Trait WidgetExtManual 

pub trait WidgetExtManual: IsA<Widget> + 'static {
    // Provided method
    fn add_tick_callback<P: Fn(&Self, &FrameClock) -> ControlFlow + 'static>(
        &self,
        callback: P,
    ) -> TickCallbackId { ... }
}

Trait containing manually implemented methods of Widget.

Provided Methods

fn add_tick_callback<P: Fn(&Self, &FrameClock) -> ControlFlow + 'static>( &self, callback: P, ) -> TickCallbackId

t changing widget properties that would trigger that (for example, changing the text of a label), then you will have to call WidgetExt::queue_resize() or WidgetExt::queue_draw() yourself.

FrameClock::frame_time() should generally be used for timing continuous animations and Gdk::FrameTimings::get_predicted_presentation_time() should be used if you are trying to display isolated frames at particular times.

This is a more convenient alternative to connecting directly to the update signal of the frame clock, since you don’t have to worry about when a frame clock is assigned to a widget.

To remove a tick callback, pass the ID that is returned by this function to [WidgetExtManual::remove()][crate::prelude::WidgetExtManual::remove()]. Tick callbacks will be removed automatically when the widget is destroyed, so you do not have to remove it yourself.

callback

function to call for updating animations

Returns

an ID for this callback

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<O: IsA<Widget>> WidgetExtManual for O