Enum wayland_server_protocol::wl_pointer::Request

pub enum Request {
    SetCursor {
        serial: u32,
        surface: ObjectId,
        hotspot_x: i32,
        hotspot_y: i32,
    },
    Release,
}

Variants

SetCursor

set the pointer surface

Set the pointer surface, i.e., the surface that contains the pointer image (cursor). This request gives the surface the role of a cursor. If the surface already has another role, it raises a protocol error.

The cursor actually changes only if the pointer focus for this device is one of the requesting client’s surfaces or the surface parameter is the current pointer surface. If there was a previous surface set with this request it is replaced. If surface is NULL, the pointer image is hidden.

The parameters hotspot_x and hotspot_y define the position of the pointer surface relative to the pointer location. Its top-left corner is always at (x, y) - (hotspot_x, hotspot_y), where (x, y) are the coordinates of the pointer location, in surface-local coordinates.

On surface.attach requests to the pointer surface, hotspot_x and hotspot_y are decremented by the x and y parameters passed to the request. Attach must be confirmed by wl_surface.commit as usual.

The hotspot can also be updated by passing the currently set pointer surface to this request with new values for hotspot_x and hotspot_y.

The current and pending input regions of the wl_surface are cleared, and wl_surface.set_input_region is ignored until the wl_surface is no longer used as the cursor. When the use as a cursor ends, the current and pending input regions become undefined, and the wl_surface is unmapped.

Fields

serial: u32

serial number of the enter event

surface: ObjectId

pointer surface

hotspot_x: i32

surface-local x coordinate

hotspot_y: i32

surface-local y coordinate

Release

release the pointer object

Using this request a client can tell the server that it is not going to use the pointer object anymore.

This request destroys the pointer proxy object, so clients must not call wl_pointer_destroy() after using this request.

Trait Implementations

impl Debug for Request

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

Formats the value using the given formatter.

impl FromArgs for Request

fn from_args(op: u16, args: Vec<Arg>) -> Result<Self, Error>

Consumes |args| creates an instance of self.

impl MessageType for Request

fn log(&self, this: ObjectId) -> String

Generates a string suitable for protocol logging this message.

fn message_name(&self) -> &'static CStr

Returns a static CStr reference that describes the interface/method of this message.