}
public static int getVisibleChildrenCount(Component c) {
if (c == null || !(c instanceof Container))
return 0;
int count = 0;
Container container = (Container) c;
for (int i = 0; i < container.getComponentCount(); i++)
if (container.getComponent(i).isVisible())
count++;
return count;
}
}
