1 /*

     2  * Copyright (c) 1995, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.awt;

    27 

    28 import java.awt.*;

    29 

    30 /**

    31  * FocusingTextField: a subclass of java.awt.TextField that handles moving the

    32  * input focus from field to field, as when the user hits 'return.'

    33  *

    34  * @author Herb Jellinek

    35  */

    36 

    37 public class FocusingTextField extends TextField {

    38 

    39     /** The field to move to on 'return' - can be null. */

    40     TextField next;

    41 

    42     /** If true, select the contents of the field when it gets the focus. */

    43     boolean willSelect;

    44 

    45     /**

    46      * Create a FocusingTextField.

    47      * @param cols number of columns of text.

    48      */

    49     public FocusingTextField(int cols) {

    50         super("", cols);

    51     }

    52 

    53     /**

    54      * Create a FocusingTextField.

    55      * @param cols number of columns of text.

    56      * @param willSelect if true, will select all contents of field when

    57      * focus is gained.

    58      */

    59     public FocusingTextField(int cols, boolean willSelect) {

    60         this(cols);

    61         this.willSelect = willSelect;

    62     }

    63 

    64     public void setWillSelect(boolean will) {

    65         willSelect = will;

    66     }

    67 

    68     public boolean getWillSelect() {

    69         return willSelect;

    70     }

    71 

    72     /**

    73      * Call this to set the next field to receive the input focus.

    74      * @param next the next TextField in order - can be null.

    75      */

    76     public void setNextField(TextField next) {

    77         this.next = next;

    78     }

    79 

    80     /**

    81      * We got the focus.  If willSelect is true, select everything.

    82      */

    83     public boolean gotFocus(Event e, Object arg) {

    84         if (willSelect) {

    85             select(0, getText().length());

    86         }

    87         return true;

    88     }

    89 

    90     /**

    91      * We lost the focus.  If willSelect is true, deselect everything.

    92      */

    93     public boolean lostFocus(Event e, Object arg) {

    94         if (willSelect) {

    95             select(0, 0);

    96         }

    97         return true;

    98     }

    99 

   100     /**

   101      * Pass the focus to the next guy, if any.

   102      */

   103     public void nextFocus() {

   104         if (next != null) {

   105             next.requestFocus();

   106         }

   107         super.nextFocus();

   108     }

   109 }