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Implement Scrollable in iced_pure

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This commit is contained in:
Héctor Ramón Jiménez 2022-02-12 15:17:44 +07:00
parent 178914ec23
commit b2670e8752
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GPG key ID: 140CC052C94F138E
5 changed files with 809 additions and 377 deletions
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18
pure/src/widget/tree.rs
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@ -4,7 +4,7 @@ use std::any::{self, Any};
pub struct Tree {
pub tag: any::TypeId,
pub state: Box<dyn Any>,
pub state: State,
pub children: Vec<Tree>,
}
@ -12,7 +12,7 @@ impl Tree {
pub fn empty() -> Self {
Self {
tag: any::TypeId::of::<()>(),
state: Box::new(()),
state: State(Box::new(())),
children: Vec::new(),
}
}
@ -22,7 +22,7 @@ impl Tree {
) -> Self {
Self {
tag: element.as_widget().tag(),
state: element.as_widget().state(),
state: State(element.as_widget().state()),
children: element
.as_widget()
.children()
@ -58,18 +58,22 @@ impl Tree {
*self = Self::new(new);
}
}
}
pub fn state<T>(&self) -> &T
pub struct State(Box<dyn Any>);
impl State {
pub fn downcast_ref<T>(&self) -> &T
where
T: 'static,
{
self.state.downcast_ref().expect("Downcast widget state")
self.0.downcast_ref().expect("Downcast widget state")
}
pub fn state_mut<T>(&mut self) -> &mut T
pub fn downcast_mut<T>(&mut self) -> &mut T
where
T: 'static,
{
self.state.downcast_mut().expect("Downcast widget state")
self.0.downcast_mut().expect("Downcast widget state")
}
}