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fix(segmented_button): diff the context menu

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This commit is contained in:
Jeremy Soller 2024-10-14 11:21:40 -06:00
parent 8da25f94e9
commit dc97166f91
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GPG key ID: D02FD439211AF56F
3 changed files with 95 additions and 77 deletions
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139
src/widget/menu/menu_bar.rs
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@ -63,6 +63,82 @@ impl Default for MenuBarState {
}
}
pub(crate) fn menu_roots_children<'a, Message, Renderer>(
menu_roots: &Vec<MenuTree<'a, Message, Renderer>>,
) -> Vec<Tree>
where
Renderer: renderer::Renderer,
{
/*
menu bar
menu root 1 (stateless)
flat tree
menu root 2 (stateless)
flat tree
...
*/
menu_roots
.iter()
.map(|root| {
let mut tree = Tree::empty();
let flat = root
.flattern()
.iter()
.map(|mt| Tree::new(mt.item.as_widget()))
.collect();
tree.children = flat;
tree
})
.collect()
}
#[allow(invalid_reference_casting)]
pub(crate) fn menu_roots_diff<'a, Message, Renderer>(
menu_roots: &mut Vec<MenuTree<'a, Message, Renderer>>,
tree: &mut Tree,
) where
Renderer: renderer::Renderer,
{
if tree.children.len() > menu_roots.len() {
tree.children.truncate(menu_roots.len());
}
tree.children
.iter_mut()
.zip(menu_roots.iter())
.for_each(|(t, root)| {
let mut flat = root
.flattern()
.iter()
.map(|mt| {
let widget = mt.item.as_widget();
let widget_ptr = widget as *const dyn Widget<Message, crate::Theme, Renderer>;
let widget_ptr_mut =
widget_ptr as *mut dyn Widget<Message, crate::Theme, Renderer>;
//TODO: find a way to diff_children without unsafe code
unsafe { &mut *widget_ptr_mut }
})
.collect::<Vec<_>>();
t.diff_children(flat.as_mut_slice());
});
if tree.children.len() < menu_roots.len() {
let extended = menu_roots[tree.children.len()..].iter().map(|root| {
let mut tree = Tree::empty();
let flat = root
.flattern()
.iter()
.map(|mt| Tree::new(mt.item.as_widget()))
.collect();
tree.children = flat;
tree
});
tree.children.extend(extended);
}
}
/// A `MenuBar` collects `MenuTree`s and handles all the layout, event processing, and drawing.
#[allow(missing_debug_implementations)]
pub struct MenuBar<'a, Message, Renderer = crate::Renderer>
@ -212,46 +288,8 @@ where
iced_core::Size::new(self.width, self.height)
}
#[allow(invalid_reference_casting)]
fn diff(&mut self, tree: &mut Tree) {
if tree.children.len() > self.menu_roots.len() {
tree.children.truncate(self.menu_roots.len());
}
tree.children
.iter_mut()
.zip(self.menu_roots.iter())
.for_each(|(t, root)| {
let mut flat = root
.flattern()
.iter()
.map(|mt| {
let widget = mt.item.as_widget();
let widget_ptr =
widget as *const dyn Widget<Message, crate::Theme, Renderer>;
let widget_ptr_mut =
widget_ptr as *mut dyn Widget<Message, crate::Theme, Renderer>;
//TODO: find a way to diff_children without unsafe code
unsafe { &mut *widget_ptr_mut }
})
.collect::<Vec<_>>();
t.diff_children(flat.as_mut_slice());
});
if tree.children.len() < self.menu_roots.len() {
let extended = self.menu_roots[tree.children.len()..].iter().map(|root| {
let mut tree = Tree::empty();
let flat = root
.flattern()
.iter()
.map(|mt| Tree::new(mt.item.as_widget()))
.collect();
tree.children = flat;
tree
});
tree.children.extend(extended);
}
menu_roots_diff(&mut self.menu_roots, tree);
}
fn tag(&self) -> tree::Tag {
@ -263,28 +301,7 @@ where
}
fn children(&self) -> Vec<Tree> {
/*
menu bar
menu root 1 (stateless)
flat tree
menu root 2 (stateless)
flat tree
...
*/
self.menu_roots
.iter()
.map(|root| {
let mut tree = Tree::empty();
let flat = root
.flattern()
.iter()
.map(|mt| Tree::new(mt.item.as_widget()))
.collect();
tree.children = flat;
tree
})
.collect()
menu_roots_children(&self.menu_roots)
}
fn layout(&self, tree: &mut Tree, renderer: &Renderer, limits: &Limits) -> Node {