Improved the way sliders react to vertical/horizontal mouse-wheel moves.

modules/juce_gui_basics/widgets/juce_Slider.cpp

@@ -1006,9 +1006,9 @@ public:
                         valueBox->hideEditor (false);
 
                     const double value = (double) currentValue.getValue();
-                    const double delta = getMouseWheelDelta (value, (wheel.deltaX != 0 ? -wheel.deltaX : wheel.deltaY)
-                                                                        * (wheel.isReversed ? -1.0f : 1.0f));
-
+                    const double delta = getMouseWheelDelta (value, (std::abs (wheel.deltaX) > std::abs (wheel.deltaY)
+                                                                        ? -wheel.deltaX : wheel.deltaY)
+                                                                      * (wheel.isReversed ? -1.0f : 1.0f));
                     if (delta != 0)
                     {
                         const double newValue = value + jmax (interval, std::abs (delta)) * (delta < 0 ? -1.0 : 1.0);