TreeCheckingSynchronizer.java

package it.cnr.imaa.essi.lablib.gui.checkboxtree;

import javax.swing.tree.TreePath;

public class TreeCheckingSynchronizer implements TreeCheckingListener {

	protected TreeCheckingModel model1;

	protected TreeCheckingModel model2;

	public TreeCheckingSynchronizer(CheckboxTree tree1, CheckboxTree tree2) {
		this.model1 = tree1.getCheckingModel();
		this.model2 = tree2.getCheckingModel();
		tree1.addTreeCheckingListener(this);
		tree2.addTreeCheckingListener(this);
	}

	@Override
	public void valueChanged(TreeCheckingEvent e) {
		Object source = e.getSource();
		TreePath leadingPath = e.getPath();
		boolean checked = e.isCheckedPath();
		TreeCheckingModel dest = source.equals(this.model1) ? this.model2 : this.model1;
		if (checked) {
			if (!dest.isPathChecked(leadingPath))
				dest.addCheckingPath(leadingPath);
		} else {
			if (dest.isPathChecked(leadingPath))
				dest.removeCheckingPath(leadingPath);
		}
	}

}