pub struct SampleComponent {}
Expand description

This an example of the API that is generated for a component in .slint design markup. This may help you understand what functions you can call and how you can pass data in and out. This is the source code:

export component SampleComponent inherits Window {
    in-out property<int> counter;
    // note that dashes will be replaced by underscores in the generated code
    in-out property<string> user-name;
    callback hello();
    // ... maybe more elements here
}

Implementations§

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impl SampleComponent

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pub fn new() -> Result<Self, PlatformError>

Creates a new instance that is reference counted and pinned in memory.

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pub fn get_counter(&self) -> i32

A getter is generated for each property declared at the root of the component. In this case, this is the getter that returns the value of the counter property declared in the .slint design markup.

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pub fn set_counter(&self, value: i32)

A setter is generated for each property declared at the root of the component, In this case, this is the setter that sets the value of the counter property declared in the .slint design markup.

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pub fn get_user_name(&self) -> SharedString

Returns the value of the user_name property declared in the .slint design markup.

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pub fn set_user_name(&self, value: SharedString)

Assigns a new value to the user_name property.

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pub fn invoke_hello(&self)

For each callback declared at the root of the component, a function to call that callback is generated. This is the function that calls the hello callback declared in the .slint design markup.

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pub fn on_hello(&self, f: impl Fn() + 'static)

For each callback declared at the root of the component, a function connect to that callback is generated. This is the function that registers the function f as callback when the callback hello is emitted. In order to access the component in the callback, you’d typically capture a weak reference obtained using ComponentHandle::as_weak and then upgrade it to a strong reference when the callback is run:

    let sample = SampleComponent::new().unwrap();
    let sample_weak = sample.as_weak();
    sample.as_ref().on_hello(move || {
        let sample = sample_weak.unwrap();
        sample.as_ref().set_counter(42);
    });

Trait Implementations§

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impl Clone for SampleComponent

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fn clone(&self) -> SampleComponent

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl ComponentHandle for SampleComponent

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fn as_weak(&self) -> Weak<Self>

Returns a new weak pointer.

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fn clone_strong(&self) -> Self

Returns a clone of this handle that’s a strong reference.

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fn show(&self) -> Result<(), PlatformError>

Marks the window of this component to be shown on the screen. This registers the window with the windowing system. In order to react to events from the windowing system, such as draw requests or mouse/touch input, it is still necessary to spin the event loop, using crate::run_event_loop.

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fn hide(&self) -> Result<(), PlatformError>

Marks the window of this component to be hidden on the screen. This de-registers the window from the windowing system and it will not receive any further events.

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fn window(&self) -> &Window

Returns the Window associated with this component. The window API can be used to control different aspects of the integration into the windowing system, such as the position on the screen.

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fn run(&self) -> Result<(), PlatformError>

This is a convenience function that first calls Self::show, followed by crate::run_event_loop() and Self::hide.

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fn global<'a, T: Global<'a, Self>>(&'a self) -> T

This function provides access to instances of global singletons exported in .slint.

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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,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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Mutably borrows from an owned value. Read more
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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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Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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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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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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Dereferences the given pointer. Read more
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Drops the object pointed to by the given pointer. Read more
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type Output = T

Should always be Self
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The resulting type after obtaining ownership.
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