xref: /AOO41X/main/odk/examples/java/Inspector/HideableMutableTreeNode.java (revision cdf0e10c4e3984b49a9502b011690b615761d4a3)

// *** HideableMutableTreeNode ***
import javax.swing.*;
import javax.swing.tree.*;

/**
 * <code>HideableMutableTreeNode</code> is a <code>DefaultMutableTreeNode</code>
 * implementation that works with <code>HideableTreeModel</code>.
 */
public class HideableMutableTreeNode extends DefaultMutableTreeNode {
	/**
	 * The node is visible flag.
	 */
	public boolean bIsvisible = true;
        private static final String SDUMMY = "Dummy";


	/**
	 * Creates a tree node that has no parent and no children, but which
	 * allows children.
	 */
	public HideableMutableTreeNode() {
            super();
	}

	/**
	 * Creates a tree node with no parent, no children, but which allows
	 * children, and initializes it with the specified user object.
	 *
	 * @param  userObject - an Object provided by the user that
	 *                      constitutes the node's data
	 */
	public HideableMutableTreeNode(Object _userObject) {
            super(_userObject);
	}

	/**
	 * Creates a tree node with no parent, no children, initialized with the
	 * specified user object, and that allows children only if specified.
	 *
	 * @param  _userObject     - an Object provided by the user that describes the node's data
	 * @param  _ballowsChildren - if true, the node is allowed to have childnodes -- otherwise, it is always a leaf node
	 */
	public HideableMutableTreeNode(Object _userObject, boolean _ballowsChildren) {
            super(_userObject, _ballowsChildren);
	}

	/**
	 * Checks if the node is visible.
	 *
	 * @return  true if the node is visible, else false
	 */
	public boolean isVisible() {
            return this.bIsvisible;
	}

	/**
	 * Sets if the node is visible.
	 *
	 * @param  returns true if the node is visible, else false
	 */
	public void setVisible(boolean _bIsVisible) {
            this.bIsvisible = _bIsVisible;
	}


        public void addDummyNode(){
            removeDummyNode();
            DefaultMutableTreeNode oDefaultMutableTreeNode = new DefaultMutableTreeNode(SDUMMY);
            add(oDefaultMutableTreeNode);

        }


        public boolean removeDummyNode(){
            boolean breturn = false;
            if (getChildCount() == 1){
                DefaultMutableTreeNode oDefaultMutableTreeNode = (DefaultMutableTreeNode) getChildAt(0);
                if (oDefaultMutableTreeNode != null){
                    if (oDefaultMutableTreeNode.getUserObject().equals(SDUMMY)){
                        remove(0);
                        breturn = true;
                    }
                }
            }
            return breturn;
        }

}