TableColumnModel


1   /*
2    * @(#)TableColumnModel.java    1.25 04/05/05
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   
8   package javax.swing.table;
9   
10  import java.util.Enumeration  ;
11  import javax.swing.event.ChangeEvent  ;
12  import javax.swing.event.*;
13  import javax.swing.*;
14  
15  
16  /**
17   * Defines the requirements for a table column model object suitable for
18   * use with <code>JTable</code>.
19   *
20   * @version 1.25 05/05/04
21   * @author Alan Chung
22   * @author Philip Milne
23   * @see DefaultTableColumnModel
24   */
25  public interface TableColumnModel
26  {
27  //
28  // Modifying the model
29  //
30  
31      /**
32       *  Appends <code>aColumn</code> to the end of the
33       *  <code>tableColumns</code> array.
34       *  This method posts a <code>columnAdded</code>
35       *  event to its listeners.
36       *
37       * @param   aColumn         the <code>TableColumn</code> to be added
38       * @see     #removeColumn
39       */
40      public void addColumn(TableColumn   aColumn);
41  
42      /**
43       *  Deletes the <code>TableColumn</code> <code>column</code> from the 
44       *  <code>tableColumns</code> array.  This method will do nothing if 
45       *  <code>column</code> is not in the table's column list.
46       *  This method posts a <code>columnRemoved</code>
47       *  event to its listeners.
48       *
49       * @param   column          the <code>TableColumn</code> to be removed
50       * @see     #addColumn
51       */
52      public void removeColumn(TableColumn   column);
53      
54      /**
55       * Moves the column and its header at <code>columnIndex</code> to
56       * <code>newIndex</code>.  The old column at <code>columnIndex</code>
57       * will now be found at <code>newIndex</code>.  The column that used
58       * to be at <code>newIndex</code> is shifted left or right
59       * to make room.  This will not move any columns if
60       * <code>columnIndex</code> equals <code>newIndex</code>.  This method 
61       * posts a <code>columnMoved</code> event to its listeners.
62       *
63       * @param   columnIndex                     the index of column to be moved
64       * @param   newIndex                        index of the column's new location
65       * @exception IllegalArgumentException      if <code>columnIndex</code> or 
66       *                                          <code>newIndex</code>
67       *                                          are not in the valid range
68       */
69      public void moveColumn(int columnIndex, int newIndex);
70  
71      /**
72       * Sets the <code>TableColumn</code>'s column margin to
73       * <code>newMargin</code>.  This method posts
74       * a <code>columnMarginChanged</code> event to its listeners.
75       *
76       * @param   newMargin       the width, in pixels, of the new column margins
77       * @see     #getColumnMargin
78       */
79      public void setColumnMargin(int newMargin);
80      
81  //
82  // Querying the model
83  //
84  
85      /** 
86       * Returns the number of columns in the model.
87       * @return the number of columns in the model
88       */
89      public int getColumnCount();
90      
91      /** 
92       * Returns an <code>Enumeration</code> of all the columns in the model.
93       * @return an <code>Enumeration</code> of all the columns in the model
94       */
95      public Enumeration  <TableColumn  > getColumns();
96  
97      /**
98       * Returns the index of the first column in the table
99       * whose identifier is equal to <code>identifier</code>,
100      * when compared using <code>equals</code>.
101      *
102      * @param           columnIdentifier        the identifier object
103      * @return          the index of the first table column
104      *                  whose identifier is equal to <code>identifier</code>
105      * @exception IllegalArgumentException      if <code>identifier</code>
106      *              is <code>null</code>, or no
107      *              <code>TableColumn</code> has this
108      *              <code>identifier</code>
109      * @see             #getColumn
110      */
111     public int getColumnIndex(Object   columnIdentifier);
112 
113     /**
114      * Returns the <code>TableColumn</code> object for the column at
115      * <code>columnIndex</code>.
116      *
117      * @param   columnIndex     the index of the desired column 
118      * @return  the <code>TableColumn</code> object for
119      *              the column at <code>columnIndex</code>
120      */
121     public TableColumn   getColumn(int columnIndex);
122 
123     /** 
124      * Returns the width between the cells in each column. 
125      * @return the margin, in pixels, between the cells
126      */
127     public int getColumnMargin();
128     
129     /**
130      * Returns the index of the column that lies on the 
131      * horizontal point, <code>xPosition</code>;
132      * or -1 if it lies outside the any of the column's bounds.
133      *
134      * In keeping with Swing's separable model architecture, a
135      * TableColumnModel does not know how the table columns actually appear on
136      * screen.  The visual presentation of the columns is the responsibility
137      * of the view/controller object using this model (typically JTable).  The
138      * view/controller need not display the columns sequentially from left to
139      * right.  For example, columns could be displayed from right to left to
140      * accomodate a locale preference or some columns might be hidden at the
141      * request of the user.  Because the model does not know how the columns
142      * are laid out on screen, the given <code>xPosition</code> should not be
143      * considered to be a coordinate in 2D graphics space.  Instead, it should
144      * be considered to be a width from the start of the first column in the
145      * model.  If the column index for a given X coordinate in 2D space is
146      * required, <code>JTable.columnAtPoint</code> can be used instead.
147      *
148      * @return  the index of the column; or -1 if no column is found
149      * @see javax.swing.JTable#columnAtPoint
150      */
151     public int getColumnIndexAtX(int xPosition);
152     
153     /** 
154      * Returns the total width of all the columns. 
155      * @return the total computed width of all columns
156      */
157     public int getTotalColumnWidth();
158 
159 //
160 // Selection
161 //
162 
163     /**
164      * Sets whether the columns in this model may be selected.
165      * @param flag   true if columns may be selected; otherwise false
166      * @see #getColumnSelectionAllowed
167      */
168     public void setColumnSelectionAllowed(boolean flag);
169 
170     /**
171      * Returns true if columns may be selected.
172      * @return true if columns may be selected
173      * @see #setColumnSelectionAllowed
174      */
175     public boolean getColumnSelectionAllowed();
176 
177     /**
178      * Returns an array of indicies of all selected columns.
179      * @return an array of integers containing the indicies of all
180      *      selected columns; or an empty array if nothing is selected
181      */
182     public int[] getSelectedColumns();
183 
184     /**
185      * Returns the number of selected columns.
186      *
187      * @return the number of selected columns; or 0 if no columns are selected
188      */
189     public int getSelectedColumnCount();
190 
191     /**
192      * Sets the selection model.
193      *
194      * @param newModel  a <code>ListSelectionModel</code> object
195      * @see #getSelectionModel
196      */
197     public void setSelectionModel(ListSelectionModel newModel); 
198     
199     /**
200      * Returns the current selection model.
201      *
202      * @return a <code>ListSelectionModel</code> object 
203      * @see #setSelectionModel
204      */
205     public ListSelectionModel getSelectionModel(); 
206     
207 //
208 // Listener
209 //
210 
211     /**
212      * Adds a listener for table column model events.
213      *
214      * @param x  a <code>TableColumnModelListener</code> object
215      */
216     public void addColumnModelListener(TableColumnModelListener x);
217 
218     /**
219      * Removes a listener for table column model events.
220      *
221      * @param x  a <code>TableColumnModelListener</code> object
222      */
223     public void removeColumnModelListener(TableColumnModelListener x);
224 }
225
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