pathEntityWidget method

@override Widget pathEntityWidget({ required BuildContext context, required Map<AssetPathEntity, Uint8List?> list, required int index, bool isAudio = false, })

Item widgets for path entity selector. 路径单独条目选择组件

Implementation

@override
Widget pathEntityWidget({
  required BuildContext context,
  required Map<AssetPathEntity, Uint8List?> list,
  required int index,
  bool isAudio = false,
}) {
  final AssetPathEntity pathEntity = list.keys.elementAt(index);
  final Uint8List? data = list.values.elementAt(index);

  Widget builder() {
    if (isAudio) {
      return ColoredBox(
        color: theme.colorScheme.primary.withOpacity(0.12),
        child: const Center(child: Icon(Icons.audiotrack)),
      );
    }

    // The reason that the `thumbData` should be checked at here to see if it
    // is null is that even the image file is not exist, the `File` can still
    // returned as it exist, which will cause the thumb bytes return null.
    //
    // 此处需要检查缩略图为空的原因是：尽管文件可能已经被删除，
    // 但通过 `File` 读取的文件对象仍然存在，使得返回的数据为空。
    if (data != null) {
      return Image.memory(data, fit: BoxFit.cover);
    }
    return ColoredBox(color: theme.colorScheme.primary.withOpacity(0.12));
  }

  final String pathName =
      pathNameBuilder?.call(pathEntity) ?? pathEntity.name;
  final String name = isPermissionLimited && pathEntity.isAll
      ? textDelegate.accessiblePathName
      : pathName;
  final String semanticsName = isPermissionLimited && pathEntity.isAll
      ? semanticsTextDelegate.accessiblePathName
      : pathName;
  final String semanticsCount = '${pathEntity.assetCount}';
  return Selector<DefaultAssetPickerProvider, AssetPathEntity?>(
    selector: (_, DefaultAssetPickerProvider p) => p.currentPath,
    builder: (_, AssetPathEntity? currentPathEntity, __) {
      final bool isSelected = currentPathEntity == pathEntity;
      return Semantics(
        label: '$semanticsName, '
            '${semanticsTextDelegate.sUnitAssetCountLabel}: '
            '$semanticsCount',
        selected: isSelected,
        onTapHint: semanticsTextDelegate.sActionSwitchPathLabel,
        button: false,
        child: Material(
          type: MaterialType.transparency,
          child: InkWell(
            splashFactory: InkSplash.splashFactory,
            onTap: () {
              Feedback.forTap(context);
              context
                  .read<DefaultAssetPickerProvider>()
                  .switchPath(pathEntity);
              isSwitchingPath.value = false;
              gridScrollController.jumpTo(0);
            },
            child: SizedBox(
              height: isAppleOS ? 64 : 52,
              child: Row(
                children: <Widget>[
                  RepaintBoundary(
                    child: AspectRatio(aspectRatio: 1, child: builder()),
                  ),
                  Expanded(
                    child: Padding(
                      padding: const EdgeInsetsDirectional.only(
                        start: 15,
                        end: 20,
                      ),
                      child: ExcludeSemantics(
                        child: Row(
                          children: <Widget>[
                            Flexible(
                              child: Padding(
                                padding: const EdgeInsetsDirectional.only(
                                  end: 10,
                                ),
                                child: ScaleText(
                                  name,
                                  style: const TextStyle(fontSize: 17),
                                  maxLines: 1,
                                  overflow: TextOverflow.ellipsis,
                                ),
                              ),
                            ),
                            ScaleText(
                              '($semanticsCount)',
                              style: TextStyle(
                                color: theme.textTheme.caption?.color,
                                fontSize: 17,
                              ),
                              maxLines: 1,
                              overflow: TextOverflow.ellipsis,
                            ),
                          ],
                        ),
                      ),
                    ),
                  ),
                  if (isSelected)
                    AspectRatio(
                      aspectRatio: 1,
                      child: Icon(Icons.check, color: themeColor, size: 26),
                    ),
                ],
              ),
            ),
          ),
        ),
      );
    },
  );
}