[−][src]Trait iced_native::overlay::Overlay

pub trait Overlay<Message, Renderer> where
    Renderer: Renderer, {
    pub fn layout(
        &self, 
        renderer: &Renderer, 
        bounds: Size, 
        position: Point
    ) -> Node;

    pub fn draw(
        &self, 
        renderer: &mut Renderer, 
        defaults: &Renderer::Defaults, 
        layout: Layout<'_>, 
        cursor_position: Point
    ) -> Renderer::Output;

    pub fn hash_layout(&self, state: &mut Hasher, position: Point);

    pub fn on_event(
        &mut self, 
        _event: Event, 
        _layout: Layout<'_>, 
        _cursor_position: Point, 
        _messages: &mut Vec<Message>, 
        _renderer: &Renderer, 
        _clipboard: Option<&dyn Clipboard>
    ) -> Status { ... }
}

An interactive component that can be displayed on top of other widgets.

Required methods

pub fn layout(&self, renderer: &Renderer, bounds: Size, position: Point) -> Node[src]

Returns the layout Node of the Overlay.

This Node is used by the runtime to compute the Layout of the user interface.

pub fn draw(
    &self,
    renderer: &mut Renderer,
    defaults: &Renderer::Defaults,
    layout: Layout<'_>,
    cursor_position: Point
) -> Renderer::Output[src]

Draws the Overlay using the associated Renderer.

pub fn hash_layout(&self, state: &mut Hasher, position: Point)[src]

Computes the layout hash of the Overlay.

The produced hash is used by the runtime to decide if the Layout needs to be recomputed between frames. Therefore, to ensure maximum efficiency, the hash should only be affected by the properties of the Overlay that can affect layouting.

For example, the Text widget does not hash its color property, as its value cannot affect the overall Layout of the user interface.

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Provided methods

pub fn on_event(
    &mut self,
    _event: Event,
    _layout: Layout<'_>,
    _cursor_position: Point,
    _messages: &mut Vec<Message>,
    _renderer: &Renderer,
    _clipboard: Option<&dyn Clipboard>
) -> Status[src]

Processes a runtime Event.

It receives:

  • an Event describing user interaction
  • the computed Layout of the Overlay
  • the current cursor position
  • a mutable Message list, allowing the Overlay to produce new messages based on user interaction.
  • the Renderer
  • a Clipboard, if available

By default, it does nothing.

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Implementors

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