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Probably the most often used spinner functions are
double fl_get_spinner_value(FL_OBJECT *obj ); double fl_set_spinner_value(FL_OBJECT *obj, double val);
The first one returns the value of a spinner. The type of the return
value is a double for both integer and floating point spinners, so
you have to convert it for integer spinners appropriately, e.g:
using the FL_nint()
macro, that converts a double to the
nearest integer value.
You can set or retrieve the upper and lower limit the value a spinner can be set to using the functions
void fl_set_spinner_bounds(FL_OBJECT *obj, double min, double max); void fl_get_spinner_bounds(FL_OBJECT *obj, double *min, double *max);
Since this function is to be used for integer as well as floating
point spinner objects the double
type values must be converted
as necessary for FL_INT_SPINNER
.
The default limits are -10000
and 10000
, but can be
set to up to INT_MIN
and INT_MIN
for
FL_INT_SPINNER
s and -DBL_MAX
and DBL_MAX
for FL_FLOAT_SPINNER
s.
To set or determine the step size by which a spinner will be incremented or decremented when one of the buttons is clicked on use
void fl_set_spinner_step(FL_OBJECT *obj, double step); double fl_get_spinner_step(FL_OBJECT *obj);
The default step size is 1
for both FL_INT_SPINNER
and FL_FLOAT_SPINNER
objects.
For FL_FLOAT_SPINNER
objects you can set (or determine)
how many digits after the decimal point are shown by using
void fl_set_spinner_precision(FL_OBJECT *obj, int prec); int fl_get_spinner_precision(FL_OBJECT *obj);
This is per default set to 6 digits after the decimal point. The
function for setting the precision has no effect on
FL_INT_SPINNER
objects and the other one returns 0 for
this type of spinners.
Next: Spinner Attributes, Previous: Spinner Interaction, Up: Spinner Object [Contents][Index]