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Re: Spin button widget?? [message #45679 is a reply to message #45669]

Fri, 23 September 2005 10:01

edward.s.meinel@aero. is currently offline

edward.s.meinel@aero.
Messages: 52
Registered: February 2005

Member

Peter Albert wrote:
>
> thanks for the tip, I just built it into an application. However, I'd
> like to mention a trap I stepped into: if setting the INCREMENT keyword
> to a float value like 0.1, the arrow_up button seems not to work. If
> you set it to a double precision value, it works. arrow_down always
> works. Very weird.
>
> Peter

Numerical analysis should be a required course for anyone who
programs...

Computers use base 2 arithmetic, not base 10. Therefore 0.1 cannot be
represented exactly on a computer. In particular, 0.1 in single
precision IS NOT EQUAL TO 0.1 in double precision.

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[Message index]

		Re: Spin button widget?? By: peter.albert@gmx.de on Mon, 26 September 2005 02:26
		Re: Spin button widget?? By: edward.s.meinel@aero. on Fri, 23 September 2005 10:01
		Re: Spin button widget?? By: David Alexander on Fri, 23 September 2005 09:03
		Re: Spin button widget?? By: raval.chintan on Fri, 23 September 2005 07:28
		Re: Spin button widget?? By: peter.albert@gmx.de on Thu, 22 September 2005 23:48
		Re: Spin button widget?? By: b_gom on Thu, 22 September 2005 09:48
		Re: Spin button widget?? By: David Alexander on Thu, 22 September 2005 08:22
		Re: Spin button widget?? By: Benjamin Luethi on Thu, 22 September 2005 02:24

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