widgets.on

Syntax

ue.widgets.on(widget: UObjectProxy, event_name: string, callback: function, options?: table) -> integer?, string?

Parameter	Type	Description
`widget`	`UObjectProxy`	Widget to observe.
`event_name`	`string`	Supported event name; optional `on_` prefix.
`callback`	`function(value, old_value, widget, id, event)`	Called when state changes.
`options.immediate`	`boolean?`	Deliver current state on the next tick.

Type	Description
`integer`	Widget binding ID.
`nil, string`	Widget, event, or state getter is unsupported.

local click_id = assert(ue.widgets.on(
    button,
    "clicked",
    function(value, old_value, widget)
        print(widget:name())
    end
))

Convenience helpers include on_click, on_pressed, on_released, on_hover, on_unhover, on_focus, on_blur, on_mouse_capture, on_mouse_capture_lost, on_value_changed, on_check_state_changed, on_selection_changed, on_text_changed, on_visibility_changed, and on_enabled_changed.