DynamicContainer.cs

using System.Threading.Tasks;
 
namespace Waher.Layout.Layout2D.Model
{
    public abstract class DynamicContainer : LayoutContainer, IDynamicChildren
    {
        public DynamicContainer(Layout2DDocument Document, ILayoutElement Parent)
            : base(Document, Parent)
        {
        }
 
        public abstract ILayoutElement[] DynamicChildren
        {
            get;
        }
 
        public override async Task Draw(DrawingState State)
        {
            ILayoutElement[] Children = this.DynamicChildren;
 
            if (!(Children is null))
            {
                foreach (ILayoutElement E in Children)
                {
                    if (E.IsVisible)
                        await E.Draw(State);
                }
            }
        }
 
        public override void MeasurePositions(DrawingState State)
        {
            base.MeasurePositions(State);
 
            ILayoutElement[] Children = this.DynamicChildren;
 
            if (!(Children is null))
            {
                foreach (ILayoutElement E in Children)
                {
                    if (E.IsVisible)
                        E.MeasurePositions(State);
                }
            }
        }
 
        protected override bool MeasureChildrenPositions => false;
 
    }
}