[Closed] Relative Layout Extensions

[danielftz]

I have made an extension class for RelativeLayout. It might have traded some performance for the sake of being declarative, particularly the Add() method.

public static class RelativeLayoutExtension
{
      public static void Add<TView>(this RelativeLayout layout, TView view) where TView : View
      {
	      layout.Children.Add(view, RelativeLayout.GetXConstraint(view),
		            RelativeLayout.GetYConstraint(view),
	                    RelativeLayout.GetWidthConstraint(view),
	                    RelativeLayout.GetHeightConstraint(view));
      }
      
      public static void Remove<TView>(this RelativeLayout layout, TView view) where TView : View
      {
	      layout.Children.Remove(view);
      }
      
      #region XConstraint
      public static TView XConstraint<TView>(this TView view, double constant) where TView : View
      {
	      RelativeLayout.SetXConstraint(view, Constraint.Constant(constant));
	      return view;
      }
      
      public static TView XConstraint<TView>(this TView view, Func<RelativeLayout, double> constraint) where TView : View
      {
	      RelativeLayout.SetXConstraint(view, Constraint.RelativeToParent(constraint));
	      return view;
      }
      
      public static TView XConstraint<TView, SView>(this TView view, SView sibling, Func<RelativeLayout, View, double> measure) where TView : View where SView : View
      {
	      RelativeLayout.SetXConstraint(view, Constraint.RelativeToView(sibling, measure));
	      return view;
      }
      #endregion
      
      
      #region YConstraint
      public static TView YConstraint<TView>(this TView view, double constant) where TView : View
      {
	      RelativeLayout.SetYConstraint(view, Constraint.Constant(constant));
	      return view;
      }
      
      public static TView YConstraint<TView>(this TView view, Func<RelativeLayout, double> constraint) where TView : View
      {
	      RelativeLayout.SetYConstraint(view, Constraint.RelativeToParent(constraint));
	      return view;
      }
      
      public static TView YConstraint<TView, SView>(this TView view, SView sibling, Func<RelativeLayout, View, double> measure) where TView : View where SView : View
      {
	      RelativeLayout.SetYConstraint(view, Constraint.RelativeToView(sibling, measure));
	      return view;
      }
      #endregion
      
      
      #region WidthConstraint
      public static TView WidthConstraint<TView>(this TView view, double constant) where TView : View
      {
	      RelativeLayout.SetWidthConstraint(view, Constraint.Constant(constant));
	      return view;
      }
      
      public static TView WidthConstraint<TView>(this TView view, Func<RelativeLayout, double> constraint) where TView : View
      {
	      RelativeLayout.SetWidthConstraint(view, Constraint.RelativeToParent(constraint));
	      return view;
      }
      
      public static TView WidthConstraint<TView, SView>(this TView view, SView sibling, Func<RelativeLayout, View, double> measure) where TView : View where SView : View
      {
	      RelativeLayout.SetWidthConstraint(view, Constraint.RelativeToView(sibling, measure));
	      return view;
      }
      #endregion
      
      
      #region HeightConstraint
      public static TView HeightConstraint<TView>(this TView view, double constant) where TView : View
      {
	      RelativeLayout.SetHeightConstraint(view, Constraint.Constant(constant));
	      return view;
      }
      
      public static TView HeightConstraint<TView>(this TView view, Func<RelativeLayout, double> constraint) where TView : View
      {
	      RelativeLayout.SetHeightConstraint(view, Constraint.RelativeToParent(constraint));
	      return view;
      }
      
      public static TView HeightConstraint<TView, SView>(this TView view, SView sibling, Func<RelativeLayout, View, double> measure) where TView : View where SView : View
      {
	      RelativeLayout.SetHeightConstraint(view, Constraint.RelativeToView(sibling, measure));
	      return view;
      }
      #endregion
}

[danielftz]

@brminnick

[brminnick]

Thanks @danielftz!

I’ll double check whether or not .NET MAUI will support ReleativeLayout. When .NET MAUI first started, RelativeLayout was not going to be supported which is why I initially didn’t add support for it in CommunityToolkit.Maui.Markup.

[brminnick]

@danielftz RelativeLayout is not included in .NET MAUI: https://github.com/dotnet/maui/tree/main/src/Controls/src/Core/Layout

[danielftz]

I know it is part of the Compatibility library. Does that mean it will be removed after GA?

[brminnick]

I'm not sure exactly what the team's plans for the Compatibility is. I would guess that it'll be removed after Xamarin.Forms reaches end-of-life.

But for folks wanting the RelativeLayout Markup Extensions, they can use the Xamarin.CommunityToolkit.Markup.MauiCompat NuGet Package

[CliffAgius]

Closed and answered