public override bool DrawNeedleCover(Graphics Gr, RectangleF rc)
{
if (this.AnalogMeter == null)
{
return(false);
}
Color clr = this.AnalogMeter.NeedleColor;
RectangleF _rc = rc;
float drawRatio = this.AnalogMeter.GetDrawRatio();
Color clr1 = Color.FromArgb(70, clr);
_rc.Inflate(5 * drawRatio, 5 * drawRatio);
SolidBrush brTransp = new SolidBrush(clr1);
Gr.FillEllipse(brTransp, _rc);
clr1 = clr;
Color clr2 = LBColorManager.StepColor(clr, 75);
LinearGradientBrush br1 = new LinearGradientBrush(rc,
clr1,
clr2,
45);
Gr.FillEllipse(br1, rc);
return(true);
}
public override bool DrawBody(Graphics Gr, RectangleF rc)
{
if (this.AnalogMeter == null)
{
return(false);
}
Color bodyColor = this.AnalogMeter.BodyColor;
Color cDark = LBColorManager.StepColor(bodyColor, 20);
LinearGradientBrush br1 = new LinearGradientBrush(rc,
bodyColor,
cDark,
45);
Gr.FillEllipse(br1, rc);
float drawRatio = this.AnalogMeter.GetDrawRatio();
RectangleF _rc = rc;
_rc.X += 3 * drawRatio;
_rc.Y += 3 * drawRatio;
_rc.Width -= 6 * drawRatio;
_rc.Height -= 6 * drawRatio;
LinearGradientBrush br2 = new LinearGradientBrush(_rc,
cDark,
bodyColor,
45);
Gr.FillEllipse(br2, _rc);
return(true);
}
public static Color StepColor(Color clr, int alpha)
{
if (alpha == 100)
{
return(clr);
}
byte a = clr.A;
byte r = clr.R;
byte g = clr.G;
byte b = clr.B;
float bg = 0;
int _alpha = Math.Min(alpha, 200);
_alpha = Math.Max(alpha, 0);
double ialpha = ((double)(_alpha - 100.0)) / 100.0;
if (ialpha > 100)
{
// blend with white
bg = 255.0F;
ialpha = 1.0F - ialpha; // 0 = transparent fg; 1 = opaque fg
}
else
{
// blend with black
bg = 0.0F;
ialpha = 1.0F + ialpha; // 0 = transparent fg; 1 = opaque fg
}
r = (byte)(LBColorManager.BlendColour(r, bg, ialpha));
g = (byte)(LBColorManager.BlendColour(g, bg, ialpha));
b = (byte)(LBColorManager.BlendColour(b, bg, ialpha));
return(Color.FromArgb(a, r, g, b));
}