/
BoundsConstraint.cs
42 lines (35 loc) · 1.04 KB
/
BoundsConstraint.cs
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using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using Xamarin.Forms.Internals;
namespace Xamarin.Forms
{
public class BoundsConstraint
{
Func<Rectangle> _measureFunc;
BoundsConstraint()
{
}
internal bool CreatedFromExpression { get; set; }
internal IEnumerable<View> RelativeTo { get; set; }
public static BoundsConstraint FromExpression(Expression<Func<Rectangle>> expression, IEnumerable<View> parents = null)
{
return FromExpression(expression, false, parents);
}
internal static BoundsConstraint FromExpression(Expression<Func<Rectangle>> expression, bool fromExpression, IEnumerable<View> parents = null)
{
Func<Rectangle> compiled = expression.Compile();
var result = new BoundsConstraint
{
_measureFunc = compiled,
RelativeTo = parents ?? ExpressionSearch.Default.FindObjects<View>(expression).ToArray(), // make sure we have our own copy
CreatedFromExpression = fromExpression
};
return result;
}
internal Rectangle Compute()
{
return _measureFunc();
}
}
}