1use crate::{
 2    AfterLayoutContext, AppContext, Element, Event, EventContext, LayoutContext, MutableAppContext,
 3    PaintContext, SizeConstraint,
 4};
 5use pathfinder_geometry::vector::Vector2F;
 6
 7pub struct Empty {
 8    size: Option<Vector2F>,
 9    origin: Option<Vector2F>,
10}
11
12impl Empty {
13    pub fn new() -> Self {
14        Self {
15            size: None,
16            origin: None,
17        }
18    }
19}
20
21impl Element for Empty {
22    fn layout(
23        &mut self,
24        constraint: SizeConstraint,
25        _: &mut LayoutContext,
26        _: &AppContext,
27    ) -> Vector2F {
28        self.size = Some(constraint.min);
29        constraint.max
30    }
31
32    fn after_layout(&mut self, _: &mut AfterLayoutContext, _: &mut MutableAppContext) {}
33
34    fn paint(&mut self, origin: Vector2F, _: &mut PaintContext, _: &AppContext) {
35        self.origin = Some(origin);
36    }
37
38    fn dispatch_event(&self, _: &Event, _: &mut EventContext, _: &AppContext) -> bool {
39        false
40    }
41
42    fn size(&self) -> Option<Vector2F> {
43        self.size
44    }
45}