Re: [Visualpython-users] Is it possible to detect key changes during drag ?

[Bruce S. <Bru...@nc...>]

Information about crtl, alt, and shift is part of scene.mouse; see the 
documentation on handling mouse events.

Also, keyboard events need not block, just as mouse events need not 
block. scene.kb.keys is nonzero if there is a keyboard event waiting to 
be processed, just as scene.mouse.events is nonzero if there is a mouse 
event wating to be processed.

Here is an example:

scene.range=10
s = sphere(radius=0.5)
while 1:
     rate(100)
     m = scene.mouse # dragging with mouse buttons up
     s.pos = m.pos
     if m.alt:
         s.color = color.red
     elif m.ctrl:
         s.color = color.cyan
     elif m.shift:
         s.color = color.yellow
     if scene.kb.keys:
         k = scene.kb.getkey()
         if k == 'b':
             s.color = color.blue
         elif k == 'g':
             s.color = color.green

I'm guessing that what you mean by your final question is whether it is 
possible to specify a function to be called when an event occurs, rather 
than watching for an event in a loop, as in the routine above. The 
answer is no; you have to detect events in a loop.

Bruce Sherwood

Stef Mientki wrote:
> hello,
> 
> I would like to detect if one of the special keys,
> like Ctrl-Alt-Shift changes during mouse dragging.
> 
> As far as I can see,
> this doesn't seem possible,
> because
> - those keys don't generate a mouse event
> - waiting for a key event blocks the dragging
> Is this correct ?
> 
> A more general question is:
> is it possible to detect key or mouse events,
> without waiting to happen ?
> 
> thanks,
> Stef
> 
> ------------------------------------------------------------------------------
> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada.
> The future of the web can't happen without you.  Join us at MIX09 to help
> pave the way to the Next Web now. Learn more and register at
> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users