buildContent method

@override Widget buildContent(BuildContext context)

子类需要实现的方法：构建主体内容

Implementation

@override
Widget buildContent(BuildContext context) {
  return Container(
    height: kToolbarHeight,
    color: Colors.black.withOpacity(0.3),
    child: Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        // 返回按钮
        IconButton(
          icon: const Icon(
            Icons.arrow_back,
            color: Colors.white,
          ),
          onPressed: onBackPressed,
        ),

        // 标题
        Expanded(
          child: title == null || title!.isEmpty
              ? const SizedBox.shrink()
              : Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 8),
                  child: Text(
                    title!,
                    textAlign: TextAlign.left,
                    maxLines: 1,
                    overflow: TextOverflow.ellipsis,
                    style: const TextStyle(
                      fontSize: 16,
                      color: Colors.white,
                    ),
                  ),
                ),
        ),

        // 下载按钮，可选
        if (isDownload != null && onDownloadPressed != null) ...[
          const SizedBox(width: 4),
          IconButton(
            icon: Icon(
              isDownload!
                  ? Icons.download_done_rounded
                  : Icons.download_rounded,
              color: Colors.white,
            ),
            onPressed: () => onDownloadPressed?.call(isDownload!),
          ),
        ],

        // 截图按钮，可选
        if (onSnapshotPressed != null) ...[
          const SizedBox(width: 4),
          IconButton(
            icon: const Icon(
              Icons.camera_alt_rounded,
              color: Colors.white,
            ),
            onPressed: onSnapshotPressed,
          )
        ],

        // PIP 按钮，可选
        if (onPIPPressed != null) ...[
          const SizedBox(width: 4),
          IconButton(
            icon: const Icon(
              Icons.picture_in_picture_alt_rounded,
              color: Colors.white,
            ),
            onPressed: onPIPPressed,
          )
        ],

        // 设置按钮，仅当 onSettingsPressed 不为空时显示
        if (onSettingsPressed != null) ...[
          const SizedBox(width: 4),
          IconButton(
            icon: const Icon(
              Icons.settings,
              color: Colors.white,
            ),
            onPressed: onSettingsPressed,
          ),
        ],
      ],
    ),
  );
}