objective c - mouseUp not firing in Cocoa? -


i'm trying implement drag&drop functionality in app , ran problem of mouseup event not firing. fires fine if click , release on view, if drag, mousedragged event fires , that's it.

by trying different things figured out problem in dragimage call, don't know how solve now.

here code:

-(void) mousedragged:(nsevent *)theevent {    isdragging = yes;     if ([selectedcellrowindex longvalue] >= 0)    {       nsimage *im = [[nsimage alloc]initwithcontentsoffile:@"/users/username/desktop/drag.png"];       nssize dragoffset = nsmakesize(0.0, 0.0);       nspasteboard *pboard = [nspasteboard pasteboardwithname:nsdragpboard];        [pboard declaretypes:[nsarray arraywithobject:nstiffpboardtype]  owner:self];       [pboard setdata:[im tiffrepresentation] fortype:nstiffpboardtype];        [self dragimage:im                    at:downpointrelativetotable                offset:dragoffset                 event:theevent            pasteboard:pboard                source:self             slideback:yes];   } }

does know problem can be?! thank you!

in code snippet you're getting nspasteboard instance not copying data it. that's required, otherwise drag won't initiated - that's why you'll never mouseup: event.

the docs dragimage:at:offset:event:pasteboard:source:slideback: state

before invoking method, must place data transferred on pboard. this, drag pasteboard object (nsdragpboard), declare types of data, , put data on pasteboard.


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