QStandardItemModel分页滚动显示内容

[{"title":"（ 23 个子文件 1.51MB ） QStandardItemModel分页滚动显示内容","children":[{"title":"Try","children":[{"title":"build-try001-Desktop_Qt_5_12_0_MinGW_64_bit-Debug","children":[{"title":"Makefile.Debug <span style='color:#111;'> 68.59KB </span>","children":null,"spread":false},{"title":".qmake.stash <span style='color:#111;'> 1.07KB </span>","children":null,"spread":false},{"title":"Makefile.Release <span style='color:#111;'> 68.70KB </span>","children":null,"spread":false},{"title":"ui_mainwindow.h <span style='color:#111;'> 2.07KB </span>","children":null,"spread":false},{"title":"debug","children":[{"title":"moc_mainwindow.cpp <span style='color:#111;'> 4.02KB </span>","children":null,"spread":false},{"title":"moc_mainwindow.o <span style='color:#111;'> 550.09KB </span>","children":null,"spread":false},{"title":"moc_requestthread.cpp <span style='color:#111;'> 3.46KB </span>","children":null,"spread":false},{"title":"moc_predefs.h <span style='color:#111;'> 14.28KB </span>","children":null,"spread":false},{"title":"mainwindow.o <span style='color:#111;'> 723.93KB </span>","children":null,"spread":false},{"title":"try001.exe <span style='color:#111;'> 2.61MB </span>","children":null,"spread":false},{"title":"main.o <span style='color:#111;'> 606.17KB </span>","children":null,"spread":false},{"title":"requestthread.o <span style='color:#111;'> 372.52KB </span>","children":null,"spread":false},{"title":"moc_requestthread.o <span style='color:#111;'> 395.99KB </span>","children":null,"spread":false}],"spread":true},{"title":"Makefile <span style='color:#111;'> 31.07KB </span>","children":null,"spread":false},{"title":"release","children":null,"spread":false}],"spread":true},{"title":"try001","children":[{"title":"requestthread.h <span style='color:#111;'> 1.48KB </span>","children":null,"spread":false},{"title":"requestthread.cpp <span style='color:#111;'> 7.67KB </span>","children":null,"spread":false},{"title":"try001.pro.user <span style='color:#111;'> 23.71KB </span>","children":null,"spread":false},{"title":"try001.pro <span style='color:#111;'> 1.41KB </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 183B </span>","children":null,"spread":false},{"title":"mainwindow.ui <span style='color:#111;'> 654B </span>","children":null,"spread":false},{"title":"mainwindow.cpp <span style='color:#111;'> 7.13KB </span>","children":null,"spread":false},{"title":"communprotocol.h <span style='color:#111;'> 6.19KB </span>","children":null,"spread":false},{"title":"mainwindow.h <span style='color:#111;'> 922B </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}]