LWJGL 2 Mouse doesnt give out dx/dy when grabbed

Question

I currently am making a game with a FPS type interface. Mouse.setGrabbed(true) and i'm trying to use that but now Mouse.getDX() and Mouse.getDY() does not work anymore and return 0. How can I get the values while the mouse is grabbed?

Answer 1

According to the LWJGL 2 documentation, when grab is true, getX() and getY() will return the delta coordinate values for the mouse.

Source: http://legacy.lwjgl.org/javadoc/org/lwjgl/input/Mouse.html#setGrabbed(boolean)