Function zng_wgt_input::is_pointer_pressed

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

P If is_mouse_pressed or is_touched_from_start.

Note that is_mouse_pressed and is_touched_from_start do not consider pointer capture, use is_cap_pointer_pressed to include the captured state.