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/* TableColumnModel.java --

   Copyright (C) 2002, 2004, 2005, 2006,  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

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General Public License for more details.

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02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

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As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

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independent module, the terms and conditions of the license of that

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package javax.swing.table;

import java.util.Enumeration;

import javax.swing.JTable;

import javax.swing.ListSelectionModel;

import javax.swing.event.ChangeEvent;

import javax.swing.event.TableColumnModelEvent;

import javax.swing.event.TableColumnModelListener;

/**

 * The interface used by {@link JTable} to access the columns in the table

 * view.

 *

 * @author Andrew Selkirk

 */

public interface TableColumnModel

{

  /**

   * Adds a column to the model.

   *

   * @param column  the new column (<code>null</code> not permitted).

   *

   * @throws IllegalArgumentException if <code>column</code> is

   *         <code>null</code>.

   */

  void addColumn(TableColumn column);

  /**

   * Removes a column from the model.  If <code>column</code> is not defined

   * in the model, this method does nothing.

   *

   * @param column TableColumn

   */

  void removeColumn(TableColumn column);

  /**

   * Moves a column.

   *

   * @param columnIndex Index of column to move

   * @param newIndex New index of column

   */

  void moveColumn(int columnIndex, int newIndex);

  /**

   * Sets the column margin and sends a {@link ChangeEvent} to all registered

   * {@link TableColumnModelListener}s registered with the model.

   *

   * @param margin  the column margin.

   *

   * @see #getColumnMargin()

   */

  void setColumnMargin(int margin);

  /**

   * Returns the number of columns in the model.

   *

   * @return The column count.

   */

  int getColumnCount();

  /**

   * Returns an enumeration of the columns in the model.

   *

   * @return An enumeration of the columns in the model.

   */

  Enumeration<TableColumn> getColumns();

  /**

   * Returns the index of the {@link TableColumn} with the given identifier.

   *

   * @param identifier  the identifier (<code>null</code> not permitted).

   *

   * @return The index of the {@link TableColumn} with the given identifier.

   *

   * @throws IllegalArgumentException if <code>identifier</code> is

   *         <code>null</code> or there is no column with that identifier.

   */

  int getColumnIndex(Object identifier);

  /**

   * Returns the <code>TableColumn</code> at the specified index.

   *

   * @param columnIndex  the column index.

   *

   * @return The table column.

   */

  TableColumn getColumn(int columnIndex);

  /**

   * Returns the column margin.

   *

   * @return The column margin.

   *

   * @see #setColumnMargin(int)

   */

  int getColumnMargin();

  /**

   * Returns the index of the column that contains the specified x-coordinate,

   * assuming that:

   * <ul>

   * <li>column zero begins at position zero;</li>

   * <li>all columns appear in order;</li>

   * <li>individual column widths are taken into account, but the column margin

   *     is ignored.</li>

   * </ul>

   * If no column contains the specified position, this method returns

   * <code>-1</code>.

   *

   * @param xPosition  the x-position.

   *

   * @return The column index, or <code>-1</code>.

   */

  int getColumnIndexAtX(int xPosition);

  /**

   * Returns total width of all the columns in the model, ignoring the

   * column margin (see {@link #getColumnMargin()}).

   *

   * @return The total width of all the columns.

   */

  int getTotalColumnWidth();

  /**

   * Sets the flag that indicates whether or not column selection is allowed.

   *

   * @param allowed  the new flag value.

   *

   * @see #getColumnSelectionAllowed()

   */

  void setColumnSelectionAllowed(boolean allowed);

  /**

   * Returns <code>true</code> if column selection is allowed, and

   * <code>false</code> if column selection is not allowed.

   *

   * @return A boolean.

   *

   * @see #setColumnSelectionAllowed(boolean)

   */

  boolean getColumnSelectionAllowed();

  /**

   * getSelectedColumns

   * @return Selected columns

   */

  int[] getSelectedColumns();

  /**

   * Returns the number of selected columns in the model.

   *

   * @return The selected column count.

   *

   * @see #getSelectionModel()

   */

  int getSelectedColumnCount();

  /**

   * Sets the selection model that will be used to keep track of the selected

   * columns.

   *

   * @param model  the selection model (<code>null</code> not permitted).

   *

   * @throws IllegalArgumentException if <code>model</code> is

   *     <code>null</code>.

   */

  void setSelectionModel(ListSelectionModel model);

  /**

   * Returns the selection model used to track table column selections.

   *

   * @return The selection model.

   *

   * @see #setSelectionModel(ListSelectionModel)

   */

  ListSelectionModel getSelectionModel();

  /**

   * Registers a listener with the model, so that it will receive

   * {@link TableColumnModelEvent} notifications.

   *

   * @param listener the listener (<code>null</code> ignored).

   */

  void addColumnModelListener(TableColumnModelListener listener);

  /**

   * Deregisters a listener, so that it will no longer receive

   * {@link TableColumnModelEvent} notifications.

   *

   * @param listener  the listener.

   */

  void removeColumnModelListener(TableColumnModelListener listener);

}