JCheckBoxTree.java 文件源码

@Override
public Component getTreeCellRendererComponent(JTree tree, Object value,
        boolean selected, boolean expanded, boolean leaf, int row,
        boolean hasFocus) {
    TreeNode node = (TreeNode) value;
    TreePath tp = new TreePath(getPath(node));
    CheckedNode cn = nodesCheckingState.get(tp);
    checkBox.setIcon(getIcon(value));
    if (cn == null) {
        return this;
    }
    checkBox.setSelected(cn.isSelected);
    checkBox.setText(node.toString());
    checkBox.setOpaque(cn.isSelected && cn.hasChildren && !cn.allChildrenSelected);
    return this;
}