Brightness slider works with mouse wheel.

power_console_common.h

@@ -1,5 +1,49 @@
 #pragma once
 
+#include <Fl/Fl.H>
+#include <Fl/Fl_Window.H>
+#include <Fl/Fl_Value_Slider.H>
+
+
 void saverChosen();
 void perfChosen();
 void balChosen();
+
+class MouseWheelSlider : public Fl_Value_Slider
+{
+	public:
+		explicit
+		MouseWheelSlider( const int x, const int y, const int w, const int h,
+				const char *const l= 0 )
+			: Fl_Value_Slider( x, y, w, h, l )
+		{
+
+			step( 1 );
+		}
+
+		int
+		handle( const int event ) override
+		{
+			switch( event )
+			{
+				case FL_MOUSEWHEEL:
+				{
+					// Negative, because I use this for the Brightness control.
+					const int dy= -Fl::event_dy();
+
+					value( value() - dy * step() );
+
+					do_callback();
+
+					return 1;
+				}
+				break;
+
+				default:
+				{
+					return this->Fl_Value_Slider::handle( event );
+				}
+				break;
+			}
+		}
+};