XForms: Input validation problem

Ian Leonard (ian@eonsw.demon.co.uk)
Sun, 13 Sep 1998 21:06:44 +0100 (BST)

# To subscribers of the xforms list from Ian Leonard <ian@eonsw.demon.co.uk> :

Greetings,

I have a form with two input boxes and I want the input to be validated when
data entry has been completed. I use an input filter. When invalid data is
entered and I have clicked on the second input box, the filter is called with
the 'newly typed character' set to zero (as per the manual). I return
FL_INVALID|FL_RINGBELL and focus remains in the first input field. This is
correct and what I want. But...

1. If there is text in the second input field, it gets selected when clicked on

2. If I click on the second box again, the focus is lost

3. If the field is blank ( and therefore invalid) and no characters are pressed
the validation is not called (same as problem 2 I would guess)

I have appended a small program that shows the problem.

TIA

-- 
Ian


Ian Leonard                eMail: ian@eonsw.demon.co.uk
                                   Phone Fax: +44 (0)1865 434757
                                   Fax: +44 (0)1865 434758
                                   19 Stapleton Road
                                   Headington, Oxford, OX3 7LX, UK 


Please ignore spelling and punctuation - I did.



--


#include "forms.h"
#include <stdlib.h>




int input_filter (FL_OBJECT *ob, const char *old, const char *cur, int c);


int main(int argc, char *argv[])
{
        FL_OBJECT *o1, *o2;
        FL_FORM *f;


        fl_initialize(&argc, argv, 0, 0, 0);


        f = fl_bgn_form(FL_NO_BOX, 441, 441);
        fl_add_box(FL_UP_BOX,0,0,441,441,"");


        o1 = fl_add_input(FL_NORMAL_INPUT,40,40,340,30,"O1");
        o2 = fl_add_input(FL_NORMAL_INPUT,40,80,340,30,"O2");


        fl_set_input_filter ( o1, input_filter);
        fl_set_input_filter ( o2, input_filter);


        fl_set_input ( o2, "test");


        fl_end_form();




        fl_show_form ( f, FL_PLACE_CENTERFREE,FL_FULLBORDER,"input");


        while (fl_do_forms())
        ;


        return 0;
}


int
input_filter ( FL_OBJECT *ob, const char *old, const char *cur, int c)
{
     printf ( "(%s)(%s) %d\n", old, cur, c);


     if ( c)
          return FL_VALID;


     return FL_INVALID|FL_RINGBELL;
}


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