add new utility class QueryObject for measuring number of rendered samples

8 jobs for QueryObject
Status Job ID Name Coverage
  Test
passed #814
Linux
clang-c++11-Qt4

00:34:35

passed #818
Linux
clang-c++11-Qt5

00:47:49

passed #816
Linux
clang-c++98-Qt4

00:28:01

passed #820
Linux
clang-c++98-Qt5

00:36:23

passed #813
Linux
gcc-c++11-Qt4

00:53:02

passed #817
Linux
gcc-c++11-Qt5

00:55:13

passed #815
Linux
gcc-c++98-Qt4

00:37:08

passed #819
Linux
gcc-c++98-Qt5

00:42:16