public override void DrawRect(CGRect dirtyRect)
{
NSColorList colors = NSColorList.ColorListNamed("System");
CGRect rect = Bounds;
rect.Height = 12;
var style = (NSMutableParagraphStyle)NSParagraphStyle.DefaultParagraphStyle.MutableCopy();
style.Alignment = NSTextAlignment.Right;
var attrs = new NSStringAttributes {
Font = NSFont.SystemFontOfSize(8),
ForegroundColor = NSColor.LabelColor,
ParagraphStyle = style
};
foreach (NSString key in colors.AllKeys())
{
if (DrawColors)
{
NSColor color = colors.ColorWithKey(key);
color.Set();
NSGraphics.RectFill(rect);
}
if (DrawTitles)
{
key.DrawString(rect, attrs.Dictionary);
}
rect.Y += 12;
}
}
// Gets the string for the text field from the object passed in.
public override string StringFor(NSObject value)
{
// Not a color?
if (value.GetType() != typeof(NSColor))
{
return(null);
}
// Convert to an RGB color space
NSColor color = ((NSColor)value).UsingColorSpace(NSColorSpace.CalibratedRGB);
// Get components as floats between 0 and 1
nfloat red, green, blue, alpha;
color.GetRgba(out red, out green, out blue, out alpha);
// Initialize the distance to something large
double minDistance = 3.0f;
string closestKey = "";
// Find the closest color
foreach (string key in colorList.AllKeys())
{
NSColor c = colorList.ColorWithKey(key);
nfloat r, g, b, a;
c.GetRgba(out r, out g, out b, out a);
// How far apart are color and c?
double distance = (Math.Pow(red - r, 2) + Math.Pow(green - g, 2) + Math.Pow(blue - b, 2));
// Is this the closest yet?
if (distance < minDistance)
{
minDistance = distance;
closestKey = key;
}
}
return(closestKey);
}