Sheet Doesn't Attach Itself To Window
-
Hello,
I'm trying to display a sheet in Leopard but I've run into a peculiar
situation, for which I cannot find anyone who has shared a similar
experience. I can display a sheet but it is not attached to the
window. When the sheet appears (i.e. it just shows up, no animation)
it is properly centered on its window. I can click on the title bar of
the owner window and move that window around but the sheet remains in
its original location. If anyone could advise me on how to correct the
problem, I'd greatly appreciate it.
I call NSApp's
beginSheet:modalForWindow:modalDelegate:didEndSelector:contextInfo:
method. I've verified that no nil values, other than contextInfo are
being passed to the method. The code that displays the sheet is as
follows:
[NSApp beginSheet:self.sheetWindowController.window
modalForWindow:self.window
modalDelegate:self
didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:)
contextInfo:nil];
[NSApp runModalForWindow:self.sheetWindowController.window];
The sheetWindowController property's body is as follows. Note that
sheetWindowController is an instance variable.
if (sheetWindowController == nil)
{
sheetWindowController = [[SheetWindowController alloc] init];
if (editStudentWindowController == nil)
{
NSLog(@"Failed to load the nib file \"TheSheet\"");
}
}
return editStudentWindowController;
The init method for SheetWindowController loads the nib file with the
following code:
- (id)init
{
if ((self = [super initWithWindowNibName:@"TheSheet"]))
{
// TODO: Add code once this starts working!
}
return self;
}
The nib files seem to be wired up properly and the code seems to load
everything properly as the sheet does actually appear, just not
attached to the window.
If someone could point out my error or advise me to more advanced
debugging techniques to find the error, I would greatly appreciate it.
Thanks in advance,
Brian -
>
> [NSApp beginSheet:self.sheetWindowController.window
> modalForWindow:self.window
> modalDelegate:self
> didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:)
> contextInfo:nil];
> [NSApp runModalForWindow:self.sheetWindowController.window];
>
What you are doing here is first begin a sheet for you sheetWindow,
and directly after that you start a modal session for the same window
(see the docs for the distinction between a sheet and a modal window).
If you remove the second method call, everything should be fine.
Cheers, Patrick -
>> [NSApp beginSheet:self.sheetWindowController.window
>> modalForWindow:self.window
>> modalDelegate:self
>> didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:)
>> contextInfo:nil];
>> [NSApp runModalForWindow:self.sheetWindowController.window];
>>
>
> What you are doing here is first begin a sheet for you sheetWindow,
> and directly after that you start a modal session for the same
> window (see the docs for the distinction between a sheet and a modal
> window). If you remove the second method call, everything should be
> fine.
Thanks for your reply. Originally I didn't call runModalForWindow: and
in this case the sheet was still not attached to the window. Because I
was not calling it, it was possible for the user to drag the window to
a different location. If this event happens, the sheet remains in its
original position where it was initially shown and the controls in the
owning window still respond to events with the sheet displayed
elsewhere on the screen! Calling this method was just a workaround
disabling the for the still responsive sheet owning window. -
> The sheetWindowController property's body is as follows. Note that
> sheetWindowController is an instance variable.
>
> if (sheetWindowController == nil)
> {
> sheetWindowController = [[SheetWindowController alloc] init];
>
> if (editStudentWindowController == nil)
> {
> NSLog(@"Failed to load the nib file \"TheSheet\"");
> }
> }
>
> return editStudentWindowController;
Ok, now I had a look at the rest of your code: is the use of both
"sheetWindowController" and "editStudentWindowController" deliberate?
Patrick -
No, sorry, that was a typo. editStudentWindowController should be
renamed to sheetWindowController. That was an oversight in stripping
out all the irreverent code and I apologize.
Brian
On Nov 28, 2007, at 3:49 PM, PGM wrote:
> Ok, now I had a look at the rest of your code: is the use of both
> "sheetWindowController" and "editStudentWindowController" deliberate?
-
Hello all,
I have some new information that may be relevant. Now that I've
removed the runModalForWindow: method, I can display the sheet after
it has been dismissed. When I initially display the sheet, it is still
not attached to the window and still not modal for the window.
However, on subsequent shows its works properly. Any ideas on why the
first run doesn't work correctly?
Thanks in advance,
Brian
On Nov 28, 2007, at 2:53 PM, Brian T. Kelley wrote:
> Hello,
>
> I'm trying to display a sheet in Leopard but I've run into a
> peculiar situation, for which I cannot find anyone who has shared a
> similar experience. I can display a sheet but it is not attached to
> the window. When the sheet appears (i.e. it just shows up, no
> animation) it is properly centered on its window. I can click on the
> title bar of the owner window and move that window around but the
> sheet remains in its original location. If anyone could advise me on
> how to correct the problem, I'd greatly appreciate it.
>
> I call NSApp's
> beginSheet:modalForWindow:modalDelegate:didEndSelector:contextInfo:
> method. I've verified that no nil values, other than contextInfo are
> being passed to the method. The code that displays the sheet is as
> follows:
>
> [NSApp beginSheet:self.sheetWindowController.window
> modalForWindow:self.window
> modalDelegate:self
> didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:)
> contextInfo:nil];
> //[NSApp runModalForWindow:self.sheetWindowController.window];
>
>
> The sheetWindowController property's body is as follows. Note that
> sheetWindowController is an instance variable.
>
> if (sheetWindowController == nil)
> {
> sheetWindowController = [[SheetWindowController alloc] init];
>
> if (sheetWindowController == nil)
> {
> NSLog(@"Failed to load the nib file \"TheSheet\"");
> }
> }
>
> return editStudentWindowController;
>
> The init method for SheetWindowController loads the nib file with
> the following code:
>
> - (id)init
> {
> if ((self = [super initWithWindowNibName:@"TheSheet"]))
> {
> // TODO: Add code once this starts working!
> }
>
> return self;
> }
>
> The nib files seem to be wired up properly and the code seems to
> load everything properly as the sheet does actually appear, just not
> attached to the window.
>
> If someone could point out my error or advise me to more advanced
> debugging techniques to find the error, I would greatly appreciate it.
>
> Thanks in advance,
> Brian
