protected override void OnAttached()
{
try {
var control = Control as Android.Widget.TextView;
float radius = (float)ShadowEffect.GetRadius(Element);
float distanceX = (float)ShadowEffect.GetDistanceX(Element);
float distanceY = (float)ShadowEffect.GetDistanceY(Element);
Android.Graphics.Color color = ShadowEffect.GetColor(Element).ToAndroid();
control.SetShadowLayer(radius, distanceX, distanceY, color);
} catch (Exception ex) {
Console.WriteLine("Cannot set property on attached control. Error: ", ex.Message);
}
}
void Update()
{
if (View == null || Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
return;
}
var radius = (float)ShadowEffect.GetRadius(Element);
if (radius < 0)
{
radius = defaultRadius;
}
var opacity = ShadowEffect.GetOpacity(Element);
if (opacity < 0)
{
opacity = defaultOpacity;
}
var androidColor = ShadowEffect.GetColor(Element).MultiplyAlpha(opacity).ToAndroid();
if (View is TextView textView)
{
var offsetX = (float)ShadowEffect.GetOffsetX(Element);
var offsetY = (float)ShadowEffect.GetOffsetY(Element);
textView.SetShadowLayer(radius, offsetX, offsetY, androidColor);
return;
}
View.OutlineProvider = (Element as VisualElement)?.BackgroundColor.A > 0
? ViewOutlineProvider.PaddedBounds
: ViewOutlineProvider.Bounds;
View.Elevation = View.Context.ToPixels(radius);
if (Build.VERSION.SdkInt < BuildVersionCodes.P)
{
return;
}
View.SetOutlineAmbientShadowColor(androidColor);
View.SetOutlineSpotShadowColor(androidColor);
}
void UpdateShadow()
{
if (shadow == null)
{
return;
}
var radius = (float)ShadowEffect.GetRadius(Element);
var opacity = (float)ShadowEffect.GetOpacity(Element);
var color = ShadowEffect.GetColor(Element).ToWindowsColor();
var offsetX = (float)ShadowEffect.GetOffsetX(Element);
var offsetY = (float)ShadowEffect.GetOffsetY(Element);
shadow.Color = color;
shadow.BlurRadius = radius < 0 ? defaultRadius : radius;
shadow.Opacity = opacity < 0 ? defaultOpacity : opacity;
shadow.Offset = new Vector3(offsetX, offsetY, 0);
UpdateShadowMask();
}
void UpdateRadius()
{
Control.Layer.CornerRadius = (nfloat)ShadowEffect.GetRadius(Element);
}
void Update()
{
if (View == null || Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
return;
}
var radius = (float)ShadowEffect.GetRadius(Element);
if (radius < 0)
{
radius = defaultRadius;
}
var opacity = ShadowEffect.GetOpacity(Element);
if (opacity < 0)
{
opacity = defaultOpacity;
}
var color = ShadowEffect.GetColor(Element);
if (!color.IsDefault)
{
color = color.MultiplyAlpha(opacity);
}
var androidColor = color.ToAndroid();
var offsetX = (float)ShadowEffect.GetOffsetX(Element);
var offsetY = (float)ShadowEffect.GetOffsetY(Element);
var cornerRadius = Element is IBorderElement borderElement ? borderElement.CornerRadius : 0;
if (View is AButton button)
{
button.StateListAnimator = null;
}
else if (View is not AButton && View is ATextView textView)
{
textView.SetShadowLayer(radius, offsetX, offsetY, androidColor);
return;
}
var pixelOffsetX = View.Context.ToPixels(offsetX);
var pixelOffsetY = View.Context.ToPixels(offsetY);
var pixelCornerRadius = View.Context.ToPixels(cornerRadius);
View.OutlineProvider = new ShadowOutlineProvider(pixelOffsetX, pixelOffsetY, pixelCornerRadius);
View.Elevation = View.Context.ToPixels(radius);
if (View.Parent is ViewGroup group)
{
group.SetClipToPadding(false);
}
#pragma warning disable
if (Build.VERSION.SdkInt < BuildVersionCodes.P)
{
return;
}
View.SetOutlineAmbientShadowColor(androidColor);
View.SetOutlineSpotShadowColor(androidColor);
#pragma warning restore
}
void UpdateRadius()
{
radius = (float)ShadowEffect.GetRadius(Element);
}
