public static Pen FromSystemColor(Color c)
{
if (!ColorUtil.IsSystemColor(c))
{
throw new ArgumentException(SR.Format(SR.ColorNotSystemColor, c.ToString()));
}
Pen[] systemPens = (Pen[])SafeNativeMethods.Gdip.ThreadData[s_systemPensKey];
if (systemPens == null)
{
systemPens = new Pen[(int)KnownColor.WindowText + (int)KnownColor.MenuHighlight - (int)KnownColor.YellowGreen];
SafeNativeMethods.Gdip.ThreadData[s_systemPensKey] = systemPens;
}
int idx = (int)c.ToKnownColor();
if (idx > (int)KnownColor.YellowGreen)
{
idx -= (int)KnownColor.YellowGreen - (int)KnownColor.WindowText;
}
idx--;
Debug.Assert(idx >= 0 && idx < systemPens.Length, "System colors have been added but our system color array has not been expanded.");
if (systemPens[idx] == null)
{
systemPens[idx] = new Pen(c, true);
}
return(systemPens[idx]);
}
public static Pen FromSystemColor(Color c)
{
if (ColorUtil.IsSystemColor(c))
{
Pen newPen = new Pen(c);
newPen.isModifiable = false;
return(newPen);
}
String message = String.Format("The color {0} is not a system color.", c);
throw new ArgumentException(message);
}
public static Color ArgbToKnownColor(int targetARGB)
{
EnsureColorTable();
for (int index = 0; index < s_colorTable.Length; ++index)
{
int argb = s_colorTable[index];
if (argb == targetARGB)
{
Color color = ColorUtil.FromKnownColor((KnownColor)index);
if (!ColorUtil.IsSystemColor(color))
{
return(color);
}
}
}
return(Color.FromArgb(targetARGB));
}
public SolidBrush(Color color)
{
_color = color;
IntPtr nativeBrush = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateSolidFill(_color.ToArgb(), out nativeBrush);
SafeNativeMethods.Gdip.CheckStatus(status);
SetNativeBrushInternal(nativeBrush);
#if FEATURE_SYSTEM_EVENTS
if (ColorUtil.IsSystemColor(_color))
{
SystemColorTracker.Add(this);
}
#endif
}
/// <summary>
/// Translates the specified <see cref='Color'/> to an Html string color representation.
/// </summary>
public static string ToHtml(Color c)
{
string colorString = string.Empty;
if (c.IsEmpty)
{
return(colorString);
}
if (ColorUtil.IsSystemColor(c))
{
switch (c.ToKnownColor())
{
case KnownColor.ActiveBorder:
colorString = "activeborder";
break;
case KnownColor.GradientActiveCaption:
case KnownColor.ActiveCaption:
colorString = "activecaption";
break;
case KnownColor.AppWorkspace:
colorString = "appworkspace";
break;
case KnownColor.Desktop:
colorString = "background";
break;
case KnownColor.Control:
colorString = "buttonface";
break;
case KnownColor.ControlLight:
colorString = "buttonface";
break;
case KnownColor.ControlDark:
colorString = "buttonshadow";
break;
case KnownColor.ControlText:
colorString = "buttontext";
break;
case KnownColor.ActiveCaptionText:
colorString = "captiontext";
break;
case KnownColor.GrayText:
colorString = "graytext";
break;
case KnownColor.HotTrack:
case KnownColor.Highlight:
colorString = "highlight";
break;
case KnownColor.MenuHighlight:
case KnownColor.HighlightText:
colorString = "highlighttext";
break;
case KnownColor.InactiveBorder:
colorString = "inactiveborder";
break;
case KnownColor.GradientInactiveCaption:
case KnownColor.InactiveCaption:
colorString = "inactivecaption";
break;
case KnownColor.InactiveCaptionText:
colorString = "inactivecaptiontext";
break;
case KnownColor.Info:
colorString = "infobackground";
break;
case KnownColor.InfoText:
colorString = "infotext";
break;
case KnownColor.MenuBar:
case KnownColor.Menu:
colorString = "menu";
break;
case KnownColor.MenuText:
colorString = "menutext";
break;
case KnownColor.ScrollBar:
colorString = "scrollbar";
break;
case KnownColor.ControlDarkDark:
colorString = "threeddarkshadow";
break;
case KnownColor.ControlLightLight:
colorString = "buttonhighlight";
break;
case KnownColor.Window:
colorString = "window";
break;
case KnownColor.WindowFrame:
colorString = "windowframe";
break;
case KnownColor.WindowText:
colorString = "windowtext";
break;
}
}
else if (c.IsNamedColor)
{
if (c == Color.LightGray)
{
// special case due to mismatch between Html and enum spelling
colorString = "LightGrey";
}
else
{
colorString = c.Name;
}
}
else
{
colorString = "#" + c.R.ToString("X2", null) +
c.G.ToString("X2", null) +
c.B.ToString("X2", null);
}
return(colorString);
}
public static string ToHtml(Color c)
{
if (c.IsEmpty)
{
return(String.Empty);
}
if (ColorUtil.IsSystemColor(c))
{
KnownColor kc = c.ToKnownColor();
switch (kc)
{
case KnownColor.ActiveBorder:
case KnownColor.ActiveCaption:
case KnownColor.AppWorkspace:
case KnownColor.GrayText:
case KnownColor.Highlight:
case KnownColor.HighlightText:
case KnownColor.InactiveBorder:
case KnownColor.InactiveCaption:
case KnownColor.InactiveCaptionText:
case KnownColor.InfoText:
case KnownColor.Menu:
case KnownColor.MenuText:
case KnownColor.ScrollBar:
case KnownColor.Window:
case KnownColor.WindowFrame:
case KnownColor.WindowText:
return(KnownColors.GetName(kc).ToLowerInvariant());
case KnownColor.ActiveCaptionText:
return("captiontext");
case KnownColor.Control:
return("buttonface");
case KnownColor.ControlDark:
return("buttonshadow");
case KnownColor.ControlDarkDark:
return("threeddarkshadow");
case KnownColor.ControlLight:
return("buttonface");
case KnownColor.ControlLightLight:
return("buttonhighlight");
case KnownColor.ControlText:
return("buttontext");
case KnownColor.Desktop:
return("background");
case KnownColor.HotTrack:
return("highlight");
case KnownColor.Info:
return("infobackground");
default:
return(String.Empty);
}
}
if (c.IsNamedColor)
{
if (c == Color.LightGray)
{
return("LightGrey");
}
else
{
return(c.Name);
}
}
return(FormatHtml(c.R, c.G, c.B));
}
