Function is_touched 

pub fn is_touched(child: impl IntoUiNode, state: impl IntoVar<bool>) -> UiNode

P If a touch contact point is over the widget or a descendant and the it is enabled.

This state property does not consider pointer capture, if the pointer is captured by the widget but is not actually over the widget this is false, use is_cap_touched to include the captured state.

This state property also does not consider where the touch started, if it started in a different widget and is not over this widget the widget is touched, use is_touched_from_start to ignore touched that move in.

The value is always false when the widget is not ENABLED.