Package com.puppycrawl.tools.checkstyle.gui

Source Code of com.puppycrawl.tools.checkstyle.gui.TreeTableModelAdapter

////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2002  Oliver Burn
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

/*
* @(#)TreeTableModelAdapter.java  1.2 98/10/27
*
* Copyright 1997, 1998 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of Sun Microsystems, Inc. ("Confidential Information").  You
* shall not disclose such Confidential Information and shall use
* it only in accordance with the terms of the license agreement
* you entered into with Sun.
*/

package com.puppycrawl.tools.checkstyle.gui;

import javax.swing.JTree;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
import javax.swing.tree.TreePath;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;

/**
* 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 1.2 10/27/98
*
* @author Philip Milne
* @author Scott Violet
*/
public class TreeTableModelAdapter extends AbstractTableModel
{
    private JTree mTree;
    private TreeTableModel mTreeTableModel;

    public TreeTableModelAdapter(TreeTableModel aTreeTableModel, JTree aTree)
    {
        this.mTree = aTree;
        this.mTreeTableModel = aTreeTableModel;

        aTree.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();
            }
        });

        // Install a TreeModelListener that can update the table when
        // mTree changes. We use delayedFireTableDataChanged as we can
        // not be guaranteed the mTree will have finished processing
        // the event before us.
        aTreeTableModel.addTreeModelListener(new TreeModelListener()
        {
            public void treeNodesChanged(TreeModelEvent e)
            {
                delayedFireTableDataChanged();
            }

            public void treeNodesInserted(TreeModelEvent e)
            {
                delayedFireTableDataChanged();
            }

            public void treeNodesRemoved(TreeModelEvent e)
            {
                delayedFireTableDataChanged();
            }

            public void treeStructureChanged(TreeModelEvent e)
            {
                delayedFireTableDataChanged();
            }
        });
    }

    // Wrappers, implementing TableModel interface.

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

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

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

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

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

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

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

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

    /**
     * Invokes fireTableDataChanged after all the pending events have been
     * processed. SwingUtilities.invokeLater is used to handle this.
     */
    protected void delayedFireTableDataChanged()
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                fireTableDataChanged();
            }
        });
    }
}

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