mfc, Disabling buttons on a spinner control

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mfc >> Disabling buttons on a spinner control

by Alain Dekker » Thu, 27 Nov 2003 20:08:01 GMT

Hi,

Lets say you have a edit field that ranges from 1-1000 with an attached
spinner. Is it possible to disable the "up" button if you have reached 1000,
and the "down" button if the value has reached 1?

Many thanks,
Alain



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mfc >> Disabling buttons on a spinner control

by David A. Mair » Fri, 28 Nov 2003 02:17:16 GMT





1000,

If you set the range of the spin control then the up button while staying
enabled will stop functioning at the value you set in the range, similarly
for the down button. From trivial testing with Spy++ it doesn't appear to
me that a spin control is implemented as a window with a child representing
each button. It looks like the buttons are drawn by the implementation of
the control.




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mfc >> Disabling buttons on a spinner control

by Alain Dekker » Fri, 28 Nov 2003 23:00:10 GMT

Thanks for the answer David.

I realise that the button remains enabled when the limit is hit. Its just
that someone in our testing department asked this, and I couldn't see an
easy way to do it. Thinking about it, its much better that the button does
remain enabled so tht when you click "up" and the value does not increment
you have visual feedback that the limit has been reached.

Alain





representing



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Disabling buttons on a spinner control

by David A. Mair » Sun, 30 Nov 2003 08:37:13 GMT

This is also the "standard" behaviour of a spin control and behaving
differently (i.e. behaving as your test department requested) would also be
to behave differently from most other Windows applications. That's
typically not a good thing to do as it can confuse users when standard
looking controls don't behave in the standard manner.







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