rem: wheelUpdateBrightnessGradient(panel, panel->color);
context: wheelInit(W_ColorPanel *panel){    if (panel->color.set != cpHSV)	convertCPColor(&panel->color);    WMSetSliderValue(panel->wheelBrightnessS, 255 - panel->color.hsv.value);    wheelUpdateBrightnessGradient(panel, panel->color);        panel->colx = 2 + rint((colorWheelSize / 2.0) *	    (1 + ( panel->color.hsv.saturation/255.0) *	     cos( panel->color.hsv.hue * M_PI/180.0)));    panel->coly = 2 + rint((colorWheelSize / 2.0) *	    (1 + ( panel->color.hsv.saturation/255.0) *	     sin(- panel->color.hsv.hue*M_PI/180.0)));        wheelCalculateValues(panel, panel->color.hsv.value);}