invisibletreemodel.java

Java中Swing界面库中几个类使用的例子

/*  (swing1.1) */
 
package jp.gr.java_conf.tame.swing.tree;

import javax.swing.tree.*;


/**
 * @version 1.0 01/12/99
 */
public class InvisibleTreeModel extends DefaultTreeModel {

  protected boolean filterIsActive;

  public InvisibleTreeModel(TreeNode root) {
    this(root, false);
  }

  public InvisibleTreeModel(TreeNode root, boolean asksAllowsChildren) {
    this(root, false, false);
  }

  public InvisibleTreeModel(TreeNode root, boolean asksAllowsChildren
			    ,boolean filterIsActive) {
    super(root, asksAllowsChildren);
    this.filterIsActive = filterIsActive;
  }

  public void activateFilter(boolean newValue) {
    filterIsActive = newValue;
  }

  public boolean isActivatedFilter() {
    return filterIsActive;
  }

  public Object getChild(Object parent, int index) {
    if (filterIsActive) {
      if (parent instanceof InvisibleNode) {
	return ((InvisibleNode)parent).getChildAt(index,filterIsActive);
      }
    }
    return ((TreeNode)parent).getChildAt(index);
  }

  public int getChildCount(Object parent) {
    if (filterIsActive) {
      if (parent instanceof InvisibleNode) {
	return ((InvisibleNode)parent).getChildCount(filterIsActive);
      }
    }
    return ((TreeNode)parent).getChildCount();
  }

}