Trait gdk4::prelude::DrawContextExtManual[−][src]

pub trait DrawContextExtManual: 'static {
    fn frame_region(&self) -> Option<Region>;
}

Required methods

Retrieves the region that is currently being repainted.

After a call to DrawContextExt::begin_frame() this function will return a union of the region passed to that function and the area of the surface that the self determined needs to be repainted.

If self is not in between calls to DrawContextExt::begin_frame() and DrawContextExt::end_frame(), None will be returned.

Returns

a Cairo region

Implementors