Type Alias ViewDrawCallback 

pub type ViewDrawCallback = Option<unsafe extern "C" fn(canvas: *mut Canvas, model: *mut c_void)>;

View Draw callback

Arguments

• canvas - pointer to canvas
• model - pointer to model called from GUI thread

Aliased Type

pub enum ViewDrawCallback {
    None,
    Some(unsafe extern "C" fn(*mut Canvas, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut Canvas, *mut c_void))

Some value of type T.