Struct wayland_cursor::CursorTheme

pub struct CursorTheme { /* private fields */ }

Represents a cursor theme loaded from the system.

Implementations

impl CursorTheme

pub fn load(conn: &Connection, shm: WlShm, size: u32) -> Result<Self, InvalidId>

Load a cursor theme from system defaults.

Same as calling the following:

CursorTheme::load_or(conn, shm, "default", size)

pub fn load_or( conn: &Connection, shm: WlShm, name: &str, size: u32, ) -> Result<Self, InvalidId>

Load a cursor theme, using name as fallback.

The theme name and cursor size are read from the XCURSOR_THEME and XCURSOR_SIZE environment variables, respectively, or from the provided variables if those are invalid.

pub fn load_from_name( conn: &Connection, shm: WlShm, name: &str, size: u32, ) -> Result<Self, InvalidId>

Create a new cursor theme, ignoring the system defaults.

pub fn get_cursor(&mut self, name: &str) -> Option<&Cursor>

Retrieve a cursor from the theme.

This method returns None if this cursor is not provided either by the theme, or by one of its parents.

If a fallback is set, it will use the data returned by the fallback.

pub fn set_fallback<F>(&mut self, fallback: F)

where F: Fn(&str, u32) -> Option<Cow<'static, [u8]>> + Send + Sync + 'static,

Set a fallback to load the cursor data, in case the system theme is missing a cursor that you need.

Your fallback will be invoked with the name and size of the requested cursor and should return a byte array with the contents of an xcursor file, or None if you don’t provide a fallback for this cursor.

For example, this defines a generic fallback cursor image and uses it for all missing cursors:

use wayland_cursor::CursorTheme;
use wayland_client::{Connection, backend::InvalidId, protocol::wl_shm};
fn example(conn: &Connection, shm: wl_shm::WlShm, size: u32) -> Result<CursorTheme, InvalidId> {
  let mut theme = CursorTheme::load_or(conn, shm, "default", size)?;
  theme.set_fallback(|name, size| {
      include_bytes!("./icons/default")
  });
  Ok(theme)
}

Trait Implementations

impl Debug for CursorTheme

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

Formats the value using the given formatter.