ExpanderController constructor

ExpanderController({
  1. bool initiallyExpanded = false,
})

Creates an ExpanderController with an optional initial expanded state.

The initiallyExpanded parameter determines if the expander starts in the open state. Defaults to false (collapsed) for compact initial layouts. Initializes the internal ValueNotifier for reactive state tracking.

Implementation

ExpanderController({bool initiallyExpanded = false})
    : expanded = ValueNotifier(initiallyExpanded);