PartialCornerBorder.cs

using System.Windows;
using System.Windows.Controls;

namespace CommonControlParts
{
    /// <summary>
    /// 4つの角のCornerRadiusをXAMLから個別に指定できるようにしたBorder
    /// </summary>
    public class PartialCornerBorder : Border
    {
        #region 依存関係プロパティ TopLeftCornerRadius

        public double TopLeftCornerRadius
        {
            get { return (double)this.GetValue(TopLeftCornerRadiusProperty); }
            set { this.SetValue(TopLeftCornerRadiusProperty, value); }
        }

        public static readonly DependencyProperty TopLeftCornerRadiusProperty = DependencyProperty.Register(
        "TopLeftCornerRadius", typeof(double), typeof(PartialCornerBorder), new PropertyMetadata(0.0,
            (d, e) =>
            {
                PartialCornerBorder b = d as PartialCornerBorder;
                if (b != null)
                {
                    b.CornerRadius = new CornerRadius(
                        (double)e.NewValue,
                        b.CornerRadius.TopRight,
                        b.CornerRadius.BottomRight,
                        b.CornerRadius.BottomLeft
                        );
                }
            }
            ));

        #endregion


        #region 依存関係プロパティ TopRightCornerRadius

        public double TopRightCornerRadius
        {
            get { return (double)this.GetValue(TopRightCornerRadiusProperty); }
            set { this.SetValue(TopRightCornerRadiusProperty, value); }
        }

        public static readonly DependencyProperty TopRightCornerRadiusProperty = DependencyProperty.Register(
        "TopRightCornerRadius", typeof(double), typeof(PartialCornerBorder), new PropertyMetadata(0.0,
            (d, e) =>
            {
                PartialCornerBorder b = d as PartialCornerBorder;
                if (b != null)
                {
                    b.CornerRadius = new CornerRadius(
                        b.CornerRadius.TopLeft,
                        (double)e.NewValue,
                        b.CornerRadius.BottomRight,
                        b.CornerRadius.BottomLeft
                        );
                }
            }
            ));

        #endregion


        #region 依存関係プロパティ BottomRightCornerRadius

        public double BottomRightCornerRadius
        {
            get { return (double)this.GetValue(BottomRightCornerRadiusProperty); }
            set { this.SetValue(BottomRightCornerRadiusProperty, value); }
        }

        public static readonly DependencyProperty BottomRightCornerRadiusProperty = DependencyProperty.Register(
        "BottomRightCornerRadius", typeof(double), typeof(PartialCornerBorder), new PropertyMetadata(0.0,
            (d, e) =>
            {
                PartialCornerBorder b = d as PartialCornerBorder;
                if (b != null)
                {
                    b.CornerRadius = new CornerRadius(
                        b.CornerRadius.TopLeft,
                        b.CornerRadius.TopRight,
                        (double)e.NewValue,
                        b.CornerRadius.BottomLeft
                        );
                }
            }
            ));

        #endregion


        #region 依存関係プロパティ BottomLeftCornerRadius

        public double BottomLeftCornerRadius
        {
            get { return (double)this.GetValue(BottomLeftCornerRadiusProperty); }
            set { this.SetValue(BottomLeftCornerRadiusProperty, value); }
        }

        public static readonly DependencyProperty BottomLeftCornerRadiusProperty = DependencyProperty.Register(
        "BottomLeftCornerRadius", typeof(double), typeof(PartialCornerBorder), new PropertyMetadata(0.0,
            (d, e) =>
            {
                PartialCornerBorder b = d as PartialCornerBorder;
                if (b != null)
                {
                    b.CornerRadius = new CornerRadius(
                        b.CornerRadius.TopLeft,
                        b.CornerRadius.TopRight,
                        b.CornerRadius.BottomRight,
                        (double)e.NewValue
                        );
                }
            }
            ));

        #endregion
    }
}