private void _InitializeWindowCornerRadius()
{
// The radius of window corners isn't exposed as a true system parameter.
// It instead is a logical size that we're approximating based on the current theme.
// There aren't any known variations based on theme color.
Assert.IsNeitherNullNorEmpty(UxThemeName);
// These radii are approximate. The way WPF does rounding is different than how
// rounded-rectangle HRGNs are created, which is also different than the actual
// round corners on themed Windows. For now we're not exposing anything to
// mitigate the differences.
var cornerRadius = default(CornerRadius);
// This list is known to be incomplete and very much not future-proof.
// On XP there are at least a couple of shipped themes that this won't catch,
// "Zune" and "Royale", but WPF doesn't know about these either.
// If a new theme was to replace Aero, then this will fall back on "classic" behaviors.
// This isn't ideal, but it's not the end of the world. WPF will generally have problems anyways.
switch (UxThemeName.ToUpperInvariant())
{
case "LUNA":
cornerRadius = new CornerRadius(6, 6, 0, 0);
break;
case "AERO":
// Aero has two cases. One with glass and one without...
if (NativeMethodsShell.DwmIsCompositionEnabled())
{
cornerRadius = new CornerRadius(8);
}
else
{
cornerRadius = new CornerRadius(6, 6, 0, 0);
}
break;
case "CLASSIC":
case "ZUNE":
case "ROYALE":
default:
cornerRadius = new CornerRadius(0);
break;
}
WindowCornerRadius = cornerRadius;
}
// Most properties exposed here have a way of being queried directly
// and a way of being notified of updates via a window message.
// This region is a grouping of both, for each of the exposed properties.
private void _InitializeIsGlassEnabled()
{
IsGlassEnabled = NativeMethodsShell.DwmIsCompositionEnabled();
}