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我正在尝试制作一个可以下载多个文件并在 qtreeview 中显示它们的下载管理器。成功下载后，qtreeview 中的每个项目都应显示“已完成”的文件名、进度条和状态文本。
将这些添加到 qtreeview 所需的最简单和最小的代码量是多少？