自定义QComboBox，用Listwidget做Model，美化

[{"title":"（ 12 个子文件 10KB ） 自定义QComboBox，用Listwidget做Model，美化","children":[{"title":"myCombobox","children":[{"title":"myCombobox.pro <span style='color:#111;'> 456B </span>","children":null,"spread":false},{"title":"新建文本文档.txt <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"MyComboBox.cpp <span style='color:#111;'> 4.94KB </span>","children":null,"spread":false},{"title":"square_check.png <span style='color:#111;'> 1.00KB </span>","children":null,"spread":false},{"title":"MyComboBox.h <span style='color:#111;'> 1.43KB </span>","children":null,"spread":false},{"title":"img.qrc <span style='color:#111;'> 137B </span>","children":null,"spread":false},{"title":"myCombobox.pro.user <span style='color:#111;'> 42.59KB </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 186B </span>","children":null,"spread":false},{"title":"mainwindow.ui <span style='color:#111;'> 1.37KB </span>","children":null,"spread":false},{"title":"mainwindow.cpp <span style='color:#111;'> 693B </span>","children":null,"spread":false},{"title":"arrow_down.png <span style='color:#111;'> 1.22KB </span>","children":null,"spread":false},{"title":"mainwindow.h <span style='color:#111;'> 316B </span>","children":null,"spread":false}],"spread":false}],"spread":true}]