Package org.pentaho.reporting.ui.datasources.table

Source Code of org.pentaho.reporting.ui.datasources.table.EditableHeaderUI

/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

package org.pentaho.reporting.ui.datasources.table;

import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseEvent;
import javax.swing.SwingUtilities;
import javax.swing.event.MouseInputListener;
import javax.swing.plaf.basic.BasicTableHeaderUI;
import javax.swing.table.TableColumnModel;

public class EditableHeaderUI extends BasicTableHeaderUI
{
  public EditableHeaderUI()
  {
  }

  protected MouseInputListener createMouseInputListener()
  {
    return new MouseInputHandler((EditableHeader) header);
  }

  private class MouseInputHandler extends BasicTableHeaderUI.MouseInputHandler
  {
    private Component dispatchComponent;
    private EditableHeader header;

    public MouseInputHandler(final EditableHeader header)
    {
      this.header = header;
    }

    private void setDispatchComponent(final MouseEvent e)
    {
      final Component editorComponent = header.getEditorComponent();
      final Point p = e.getPoint();
      final Point p2 = SwingUtilities.convertPoint(header, p, editorComponent);
      dispatchComponent = SwingUtilities.getDeepestComponentAt(editorComponent, p2.x, p2.y);
    }

    private boolean repostEvent(final MouseEvent e)
    {
      if (dispatchComponent == null)
      {
        return false;
      }
      final MouseEvent e2 = SwingUtilities.convertMouseEvent(header, e, dispatchComponent);
      dispatchComponent.dispatchEvent(e2);
      return true;
    }

    public void mousePressed(final MouseEvent e)
    {
      super.mousePressed(e);
      if (!SwingUtilities.isLeftMouseButton(e))
      {
        return;
      }

      if (header.getResizingColumn() == null)
      {
        final Point p = e.getPoint();
        final TableColumnModel columnModel = header.getColumnModel();
        final int index = columnModel.getColumnIndexAtX(p.x);
        if (index != -1)
        {
          if (header.editCellAt(index, e))
          {
            setDispatchComponent(e);
            repostEvent(e);
          }
        }
      }
    }

    public void mouseReleased(final MouseEvent e)
    {
      super.mouseReleased(e);
      if (!SwingUtilities.isLeftMouseButton(e))
      {
        return;
      }
      repostEvent(e);
      dispatchComponent = null;
    }
  }
}
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