private static IntPtr WmNcPaint(IntPtr hwnd, IntPtr wparam, ref bool handled)
{
var hrgnClip = wparam == new IntPtr(1) ? IntPtr.Zero : wparam;
var dcEx = NativeMethods.GetDCEx(hwnd, hrgnClip, 155);
if (dcEx != IntPtr.Zero)
{
try
{
var nonClientFillColor = Colors.Black;
var solidBrush =
NativeMethods.CreateSolidBrush(nonClientFillColor.B << 16 | nonClientFillColor.G << 8 |
nonClientFillColor.R);
try
{
var relativeToWindowRect = GetClientRectRelativeToWindowRect(hwnd);
relativeToWindowRect.Top = relativeToWindowRect.Bottom;
relativeToWindowRect.Bottom = relativeToWindowRect.Top + 1;
NativeMethods.FillRect(dcEx, ref relativeToWindowRect, solidBrush);
}
finally
{
NativeMethods.DeleteObject(solidBrush);
}
}
finally
{
NativeMethods.ReleaseDC(hwnd, dcEx);
}
}
handled = true;
return(IntPtr.Zero);
}
protected IntPtr ComputeCornerRadiusRectRegion(Int32Rect rect, CornerRadius cornerRadius)
{
if (cornerRadius.TopLeft == cornerRadius.TopRight && cornerRadius.TopLeft == cornerRadius.BottomLeft &&
cornerRadius.BottomLeft == cornerRadius.BottomRight)
{
return(ComputeRoundRectRegion(rect.X, rect.Y, rect.Width, rect.Height, (int)cornerRadius.TopLeft));
}
var num1 = IntPtr.Zero;
var num2 = IntPtr.Zero;
var num3 = IntPtr.Zero;
var num4 = IntPtr.Zero;
var num5 = IntPtr.Zero;
var num6 = IntPtr.Zero;
var num7 = IntPtr.Zero;
var num8 = IntPtr.Zero;
var num9 = IntPtr.Zero;
var num10 = IntPtr.Zero;
try
{
num1 = ComputeRoundRectRegion(rect.X, rect.Y, rect.Width, rect.Height, (int)cornerRadius.TopLeft);
num2 = ComputeRoundRectRegion(rect.X, rect.Y, rect.Width, rect.Height, (int)cornerRadius.TopRight);
num3 = ComputeRoundRectRegion(rect.X, rect.Y, rect.Width, rect.Height,
(int)cornerRadius.BottomLeft);
num4 = ComputeRoundRectRegion(rect.X, rect.Y, rect.Width, rect.Height,
(int)cornerRadius.BottomRight);
var point = new Core.Platform.Point
{
X = rect.X + rect.Width / 2,
Y = rect.Y + rect.Height / 2
};
num5 = NativeMethods.CreateRectRgn(rect.X, rect.Y, point.X + 1, point.Y + 1);
num6 = NativeMethods.CreateRectRgn(point.X - 1, rect.Y, rect.X + rect.Width, point.Y + 1);
num7 = NativeMethods.CreateRectRgn(rect.X, point.Y - 1, point.X + 1, rect.Y + rect.Height);
num8 = NativeMethods.CreateRectRgn(point.X - 1, point.Y - 1, rect.X + rect.Width, rect.Y + rect.Height);
num9 = NativeMethods.CreateRectRgn(0, 0, 1, 1);
num10 = NativeMethods.CreateRectRgn(0, 0, 1, 1);
NativeMethods.CombineRgn(num10, num1, num5, NativeMethods.CombineMode.RgnAnd);
NativeMethods.CombineRgn(num9, num2, num6, NativeMethods.CombineMode.RgnAnd);
NativeMethods.CombineRgn(num10, num10, num9, NativeMethods.CombineMode.RgnOr);
NativeMethods.CombineRgn(num9, num3, num7, NativeMethods.CombineMode.RgnAnd);
NativeMethods.CombineRgn(num10, num10, num9, NativeMethods.CombineMode.RgnOr);
NativeMethods.CombineRgn(num9, num4, num8, NativeMethods.CombineMode.RgnAnd);
NativeMethods.CombineRgn(num10, num10, num9, NativeMethods.CombineMode.RgnOr);
}
finally
{
if (num1 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num1);
}
if (num2 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num2);
}
if (num3 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num3);
}
if (num4 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num4);
}
if (num5 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num5);
}
if (num6 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num6);
}
if (num7 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num7);
}
if (num8 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num8);
}
if (num9 != IntPtr.Zero)
{
NativeMethods.DeleteObject(num9);
}
}
return(num10);
}