Sets our main struct and passes it to the parent class.
Create a new #HdyArrows widget.
Render the arrows animation.
Get the main Gtk struct
Get the number of arrows displayed in the widget.
Get the direction the arrows point to
Get the duration of the arrows animation.
the main Gtk struct as a void*
Set the number of arrows to display.
Set the direction the arrows should point to.
Set the duration of the arrow animation.
the main Gtk struct