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GObject ╰── GInitiallyUnowned ╰── GtkObject ╰── GtkWidget ╰── GtkRange ╰── GtkScale ╰── GtkHScale
GtkWidget * gtk_hscale_new_with_range (gdouble min,gdouble max,gdouble step);
Creates a new horizontal scale widget that lets the user input a
number between min
 and max
 (including min
 and max
) with the
increment step
.  step
 must be nonzero; it's the distance the
slider moves when using the arrow keys to adjust the scale value.
Note that the way in which the precision is derived works best if step
is a power of ten. If the resulting precision is not suitable for your
needs, use gtk_scale_set_digits() to correct it.