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.
With the window containing my DriftView not obscured, hiding and reactivating
the app produces:
1. a nice rect:
2013-09-28 14:45:15.678 EnTeP[95278:303] -[DriftView drawRect:] backtrace 27
frames
0 EnTeP 0x000000010003c5c7 -[DriftView
drawRect:] + 135
1 AppKit 0x00007fff8d0f2064 -[NSView
_drawRect:clip:] + 4217
2 AppKit 0x00007fff8d0f06c1 -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1656
3 AppKit 0x00007fff8d0f0ad9 -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704
4 AppKit 0x00007fff8d0f0ad9 -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704
5 AppKit 0x00007fff8d0f0ad9 -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704
6 AppKit 0x00007fff8d0f0ad9 -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704
7 AppKit 0x00007fff8d0ee6f2 -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 817
8 AppKit 0x00007fff8d0ee143 -[NSThemeFrame
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 314
9 AppKit 0x00007fff8d0e9d6d -[NSView
_displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 4675
10 AppKit 0x00007fff8d0b3c93 -[NSView
displayIfNeeded] + 1830
11 AppKit 0x00007fff8d170a18 -[NSWindow
_reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1377
12 AppKit 0x00007fff8d170038 -[NSWindow
_doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 940
13 AppKit 0x00007fff8d16fc1f -[NSWindow
orderWindow:relativeTo:] + 159
14 AppKit 0x00007fff8d686521 -[NSWindow
_tempHide:relWin:] + 282
15 AppKit 0x00007fff8d193585 -[NSApplication
_doUnhideWithoutActivation] + 463
16 AppKit 0x00007fff8d193340 _hideShowHandler +
117
17 HIToolbox 0x00007fff8b867d1a
_ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec
+ 1206
18 HIToolbox 0x00007fff8b8671e9
_ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec
+ 410
19 HIToolbox 0x00007fff8b87cfc9
SendEventToEventTarget + 40
20 AppKit 0x00007fff8d0b0616 _DPSNextEvent + 912
21 AppKit 0x00007fff8d0afdf2 -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
22 AppKit 0x00007fff8d0a71a3 -[NSApplication run]
+ 517
23 AppKit 0x00007fff8d04bbd6 NSApplicationMain +
869
24 EnTeP 0x0000000100037e92 main + 34
25 EnTeP 0x0000000100001404 start + 52
26 ??? 0x0000000000000003 0x0 + 3
2013-09-28 14:45:15.791 EnTeP[95278:303] -[DriftView drawRect:] 0x104c23140
nice rect {{0, 0}, {1393, 189}}; visibleRect {{0, 0}, {1393, 189}}
2. immediately followed by 1-pixel rect:
2013-09-28 14:45:15.859 EnTeP[95278:303] -[DriftView drawRect:] backtrace 26
frames
0 EnTeP 0x000000010003c5c7 -[DriftView
drawRect:] + 135
1 AppKit 0x00007fff8d0f2140 -[NSView
_drawRect:clip:] + 4437
2 AppKit 0x00007fff8d0eefb3 -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 3058
3 AppKit 0x00007fff8d0efa44 -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 5763
4 AppKit 0x00007fff8d0efa44 -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 5763
5 AppKit 0x00007fff8d0efa44 -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 5763
6 AppKit 0x00007fff8d0efa44 -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 5763
7 AppKit 0x00007fff8d0ee143 -[NSThemeFrame
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
+ 314
8 AppKit 0x00007fff8d0e9d6d -[NSView
_displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 4675
9 AppKit 0x00007fff8d0b3c93 -[NSView
displayIfNeeded] + 1830
10 AppKit 0x00007fff8d0b31cc
_handleWindowNeedsDisplayOrLayoutOrUpdateConstraints + 738
11 AppKit 0x00007fff8d67e901 __83-[NSWindow
_postWindowNeedsDisplayOrLayoutOrUpdateConstraintsUnlessPostingDisabled]_block_invoke_01208
+ 46
12 CoreFoundation 0x00007fff8c7bb417
__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
13 CoreFoundation 0x00007fff8c7bb381
__CFRunLoopDoObservers + 369
14 CoreFoundation 0x00007fff8c7967b8 __CFRunLoopRun + 728
15 CoreFoundation 0x00007fff8c7960e2 CFRunLoopRunSpecific
+ 290
16 HIToolbox 0x00007fff8b88eeb4
RunCurrentEventLoopInMode + 209
17 HIToolbox 0x00007fff8b88eb94
ReceiveNextEventCommon + 166
18 HIToolbox 0x00007fff8b88eae3
BlockUntilNextEventMatchingListInMode + 62
19 AppKit 0x00007fff8d0b0533 _DPSNextEvent + 685
20 AppKit 0x00007fff8d0afdf2 -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
21 AppKit 0x00007fff8d0a71a3 -[NSApplication run]
+ 517
22 AppKit 0x00007fff8d04bbd6 NSApplicationMain +
869
23 EnTeP 0x0000000100037e92 main + 34
24 EnTeP 0x0000000100001404 start + 52
25 ??? 0x0000000000000003 0x0 + 3
2013-09-28 14:45:15.868 EnTeP[95278:303] -[DriftView drawRect:] 0x104c23140
Ignore very small rect {{0, 0}, {1, 1}}; visibleRect {{0, 0}, {1393, 189}}
No idea why this 4-fold recursion to draw my view.
Gerriet.
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