Re: Command-Key modified cursor
Re: Command-Key modified cursor
- Subject: Re: Command-Key modified cursor
- From: John Nairn <email@hidden>
- Date: Mon, 7 Jan 2008 11:55:47 -0800
On Jan 7, 2008, at 8:41 AM, Benjamin Stiglitz wrote:
I implemented tracking rects and used mouseMove to change the
cursor depending on modifier keys. In this case holding command key
is zoom in while command and option is zoom out. It works OK, but
pressing the command key does not get the correct curser until the
mouse physically moves again. I tried to find an event for key
press, but could not find one (command key or option key alone do
not generate keyDown event). I didn't try cursor rects, but found
no indication that cursor tracking would update correctly on
command or option key presses.
Check out -[NSResponder flagsChanged:].
-Ben
Thanks Ben,
That handles most of the issue, but since flagsChanged only responds
to changes, I had to handle special cases where the zoom cursor should
change even when the modifier flags have not changed (e.g., when mouse
enters or exits the zoom region, when the window becomes or loses key,
and also after doing a zoom (because that redisplay also reset the
cursor)).
One remaining issue is when window becomes key after losing key
status. I need to reset the cursor using the current state of the
modifier flags. I was hoping to find an NSEvent class method for those
flags (e.g. [NSEvent currentModifierFlags]) that would provide the
same function as [NSEvent mouseLocation], which returns the mouse
location at any time (i.e., not needing an event to occur), but could
not find one? Maybe a carbon call could work here?
---------------
John Nairn (1-541-737-4265, FAX:1-541-737-3385)
Professor and Richardson Chair
Web Page: http://woodscience.oregonstate.edu/faculty/Nairn
FEA/MPM Web Page: http://oregonstate.edu/~nairnj
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