# hold.ludic - on-hold: every frame a control is held down - by the pointer (wherever it goes until it
# is let go), or by Enter or the pad's A on the focus - with event.dt, the seconds since the last
# frame, and event.t, how long it has been held, on the ui clock
function hd_ev_new() -> Val {
  let v = Value.object()
  value_set_float(v, "dt", 0.0)                  # its keys made with the state, so a first hold grows nothing
  value_set_float(v, "t", 0.0)
  return v
}
function hd_tick(ui_st: mut UiState, root: UiNode) -> void {
  var key = ui_st.fr_key_press
  if ui_st.fr_press_key != "" and ui_st.in_now.down { key = ui_st.fr_press_key }
  if key == "" {
    ui_st.hd_key = ""
    return
  }
  let now = an_now(ui_st)
  if key != ui_st.hd_key {
    ui_st.hd_key = key
    ui_st.hd_t0 = now
    ui_st.hd_last = now
  }
  let n = fr_node(root, key)
  if n != null {
    let v = ui_st.hd_ev                        # one object kept with the state, filled in place each held frame
    value_set_float(v, "dt", now - ui_st.hd_last)
    value_set_float(v, "t", now - ui_st.hd_t0)
    ui_fire(ui_st, n, "hold", v)
  }
  ui_st.hd_last = now
}