Re: Help: NSScrollView is resizing its documentView down to (0, 0)
Re: Help: NSScrollView is resizing its documentView down to (0, 0)
- Subject: Re: Help: NSScrollView is resizing its documentView down to (0, 0)
- From: email@hidden
- Date: Wed, 06 May 2015 09:58:39 +0900
If you have AutoLayout on in a window it's actually on for all views.
NSScrollView and its hierarchy are a bit weird though.
Thing to do is create height and width constraints for the document view and outlets for them so you can configure them. If you're using 10.10+ you can make them configurable in IB.
Then add a subview as your real document view.
For upper left corner origin you need to subclass NSClipView and return YES from an override of isFlipped.
Set the class in IB for both.
You also want to uncheck the item for translatesAutoresizingMasks
If that doesn't appear in IB you can set it in code or just return NO from a getter override.
Sent from my iPhone
> On 2015/05/06, at 1:26, Jens Alfke <email@hidden> wrote:
>
> I haven't done much AppKit work in a while. Right now I have a small app where I'm trying to do something very simple: put a custom NSView in a window and make it scrollable. The view determines its own frame size based on the content it needs to display. So all I did was create a new window in IB, add an instance of my view, embed it in an NSScrollView, and set up default constraints for the scroll view so it'll track the window size.
>
> It sort of works as long as the window is bigger than my custom view (although the view is pinned to the bottom of the window instead of the top for some reason.) But as soon as I resize the window to a height smaller than the custom view's, the view disappears and never comes back.
>
> I added an override of -setFrame: and found that my view's frame is being set to (0, 0, 0, 0) by AppKit while redisplaying the window. I have no idea why this is happening ― it probably has something to do with constraints, but I don't understand constraints well enough to know why (and I can't find any clear documentation about how to use constraints with scroll views.) How can I fix this?
>
> (OS X 10.10.4, Xcode 6.3.)
>
> ―Jens
>
> * thread #1: tid = 0x691af4, 0x0000000100005c08 Hops`-[RevTreeView setFrame:](self=0x0000610000141600, _cmd=0x00007fff8b0c9343, frame=(origin = (x = 0, y = 0), size = (width = 0, height = 0))) + 24 at RevTreeView.m:70, queue = 'com.apple.main-thread', stop reason = breakpoint 3.1
> * frame #0: 0x0000000100005c08 Hops`-[RevTreeView setFrame:](self=0x0000610000141600, _cmd=0x00007fff8b0c9343, frame=(origin = (x = 0, y = 0), size = (width = 0, height = 0))) + 24 at RevTreeView.m:70
> frame #1: 0x00007fff9564628f AppKit`-[NSView resizeWithOldSuperviewSize:] + 694
> frame #2: 0x00007fff9574ce05 AppKit`-[NSView layoutSubtreeIfNeeded] + 810
> frame #3: 0x00007fff95656e66 AppKit`-[NSView _sendViewWillDrawInRect:clipRootView:] + 47
> frame #4: 0x00007fff957fad04 AppKit`-[NSView displayRectIgnoringOpacity:inContext:] + 362
> frame #5: 0x00007fff959354cd AppKit`-[_NSMirrorDocumentView drawRect:] + 265
> frame #6: 0x00007fff95676859 AppKit`-[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inGraphicsContext:CGContext:topView:shouldChangeFontReferenceColor:] + 1186
> frame #7: 0x00007fff95676278 AppKit`__46-[NSView(NSLayerKitGlue) drawLayer:inContext:]_block_invoke + 218
> frame #8: 0x00007fff95675f21 AppKit`-[NSView(NSLayerKitGlue) _drawViewBackingLayer:inContext:drawingHandler:] + 2407
> frame #9: 0x00007fff956755a3 AppKit`-[NSView(NSLayerKitGlue) drawLayer:inContext:] + 108
> frame #10: 0x00007fff958296c6 AppKit`-[_NSBackingLayerContents drawLayer:inContext:] + 145
> frame #11: 0x00007fff8a669ce7 QuartzCore`-[CALayer drawInContext:] + 119
> frame #12: 0x00007fff958291fe AppKit`-[_NSTiledLayer drawTile:inContext:] + 625
> frame #13: 0x00007fff95828f2f AppKit`-[_NSTiledLayerContents drawLayer:inContext:] + 169
> frame #14: 0x00007fff8a669ce7 QuartzCore`-[CALayer drawInContext:] + 119
> frame #15: 0x00007fff95828e70 AppKit`-[NSTileLayer drawInContext:] + 169
> frame #16: 0x00007fff8a6683c7 QuartzCore`CABackingStoreUpdate_ + 3306
> frame #17: 0x00007fff8a6676d7 QuartzCore`___ZN2CA5Layer8display_Ev_block_invoke + 59
> frame #18: 0x00007fff8a667694 QuartzCore`x_blame_allocations + 81
> frame #19: 0x00007fff8a65b43c QuartzCore`CA::Layer::display_() + 1546
> frame #20: 0x00007fff95828d87 AppKit`-[NSTileLayer display] + 119
> frame #21: 0x00007fff956c2df4 AppKit`-[_NSTiledLayerContents update:] + 5688
> frame #22: 0x00007fff956c14c7 AppKit`-[_NSTiledLayer display] + 375
> frame #23: 0x00007fff8a6597fd QuartzCore`CA::Layer::display_if_needed(CA::Transaction*) + 603
> frame #24: 0x00007fff8a658e81 QuartzCore`CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 35
> frame #25: 0x00007fff8a658612 QuartzCore`CA::Context::commit_transaction(CA::Transaction*) + 242
> frame #26: 0x00007fff8a6583ae QuartzCore`CA::Transaction::commit() + 390
> frame #27: 0x00007fff9564eae6 AppKit`-[NSWindow _setFrameCommon:display:stashSize:] + 3771
> frame #28: 0x00007fff95937e73 AppKit`-[NSWindow(NSWindowResizing) _resizeWithEvent:] + 1469
> frame #29: 0x00007fff957dd47c AppKit`-[NSTitledFrame mouseDown:] + 200
> frame #30: 0x00007fff957dd3ab AppKit`-[NSThemeFrame mouseDown:] + 68
> frame #31: 0x00007fff95d4d2fc AppKit`-[NSWindow _reallySendEvent:isDelayedEvent:] + 14125
> frame #32: 0x00007fff956dcd76 AppKit`-[NSWindow sendEvent:] + 470
> frame #33: 0x00007fff956d9312 AppKit`-[NSApplication sendEvent:] + 2504
> frame #34: 0x00007fff95602c68 AppKit`-[NSApplication run] + 711
> frame #35: 0x00007fff9557f354 AppKit`NSApplicationMain + 1832
> frame #36: 0x0000000100003732 Hops`main(argc=3, argv=0x00007fff5fbff930) + 34 at main.m:12
> frame #37: 0x00007fff982285c9 libdyld.dylib`start + 1
>
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