Macro widget_set_rect 

widget_set_rect!() { /* proc-macro */ }

Macro to set the rect stored in the widget core

Widgets have a hidden field of type Rect in their widget_core!(), used to implement method Layout::rect. This macro assigns to that field.

This macro is usable only within the definition of Layout::set_rect within an impl_self, impl_scope! or impl_anon! macro using the widget attribute.

The method Layout::rect will be generated if this macro is used by the widget, otherwise a definition of the method must be provided.

Example usage:

fn set_rect(&mut self, _: &mut ConfigCx, rect: Rect, _: AlignHints) {
    widget_set_rect!(rect);
}