Trait ComponentHandle

pub trait ComponentHandle {
    // Required methods
    fn as_weak(&self) -> Weak<Self>
       where Self: Sized;
    fn clone_strong(&self) -> Self;
    fn show(&self) -> Result<(), PlatformError>;
    fn hide(&self) -> Result<(), PlatformError>;
    fn window(&self) -> &Window;
    fn run(&self) -> Result<(), PlatformError>;
    fn global<'a, T: Global<'a, Self>>(&'a self) -> T
       where Self: Sized;
}

This trait describes the common public API of a strongly referenced Slint component. It allows creating strongly-referenced clones, a conversion into/ a weak pointer as well as other convenience functions.

This trait is implemented by the generated component

Required Methods

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

where Self: Sized,

Returns a new weak pointer.

fn clone_strong(&self) -> Self

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

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

Convenience function for crate::Window::show(). This shows the window on the screen and maintains an extra strong reference while the window is visible. 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.

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

Convenience function for crate::Window::hide(). Hides the window, so that it is not visible anymore. The additional strong reference on the associated component, that was created when show() was called, is dropped.

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.

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

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

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

where Self: Sized,

This function provides access to instances of global singletons exported in .slint. See Global for an example how to export and access globals from .slint markup.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors