mousePressEvent  2634 modules/highgui/src/window_QT.cpp     QWidget::mousePressEvent(evnt);
mousePressEvent  3174 modules/highgui/src/window_QT.cpp     QGLWidget::mousePressEvent(evnt);
mousePressEvent   441 modules/highgui/src/window_QT.h     void mousePressEvent(QMouseEvent* event);
mousePressEvent   514 modules/highgui/src/window_QT.h     void mousePressEvent(QMouseEvent* event);