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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// 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;
namespace System.Windows
{
/// <summary>
/// PointConverter - Converter class for converting instances of other types to Point instances
/// </summary>
/// <ExternalAPI/>
public class KeySplineConverter : TypeConverter
{
/// <summary>
/// CanConvertFrom - Returns whether or not this class can convert from a given type
/// </summary>
/// <ExternalAPI/>
public override bool CanConvertFrom(ITypeDescriptorContext typeDescriptor, Type destinationType)
{
if (destinationType == typeof(string))
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// TypeConverter method override.
/// </summary>
/// <param name="context">ITypeDescriptorContext</param>
/// <param name="destinationType">Type to convert to</param>
/// <returns>true if conversion is possible</returns>
/// <ExternalAPI/>
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
if ( destinationType == typeof(InstanceDescriptor)
|| destinationType == typeof(string))
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// ConvertFrom
/// </summary>
public override object ConvertFrom(
ITypeDescriptorContext context,
CultureInfo cultureInfo,
object value)
{
string stringValue = value as string;
if (value == null)
{
throw new NotSupportedException(SR.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));
}
/// <summary>
/// TypeConverter method implementation.
/// </summary>
/// <param name="context">ITypeDescriptorContext</param>
/// <param name="cultureInfo">current culture (see CLR specs), null is a valid value</param>
/// <param name="value">value to convert from</param>
/// <param name="destinationType">Type to convert to</param>
/// <returns>converted value</returns>
/// <ExternalAPI/>
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);
}
}
}
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