Dear programmers,
So, I used the crop marker code that apple provides to experiment in creating a
selecting rectangle. I first subclassed NsView as MWSelectingView, and
everything worked like clock work. I was even able to modify the CropMarker
object (MWViewSelectionMarker) so that when the window resizes it resizes as
well.
I then just changed my MWSelectingView so it is a subclass of PDFView instead.
No go. Now even before I can click on it, while it is loading from nib it bombs
with the following pearls of wisdom. I can't find a discussion of cpSelections
anywhere. I also don't get how come it even comes to call
MWViewSelectionMarker. Only my subclass knows about it. Yes it calls it in
drawRect, but really nowhere else. Thoughts? Any experience in subclassing
PDFVIew to capture mouse downs?
2010-05-26 13:01:19.903 SelectedImage[1487:a0f] -[MWViewSelectionMarker
cpSelections]: unrecognized selector sent to instance 0x102030480
2010-05-26 13:01:19.906 SelectedImage[1487:a0f] An uncaught exception was raised
2010-05-26 13:01:19.906 SelectedImage[1487:a0f] -[MWViewSelectionMarker
cpSelections]: unrecognized selector sent to instance 0x102030480
2010-05-26 13:01:20.017 SelectedImage[1487:a0f] *** Terminating app due to
uncaught exception 'NSInvalidArgumentException', reason:
'-[MWViewSelectionMarker cpSelections]: unrecognized selector sent to instance
0x102030480'
*** Call stack at first throw:
(
0 CoreFoundation 0x00007fff88964d24
__exceptionPreprocess + 180
1 libobjc.A.dylib 0x00007fff8472e0f3
objc_exception_throw + 45
2 CoreFoundation 0x00007fff889be160
+[NSObject(NSObject) doesNotRecognizeSelector:] + 0
3 CoreFoundation 0x00007fff88936d3f
___forwarding___ + 751
4 CoreFoundation 0x00007fff88932e88
_CF_forwarding_prep_0 + 232
5 PDFKit 0x00007fff846576ee
-[PDFView(PDFViewInternal) invalidateSelectionBounds:] + 54
6 PDFKit 0x00007fff8464c71a -[PDFView
becomeFirstResponder] + 42
7 AppKit 0x00007fff856849b6 -[NSWindow
makeFirstResponder:] + 643
8 AppKit 0x00007fff85684696 -[NSWindow
_selectFirstKeyView] + 679
9 AppKit 0x00007fff856843cf -[NSWindow
_setUpFirstResponderBeforeBecomingVisible] + 190
10 AppKit 0x00007fff85683773 -[NSWindow
_reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 986
11 AppKit 0x00007fff8568334a -[NSWindow
orderWindow:relativeTo:] + 94
12 AppKit 0x00007fff8564f340
-[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1726
13 AppKit 0x00007fff8564d45d loadNib + 226
14 AppKit 0x00007fff8564c96d
+[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 248
15 AppKit 0x00007fff8564c7a5
+[NSBundle(NSNibLoading) loadNibNamed:owner:] + 326
16 AppKit 0x00007fff85649d27
NSApplicationMain + 279
17 SelectedImage 0x0000000100000e5d main + 33
18 SelectedImage 0x0000000100000e34 start + 52
)
terminate called after throwing an instance of 'NSException'
Program received signal: “SIGABRT”.
Matthew Weinstein
Associate Professor of Science Education
Education Program
U.W. - Tacoma
253 692-4787
matth...@u.washington.edu
Campus Box: 358435
1900 Commerce Street
Tacoma, WA 98402-3100
Office: (253) 692-4787
FAX: (253) 692-5612
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