}
if (wheel) {
+ /* Very slightly modified from fg_main_mswin.
+ * Because we don't want MouseWheel to be called every. single. time.
+ * That the action occurs, we mimic the Windows version with "wheel deltas"
+ * XXX Do we even want this?
+ * XXX If we want this, it's possible to get horizontal scroll as well.
+ * XXX -Vertical scroll=wheel 0, horizontal=wheel 1? */
fgState.MouseWheelTicks -= wheel;
- //TODO: Implement wheel support (based on fg_main_mswin... though it seems excessive)
+ if (abs(fgState.MouseWheelTicks) >= WHEEL_DELTA)
+ {
+ int wheel_number = 0;
+ int direction = (fgState.MouseWheelTicks > 0) ? -1 : 1;
+
+ if (!FETCH_WCB(*window, MouseWheel) && !FETCH_WCB(*window, Mouse))
+ break;
+
+ //XXX fgSetWindow(window);
+
+ while(abs(fgState.MouseWheelTicks) >= WHEEL_DELTA)
+ {
+ if (FETCH_WCB(*window, MouseWheel))
+ INVOKE_WCB(*window, MouseWheel, (wheel_number, direction, window->State.MouseX, window->State.MouseY));
+ else /* No mouse wheel, call the mouse button callback twice */
+ {
+ /*
+ * Map wheel zero to button 3 and 4; +1 to 3, -1 to 4
+ * " " one +1 to 5, -1 to 6, ...
+ *
+ * XXX The below assumes that you have no more than 3 mouse
+ * XXX buttons. Sorry.
+ */
+ int button = wheel_number * 2 + 3;
+ if (direction < 0)
+ ++button;
+ INVOKE_WCB(*window, Mouse, (button, GLUT_DOWN, window->State.MouseX, window->State.MouseY));
+ INVOKE_WCB(*window, Mouse, (button, GLUT_UP, window->State.MouseX, window->State.MouseY));
+ }
+
+ fgState.MouseWheelTicks -= WHEEL_DELTA * direction;
+ }
+ }
}
fgState.Modifiers = INVALID_MODIFIERS;