XPLMAvionicsMouseWheel_f

XPLMAvionicsMouseWheel_f

typedef int (* XPLMAvionicsMouseWheel_f)(
                         int                  x,
                         int                  y,
                         int                  wheel,
                         int                  clicks,
                         void *               inRefcon);

Mouse wheel callback for scroll actions into your screen or (2D-popup) bezel, useful if your bezel has knobs that can be turned using the mouse wheel, or if you want to simulate pinch-to-zoom on a touchscreen. Return 1 to consume the event, or 0 to let X-Plane process it (for stock avionics devices). The number of “clicks” indicates how far the wheel was turned since the last callback. The wheel is 0 for the vertical axis or 1 for the horizontal axis (for OS/mouse combinations that support this).