checknode.java

来自「自制java的swing组件」· Java 代码 · 共 70 行

package zb.swing;

import java.util.*;

import javax.swing.tree.*;

/**
 * @version 1.0 01/11/99
 */
public class CheckNode
    extends DefaultMutableTreeNode {

  public final static int SINGLE_SELECTION = 0;
  public final static int DIG_IN_SELECTION = 4;
  protected int selectionMode;
  protected boolean isSelected;

  public CheckNode() {
    this(null);
  }

  public CheckNode(Object userObject) {
    this(userObject, true, false);
  }

  public CheckNode(Object userObject, boolean allowsChildren
                   , boolean isSelected) {
    super(userObject, allowsChildren);
    this.isSelected = isSelected;
    setSelectionMode(DIG_IN_SELECTION);
  }

  public void setSelectionMode(int mode) {
    selectionMode = mode;
  }

  public int getSelectionMode() {
    return selectionMode;
  }

  public void setSelected(boolean isSelected) {
    this.isSelected = isSelected;

    if ( (selectionMode == DIG_IN_SELECTION)
        && (children != null)) {
      Enumeration enum = children.elements();
      while (enum.hasMoreElements()) {
        CheckNode node = (CheckNode) enum.nextElement();
        node.setSelected(isSelected);
      }
    }
  }

  public boolean isSelected() {
    return isSelected;
  }

  // If you want to change "isSelected" by CellEditor,
  /*
     public void setUserObject(Object obj) {
    if (obj instanceof Boolean) {
      setSelected(((Boolean)obj).booleanValue());
    } else {
      super.setUserObject(obj);
    }
     }
   */

}