On 28 Sep 2013, at 14:18, Quincey Morris <quinceymor...@rivergatesoftware.com>
wrote:
> On Sep 27, 2013, at 23:39 , "Gerriet M. Denkmann" <gerr...@mdenkmann.de>
> wrote:
>
>> My CustomView (aka DriftView) has no subviews at all. It only has a
>> superview: the ScrollView.
>
> What I was trying to draw your attention to is that the backtrace tells you
> that the dirty region is complex (i.e. not a simple rectangle) in that
> scenario. Complex enough that it required 4 levels of recursion to produce
> the 1-pixel update rect.
>
> If this is not the result of what's inside the view, then it presumably
> results from what is over the view -- there may be invisible windows (not
> necessarily belonging to your app) or something along that line.
> Or perhaps you're using 3rd-party code that does a setNeedsDisplayInRect with
> that small rect for some hinky reason of its own.
No, this is not the case.
> The fact that the dirty region ends up being like this is essentially an
> implementation detail, not an indication of anything wrong, or of any state
> that you need to be aware of.
Right now there is another window completely obscuring the window with the
DriftView.
And I managed to reproduce the small rect:
- hide the app
- make the app active again (clicking the Dock-Icon)
This produces:
2013-09-28 14:26:55.528 -- -[DriftView drawRect:] nice rect {{0, 0}, {1393,
189}}; visibleRect {{0, 0}, {1393, 189}}
2013-09-28 14:26:55.565 -- -[DriftView drawRect:] Ignore very small rect {{0,
0}, {1, 1}}; visibleRect {{0, 0}, {1393, 189}}
Strange.
But you are probably right and I should just ignore this.
Kind regards
Gerriet.
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