iconnoderenderer.java~3~

来自「java class文件介绍」· JAVA~3~ 代码 · 共 40 行

package zb.swing.renderer;

import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;
import zb.swing.*;

/**
 * @version 1.0 01/12/99
 */
public class IconNodeRenderer extends DefaultTreeCellRenderer {

  public Component getTreeCellRendererComponent(JTree tree, Object value,
      boolean sel, boolean expanded, boolean leaf,
      int row, boolean hasFocus) {

    super.getTreeCellRendererComponent(tree, value,
       sel, expanded, leaf, row, hasFocus);

    Icon icon = ((IconNode)value).getIcon();

    if (icon == null) {
      Hashtable icons = (Hashtable)tree.getClientProperty("JTree.icons");
      String name = ((IconNode)value).getIconName();
      if ((icons != null) && (name != null)) {
        icon = (Icon)icons.get(name);
        if (icon != null) {
          setIcon(icon);
        }
      }
    } else {
      setIcon(icon);
    }

    return this;
  }
}