QTreeWidget的勾选，未勾选，半勾选（重新上传）

[{"title":"（6个子文件4KB）QTreeWidget的勾选，未勾选，半勾选（重新上传）","children":[{"title":"CheckedTree","children":[{"title":"CheckedTree","children":[{"title":"untitled.pro.user <span style='color:#111;'>23.20KB</span>","children":null,"spread":false},{"title":"widget.h <span style='color:#111;'>625B</span>","children":null,"spread":false},{"title":"widget.ui <span style='color:#111;'>769B</span>","children":null,"spread":false},{"title":"untitled.pro <span style='color:#111;'>1015B</span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'>175B</span>","children":null,"spread":false},{"title":"widget.cpp <span style='color:#111;'>3.17KB</span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}]