triggerRefresh method

Future<void> triggerRefresh(Future<void> onRefresh())

Implementation

Future<void> triggerRefresh(Future<void> Function() onRefresh) async {
  if (isRefreshing.value) return;

  if (enableHaptics) {
    HapticFeedback.mediumImpact();
  }

  hasThresholdBeenReached.value = false;
  isRefreshing.value = true;

  // Lock the header to a stable, visible height so the loader is always
  // shown regardless of how the underlying physics settle.
  await animateToOffset(settleDistance);
  tickerController.repeat();

  final DateTime started = DateTime.now();
  try {
    await onRefresh();
  } finally {
    // Keep the indicator visible for at least [refreshDuration] (3-5s) so the
    // premium animation runs fully, accounting for time already spent.
    final Duration elapsed = DateTime.now().difference(started);
    if (elapsed < refreshDuration) {
      await Future.delayed(refreshDuration - elapsed);
    }

    tickerController.stop();
    tickerController.reset();

    // Collapse the header up smoothly (loader slides away).
    await snapBack(0.0);

    // Then bring the list content to the very top.
    if (scrollController != null &&
        scrollController!.hasClients &&
        scrollController!.offset > 0) {
      await scrollController!.animateTo(
        0.0,
        duration: const Duration(milliseconds: 500),
        curve: Curves.easeInOutCubic,
      );
    }

    isRefreshing.value = false;
    hasSelectionHapticFired.value = false;
  }
}