treetablemodeladapter.java

A wrapper class that implements the TableModel interface, given both TreeTableModel and a JTree.

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import com.sun.java.swing.table.AbstractTableModel;
import com.sun.java.swing.JTree;
import com.sun.java.swing.tree.TreePath;
import com.sun.java.swing.event.TreeExpansionEvent;
import com.sun.java.swing.event.TreeExpansionListener;

/**
 * This is a wrapper class takes a TreeTableModel and implements 
 * the table model interface. The implementation is trivial, with 
 * all of the event dispatching support provided by the superclass: 
 * the AbstractTableModel. 
 *
 * @version %I% %G%
 *
 * @author Philip Milne
 * @author Scott Violet
 */


public class TreeTableModelAdapter extends AbstractTableModel
{
    JTree tree;
    TreeTableModel treeTableModel;

    public TreeTableModelAdapter(TreeTableModel treeTableModel, JTree tree) {
        this.tree = tree;
        this.treeTableModel = treeTableModel;

	tree.addTreeExpansionListener(new TreeExpansionListener() {
	    // Don't use fireTableRowsInserted() here; 
	    // the selection model would get  updated twice. 
	    public void treeExpanded(TreeExpansionEvent event) {  
	      fireTableDataChanged(); 
	    }
            public void treeCollapsed(TreeExpansionEvent event) {  
	      fireTableDataChanged(); 
	    }
	});
    }

  // Wrappers, implementing TableModel interface. 

    public int getColumnCount() {
	return treeTableModel.getColumnCount();
    }

    public String getColumnName(int column) {
	return treeTableModel.getColumnName(column);
    }

    public Class getColumnClass(int column) {
	return treeTableModel.getColumnClass(column);
    }

    public int getRowCount() {
	return tree.getRowCount();
    }

    protected Object nodeForRow(int row) {
	TreePath treePath = tree.getPathForRow(row);
	return treePath.getLastPathComponent();         
    }

    public Object getValueAt(int row, int column) {
	return treeTableModel.getValueAt(nodeForRow(row), column);
    }

    public boolean isCellEditable(int row, int column) {
         return treeTableModel.isCellEditable(nodeForRow(row), column); 
    }

    public void setValueAt(Object value, int row, int column) {
	treeTableModel.setValueAt(value, nodeForRow(row), column);
    }
}