iconnoderenderer.java

来自「tame,扩展了好多SWing组件:JTable」· Java 代码 · 共 41 行

/* (swing1.1) */
package tame.tree;

import java.awt.Component;
import java.util.Hashtable;

import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;

/**
@author Nobuo Tamemasa
@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;
  }
}