Qt绘制环形进度条（paintEvent）

[{"title":"（ 8 个子文件 7KB ） Qt绘制环形进度条（paintEvent）","children":[{"title":"RingProgressBar","children":[{"title":"widget.ui <span style='color:#111;'> 4.24KB </span>","children":null,"spread":false},{"title":"widget.cpp <span style='color:#111;'> 5.21KB </span>","children":null,"spread":false},{"title":"ringprogressbar.cpp <span style='color:#111;'> 1.91KB </span>","children":null,"spread":false},{"title":"RingProgressBar.pro <span style='color:#111;'> 428B </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 175B </span>","children":null,"spread":false},{"title":"ringprogressbar.h <span style='color:#111;'> 786B </span>","children":null,"spread":false},{"title":"RingProgressBar.pro.user <span style='color:#111;'> 18.09KB </span>","children":null,"spread":false},{"title":"widget.h <span style='color:#111;'> 539B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]