KeySplineConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / Animation / KeySplineConverter.cs / 1305600 / KeySplineConverter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
//  Microsoft Avalon
//  Copyright (c) Microsoft Corporation, 2001-2003
//
//  File: KeySplineConverter.cs 
//-----------------------------------------------------------------------------
 
// Allow suppression of certain presharp messages 
#pragma warning disable 1634, 1691
 
using MS.Internal;
using System;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization; 
using System.Globalization;
using System.Reflection; 
using System.Windows.Media.Animation; 
using System.Security;
 
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID;

namespace System.Windows 
{
    ///  
    /// PointConverter - Converter class for converting instances of other types to Point instances 
    /// 
    ///  
    public class KeySplineConverter : TypeConverter
    {

        ///  
        /// CanConvertFrom - Returns whether or not this class can convert from a given type
        ///  
        ///  
        public override bool CanConvertFrom(ITypeDescriptorContext typeDescriptor, Type destinationType)
        { 
            if (destinationType == typeof(string))
            {
                return true;
            } 
            else
            { 
                return false; 
            }
        } 

        /// 
        /// TypeConverter method override.
        ///  
        /// ITypeDescriptorContext
        /// Type to convert to 
        /// true if conversion is possible 
        /// 
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) 
        {
            if (   destinationType == typeof(InstanceDescriptor)
                || destinationType == typeof(string))
            { 
                return true;
            } 
            else 
            {
                return false; 
            }
        }

        ///  
        /// ConvertFrom
        ///  
        public override object ConvertFrom( 
            ITypeDescriptorContext context,
            CultureInfo cultureInfo, 
            object value)
        {

            string stringValue = value as string; 

            if (value == null) 
            { 
                throw new NotSupportedException(SR.Get(SRID.Converter_ConvertFromNotSupported));
            } 

            TokenizerHelper th = new TokenizerHelper(stringValue, cultureInfo);

            return new KeySpline( 
                Convert.ToDouble(th.NextTokenRequired(), cultureInfo),
                Convert.ToDouble(th.NextTokenRequired(), cultureInfo), 
                Convert.ToDouble(th.NextTokenRequired(), cultureInfo), 
                Convert.ToDouble(th.NextTokenRequired(), cultureInfo));
        } 

        /// 
        /// TypeConverter method implementation.
        ///  
        /// ITypeDescriptorContext
        /// current culture (see CLR specs), null is a valid value 
        /// value to convert from 
        /// Type to convert to
        /// converted value 
        /// 
        ///
        ///     Critical: calls InstanceDescriptor ctor which LinkDemands
        ///     PublicOK: can only make an InstanceDescriptor for KeySpline, not an arbitrary class 
        ///
        [SecurityCritical] 
        public override object ConvertTo( 
            ITypeDescriptorContext context,
            CultureInfo cultureInfo, 
            object value,
            Type destinationType)
        {
            KeySpline keySpline = value as KeySpline; 

            if (keySpline != null && destinationType != null) 
            { 
                if (destinationType == typeof(InstanceDescriptor))
                { 
                    ConstructorInfo ci = typeof(KeySpline).GetConstructor(new Type[]
                        {
                            typeof(double), typeof(double),
                            typeof(double), typeof(double) 
                        });
 
                    return new InstanceDescriptor(ci, new object[] 
                        {
                            keySpline.ControlPoint1.X, keySpline.ControlPoint1.Y, 
                            keySpline.ControlPoint2.X, keySpline.ControlPoint2.Y
                        });
                }
                else if (destinationType == typeof(string)) 
                {
#pragma warning disable 56506 // Suppress presharp warning: Parameter 'cultureInfo.TextInfo' to this public method must be validated:  A null-dereference can occur here. 
                    return String.Format( 
                        cultureInfo,
                        "{0}{4}{1}{4}{2}{4}{3}", 
                        keySpline.ControlPoint1.X,
                        keySpline.ControlPoint1.Y,
                        keySpline.ControlPoint2.X,
                        keySpline.ControlPoint2.Y, 
                        cultureInfo != null ? cultureInfo.TextInfo.ListSeparator : CultureInfo.InvariantCulture.TextInfo.ListSeparator);
#pragma warning restore 56506 
                } 
            }
 
            // Pass unhandled cases to base class (which will throw exceptions for null value or destinationType.)
            return base.ConvertTo(context, cultureInfo, value, destinationType);
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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