/* TableColumn.java --
   Copyright (C) 2002, 2004 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath 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
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


package javax.swing.table;

import java.beans.PropertyChangeListener;
import java.io.Serializable;

import javax.swing.event.SwingPropertyChangeSupport;

/**
 * TableColumn
 * @author	Andrew Selkirk
 * @version	1.0
 */
public class TableColumn
  implements Serializable
{
  static final long serialVersionUID = -6113660025878112608L;

  /**
   * COLUMN_WIDTH_PROPERTY
   */
  public static final String COLUMN_WIDTH_PROPERTY = "columWidth";

  /**
   * HEADER_VALUE_PROPERTY
   */
  public static final String HEADER_VALUE_PROPERTY = "headerValue";

  /**
   * HEADER_RENDERER_PROPERTY
   */
  public static final String HEADER_RENDERER_PROPERTY = "headerRenderer";

  /**
   * CELL_RENDERER_PROPERTY
   */
  public static final String CELL_RENDERER_PROPERTY = "cellRenderer";

  /**
   * modelIndex
   */
  protected int modelIndex;

  /**
   * identifier
   */
  protected Object identifier;

  /**
   * width
   */
  protected int width;

  /**
   * minWidth
   */
  protected int minWidth = 15;

  /**
   * preferredWidth
   */
  private int preferredWidth;

  /**
   * maxWidth
   */
  protected int maxWidth = Integer.MAX_VALUE;

  /**
   * headerRenderer
   */
  protected TableCellRenderer headerRenderer;

  /**
   * headerValue
   */
  protected Object headerValue;

  /**
   * cellRenderer
   */
  protected TableCellRenderer cellRenderer;

  /**
   * cellEditor
   */
  protected TableCellEditor cellEditor;

  /**
   * isResizable
   */
  protected boolean isResizable = true;

  /**
   * resizedPostingDisableCount
   *
   * @deprecated 1.3
   */
  protected transient int resizedPostingDisableCount;

  /**
   * changeSupport
   */
  private SwingPropertyChangeSupport changeSupport =
    new SwingPropertyChangeSupport(this);

  /**
   * Constructor TableColumn
   */
  public TableColumn()
  {
    this(0, 75, null, null);
  }

  /**
   * Constructor TableColumn
   * 
   * @param modelIndex the index of the column in the model
   */
  public TableColumn(int modelIndex)
  {
    this(modelIndex, 75, null, null);
  }

  /**
   * Constructor TableColumn
   * 
   * @param modelIndex the index of the column in the model
   * @param width the width
   */
  public TableColumn(int modelIndex, int width)
  {
    this(modelIndex, width, null, null);
  }

  /**
   * Constructor TableColumn
   * 
   * @param modelIndex the index of the column in the model
   * @param width the width
   * @param cellRenderer the cell renderer
   * @param cellEditor the cell editor
   */
  public TableColumn(int modelIndex, int width,
                     TableCellRenderer cellRenderer, TableCellEditor cellEditor)
  {
    this.modelIndex = modelIndex;
    this.width = width;
    this.preferredWidth = width;
    this.cellRenderer = cellRenderer;
    this.cellEditor = cellEditor;
    this.headerValue = null;
    this.identifier = null;
  }

  /**
   * firePropertyChange
   * 
   * @param property the name of the property
   * @param oldValue the old value
   * @param newValue the new value
   */
  private void firePropertyChange(String property, Object oldValue,
                                  Object newValue)
  {
    changeSupport.firePropertyChange(property, oldValue, newValue);
  }

  /**
   * firePropertyChange
   * 
   * @param property the name of the property
   * @param oldValue the old value
   * @param newValue the new value
   */
  private void firePropertyChange(String property, int oldValue, int newValue)
  {
    firePropertyChange(property, new Integer(oldValue), new Integer(newValue));
  }

  /**
   * firePropertyChange
   * 
   * @param property the name of the property 
   * @param oldValue the old value
   * @param newValue the new value
   */
  private void firePropertyChange(String property, boolean oldValue,
                                  boolean newValue)
  {
    firePropertyChange(property, Boolean.valueOf(oldValue),
		       Boolean.valueOf(newValue));
  }

  /**
   * setModelIndex
   * 
   * @param modelIndex the index to set
   */
  public void setModelIndex(int modelIndex)
  {
    this.modelIndex = modelIndex;
  }

  /**
   * getModelIndex
   * 
   * @return the model index
   */
  public int getModelIndex()
  {
    return modelIndex;
  }

  /**
   * setIdentifier
   * 
   * @param identifier the identifier
   */
  public void setIdentifier(Object identifier)
  {
    this.identifier = identifier;
  }

  /**
   * getIdentifier
   * 
   * @return the identifier
   */
  public Object getIdentifier()
  {
    if (identifier == null)
      return getHeaderValue();
    return identifier;
  }

  /**
   * setHeaderValue
   * 
   * @param headerValue the value of the header
   */
  public void setHeaderValue(Object headerValue)
  {
    if (this.headerValue == headerValue)
      return;
    
    Object oldValue = this.headerValue;
    this.headerValue = headerValue;
    firePropertyChange(HEADER_VALUE_PROPERTY, oldValue, headerValue);
  }

