text: /**
   * Copyright (C) 2001-2020 by RapidMiner and the contributors
   * 
   * Complete list of developers available at our web site:
   * 
   * http://rapidminer.com
   * 
   * This program is free software: you can redistribute it and/or modify it under the terms of the
   * GNU Affero General Public License as published by the Free Software Foundation, either version 3
   * of the License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
   * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Affero General Public License for more details.
   * 
   * You should have received a copy of the GNU Affero General Public License along with this program.
   * If not, see http://www.gnu.org/licenses/.
  */
  package com.rapidminer.gui.tools;
  
  import java.awt.BorderLayout;
  import java.awt.Component;
  
  import javax.swing.JPanel;
  import javax.swing.JTree;
  import javax.swing.tree.DefaultTreeCellRenderer;
  import javax.swing.tree.TreeCellRenderer;
  import javax.swing.tree.TreePath;
  
  
  /**
   * This is the combined renderer for the check tree.
   * 
   * @author Santhosh Kumar, Ingo Mierswa 16:58:56 ingomierswa Exp $
   */
  public class ExtendedCheckTreeCellRenderer extends JPanel implements TreeCellRenderer {
  
  	private static final long serialVersionUID = -2532264318689978630L;
  
  	private ExtendedCheckTreeSelectionModel selectionModel;
  
  	private TreeCellRenderer delegate;
  
  	private ExtendedTriStateCheckBox checkBox = new ExtendedTriStateCheckBox();
  
  	public ExtendedCheckTreeCellRenderer(TreeCellRenderer delegate, ExtendedCheckTreeSelectionModel selectionModel) {
  		this.delegate = delegate;
  		this.selectionModel = selectionModel;
  		setLayout(new BorderLayout());
  		setOpaque(false);
  		checkBox.setOpaque(false);
  	}
  
  	@Override
  	public java.awt.Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded,
  			boolean leaf, int row, boolean hasFocus) {
  		Component renderer = delegate.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
  		((DefaultTreeCellRenderer) renderer).setLeafIcon(null);
  		((DefaultTreeCellRenderer) renderer).setIcon(null);
  		((DefaultTreeCellRenderer) renderer).setOpenIcon(null);
  		((DefaultTreeCellRenderer) renderer).setClosedIcon(null);
  
  		TreePath path = tree.getPathForRow(row);
  		if (path != null) {
  			if (selectionModel.isPathSelected(path, true)) {
  				checkBox.setState(Boolean.TRUE);
  			} else {
  				checkBox.setState(selectionModel.isPartiallySelected(path) ? null : Boolean.FALSE);
  			}
  		}
  		removeAll();
  		add(checkBox, BorderLayout.WEST);
  		add(renderer, BorderLayout.CENTER);
  		return this;
  	}
  }
  