• David Gobbi's avatar
    BUG: Fix track-pad scrolling action for OS X Cocoa. · d4f3b840
    David Gobbi authored
    The Apple track pad generates scrollWheel events for a two-fingered drag.
    However, the track pad generates many more of these events than a real
    scroll wheel, but for most events the "delta" is zero and only every or
    so event has a non-zero delta, this emulates the "click click click"
    scrolling of a typical scroll wheel.  VTK was treating the zero delta
    values as negative deltas, instead of ignoring them.
    Change-Id: I4030ad9fbbf675d5298c3cf4322e489a127e5e26