  /**
   * getHeaderValue
   * 
   * @return the value of the header
   */
  public Object getHeaderValue()
  {
    return headerValue;
  }

  /**
   * setHeaderRenderer
   * 
   * @param headerRenderer the renderer to se
   */
  public void setHeaderRenderer(TableCellRenderer renderer)
  {
    if (headerRenderer == renderer)
      return;
    
    TableCellRenderer oldRenderer = headerRenderer;
    headerRenderer = renderer;
    firePropertyChange(HEADER_RENDERER_PROPERTY, 
		       oldRenderer, headerRenderer);
  }

  /**
   * getHeaderRenderer
   * @return TableCellRenderer
   */
  public TableCellRenderer getHeaderRenderer()
  {
    return headerRenderer;
  }

  /**
   * setCellRenderer
   * 
   * @param cellRenderer the cell renderer
   */
  public void setCellRenderer(TableCellRenderer renderer)
  {
    if (cellRenderer == renderer)
      return;
    
    TableCellRenderer oldRenderer = cellRenderer;
    cellRenderer = renderer;
    firePropertyChange(CELL_RENDERER_PROPERTY, 
		       oldRenderer, cellRenderer);
  }

  /**
   * getCellRenderer
   * 
   * @return the cell renderer
   */
  public TableCellRenderer getCellRenderer()
  {
    return cellRenderer;
  }

  /**
   * setCellEditor
   * 
   * @param cellEditor the cell editor
   */
  public void setCellEditor(TableCellEditor cellEditor)
  {
    this.cellEditor = cellEditor;
  }

  /**
   * getCellEditor
   * 
   * @return the cell editor
   */
  public TableCellEditor getCellEditor()
  {
    return cellEditor;
  }

  /**
   * setWidth
   * 
   * @param newWidth the width
   */
  public void setWidth(int newWidth)
  {
    int	oldWidth = width;

    if (newWidth < minWidth)
      width = minWidth;
    else if (newWidth > maxWidth)
      width = maxWidth;
    else
      width = newWidth;

    if (width == oldWidth)
      return;

    firePropertyChange(COLUMN_WIDTH_PROPERTY, oldWidth, width);
  }

  /**
   * getWidth
   * 
   * @return int
   */
  public int getWidth()
  {
    return width;
  }

  /**
   * setPreferredWidth
   * 
   * @param preferredWidth the preferred width
   */
  public void setPreferredWidth(int preferredWidth)
  {
    if (preferredWidth < minWidth)
      this.preferredWidth = minWidth;
    else if (preferredWidth > maxWidth)
      this.preferredWidth = maxWidth;
    else
      this.preferredWidth = preferredWidth;
  }

  /**
   * getPreferredWidth
   * 
   * @return the preferred width
   */
  public int getPreferredWidth()
  {
    return preferredWidth;
  }

  /**
   * setMinWidth
   * 
   * @param minWidth the minium width
   */
  public void setMinWidth(int minWidth)
  {
    this.minWidth = minWidth;
    setWidth(getWidth());
    setPreferredWidth(getPreferredWidth());
  }

  /**
   * getMinWidth
   * 
   * @return the minimum width
   */
  public int getMinWidth()
  {
    return minWidth;
  }

  /**
   * setMaxWidth
   * 
   * @param maxWidth the maximum width
   */
  public void setMaxWidth(int maxWidth)
  {
    this.maxWidth = maxWidth;
    setWidth(getWidth());
    setPreferredWidth(getPreferredWidth());
  }

  /**
   * getMaxWidth
   * @return the maximim width
   */
  public int getMaxWidth()
  {
    return maxWidth;
  }

  /**
   * setResizable
   * 
   * @param isResizable <code>true</code> if this column is resizable,
   * <code>false</code> otherwise
   */
  public void setResizable(boolean isResizable)
  {
    this.isResizable = isResizable;
  }

  /**
   * getResizable
   * 
   * @return <code>true</code> if this column is resizable,
   * <code>false</code> otherwise
   */
  public boolean getResizable()
  {
    return isResizable;
  }

  /**
   * sizeWidthToFit
   */
  public void sizeWidthToFit()
  {
    // TODO
  }

  /**
   * disableResizedPosting
   *
   * @deprecated 1.3
   */
  public void disableResizedPosting()
  {
    // Does nothing
  }

  /**
   * enableResizedPosting
   *
   * @deprecated 1.3
   */
  public void enableResizedPosting()
  {
    // Does nothing
  }

  /**
   * addPropertyChangeListener
   * @param listener the listener to all
   */
  public synchronized void addPropertyChangeListener(PropertyChangeListener listener)
  {
    changeSupport.addPropertyChangeListener(listener);
  }

  /**
   * removePropertyChangeListener
   * @param listener the listener to remove
   */
  public synchronized void removePropertyChangeListener(PropertyChangeListener listener)
  {
    changeSupport.removePropertyChangeListener(listener);
  }

  /**
   * @since 1.4
   */
  public PropertyChangeListener[] getPropertyChangeListeners()
  {
    return changeSupport.getPropertyChangeListeners();
  }

  /**
   * createDefaultHeaderRenderer
   * @return TableCellRenderer
   */
  protected TableCellRenderer createDefaultHeaderRenderer()
  {
    return new DefaultTableCellRenderer();
  }
}