As we continue to work with our AddressBook application, this time adding sheets, what are your comments?
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Showing messages 1 through 8 of 8.

• DataSource Methods
  2007-07-13 14:16:01  wmKanoff [Reply | View]
  
  
  The Methods used to edit the fields in the NSTableView fails.
  
  Using the Downloaded copy of AddressBook 2, 3, and 4 I found the following:
  
  2007-07-13 14:12:12.432 AddressBook[737] Exception raised during posting of notification. Ignored. exception: *** -[NSCFDictionary setObject:forKey:]: mutating method sent to immutable object
  
  I am new to Cocoa and do not quite understand the error?

• Java Version - Solution
  2002-06-02 19:53:46  jsumnertx [Reply | View]
  
  
  Here's the Java solution to this example. I've only included the code that has changed since the last exercise.
  
  Notes:
  1) Creating a selector is different in Java.
  2) NSApp variable doesn't exist but it's easy enough to derive...
  -----
  
  public void deleteRecord(Object sender) { /* IBAction */
  String title = "Warning";
  String defaultButton = "Delete";
  String alternateButton = "Don't Delete";
  String otherButton = null;
  String message = "Are you sure you want to delete the selected record(s)?";
  
  // here's how to make a selector in Java
  NSSelector sel = new NSSelector("sheetDidEnd", new Class[] {NSWindow.class, int.class, Object.class} );
  
  if (tableView.numberOfSelectedRows() == 0)
  return;
  NSApplication.beep();
  NSAlertPanel.beginAlertSheet(title, defaultButton , alternateButton, otherButton, mainWindow, this, sel, null, null, message);
  
  }
  
  public void sheetDidEnd(NSWindow sheet, int returnCode, Object contextInfo)
  {
  if ( returnCode == NSAlertPanel.DefaultReturn ) {
  NSMutableArray tempArray = new NSMutableArray();
  NSEnumerator enumerator = tableView.selectedRowEnumerator();
  Integer item;
  item = (Integer)enumerator.nextElement();
  while ( item != null ) {
  tempArray.addObject(records.objectAtIndex(item.intValue()));
  item = (Integer)enumerator.nextElement();
  }
  records.removeObjectsInArray(tempArray);
  tableView.reloadData();
  saveData(records);
  }
  
  
  }
  
  
  public void openPrefsSheet(Object sender)
  {
  // NSApp variable doesn't appear to exist in Java. We can get it easily though
  NSApplication nsapp=NSApplication.sharedApplication();
  nsapp.beginSheet(prefsWindow, mainWindow, null, null, null);
  nsapp.runModalForWindow(prefsWindow);
  nsapp.endSheet(prefsWindow);
  prefsWindow.orderOut(this);
  }
  
  public void closePrefsSheet(Object sender)
  {
  NSApplication.sharedApplication().stopModal();
  }
  
  
• Java Version - Solution
  2004-04-25 19:14:10  raydreams [Reply | View]
  
  
  I'm glad this guy is posting Java Cocoa versions. Someone ragged him in a previous post for doing so. I say, keep 'em coming, dude.
  
  You know, when you look at the .NET documentation, MS provides examples at least in VB.NET and C#, and sometimes J# and Managed C++ as well. Why can't Apple do the same?

• A problem with the beginSheet exemple
  2001-12-26 03:24:43  juban [Reply | View]
  
  
  This is a very usefull article. Thank you for this help.
  
  However, there seems that the way you set-up sheets in your exemple didn't work for me.
  
  You wrote :
  
  - (IBAction)openPrefsSheet:(id)sender
  {
  [NSApp beginSheet:prefsWindow
  modalForWindow:mainWindow
  modalDelegate:nil
  didEndSelector:nil
  contextInfo:nil];
  
  [NSApp runModalForWindow:prefsWindow];
  
  [NSApp endSheet:prefsWindow];
  [prefsWindow orderOut:self];
  }
  
  - (IBAction)closePrefsSheet:(id)sender
  {
  [NSApp stopModal];
  }
  
  When I tried this with my application, the sheet didn't want to close.
  I tried to put a [prefsWindow close] statement before the [NSApp stopModal].
  It worked better, but then, two sheets were appearing successively.
  Finaly I tried this :
  
  - (IBAction)openPrefsSheet:(id)sender
  {
  [NSApp beginSheet:prefsWindow
  modalForWindow:mainWindow
  modalDelegate:nil
  didEndSelector:nil
  contextInfo:nil];
  }
  
  - (IBAction)closePrefsSheet:(id)sender
  {
  
  [NSApp endSheet:prefsWindow];
  [prefsWindow close];
  }
  
  I think that the runModalForWindow is not necessary for sheets because sheets are alredy modal windows.
  In all cases, sheets are going away only if there is a "close" statement (in my case).
  
  An other point is, if you have some updates to make to the window for which you want to attach a sheet,
  you have to send a "display" message to your window and call the NSBeginAlertSheet like this :
  
  NSBeginAlertSheet(title, defaultButton, alternateButton, otherButton, mainWindow, self, nil, @selector(sheetDidEnd:returnCode:contextInfo:), nil, message);
  
  If you don't do so, your sheet won't slide down nicely as expected.

