public override void Draw(CGRect rect)
{
base.Draw(rect);
GradientColorStack stack = Element as GradientColorStack;
CGColor startColor = stack?.StartColor.ToCGColor();
CGColor endColor = stack?.EndColor.ToCGColor();
var gradientLayer = new CAGradientLayer();
#region gradient direction
var startPoint = new PointF
{
X = 0,
Y = 1
};
var endPoint = new PointF
{
X = 1,
Y = 0
};
#endregion
gradientLayer.StartPoint = startPoint;
gradientLayer.EndPoint = endPoint;
gradientLayer.Frame = rect;
gradientLayer.Colors = new[] { startColor, endColor };
NativeView.Layer.InsertSublayer(gradientLayer, 0);
}
public override void Draw(CGRect rect)
{
base.Draw(rect);
GradientColorStack stack = (GradientColorStack)this.Element;
CGColor startColor = stack.StartColor.ToCGColor();
CGColor endColor = stack.EndColor.ToCGColor();
#region for Vertical Gradient
var gradientLayer = new CAGradientLayer();
#endregion
#region for Horizontal Gradient
//var gradientLayer = new CAGradientLayer()
//{
// StartPoint = new CGPoint(0, 0.5),
// EndPoint = new CGPoint(1, 0.5)
//};
#endregion
gradientLayer.Frame = rect;
gradientLayer.Colors = new CGColor[] { startColor, endColor };
NativeView.Layer.InsertSublayer(gradientLayer, 0);
}
protected override void OnElementChanged(ElementChangedEventArgs <StackLayout> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
GradientColorStack stack = e.NewElement as GradientColorStack;
this.StartColor = stack.StartColor;
this.EndColor = stack.EndColor;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(@"ERROR:", ex.Message);
}
}
public override void Draw(CGRect rect)
{
base.Draw(rect);
GradientColorStack stack = (GradientColorStack)this.Element;
CGColor startColor = ToCGColor(stack.StartColor);
CGColor endColor = ToCGColor(stack.EndColor);
var gradientLayer = new CAGradientLayer()
{
StartPoint = new CGPoint(0, 0.5),
EndPoint = new CGPoint(1, 0.5)
};
gradientLayer.Frame = rect;
gradientLayer.Colors = new CGColor[] { startColor, endColor };
NativeView.Layer.InsertSublayer(gradientLayer, 0);
}
public override void Draw(CGRect rect)
{
base.Draw(rect);
GradientColorStack stack = (GradientColorStack)this.Element;
CGColor startColor = stack.StartColor.ToCGColor();
CGColor endColor = stack.EndColor.ToCGColor();
var gradientLayer = new CAGradientLayer();
if (stack.GradientOrientation == GradientOrientation.Horizontal)
{
gradientLayer = new CAGradientLayer
{
StartPoint = new CGPoint(0, 0.5),
EndPoint = new CGPoint(1, 0.5),
Frame = rect,
Colors = new[] { startColor, endColor }
};
}
NativeView.Layer.InsertSublayer(gradientLayer, 0);
}
public HeaderCell()
{
this.Height = 35;
var title = new Label
{
Font = Font.SystemFontOfSize(14, FontAttributes.Bold),
TextColor = Color.White,
VerticalOptions = LayoutOptions.Center
};
title.SetBinding(Label.TextProperty, "Key");
View = new GradientColorStack
{
StartColor = Color.FromHex("#00008b"),
EndColor = Color.FromHex("#ffffff"),
HorizontalOptions = LayoutOptions.FillAndExpand,
HeightRequest = 25,
// BackgroundColor = Color.FromHex("#008060"),
Padding = 5,
Orientation = StackOrientation.Horizontal,
Children = { title }
};
}
public override void Draw(CGRect rect)
{
base.Draw(rect);
GradientColorStack layout = (GradientColorStack)Element;
CGColor[] colors = new CGColor[layout.Colors.Length];
for (int i = 0, l = colors.Length; i < l; i++)
{
colors[i] = layout.Colors[i].ToCGColor();
}
var gradientLayer = new CAGradientLayer();
switch (layout.Mode)
{
default:
case GradientColorStackMode.ToRight:
gradientLayer.StartPoint = new CGPoint(0, 0.5);
gradientLayer.EndPoint = new CGPoint(1, 0.5);
break;
case GradientColorStackMode.ToLeft:
gradientLayer.StartPoint = new CGPoint(1, 0.5);
gradientLayer.EndPoint = new CGPoint(0, 0.5);
break;
case GradientColorStackMode.ToTop:
gradientLayer.StartPoint = new CGPoint(0.5, 0);
gradientLayer.EndPoint = new CGPoint(0.5, 1);
break;
case GradientColorStackMode.ToBottom:
gradientLayer.StartPoint = new CGPoint(0.5, 1);
gradientLayer.EndPoint = new CGPoint(0.5, 0);
break;
case GradientColorStackMode.ToTopLeft:
gradientLayer.StartPoint = new CGPoint(1, 0);
gradientLayer.EndPoint = new CGPoint(0, 1);
break;
case GradientColorStackMode.ToTopRight:
gradientLayer.StartPoint = new CGPoint(0, 1);
gradientLayer.EndPoint = new CGPoint(1, 0);
break;
case GradientColorStackMode.ToBottomLeft:
gradientLayer.StartPoint = new CGPoint(1, 1);
gradientLayer.EndPoint = new CGPoint(0, 0);
break;
case GradientColorStackMode.ToBottomRight:
gradientLayer.StartPoint = new CGPoint(0, 0);
gradientLayer.EndPoint = new CGPoint(1, 1);
break;
}
gradientLayer.Frame = rect;
gradientLayer.Colors = colors;
NativeView.Layer.InsertSublayer(gradientLayer, 0);
}
