X coordinate of the start circle
Y coordinate of the start circle
radius of the start circle
X coordinate of the end circle
Y coordinate of the end circle
radius of the end circle
Return: A newly created #GtkGradient
Deprecated: #GtkGradient is deprecated.
ConstructionException GTK+ fails to create the object.
3.0
Creates a new radial gradient along the two circles defined by (x0, y0, radius0) and (x1, y1, radius1). Before using the gradient a number of stop colors must be added through gtk_gradient_add_color_stop().