Maintaining NSCursor outside of app window
Maintaining NSCursor outside of app window
- Subject: Maintaining NSCursor outside of app window
- From: Markus Spoettl <email@hidden>
- Date: Thu, 13 Jan 2011 19:11:39 -0500
Hello,
I have a drag-n-drop UI where I use the [NSCursor disappearingItemCursor] to indicate that if you drop now, you're going to remove the item being dragged. I do this by setting the cursor when my dragging destination receives a -draggingExited: message (the dragging destination and source are the same, an NSView subclass).
It works well inside the application but when the cursor leaves the application window, things break down. When this happens the cursor is reset to the default arrow cursor. What's worse is that it doesn't return to -disappearingItemCursor when the cursor re-enters my window - not view - without releasing the mouse.
What I'd like to get to is a behavior like that of Finder. When you drag a "Places" item out of the source list Finder somehow manages to maintain the cursor, even if the app behind the cursor is something else.
My drag starts with a call to NSView's -dragImage:at:offset:event:pasteboard:source:slideBack:
I'd rather not implement the whole dragging UI (transparent foreground window occupying the entire screen, painting the drag image myself - at least I think that's how it could work) if I can avoid it because I fear there are countless little traps to hit on the way.
Is there a way not to get the cursor reset by AppKit behind my back?
Regards
Markus
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Markus Spoettl
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