• Extension: Sending email from Address Book
  2001-10-17 15:34:16  mikenidel [Reply | View]
  
  
  I've been sticking pretty closely to this tutorial so far, but I finally decided I felt intrepid enough to try extending the application a bit.
  
  Specifically, I wanted to be able to select a row or rows from the address book, click a button, and open an email with the right recipient(s) in the To: field. Turns out it isn't too hard, once I found out how to open a URL. Here's how I did it, feel free to add to or comment on this approach.
  
  In Interface Builder: Create an action in the Controller class called sendMail. Then add a button wherever you like and connect it to the controller, using the sendMail message as the target for the button. I added a "Send Email" button to the right of the "Delete" button in the main application window.
  
  Once you have that connected up, add the line
  
  
- (IBAction)sendMail:(id)sender;

  
  to your Controller.h file, and add the following code to the implementation in Controller.m:
  
  
- (IBAction)sendEmail:(id)sender
{
NSMutableString *url = [NSMutableString stringWithString:@"mailto:"];
NSString *str;
NSEnumerator *enumerator;
NSNumber *index;

enumerator = [tableView selectedRowEnumerator];

if((index = [enumerator nextObject])) {
str = [[records objectAtIndex:[index intValue]] objectForKey:@"Email"];
[url appendString:str];

while ( (index = [enumerator nextObject]) ) {
str = [[records objectAtIndex:[index intValue]] objectForKey:@"Email"];
[url appendString:@","];
[url appendString:str];
}
}
[[NSWorkspace sharedWorkspace] openURL: [NSURL URLWithString:url]];
}


  
  Note that if you're familiar with the mailto: URL format standard, you can make the new message open with a starting subject, body, and various other headers, using the query syntax. Try out "mailto:somebody@company.com?subject=MyApp&body=Hello" and find out more info about the mailto: URL options at
  
  http://www.faqs.org/rfcs/rfc2368.html
  
  Note that you have to encode any characters that aren't allowed in URLs - particularly blank spaces (%20) and such. I'm sure there are Cocoa methods to encode and decode URL strings, I just haven't found them yet.
  
  Good Luck!
  
  -schmeldog
• Extension: Sending email from Address Book
  2002-01-02 21:28:53  michele [Reply | View]
  
  
  Changed the code as follows :
  
  // For sending mail
  - (IBAction) sendMail: (id) sender
  {
  NSMutableString *url = [NSMutableString stringWithString: @"mailto:"];
  NSString *str;
  NSEnumerator *enumerator;
  NSNumber *index;
  
  // Check if there is a selected row
  if ([tableView numberOfSelectedRows] == 0)
  {
  return;
  }
  
  // Enumerate all selected rows
  enumerator = [tableView selectedRowEnumerator];
  
  // Traverse the selected rows with enumerator
  while ( ( index = [enumerator nextObject] ) )
  {
  // Retrieve the email field
  str = [[records objectAtIndex: [index intValue]]
  objectForKey: @"Email"];
  // Add a comma to separate email addresses if this is not the first one
  if (![url isEqualToString: @"mailto:"])
  {
  [url appendString: @","];
  }
  // Add the email address to the previously built string
  [url appendString: str];
  }
  
• Extension: Sending email from Address Book
  2001-10-26 12:07:56  rainwadj [Reply | View]
  
  
  This is a great addition. I figured out how to clean up the string. When the Send Mail button is clicked, I have another sheet open with fields for To: (which is filled in with the email addresses from the selected records), Cc:, Bcc: and Subject:, and buttons for Send and Cancel. The action for the Send button on the sheet invokes this method:
  
  - (IBAction)sendEmailMessage:(id)sender
  {
  NSMutableString *temp = [NSMutableString
  stringWithString:@"mailto:"];
  NSString *url;
  
  [temp appendString:[emailToField stringValue]];
  [temp appendString:@"?cc="];
  [temp appendString:[emailCcField stringValue]];
  [temp appendString:@"&bcc="];
  [temp appendString:[emailBccField stringValue]];
  [temp appendString:@"&subject="];
  [temp appendString:[emailSubjField stringValue]];
  
  url = (NSString *)
  CFURLCreateStringByAddingPercentEscapes
  (NULL, (CFStringRef)temp, NULL, NULL,
  kCFStringEncodingISOLatin1);
  
  [[NSWorkspace sharedWorkspace] openURL:
  [NSURL URLWithString:url]];
  
  [NSApp stopModal];
  }
  
  
  Everything gets put in the proper places in a new message window in Mail.app. Cool stuff.

• run executable?
  2001-10-06 10:22:58  psheldon [Reply | View]
  
  
  What was apple's reason for distinguishing run executable as a command in os x 10.1 developer's tools? In particular, I think this evidences that we might run something else (whatever that is) and this raw surprise may evidence something so fundamental as to not yet be documented safely yet . I would understand if Apple doesn't want to answer , sometimes I have to play with something, we all do before understanding reasons .
  Well, I thought simply asking the reason was brief enough to publish here .