Render QGraphicsItem on QPixmap: aggregate 'QWidget w' has incomplete type and cannot be defined
#include <QWidget>
and #include <QStyleOptionGraphicsItem>
should fix the compile error you are getting.
常见错误: 头文件未包含
#include <QWidget>
and #include <QStyleOptionGraphicsItem>
should fix the compile error you are getting.
常见错误: 头文件未包含