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Re: NSTableView and dragging cursor
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Re: NSTableView and dragging cursor


  • Subject: Re: NSTableView and dragging cursor
  • From: Ken Victor <email@hidden>
  • Date: Fri, 11 Nov 2005 16:13:14 -0800

for the archives (i stumbled across this right after my posting):

in the table source's tableView:validateDrop:proposedRow:proposedDropOperation: method, you can check the option key via:

	(([[NSApp currentEvent] modifierFlags] & NSAlternateKeyMask) != 0)

however, i'm still a little curious as to why this behavior doesn't happen automatically... ie, did i misread the documentation? (likely) or is the documentation wrong?

ken



At 3:55 PM -0800 11/11/05, Ken Victor wrote:
as near as i can tell from the documentation, as long as i don't implement ignoreModifierKeysWhileDragging (or if i do and it returns NO), then the dragging cursor should automatically change to the copy cursor when the user presses the option key. i've returned NSDragOperationCopy | NSDragOperationDelete | NSDragOperationMove from my draggingSourceOperationMaskForLocal: method (in my NSTableView subclass) and i return NSDragOperationGeneric from my table source tableView:validateDrop:proposedRow:proposedDropOperation: . but pressing the option key doesn't change the cursor.

i've discovered that if i return NSDragOperationCopy from tableView:validateDrop:proposedRow:proposedDropOperation: then the cursor does change to the copy cursor.

but how do i detect whether or not the option key is pressed in my tableView:validateDrop:proposedRow:proposedDropOperation: method? or do i have to do something else to get the automatic behavior?

in searching the archives, all i could find was a suggestion to override -(NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender in my NSTableView subclass. but i don't see how to detect the option key press in that method either.

any help/pointers/sample code greatly appreciated.

thanx,
ken
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  • Follow-Ups:
    • Re: NSTableView and dragging cursor
      • From: Jim Correia <email@hidden>
References: 
 >NSTableView and dragging cursor (From: Ken Victor <email@hidden>)

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