[−][src]Trait wayland_protocols::viewporter::server::wp_viewport::RequestHandler

pub trait RequestHandler {
    fn destroy(&mut self, object: WpViewport) { ... }
    fn set_source(
        &mut self, 
        object: WpViewport, 
        x: f64, 
        y: f64, 
        width: f64, 
        height: f64
    ) { ... }
    fn set_destination(&mut self, object: WpViewport, width: i32, height: i32) { ... }
}

An interface for handling requests.

Provided methods

`fn destroy(&mut self, object: WpViewport)`

remove scaling and cropping from the surface

The associated wl_surface's crop and scale state is removed. The change is applied on the next wl_surface.commit.

This is a destructor, you cannot send requests to this object any longer once this method is called.

`fn set_source( &mut self, object: WpViewport, x: f64, y: f64, width: f64, height: f64 )`

set the source rectangle for cropping

Set the source rectangle of the associated wl_surface. See wp_viewport for the description, and relation to the wl_buffer size.

If all of x, y, width and height are -1.0, the source rectangle is unset instead. Any other set of values where width or height are zero or negative, or x or y are negative, raise the bad_value protocol error.

The crop and scale state is double-buffered state, and will be applied on the next wl_surface.commit.

`fn set_destination(&mut self, object: WpViewport, width: i32, height: i32)`

set the surface size for scaling

Set the destination size of the associated wl_surface. See wp_viewport for the description, and relation to the wl_buffer size.

If width is -1 and height is -1, the destination size is unset instead. Any other pair of values for width and height that contains zero or negative values raises the bad_value protocol error.

The crop and scale state is double-buffered state, and will be applied on the next wl_surface.commit.

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Implementors