singleton: to_index() & to_grid()
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@ -1,6 +1,8 @@
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pub mod buffer;
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pub mod map;
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pub mod to_index;
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//pub mod unwrap;
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use {
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std::{
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85
nested/src/singleton/to_index.rs
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85
nested/src/singleton/to_index.rs
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@ -0,0 +1,85 @@
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use {
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std::sync::Arc,
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std::sync::RwLock,
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crate::{
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singleton::{SingletonView},
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index::{IndexView},
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grid::{GridView},
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core::{
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Observer, ObserverExt, ObserverBroadcast,
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View, ViewPort, OuterViewPort
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}
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}
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};
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//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
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impl<Item: 'static> OuterViewPort<dyn SingletonView<Item = Item>> {
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pub fn to_index(&self) -> OuterViewPort<dyn IndexView<(), Item = Item>> {
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let port = ViewPort::new();
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port.add_update_hook(Arc::new(self.0.clone()));
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let map = Arc::new(RwLock::new(Singleton2Index {
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src_view: None,
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cast: port.inner().get_broadcast()
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}));
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self.add_observer(map.clone());
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port.inner().set_view(Some(map));
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port.into_outer()
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}
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pub fn to_grid(&self) -> OuterViewPort<dyn GridView<Item = Item>> {
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self.to_index()
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.map_key(
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|_msg: &()| cgmath::Point2::new(0, 0),
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|pt| if pt.x == 0 && pt.y == 0 { Some(()) } else { None }
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)
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}
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}
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//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
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pub struct Singleton2Index<SrcView>
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where SrcView: SingletonView + ?Sized
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{
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src_view: Option<Arc<SrcView>>,
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cast: Arc<RwLock<ObserverBroadcast<dyn IndexView<(), Item = SrcView::Item>>>>
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}
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//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
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impl<SrcView> View for Singleton2Index<SrcView>
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where SrcView: SingletonView + ?Sized
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{
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type Msg = ();
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}
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impl<SrcView> IndexView<()> for Singleton2Index<SrcView>
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where SrcView: SingletonView + ?Sized
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{
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type Item = SrcView::Item;
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fn area(&self) -> Option<Vec<()>> {
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Some(vec![()])
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}
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fn get(&self, _msg: &()) -> Option<Self::Item> {
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Some(self.src_view.as_ref().unwrap().get())
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}
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}
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//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
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impl<SrcView> Observer<SrcView> for Singleton2Index<SrcView>
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where SrcView: SingletonView + ?Sized
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{
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fn reset(&mut self, view: Option<Arc<SrcView>>) {
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self.src_view = view;
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self.cast.notify(&());
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}
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fn notify(&mut self, msg: &()) {
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self.cast.notify(msg);
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}
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}
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