Re: Cast from gchar* to int?

[Brandon McCombs <brandon ovnet com>]

I had this same exact problem William.  I used atoi() just like you did
however it worked for me. These are the 2 relevant lines of code.

int pick3player[3] = { -1, -1, -1 };
pick3player[i] =
atoi(gtk_editable_get_chars(GTK_EDITABLE(pick3entry[i]), 0, -1));


This gives me the numbers that were put into the 3 entry boxes and
stores them in the int array. 
There shouldn't be anything else that you need to do.

I use g_snprintf() to make the int go back to a char to use
gtk_entry_set_text on it.

Probably not the most elegant solution but I don't profess to be a real
programmer.

HTH
brandon





"William L. Thomson Jr." wrote:
> 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
>
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