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.command;
32
33 import javax.microedition.lcdui.Display;
34 import javax.microedition.lcdui.Displayable;
35 import palmed.buffer.IBufferManager;
36 import palmed.buffer.IResult;
37 import palmed.ui.ConfirmationDialog;
38 import palmed.ui.ICommand;
39
40 /***
41 * This class implements the 'close' command.
42 *
43 * @author Mathieu Champlon
44 * @version $Revision$ $Date$
45 */
46 public final class CloseCommand implements ICommand
47 {
48 /***
49 * The display.
50 */
51 private final Display display_;
52 /***
53 * The buffer manager.
54 */
55 private final IBufferManager manager_;
56 /***
57 * The confirmation dialog.
58 */
59 private final Displayable confirmation_;
60
61 /***
62 * Create a close command.
63 *
64 * @param display the display
65 * @param manager the buffer manager
66 * @param result the result handler
67 */
68 public CloseCommand( final Display display, final IBufferManager manager, final IResult result )
69 {
70 if( display == null )
71 throw new IllegalArgumentException( "parameter 'display' is null" );
72 if( manager == null )
73 throw new IllegalArgumentException( "parameter 'manager' is null" );
74 display_ = display;
75 manager_ = manager;
76 confirmation_ = createCloseDialog( manager, result );
77 }
78
79 private Displayable createCloseDialog( final IBufferManager manager, final IResult result )
80 {
81 final CloseConfirmationListener listener = new CloseConfirmationListener( manager, result );
82 return new ConfirmationDialog( "Buffer Close Confirmation", "This buffer has been modified.",
83 "Are you sure you want to close it ?", listener );
84 }
85
86 /***
87 * {@inheritDoc}
88 */
89 public void execute()
90 {
91 if( !manager_.hasBeenModified() )
92 manager_.close();
93 else
94 display_.setCurrent( confirmation_ );
95 }
96 }