CAShapeLayer GetMaskShape (ViewMaskerType maskType, Xamarin.Forms.Size size)
{
var layer = new CAShapeLayer ();
layer.FillColor = UIColor.White.CGColor;
layer.StrokeColor = UIColor.White.CGColor;
layer.LineWidth = 0;
UIBezierPath path = null;
var bounds = new CGRect (0, 0, size.Width, size.Height);
switch (maskType) {
case ViewMaskerType.Circle:
path = UIBezierPath.FromRoundedRect (bounds, (nfloat)Math.Max (size.Width, size.Height));
break;
case ViewMaskerType.Triangle:
var point1 = new CGPoint (0, size.Height);
var point2 = new CGPoint (size.Width, size.Height);
var point3 = new CGPoint (size.Width / 2, 0);
path = new UIBezierPath ();
path.MoveTo (point1);
path.AddLineTo (point2);
path.AddLineTo (point3);
path.AddLineTo (point1);
path.ClosePath ();
path.Fill ();
break;
case ViewMaskerType.Square:
var smallRectangle = UIBezierPath.FromRect (bounds.Inset (50, 50));
path = UIBezierPath.FromRoundedRect (bounds, 20);
break;
default:
throw new ArgumentOutOfRangeException ();
}
layer.Path = path.CGPath;
return layer;
}
public void ApplyMaskToView (Xamarin.Forms.View view, ViewMaskerType maskType)
{
var renderer = view.GetRenderer ();
var nativeView = renderer.NativeView;
if (maskType == ViewMaskerType.None) {
view.SizeChanged -= OnSizeChanged;
nativeView.Layer.Mask = null;
} else {
var maskLayer = GetMaskShape (maskType, new Xamarin.Forms.Size (view.Width, view.Height));
maskLayer.Frame = nativeView.Bounds;
nativeView.Layer.Mask = maskLayer;
view.SizeChanged += OnSizeChanged;
}
nativeView.Tag = (int)maskType;
}
public void ApplyMaskToView(Xamarin.Forms.View view, ViewMaskerType maskType)
{
var renderer = view.GetRenderer();
var nativeView = renderer.NativeView;
if (maskType == ViewMaskerType.None)
{
view.SizeChanged -= OnSizeChanged;
nativeView.Layer.Mask = null;
}
else
{
var maskLayer = GetMaskShape(maskType, new Xamarin.Forms.Size(view.Width, view.Height));
maskLayer.Frame = nativeView.Bounds;
nativeView.Layer.Mask = maskLayer;
view.SizeChanged += OnSizeChanged;
}
nativeView.Tag = (int)maskType;
}
CAShapeLayer GetMaskShape(ViewMaskerType maskType, Xamarin.Forms.Size size)
{
var layer = new CAShapeLayer();
layer.FillColor = UIColor.White.CGColor;
layer.StrokeColor = UIColor.White.CGColor;
layer.LineWidth = 0;
UIBezierPath path = null;
var bounds = new CGRect(0, 0, size.Width, size.Height);
switch (maskType)
{
case ViewMaskerType.Circle:
path = UIBezierPath.FromRoundedRect(bounds, (nfloat)Math.Max(size.Width, size.Height));
break;
case ViewMaskerType.Triangle:
var point1 = new CGPoint(0, size.Height);
var point2 = new CGPoint(size.Width, size.Height);
var point3 = new CGPoint(size.Width / 2, 0);
path = new UIBezierPath();
path.MoveTo(point1);
path.AddLineTo(point2);
path.AddLineTo(point3);
path.AddLineTo(point1);
path.ClosePath();
path.Fill();
break;
case ViewMaskerType.Square:
var smallRectangle = UIBezierPath.FromRect(bounds.Inset(50, 50));
path = UIBezierPath.FromRoundedRect(bounds, 20);
break;
default:
throw new ArgumentOutOfRangeException();
}
layer.Path = path.CGPath;
return(layer);
}
public static void ApplyMask (this Xamarin.Forms.View view, ViewMaskerType maskType)
{
ViewExtensionProvider.ApplyMaskToView (view, maskType);
}
public void ApplyMaskToView (Xamarin.Forms.View view, ViewMaskerType maskType)
{
//we need to wrap the view inside another view
}
public void ApplyMaskToView(Xamarin.Forms.View view, ViewMaskerType maskType)
{
//we need to wrap the view inside another view
}
public static void ApplyMask(this Xamarin.Forms.View view, ViewMaskerType maskType)
{
ViewExtensionProvider.ApplyMaskToView(view, maskType);
}
