On Mar 20, 2008, at 3:31 PM, Dave Hersey wrote:
Do you get anything different if you print the object as a pointer
(%p)? Printing it as an int value is... weird.
Try:
printf("Dragged Image: %p\n", (void *)[sender draggedImage]);
That's a useful format I'd either forgotten or never known, thanks! I was just casting to an int to get rid of the warning for the hex, though. (In C casts are pretty weak.) Now from all three methods I always get:
Dragged Image: 0x0...which is prettier, but still doesn't explain why the return value is always nil. Or why Sherm's car wouldn't start.
If this is a bug, it seems to have been around since before 2004. (See list of unanswered links in OP.) If it's a documentation omission, nobody seems to know what the docs *should* say, also since 2004. If it's user error, I'll still blame the docs, but at least I can make my bug report better!
Maybe this would be a better way of asking:What is the NSDraggingInfo protocol's -draggedImage method supposed to return, and under what circumstances?
thanks, -natevw
On Mar 20, 2008, at 6:15 PM, Nathan Vander Wilt wrote:...I subclassed an NSImageView to turn it into a dropbox to help me prototype a file-opening feature.I implemented the following method in my DropBox class: - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender { printf("Dragged Image: %x\n", (NSUInteger)[sender draggedImage]); return NSDragOperationLink; }When I hover any file/folder from the Finder over this drop box, I get:Dragged Image: 0in the debugging console. Likewise if I check it in my prepare/ performDragOperation, this value is always nil.The documentation says nothing about this method ever returning nil, so it's even more suprising to me that it would *always* return nil. I would expect it to give back a reference to the file/ folder icon image that I'm dragging around underneath the cursor. Is that not what this method is documented to do?thanks, -natevw
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