public override void Draw(RectangleF rectB)
{
CGColorSpace cs = null;
CGContext ctx = null;
RectangleF bds;
using (ctx = UIGraphics.GetCurrentContext()) {
using (cs = CGColorSpace.CreateDeviceRGB()) {
if (Vertical)
{
ctx.TranslateCTM(0, Bounds.Height);
ctx.ScaleCTM(1, -1);
bds = Bounds;
}
else
{
ctx.TranslateCTM(0, Bounds.Height);
ctx.RotateCTM(-(float)Math.PI / 2);
bds = new RectangleF(0, 0, Bounds.Height, Bounds.Width);
}
ctx.SetFillColorSpace(cs);
ctx.SetStrokeColorSpace(cs);
if (NumLights == 0)
{
float currentTop = 0;
if (BgColor != null)
{
BgColor.SetColor();
ctx.FillRect(bds);
}
foreach (var thisTresh in ColorThresholds)
{
var val = Math.Min(thisTresh.MaxValue, Level);
var rect = new RectangleF(0, bds.Height * currentTop, bds.Width, bds.Height * (val - currentTop));
thisTresh.Color.SetColor();
ctx.FillRect(rect);
if (Level < thisTresh.MaxValue)
{
break;
}
currentTop = val;
}
if (BorderColor != null)
{
BorderColor.SetColor();
bds.Inflate(-0.5f, -0.5f);
ctx.StrokeRect(bds);
}
}
else
{
float lightMinVal = 0;
float insetAmount, lightVSpace;
int peakLight = -1;
lightVSpace = bds.Height / (float)NumLights;
if (lightVSpace < 4)
{
insetAmount = 0;
}
else if (lightVSpace < 8)
{
insetAmount = 0.5f;
}
else
{
insetAmount = 1;
}
if (PeakLevel > 0)
{
peakLight = (int)(PeakLevel * NumLights);
if (peakLight >= NumLights)
{
peakLight = NumLights - 1;
}
}
for (int light_i = 0; light_i < NumLights; light_i++)
{
float lightMaxVal = (light_i + 1) / (float)NumLights;
float lightIntensity;
RectangleF lightRect;
UIColor lightColor;
if (light_i == peakLight)
{
lightIntensity = 1;
}
else
{
lightIntensity = (Level - lightMinVal) / (lightMaxVal - lightMinVal);
lightIntensity = Clamp(0, lightIntensity, 1);
if (!VariableLightIntensity && lightIntensity > 0)
{
lightIntensity = 1;
}
}
lightColor = ColorThresholds [0].Color;
int color_i = 0;
for (; color_i < ColorThresholds.Length - 1; color_i++)
{
var thisTresh = ColorThresholds [color_i];
var nextTresh = ColorThresholds [color_i + 1];
if (thisTresh.MaxValue <= lightMaxVal)
{
//Console.WriteLine ("PICKED COLOR at {0}", color_i);
lightColor = nextTresh.Color;
}
}
lightRect = new RectangleF(0, bds.Height * light_i / (float)NumLights,
bds.Width, bds.Height * (1f / NumLights));
lightRect.Inset(insetAmount, insetAmount);
if (BgColor != null)
{
BgColor.SetColor();
ctx.FillRect(lightRect);
}
//Console.WriteLine ("Got: {0} {1}", lightColor, UIColor.Red);
//lightColor = UIColor.Red;
if (lightIntensity == 1)
{
lightColor.SetColor();
//Console.WriteLine ("Setting color to {0}", lightColor);
ctx.FillRect(lightRect);
}
else if (lightIntensity > 0)
{
using (var clr = new CGColor(lightColor.CGColor, lightIntensity)) {
ctx.SetFillColor(clr);
ctx.FillRect(lightRect);
}
}
if (BorderColor != null)
{
BorderColor.SetColor();
lightRect.Inset(0.5f, 0.5f);
ctx.StrokeRect(lightRect);
}
lightMinVal = lightMaxVal;
}
}
}
}
}