Sakari,
If you want to change the cursor anytime a modifier key is depressed
on both Windows and Mac, then I believe you will have to use either a
polling method (send in time), idle message or mouseWithin--none of
which are very processor friendly and can interfere with other things
like clicking links.
HOWEVER...if you are developing for Windows only, then you are in
luck. ANYTIME you depress a mod key, the rawKeydown message is sent.
This may also be so for Linux, but I have not tested that.
I would dearly love to have the ability to check mod keys anytime via
rawkeydown message on Mac as well, but, at least in my tests over the
years, this is not yet possible. As anyone who has developed a
standalone application knows, there is an "event loop" that spawns
things like the idle message and mousewithin message that Rev has. I
am baffled why it is so hard to send a message anytime any key is
depressed from within the Revolution engine. How could the Mac OS
forbid such a thing. It never used to when I worked on apps in C and
Pascal on Mac OS 7.
We check mod keys for no-click inspection in GLX2, so I think I
understand the exercise. We need to know mod key states even if the
mouse is not within rect of the stack as well. So we check the mod key
states while the mouse is moving and then send a series of "staggered"
messages every 350 millisecs after the mouse stops moving to catch
modifier key states outside of the stack window, etc. This taxes our
processor time very, very little and provides almost zero interference
with the IDE's other tasks, fortunately. But it is certainly not ideal
as the staggered messages die out after a few seconds.
Best,
Jerry Daniels
Daniels & Mara, Inc.
Makers of GLX2
http://www.daniels-mara.com/glx2
On Jan 14, 2008, at 2:40 PM, Jan Schenkel wrote:
--- Sakari Ruoho <[EMAIL PROTECTED]> wrote:
Hello folks,
Was wondering how to change the mouse cursor
behavior, when user
presses either ctrl or shift key? Like in photoshop
with select tool
where u can add to selection by pressing shift and
remove from
selection by pressing ctrl? If anyone has
implemented anything like
this, any help would be appreaciated. Thank you!
Sakari Ruoho
Hi Sakari,
Others already suggested trapping the 'mouseWithin'
message, or polling every 100 milliseconds using a
'send in time' construct; here's a different approach:
##
local sKeysDown
on rawKeyDown pKey
if the keysDown is not sKeysDown then RefreshCursor
pass rawKeyDown
end rawKeyDown
on rawKeyUp pKey
if the keysDown is not sKeysDown then RefreshCursor
pass rawKeyUp
end rawKeyUp
on RefreshCursor
put the keysDown into sKeysDown
if the controlKey is down then
set the defaultCursor to hand
else
set the defaultCursor to arrow
end if
end RefreshCursor
##
Hope this helped,
Jan Schenkel.
Quartam Reports & PDF Library for Revolution
<http://www.quartam.com>
=====
"As we grow older, we grow both wiser and more foolish at the same
time." (La Rochefoucauld)
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