Struct slint::MapModel

pub struct MapModel<M, F> { /* private fields */ }
Expand description

Provides rows that are generated by a map function based on the rows of another Model

When the other Model is updated, the MapModel is updated accordingly.

Generic parameters:

  • M the type of the wrapped Model.
  • F the map function.

Example

Here we have a VecModel holding rows of a custom type Name. It is then mapped into a MapModel of SharedStrings

#[derive(Clone)]
struct Name {
    first: String,
    last: String,
}

let model = VecModel::from(vec![
    Name { first: "Hans".to_string(), last: "Emil".to_string() },
    Name { first: "Max".to_string(), last: "Mustermann".to_string() },
    Name { first: "Roman".to_string(), last: "Tisch".to_string() },
]);

let mapped_model = MapModel::new(model, |n|
    slint::format!("{}, {}", n.last, n.first)
);

assert_eq!(mapped_model.row_data(0).unwrap(), SharedString::from("Emil, Hans"));
assert_eq!(mapped_model.row_data(1).unwrap(), SharedString::from("Mustermann, Max"));
assert_eq!(mapped_model.row_data(2).unwrap(), SharedString::from("Tisch, Roman"));

Alternatively you can use the shortcut ModelExt::map.

let mapped_model = VecModel::from(vec![
    Name { first: "Hans".to_string(), last: "Emil".to_string() },
    Name { first: "Max".to_string(), last: "Mustermann".to_string() },
    Name { first: "Roman".to_string(), last: "Tisch".to_string() },
])
.map(|n| slint::format!("{}, {}", n.last, n.first));

If you want to modify the underlying VecModel you can give it a Rc of the MapModel:

let model = Rc::new(VecModel::from(vec![
    Name { first: "Hans".to_string(), last: "Emil".to_string() },
    Name { first: "Max".to_string(), last: "Mustermann".to_string() },
    Name { first: "Roman".to_string(), last: "Tisch".to_string() },
]));

let mapped_model = MapModel::new(model.clone(), |n|
    slint::format!("{}, {}", n.last, n.first)
);

model.set_row_data(1, Name { first: "Minnie".to_string(), last: "Musterfrau".to_string() });

assert_eq!(mapped_model.row_data(0).unwrap(), SharedString::from("Emil, Hans"));
assert_eq!(mapped_model.row_data(1).unwrap(), SharedString::from("Musterfrau, Minnie"));
assert_eq!(mapped_model.row_data(2).unwrap(), SharedString::from("Tisch, Roman"));

Implementations§

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impl<M, F, T, U> MapModel<M, F>where M: 'static + Model<Data = T>, F: 'static + Fn(T) -> U,

pub fn new(model: M, map_function: F) -> MapModel<M, F>

Trait Implementations§

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impl<M, F, T, U> Model for MapModel<M, F>where M: 'static + Model<Data = T>, F: 'static + Fn(T) -> U,

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type Data = U

The model data: A model is a set of row and each row has this data
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fn row_count(&self) -> usize

The amount of row in the model
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fn row_data(&self, row: usize) -> Option<<MapModel<M, F> as Model>::Data>

Returns the data for a particular row. This function should be called with row < row_count(). Read more
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fn model_tracker(&self) -> &dyn ModelTracker

The implementation should return a reference to its ModelNotify field. Read more
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fn as_any(&self) -> &(dyn Any + 'static)

Return something that can be downcast’ed (typically self) Read more
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fn set_row_data(&self, _row: usize, _data: Self::Data)

Sets the data for a particular row. Read more
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fn iter(&self) -> ModelIterator<'_, Self::Data> where Self: Sized,

Returns an iterator visiting all elements of the model.

Auto Trait Implementations§

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impl<M, F> RefUnwindSafe for MapModel<M, F>where F: RefUnwindSafe, M: RefUnwindSafe,

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impl<M, F> Send for MapModel<M, F>where F: Send, M: Send,

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impl<M, F> Sync for MapModel<M, F>where F: Sync, M: Sync,

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impl<M, F> Unpin for MapModel<M, F>where F: Unpin, M: Unpin,

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impl<M, F> UnwindSafe for MapModel<M, F>where F: UnwindSafe, M: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Downcast for Twhere T: Any,

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fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for Twhere T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send + 'static>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ModelExt for Twhere T: Model,

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fn row_data_tracked(&self, row: usize) -> Option<Self::Data>

Convenience function that calls ModelTracker::track_row_data_changes before returning Model::row_data. Read more
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fn map<F, U>(self, map_function: F) -> MapModel<Self, F>where Self: Sized + 'static, F: Fn(Self::Data) -> U + 'static,

Returns a new Model where all elements are mapped by the function map_function. This is a shortcut for MapModel::new().
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fn filter<F>(self, filter_function: F) -> FilterModel<Self, F>where Self: Sized + 'static, F: Fn(&Self::Data) -> bool + 'static,

Returns a new Model where the elements are filtered by the function filter_function. This is a shortcut for FilterModel::new().
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fn sort(self) -> SortModel<Self, AscendingSortHelper>where Self: Sized + 'static, Self::Data: Ord,

Returns a new Model where the elements are sorted ascending. This is a shortcut for SortModel::new_ascending().
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fn sort_by<F>(self, sort_function: F) -> SortModel<Self, F>where Self: Sized + 'static, F: FnMut(&Self::Data, &Self::Data) -> Ordering + 'static,

Returns a new Model where the elements are sorted by the function sort_function. This is a shortcut for SortModel::new().
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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.