protected override void OnElementChanged(ElementChangedEventArgs <StackLayout> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
if (!(e.NewElement is GradientLayout stack))
{
return;
}
Colors = stack.Colors;
Mode = stack.Mode;
UpdateBackgroundColor();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(@"ERROR:", ex.Message);
}
}
private GradientDrawable.Orientation ToJavaOrintation(GradientColorStackMode orintatinColors)
{
switch (orintatinColors)
{
case GradientColorStackMode.BlTr:
return(GradientDrawable.Orientation.BlTr);
case GradientColorStackMode.BottomTop:
return(GradientDrawable.Orientation.BottomTop);
case GradientColorStackMode.BrTl:
return(GradientDrawable.Orientation.BrTl);
case GradientColorStackMode.LeftRight:
return(GradientDrawable.Orientation.LeftRight);
case GradientColorStackMode.RightLeft:
return(GradientDrawable.Orientation.RightLeft);
case GradientColorStackMode.TlBr:
return(GradientDrawable.Orientation.TlBr);
case GradientColorStackMode.TopBottom:
return(GradientDrawable.Orientation.TopBottom);
case GradientColorStackMode.TrBl:
return(GradientDrawable.Orientation.TrBl);
default:
throw new Exception("Wrong value");
}
}
protected override void OnElementChanged(ElementChangedEventArgs <StackLayout> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
if (e.NewElement is StackLayoutCustom layout)
{
//Colors = layout.Colors;
Mode = layout.Mode;
ThirdColor = layout.ThirdColor;
FirstColor = layout.FirstColor;
SecoundColor = layout.SecoundColor;
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(@"ERROR:", ex.Message);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <StackLayout> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
var layout = (GradientLayout)e.NewElement;
Colors = layout.Colors;
Mode = layout.Mode;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(@"ERROR:", ex.Message);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Frame> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
if (e.NewElement is GradientColorContent layout)
{
Colors = layout.Colors;
Mode = layout.Mode;
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(@"ERROR:", ex.Message);
}
}
protected override void DispatchDraw(global::Android.Graphics.Canvas canvas)
{
GradientLayout layout = (GradientLayout)this.Element;
Color[] Colors = layout.Colors;
GradientColorStackMode Mode = layout.Mode;
int[] colors = new int[Colors.Length];
for (int i = 0, l = Colors.Length; i < l; i++)
{
colors[i] = Colors[i].ToAndroid().ToArgb();
}
// temporary workaround for Android 9 PIE
if (Android.OS.Build.VERSION.SdkInt > Android.OS.BuildVersionCodes.O)
{
GradientDrawable.Orientation orientation;
switch (Mode)
{
default:
case GradientColorStackMode.ToRight:
orientation = GradientDrawable.Orientation.LeftRight;
break;
case GradientColorStackMode.ToTop:
orientation = GradientDrawable.Orientation.BottomTop;
break;
case GradientColorStackMode.ToBottom:
orientation = GradientDrawable.Orientation.TopBottom;
break;
case GradientColorStackMode.ToTopLeft:
orientation = GradientDrawable.Orientation.BrTl;
break;
case GradientColorStackMode.ToTopRight:
orientation = GradientDrawable.Orientation.BlTr;
break;
case GradientColorStackMode.ToBottomLeft:
orientation = GradientDrawable.Orientation.TrBl;
break;
case GradientColorStackMode.ToBottomRight:
orientation = GradientDrawable.Orientation.TlBr;
break;
}
var gradient2 = new GradientDrawable(orientation, colors);
ViewCompat.SetBackground(this, gradient2);
base.DispatchDraw(canvas);
return;
}
Android.Graphics.LinearGradient gradient;
switch (Mode)
{
default:
case GradientColorStackMode.ToRight:
gradient = new Android.Graphics.LinearGradient(0, 0, Width, 0, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
case GradientColorStackMode.ToLeft:
gradient = new Android.Graphics.LinearGradient(Width, 0, 0, 0, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
case GradientColorStackMode.ToTop:
gradient = new Android.Graphics.LinearGradient(0, Height, 0, 0, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
case GradientColorStackMode.ToBottom:
gradient = new Android.Graphics.LinearGradient(0, 0, 0, Height, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
case GradientColorStackMode.ToTopLeft:
gradient = new Android.Graphics.LinearGradient(Width, Height, 0, 0, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
case GradientColorStackMode.ToTopRight:
gradient = new Android.Graphics.LinearGradient(0, Height, Width, 0, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
case GradientColorStackMode.ToBottomLeft:
gradient = new Android.Graphics.LinearGradient(Width, 0, 0, Height, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
case GradientColorStackMode.ToBottomRight:
gradient = new Android.Graphics.LinearGradient(0, 0, Width, Height, colors, null, Android.Graphics.Shader.TileMode.Mirror);
break;
}
var paint = new Android.Graphics.Paint()
{
Dither = true,
};
paint.SetShader(gradient);
canvas.DrawPaint(paint);
base.DispatchDraw(canvas);
}
