1 /***
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id$
29 */
30
31 package palmed.ui;
32
33 import javax.microedition.lcdui.Command;
34 import javax.microedition.lcdui.CommandListener;
35 import javax.microedition.lcdui.Displayable;
36 import javax.microedition.lcdui.TextField;
37
38 /***
39 * This dialog prompts the user for a string input.
40 *
41 * @author Mathieu Champlon
42 * @version $Revision$ $Date$
43 */
44 public class InputDialog extends Dialog implements CommandListener
45 {
46 /***
47 * The maximum number of characters in the input field.
48 */
49 private static final int INPUT_MAX_SIZE = 256;
50 /***
51 * The validation command.
52 */
53 private final Command okCommand_ = new Command( "Ok", Command.OK, 1 );
54 /***
55 * The cancelation command.
56 */
57 private final Command cancelCommand_ = new Command( "Cancel", Command.CANCEL, 1 );
58 /***
59 * The listener.
60 */
61 private final IInputListener listener_;
62 /***
63 * The input text field.
64 */
65 private final TextField text_;
66
67 /***
68 * Create a dialog for user input.
69 *
70 * @param title the form title
71 * @param description the message describing what the user has to enter
72 * @param listener the listener to receive user callbacks
73 */
74 public InputDialog( final String title, final String description, final IInputListener listener )
75 {
76 super( title );
77 if( listener == null )
78 throw new IllegalArgumentException( "parameter 'listener' is null" );
79 appendMessage( description );
80 text_ = new TextField( null, null, INPUT_MAX_SIZE, TextField.ANY );
81 append( text_ );
82 addCommand( okCommand_ );
83 addCommand( cancelCommand_ );
84 setCommandListener( this );
85 listener_ = listener;
86 }
87
88 /***
89 * {@inheritDoc}
90 */
91 public final void commandAction( final Command command, final Displayable displayable )
92 {
93 if( command == okCommand_ )
94 listener_.enter( text_.getString() );
95 else
96 listener_.cancel();
97 text_.setString( "" );
98 }
99 }