widget_state_is_state

zng::widget::node

Function widget_state_is_state 

Source 
pub fn widget_state_is_state(
    child: impl IntoUiNode,
    predicate: impl Fn(StateMapRef<'_, WIDGET>) -> bool + Send + 'static,
    deinit: impl Fn(StateMapRef<'_, WIDGET>) -> bool + Send + 'static,
    state: impl IntoVar<bool>,
) -> UiNode
Expand description

Helper for declaring state properties that are controlled by values in the widget state map.

The predicate closure is called with the widget state on init and every update, if the returned value changes the state updates. The deinit closure is called on deinit to get the reset value.