buildWidgetContent method

Implementation

@override
Widget buildWidgetContent(BuildContext context) {
  final Widget content;
  if (errorMsg.isNotEmpty) {
    content = Scaffold(
      backgroundColor: Colors.black,
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Text(
            errorMsg,
            style: const TextStyle(
                color: Colors.red,
                fontSize: 16.0,
                fontWeight: FontWeight.bold),
            textAlign: TextAlign.center,
          ),
        ),
      ),
    );
  } else if (nclDocument == null && _cachedWidgets.isEmpty) {
    content = Scaffold(
      backgroundColor: Colors.transparent,
      body: Center(
        child: errorMsg.isNotEmpty
            ? Text(errorMsg, style: const TextStyle(color: Colors.red))
            : const CircularProgressIndicator(),
      ),
    );
  } else {
    final activeMedia = List<Media>.from(nclDocument?.getActiveMedia() ?? []);
    activeMedia.sort((a, b) {
      int getZIndex(Media media) {
        final zIndexProp = media
            .getProperties()
            .where((p) => p.name == 'zIndex' || p.name == 'zOrder')
            .firstOrNull;
        if (zIndexProp != null && zIndexProp.value != null) {
          return int.tryParse(zIndexProp.value!) ?? 0;
        }
        final resolvedZ = media.rawAttributes['resolvedZIndex'];
        if (resolvedZ != null) {
          return int.tryParse(resolvedZ) ?? 0;
        }
        return 0;
      }

      return getZIndex(a).compareTo(getZIndex(b));
    });

    final List<Widget> children = [];
    for (var media in activeMedia) {
      final widget = _cachedWidgets[media.id ?? ''];
      if (widget != null) {
        children.add(widget);
      }
    }

    content = Scaffold(
      backgroundColor: Colors.transparent,
      body: Stack(
        key: const Key('ncl_app_stack'),
        fit: StackFit.expand,
        children: children,
      ),
    );
  }

  return _NclInheritedWidget(
    state: this,
    bounds: bounds,
    child: content,
  );
}