On Jul 20, 2012, at 07:13 PM, Markus Spoettl <ms_li...@shiftoption.com> wrote:
> On 7/20/12 6:28 PM, Martin Hewitson wrote:
>> Dear list,
>>
>> In my app I have a user action which allows them to select a particular line
>> in a PDFView. The relevant method (on my PDFView subclass) looks like this.
>>
>> - (void)displayLineAtPoint:(NSPoint)point inPageAtIndex:(NSUInteger)pageIndex
>> {
>> if (pageIndex < [[self document] pageCount]) {
>> [[self window] makeFirstResponder:self];
>> PDFPage *page = [[self document] pageAtIndex:pageIndex];
>> PDFSelection *sel = [page selectionForLineAtPoint:point];
>> [self performSelectorOnMainThread:@selector(goToPage:) withObject:page
>> waitUntilDone:YES];
>> [self setCurrentSelection:sel];
>> [self scrollSelectionToVisible:self];
>> [self display];
>> [self setCurrentSelection:nil];
>> [self performSelector:@selector(setCurrentSelectionAndAnimate:)
>> withObject:sel afterDelay:0.2];
>> }
>> }
>
> [self performSelectorOnMainThread:@selector(goToPage:) withObject:page
> waitUntilDone:YES];
>
> looks suspicious. If you're doing this on a secondary thread (which this line
> implies), I'm pretty sure that at least the call to -makeFirstResponder: is
> illegal (main thread only). Not sure about the PDF document class.
No, it's all done on the main thread. Actually, using
performSelectorOnMainThread... was just an attempt to get the thing to behave
properly. Nominally I'm just calling -setCurrentSelectionAndAnimate: directly.
The results are the same.
Cheers,
Martin
>
> Regards
> Markus
> --
> __________________________________________
> Markus Spoettl
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Hewitson
Albert-Einstein-Institut
Max-Planck-Institut fuer
Gravitationsphysik und Universitaet Hannover
Callinstr. 38, 30167 Hannover, Germany
Tel: +49-511-762-17121, Fax: +49-511-762-5861
E-Mail: martin.hewit...@aei.mpg.de
WWW: http://www.aei.mpg.de/~hewitson
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