Java JComponent Container getTopAncestor(JComponent start)

Description

search of the hierarcy of components for an instance of a given class

License

Apache License

Parameter

Parameter	Description
start	- starting component
theClass	- required class

Return

possibly null component - null says no ancestor found

Declaration

public static Container getTopAncestor(JComponent start) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import javax.swing.*;

import java.awt.*;

public class Main {
    public static Component getTopAncestor(Component c) {
        Component ret = c.getParent();
        if (ret == null)
            return c;
        return getTopAncestor(ret);
    }//from  w  w  w .j a  v  a 2 s.  c om

    /**
     * search of the hierarcy of components for an instance of a given class
     *
     * @param start    - starting component
     * @param theClass - required class
     * @return possibly null component - null says no ancestor found
     */
    public static Container getTopAncestor(JComponent start) {
        Container parent = start.getParent();
        if (parent == null)
            return start;
        if (parent instanceof JComponent)
            return getTopAncestor((JComponent) parent);
        if (parent instanceof JFrame)
            return parent;
        if (parent instanceof JDialog)
            return parent;
        if (parent instanceof JWindow)
            return parent;
        else
            return null;
    }
}

Related

1. getRootPane(final Component component)
2. getRootPaneContainer(Component c)
3. getRootPaneContainer(Component c)
4. getRootWindow(Component component)
5. getStringValue(JComponent component)
6. getTopLevelContainer(JComponent component)
7. getWindow(final JComponent comp)
8. getWindow(JComponent c)
9. getWindowLocation(JComponent start)