i'm using point cloud library 1.6 pre built 32 bit for VS2010 on windows machine, and Qt version 5.2.
When try to include in my project, i have an issue:
Cannot open include file: 'QtGui/QWidget': No such file or directory
I know it is a long time now but I had the same error on Qt 5.13.
I solved my problems by adding widgets
in the pro file :
QT += widgets gui core
and by replaging the include files:
replace
#include <QtGui/QWidget>
with
#include <QWidget>
and eventually
#include <QtGui/QApplication>
with
#include <QApplication>
And it compiles succesfully