private static void initializeShadow(DependencyObject i, double?value, ShadowDirection direction, bool allowShadows)
{
var uiElement = i as UIElement;
if (uiElement != null && value.HasValue)
{
if (!allowShadows)
{
uiElement.Effect = null;
return;
}
if (value.Value >= 0)
{
if (value == 0)
{
uiElement.Effect = null;
}
else
{
var shadow = ShadowInterpolator.Interpolate(value.Value, direction);
uiElement.Effect = shadow;
}
}
}
}
public static DropShadowEffect Interpolate(double level, ShadowDirection direction)
{
var blur = calculateBlur(level);
var depth = calculateDepth(level);
return(new DropShadowEffect
{
BlurRadius = blur,
ShadowDepth = depth,
Direction = direction == ShadowDirection.Down ? 270 : 90,
Color = shadowColor,
Opacity = opacity
});
}
protected Cap(
CGImage icon,
Func <nfloat, nfloat> scale,
nfloat iconHeight,
nfloat iconWidth,
ShadowDirection shadowDirection)
{
this.shadowDirection = shadowDirection;
var center = new CGPoint(0, 0);
var outerPath = new UIBezierPath();
outerPath.AddArc(center, scale(outerRadius), 0, (nfloat)Math.FullCircle, false);
Path = outerPath.CGPath;
var innerPath = new UIBezierPath();
innerPath.AddArc(center, scale(innerRadius), 0, (nfloat)Math.FullCircle, false);
var circleLayer = new CAShapeLayer {
Path = innerPath.CGPath, FillColor = ColorAssets.Background.CGColor
};
var imageFrame = new CGRect(
x: center.X - scale(iconWidth) / 2f,
y: center.Y - scale(iconHeight) / 2f,
width: scale(iconWidth),
height: scale(iconHeight));
var maskLayer = new CALayer {
Contents = icon, Frame = new CGRect(0, 0, scale(iconWidth), scale(iconHeight))
};
imageLayer = new CALayer {
Mask = maskLayer, Frame = imageFrame
};
circleLayer.AddSublayer(imageLayer);
AddSublayer(circleLayer);
ShadowColor = ColorAssets.Separator.CGColor;
ShadowRadius = 0.0f;
ShadowPath = Path;
ShadowOpacity = 1.0f;
}
public static void SetDirection(DependencyObject i, ShadowDirection v) => i.Set(DirectionProperty, v);