Trait EventTarget 

pub trait EventTarget: Widget + Sized {
    // Provided methods
    fn on(
        self,
        code: lv_event_code_t,
        cb: lv_event_cb_t,
        user_data: *mut c_void,
    ) -> Self { ... }
    fn on_click(self, cb: lv_event_cb_t, user_data: *mut c_void) -> Self { ... }
    fn on_value_changed(self, cb: lv_event_cb_t, user_data: *mut c_void) -> Self { ... }
}

Event callback registration. Uses fn pointers for no_std compatibility. Blanket-implemented for all Widget types.

Provided Methods

fn on( self, code: lv_event_code_t, cb: lv_event_cb_t, user_data: *mut c_void, ) -> Self

Register a callback for an arbitrary LVGL event code.

code is any LV_EVENT_* constant. user_data is passed through to cb unchanged.

fn on_click(self, cb: lv_event_cb_t, user_data: *mut c_void) -> Self

Register a callback for click (LV_EVENT_CLICKED) events.

fn on_value_changed(self, cb: lv_event_cb_t, user_data: *mut c_void) -> Self

Register a callback for value-changed (LV_EVENT_VALUE_CHANGED) events.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T: Widget> EventTarget for T