private UIImage GetGradientImage(nfloat width, CGSize size, CGColor[] colors)
{
var gradientLayer = new CAGradientLayer();
gradientLayer.Frame = new CGRect(0, 0, width, size.Height);
gradientLayer.CornerRadius = gradientLayer.Frame.Height / 2;
gradientLayer.MasksToBounds = true;
gradientLayer.Colors = colors;
gradientLayer.StartPoint = new CGPoint(x: 0.0, y: 0.5);
gradientLayer.EndPoint = new CGPoint(x: 1.0, y: 0.5);
if (control.HasSegment)
{
var segmentDelay = (size.Width - 10) / (Element.Maximum / control.Interval);
for (int i = 0; i <= Element.Maximum / control.Interval; i++)
{
var segmentLayer = new CALayer();
var myImage = i * control.Interval < Control.Value ? new UIImage(control.MaxIntervaImageSource) : new UIImage(control.MinIntervaImageSource);
segmentLayer.Contents = myImage.CGImage;
segmentLayer.Frame = new CGRect(i == 0 ? 10 : segmentDelay * i, (size.Height - 5) / 2, 5, 5);
gradientLayer.AddSublayer(segmentLayer);
}
}
UIGraphics.BeginImageContextWithOptions(size, gradientLayer.Opaque, 0.0f);
var context = UIGraphics.GetCurrentContext();
gradientLayer.RenderInContext(context);
var image = UIGraphics.GetImageFromCurrentImageContext().CreateResizableImage(new UIEdgeInsets(top: 0, left: size.Height, bottom: 0, right: size.Height));
UIGraphics.EndImageContext();
return(image);
}
protected override void OnElementChanged(VisualElementChangedEventArgs e)
{
base.OnElementChanged(e);
if (null != this.Element)
{
var page = e.NewElement as GradientContentPage;
var gradientLayer = new CAGradientLayer();
gradientLayer.Frame = View.Bounds;
gradientLayer.StartPoint = new CGPoint(0, 0.5);
gradientLayer.EndPoint = new CGPoint(1.0, 0.5);
gradientLayer.Colors = new CGColor[] { page.StartColor.ToCGColor(), page.EndColor.ToCGColor() };
var textureColor = UIColor.FromPatternImage(UIImage.FromFile("bg-pattern.png"));
var back = new CALayer {
Frame = View.Bounds
};
back.BackgroundColor = textureColor.CGColor;
gradientLayer.AddSublayer(back);
View.Layer.InsertSublayer(gradientLayer, 0);
}
}
public static CAGradientLayer StoresGrayGradient(RectangleF frame)
{
CAGradientLayer backgroundLayer = new CAGradientLayer();
backgroundLayer.Frame = new RectangleF(0, 0, frame.Width, frame.Height);
backgroundLayer.Colors = new MonoTouch.CoreGraphics.CGColor[]
{
UIColor.FromRGBA(65, 75, 73, 255).CGColor,
UIColor.FromRGBA(40, 46, 45, 255).CGColor
};
CALayer topEdge = new CALayer();
topEdge.Frame = new RectangleF(0, 0, frame.Width, 1.5f);
topEdge.BackgroundColor = UIColor.FromRGBA(90, 99, 97, 255).CGColor;
backgroundLayer.AddSublayer(topEdge);
return backgroundLayer;
}