Gets the area @self can start a swipe from for the given direction and
gesture type.
This can be used to restrict swipes to only be possible from a certain area,
for example, to only allow edge swipes, or to have a draggable element and
ignore swipes elsewhere.
If not implemented, the default implementation returns the allocation of
@self, allowing swipes from anywhere.
Gets the area @self can start a swipe from for the given direction and gesture type.
This can be used to restrict swipes to only be possible from a certain area, for example, to only allow edge swipes, or to have a draggable element and ignore swipes elsewhere.
If not implemented, the default implementation returns the allocation of @self, allowing swipes from anywhere.