dozentenmodul/src/main/java/org/openslx/dozmod/gui/changemonitor/CheckBoxTreeWrapper.java


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package org.openslx.dozmod.gui.changemonitor;

import java.util.Comparator;

import javax.swing.tree.TreePath;

import org.openslx.dozmod.gui.control.JCheckBoxTree;
import org.openslx.dozmod.gui.control.JCheckBoxTree.CheckChangeEvent;
import org.openslx.dozmod.gui.control.JCheckBoxTree.CheckChangeEventListener;

class CheckBoxTreeWrapper extends AbstractControlWrapper<TreePath[]> {
	
	private static final Comparator<TreePath[]> COMPARATOR = new Comparator<TreePath[]>() {
		@Override
		public int compare(TreePath[] o1, TreePath[] o2) {
			if (o1 == null && o2 == null)
				return 0;
			if (o1 == null)
				return o2.length;
			if (o2 == null)
				return -o1.length;
			if (o1.length != o2.length)
				return o2.length - o1.length;
			for (int i = 0; i < o1.length; ++i) {
				TreePath p1 = o1[i];
				TreePath p2 = o2[i];
				if (p1.getPathCount() != p2.getPathCount())
					return p2.getPathCount() - p1.getPathCount();
				for (; p1 != null && p2 != null; p1 = p1.getParentPath(), p2 = p2.getParentPath()) {
					long diff = p1.getLastPathComponent().hashCode() - p2.getLastPathComponent().hashCode();
					if (diff != 0)
						return (int)diff;
				}
			}
			return 0;
		}
	};
	
	private final JCheckBoxTree tree;
	
	public CheckBoxTreeWrapper(DialogChangeMonitor dcm, JCheckBoxTree t) {
		super(dcm, COMPARATOR);
		tree = t;
		tree.addCheckChangeEventListener(new CheckChangeEventListener() {
			public void checkStateChanged(CheckChangeEvent event) {
				contentChanged();
			}
		});
	}
	
	@Override
	TreePath[] getCurrentValue() {
		return tree.getCheckedPaths();
	}
}