3rdparty/OpenCV-2.3.0/modules/highgui/src/window_QT.cpp
//Note: move 2 percent of the window
move 2 percent of the window
move 2 percent of the window
void  ViewPort::siftWindowOnDown()
{
	float delta = -2*height()/(100.0*param_matrixWorld.m11());
	moveView(QPointF(0,delta));
}
void ViewPort :: siftWindowOnDown ( ) { float delta = -2 * height ( ) / ( 100.0 * param_matrixWorld . m11 ( ) ) ; moveView ( QPointF ( 0 , delta ) ) ; }
Note: move 2 percent of the window
Note : move 2 percent of the window