DropDown

A drop-down list (GuiElementType::DropDown).

use factorio_rs::factorio_api::lua_fn;
use factorio_rs_gui::shared::drop_down::DropDown;

let on_pick = lua_fn(move |event: OnGuiSelectionStateChangedEvent| {
    let _ = event;
});

DropDown::new(vec!["A".into(), "B".into(), "C".into()])
    .selected_index(1)
    .on_selection_changed(on_pick)

selected_index is 1-based (Factorio convention).

Builder API

Method	Effect
new(Vec<String>)	Items
name(&str)	Optional stable element name
selected_index(u32)	Initial selection (1-based)
on_selection_changed(LuaFunction)	on_gui_selection_state_changed

See Lifecycle.