Web Color List in C# application
Hallo everbody,
if for example I set the BackColor of a Panel in Winform using Visual Studio, I can pick up the color from 3 lists:
Custom, Web, System
Is it possible to retreive only the Web colors in my C# code application? They are part of KnownColor but so far I could only find how to eliminate System Control from my list.
I would like to use the web colors because they are sorted in a nice way and I would like to i开发者_如何学运维nsert them into a self-implemented combobox.
Thank you
Color
struct contains all the web colors as constants (system colors are defined as constants in SystemColors
class)
To get a list of these colors just do:
var webColors = GetConstants(typeof(Color));
var sysColors = GetConstants(typeof(SystemColors));
having GetConstants
defined as follow:
static List<Color> GetConstants(Type enumType)
{
MethodAttributes attributes = MethodAttributes.Static | MethodAttributes.Public;
PropertyInfo[] properties = enumType.GetProperties();
List<Color> list = new List<Color>();
for (int i = 0; i < properties.Length; i++)
{
PropertyInfo info = properties[i];
if (info.PropertyType == typeof(Color))
{
MethodInfo getMethod = info.GetGetMethod();
if ((getMethod != null) && ((getMethod.Attributes & attributes) == attributes))
{
object[] index = null;
list.Add((Color)info.GetValue(null, index));
}
}
}
return list;
}
EDIT:
To get colors sorted exactly like in VS do:
var webColors = GetConstants(typeof(Color));
var sysColors = GetConstants(typeof(SystemColors));
webColors.Sort(new StandardColorComparer());
sysColors.Sort(new SystemColorComparer());
with StandardColorComparer
and SystemColorComparer
defined as follows:
class StandardColorComparer : IComparer<Color>
{
// Methods
public int Compare(Color color, Color color2)
{
if (color.A < color2.A)
{
return -1;
}
if (color.A > color2.A)
{
return 1;
}
if (color.GetHue() < color2.GetHue())
{
return -1;
}
if (color.GetHue() > color2.GetHue())
{
return 1;
}
if (color.GetSaturation() < color2.GetSaturation())
{
return -1;
}
if (color.GetSaturation() > color2.GetSaturation())
{
return 1;
}
if (color.GetBrightness() < color2.GetBrightness())
{
return -1;
}
if (color.GetBrightness() > color2.GetBrightness())
{
return 1;
}
return 0;
}
}
class SystemColorComparer : IComparer<Color>
{
// Methods
public int Compare(Color color, Color color2)
{
return string.Compare(color.Name, color2.Name, false, CultureInfo.InvariantCulture);
}
}
N.B. :
This code has been taken from System.Drawing.Design.ColorEditor
through reflector.
var webColors =
Enum.GetValues(typeof(KnownColor))
.Cast<KnownColor>()
.Where (k => k >= KnownColor.Transparent && k < KnownColor.ButtonFace) //Exclude system colors
.Select(k => Color.FromKnownColor(k));
EDIT:
To order the colors append:
.OrderBy(c => c.GetHue())
.ThenBy(c => c.GetSaturation())
.ThenBy(c => c.GetBrightness());
If you need it sorted by its primary color you could use this as starting point:
var colors = Enum.GetValues(typeof(KnownColor))
.Cast<KnownColor>()
.Select(kc => Color.FromKnownColor(kc))
.OrderBy(c => c.GetHue())
精彩评论