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use crate::*;
pub struct ModView<S, F> {
pub func: F,
pub value: S,
}
impl<S, V, F> View for ModView<S, F>
where
V: View,
S: Clone + Default + 'static,
F: Fn(S, &mut Context) -> V + 'static,
{
fn print(&self, id: ViewId, cx: &mut Context) {
(self.func)(self.value.clone(), cx).print(id.child(&0), cx);
}
fn process(&self, event: &Event, id: ViewId, cx: &mut Context, vger: &mut VGER) {
(self.func)(self.value.clone(), cx).process(event, id.child(&0), cx, vger);
}
fn draw(&self, id: ViewId, cx: &mut Context, vger: &mut VGER) {
(self.func)(self.value.clone(), cx).draw(id.child(&0), cx, vger);
}
fn layout(&self, id: ViewId, sz: LocalSize, cx: &mut Context, vger: &mut VGER) -> LocalSize {
let child_size = (self.func)(self.value.clone(), cx).layout(id.child(&0), sz, cx, vger);
cx.layout.insert(
id,
LayoutBox {
rect: LocalRect::new(LocalPoint::zero(), child_size),
offset: LocalOffset::zero(),
},
);
child_size
}
fn dirty(
&self,
id: ViewId,
xform: LocalToWorld,
cx: &mut Context,
region: &mut Region<WorldSpace>,
) {
(self.func)(self.value.clone(), cx).dirty(id.child(&0), xform, cx, region);
}
fn hittest(
&self,
id: ViewId,
pt: LocalPoint,
cx: &mut Context,
vger: &mut VGER,
) -> Option<ViewId> {
(self.func)(self.value.clone(), cx).hittest(id.child(&0), pt, cx, vger)
}
fn commands(&self, id: ViewId, cx: &mut Context, cmds: &mut Vec<CommandInfo>) {
(self.func)(self.value.clone(), cx).commands(id.child(&0), cx, cmds);
}
fn gc(&self, id: ViewId, cx: &mut Context, map: &mut Vec<ViewId>) {
map.push(id);
(self.func)(self.value.clone(), cx).gc(id.child(&0), cx, map);
}
fn access(
&self,
id: ViewId,
cx: &mut Context,
nodes: &mut Vec<accesskit::Node>,
) -> Option<accesskit::NodeId> {
(self.func)(self.value.clone(), cx).access(id.child(&0), cx, nodes)
}
}
impl<S, F> private::Sealed for ModView<S, F> {}
pub fn modview<
S: Clone + Default + 'static,
V: View,
F: Fn(S, &mut Context) -> V + 'static,
>(
f: F,
) -> ModView<S, F> {
ModView {
func: f,
value: Default::default(),
}
}