Re: Cast from gchar* to int?

["William L. Thomson Jr." <support obsidian-studios com>]

Martyn,

On Tue, 2002-09-24 at 15:13, Martyn Russell wrote:
> It looks to me like you are using the wrong control.  Perhaps you want a 
> spin button?  This would mean you could guarantee an integer and not a 
> string with other character (not 0-9) AND you can get an int using a gtk 
> function call:

I had thought about it, but prefer the look of the regular text field. I
have buttons that will handle the incrementing up or down, as well as
extracting the relevant data from a database and filling in all
appropriate fields.

> there is also a function to get it as a float.  Remember if using this 
> control to call _gtk_spin_button_set_numeric_ to make sure it ONLY 
> accepts numeric values.

I like that the spin_button can be set to only accept numeric input. I
have not found a similar function call for the regular entry fields.

Now with that said, from playing with the spin_button, is there a way to
not specify a maximum size? The max size will be determined by seeing if
the table in the database has that many rows. I could set it at run
time, but it would be another query. One that I would like to avoid if
possible.

I really would like to stick with the standard gtk_entry widget, and not
use the spin_button if I can. It should be possible, no?

I am not really worried about non numeric input, because only
intelligent people will be using this app internally. We know to only
put numeric input in numeric fields.

I just really would like to know how to convert a char* to an int, and
why the atoi functions and others will not do this for me. Not to
mention why they output 0.

If I test with a regular numeric string and convert to an int/long/etc
using the atoi/atol/etc functions it works. If I swap out my hard coded
numeric string with the input from the gtk_entry field I get 0.

Really strange and a little frustrating.

Thanks for your input though, I may still have to use the spin_button,
so thanks for the suggestion.


-- 
Sincerely,
William L. Thomson Jr.
Support Group
Obsidian-Studios Inc.
439 Amber Way
Petaluma, Ca. 94952
Phone  707.766.9509
Fax    707.766.8989
http://www.obsidian-studios.com