Struct raui_core::application::ProcessContext

pub struct ProcessContext<'a> { /* fields omitted */ }

Allows you to get mutable or immutable references to data exposed by the host of the RAUI application

This allows RAUI hosts to provide the UI with direct access to application data, if necessary, instead of using DataBindings.

See Application::process for more information.

Implementations

impl<'a> ProcessContext<'a>

pub fn new() -> Self

Create an empty ProcessContext

pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T>

Can be used to get mutable access to application data provided by the RAUI host.

Example

fn my_component(ctx: WidgetContext) -> WidgetNode {
    let app_data = ctx.process_context.get_mut::<AppData>().unwrap();
    let counter = &mut app_data.counter;
    *counter += 1;

    // widget stuff...
}

pub fn insert_mut<T: 'static>(&mut self, item: &'a mut T) -> &mut Self

Allows RAUI hosts to add mutable references to application data to the process_context that is available to widget components.

See Application::process for more information.

pub fn get<T: 'static>(&mut self) -> Option<&T>

Can be used to get immutable access to application data provided by the RAUI host.

Example

fn my_component(ctx: WidgetContext) -> WidgetNode {
    let app_data = ctx.process_context.get::<AppData>().unwrap();
    let counter = app_data.counter;

    // widget stuff...
}

pub fn insert<T: 'static>(&mut self, item: &'a T) -> &mut Self

Allows RAUI hosts to add immutable references to application data to the process_context that is available to widget components.

See Application::process for more information.

Trait Implementations

impl<'a> Debug for ProcessContext<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Default for ProcessContext<'a>

fn default() -> ProcessContext<'a>

Returns the “default value” for a type.