appBar method

Widget appBar(BuildContext context)

AppBar widget. 顶栏部件

Implementation

Widget appBar(BuildContext context) {
  return AssetPickerAppBar(
    leading: Semantics(
      sortKey: ordinalSortKey(0),
      child: IconButton(
        onPressed: Navigator.of(context).maybePop,
        tooltip: MaterialLocalizations.of(context).closeButtonTooltip,
        icon: Icon(
          Icons.close,
          semanticLabel: MaterialLocalizations.of(context).closeButtonTooltip,
        ),
      ),
    ),
    centerTitle: true,
    title: specialPickerType == null
        ? Semantics(
            sortKey: ordinalSortKey(0.1),
            child: StreamBuilder<int>(
              initialData: currentIndex,
              stream: pageStreamController.stream,
              builder: (_, AsyncSnapshot<int> snapshot) => ScaleText(
                '${snapshot.requireData + 1}/${previewAssets.length}',
                style: const TextStyle(
                  fontSize: 17,
                  fontWeight: FontWeight.w500,
                ),
              ),
            ),
          )
        : null,
    actions: [
      if (provider != null)
        Semantics(
          sortKey: ordinalSortKey(0.2),
          child: selectButton(context),
        ),
      const SizedBox(width: 14),
    ],
  );
}