Encapsulates the direction and velocity of mouse wheel events. Not all
combinations of browser and user input devices can generate all combinations
of direction or range of velocity information.
See Also:com.google.gwt.user.client.DOM.eventGetMouseWheelVelocityY See Also: An See Also: explanation of the units used for mouse wheel velocity.
the change in the mouse wheel position along the Y-axis; positiveif the mouse wheel is moving north (toward the top of the screen)or negative if the mouse wheel is moving south (toward the bottomof the screen)
Convenience method that returns true if
MouseWheelVelocity.getDeltaY() is a negative value.
true if the velocity includes a component directedtoword the top of the screen
Convenience method that returns true if
MouseWheelVelocity.getDeltaY() is a positive value.
true if the velocity includes a component directedtoword the bottom of the screen