selectItem method

void selectItem(Object item, { required int itemIndex, required Rect originRect, required Size screenSize, })

Select an item and begin the appear animation.

item — data object for the tapped item. itemIndex — index of the tapped item in the items list. originRect — global rect of the tapped widget. screenSize — viewport size for rect computation.

Implementation

void selectItem(
  Object item, {
  required int itemIndex,
  required Rect originRect,
  required Size screenSize,
}) {
  if (_state.phase != OverlayPhase.idle) return;

  final fullRect = Rect.fromLTWH(0, 0, screenSize.width, screenSize.height);
  final cRect = _computeCardRect(screenSize);

  _pendingFullDismiss = false;
  _verticalIntent = _VerticalIntent.none;
  _overlayController.value = 0.0;
  _expandController.value = 0.0;

  _state = OverlayMorphState(
    overlayProgress: 0.0,
    expandProgress: 0.0,
    phase: OverlayPhase.appearing,
    currentIndex: _state.itemCount > 0
        ? itemIndex.clamp(0, _state.itemCount - 1)
        : 0,
    itemCount: _state.itemCount,
    selectedItem: item,
    originRect: originRect,
    cardRect: cRect,
    fullscreenRect: fullRect,
    isAnimating: true,
  );
  notifyListeners();

  _overlayController.animateTo(1.0, curve: appearCurve);
}