// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
//
// Description:
// Implementation of Line shape element.
//
 
using System.Windows.Media;
using System.ComponentModel;
 
namespace System.Windows.Shapes
{
    /// <summary>
    /// The line shape element
    /// This element (like all shapes) belongs under a Canvas,
    /// and will be presented by the parent canvas.
    /// </summary>
    public sealed class Line : Shape
    {
        #region Constructors
 
        /// <summary>
        /// Instantiates a new instance of a line.
        /// </summary>
        public Line()
        {
        }
 
        #endregion Constructors
 
        #region Dynamic Properties
 
        /// <summary>
        /// X1 property
        /// </summary>
        public static readonly DependencyProperty X1Property =
            DependencyProperty.Register( "X1", typeof(double), typeof(Line), 
                new FrameworkPropertyMetadata(0d, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender),
                new ValidateValueCallback(Shape.IsDoubleFinite));
 
        /// <summary>
        /// X1 property
        /// </summary>
        [TypeConverter(typeof(LengthConverter))]
        public double X1
        {
            get
            {
                return (double)GetValue(X1Property);
            }
            set
            {
                SetValue(X1Property, value);
            }
        }
 
        /// <summary>
        /// Y1 property
        /// </summary>
        public static readonly DependencyProperty Y1Property =
            DependencyProperty.Register( "Y1", typeof(double), typeof(Line),
                new FrameworkPropertyMetadata(0d, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender),
                new ValidateValueCallback(Shape.IsDoubleFinite));
 
        /// <summary>
        /// Y1 property
        /// </summary>
        [TypeConverter(typeof(LengthConverter))]
        public double Y1
        {
            get
            {
                return (double)GetValue(Y1Property);
            }
            set
            {
                SetValue(Y1Property, value);
            }
        }
 
        /// <summary>
        /// X2 property
        /// </summary>
        public static readonly DependencyProperty X2Property =
            DependencyProperty.Register( "X2", typeof(double), typeof(Line),
                new FrameworkPropertyMetadata(0d, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender),
                new ValidateValueCallback(Shape.IsDoubleFinite));
 
        /// <summary>
        /// X2 property
        /// </summary>
        [TypeConverter(typeof(LengthConverter))]
        public double X2
        {
            get
            {
                return (double)GetValue(X2Property);
            }
            set
            {
                SetValue(X2Property, value);
            }
        }
 
        /// <summary>
        /// Y2 property
        /// </summary>
        public static readonly DependencyProperty Y2Property =
            DependencyProperty.Register( "Y2", typeof(double), typeof(Line),
                new FrameworkPropertyMetadata(0d, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender),
                new ValidateValueCallback(Shape.IsDoubleFinite));
 
        /// <summary>
        /// Y2 property
        /// </summary>
        [TypeConverter(typeof(LengthConverter))]
        public double Y2
        {
            get
            {
                return (double)GetValue(Y2Property);
            }
            set
            {
                SetValue(Y2Property, value);
            }
        }
 
 
        #endregion Dynamic Properties
 
        #region Protected Methods and Properties
 
        
        /// <summary>
        /// Get the line that defines this shape
        /// </summary>
        protected override Geometry DefiningGeometry
        {
            get
            {
                return _lineGeometry;
            }
        }
 
        #endregion
 
        #region Internal Methods
        internal override void CacheDefiningGeometry()
        {
            Point point1 = new Point(X1, Y1);
            Point point2 = new Point(X2, Y2);
 
            // Create the Line geometry
            _lineGeometry = new LineGeometry(point1, point2);
        }
        #endregion Internal Methods
 
        #region Private Methods and Members
 
        private LineGeometry _lineGeometry;
 
        #endregion
   }
}