On Jan 13, 2011, at 16:48, Markus Spoettl wrote:
> On Jan 13, 2011, at 7:37 PM, Corbin Dunn wrote:
>> - (void)draggedImage:(NSImage *)draggedImage movedTo:(NSPoint)screenPoint
>>
>> Then do something like this (after converting the screen point to window
>> coords):
>>
>> NSPoint windowPoint = [[view window] mouseLocationOutsideOfEventStream];
>> NSPoint localPoint = [view convertPoint:windowPoint fromView:nil];
>> if (![view mouse:localPoint inRect:[view visibleRect]]) {
>> [[NSCursor disappearingItemCursor] set];
>> }
>
> Fantastic, thanks so much Corbin!
It may be problem fully solved in regard to your original question, but ...
1. In the past, in trying to debug why the cursor changes back to an arrow
unexpectedly (in the sorts of scenario you described) I found that scroll views
tend to change the cursor when the pointer passes over parts of the scroll view
that aren't showing the document view itself -- scroll bars, borders, etc. That
can be annoying when you're trying to manage the cursor very carefully yourself.
2. I don't know how big a problem it is, but there's a doubtful aspect of using
'mouseLocationOutsideOfEventStream' like this. At the time such code is
executed, the position of whatever is being dragged (the transparent image in
this case) may well be synchronized with the event stream. It's possible for
the unsynchronized position to be quite different, which means that the image
position and the cursor shape would end up being puzzlingly mismatched.
Whether this would afflict the above code, I really don't know, but it's worth
spending a bit of time testing (with fast pointer movements and busy
processors, perhaps).
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