Re: Detecting option key down/up during drag
Re: Detecting option key down/up during drag
- Subject: Re: Detecting option key down/up during drag
- From: Dan Waylonis <email@hidden>
- Date: Mon, 17 Nov 2003 10:37:46 -0800
On Nov 16, 2003, at 10:41 PM, Keith Renz wrote:
>
I've searched the mamasam archives and haven't found a definitive
>
answer. How can I detect the option key down/up during a drag like the
>
Finder? I've implemented dragging in a table view, but I want to be
>
able to option-drag to make a copy (vs. move) and be able to change my
>
mind in the middle of a drag. I can detect the option key immediately
>
before the drag starts, but that doesn't help during the drag.
Hi Keith,
There are two ways (off the top of my head):
In Cocoa, if your "dragging" is implemented using mouseDragged: (rather
than an event loop within your own mouseDown:), then you should be able
to implement flagsChanged:(NSEvent *) method to keep track of the
current modifier state.
In Carbon, you can use GetKeys() and interpret the resulting map. Left
as an exercise to the reader... :-)
Dan
_________________________________________________
Dan Waylonis email@hidden
Software Engineer
http://www.nekotech.com
nekotech SOFTWARE 650.964.2490 (O)
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