Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / Animation / RepeatBehaviorConverter.cs / 1305600 / RepeatBehaviorConverter.cs
//------------------------------------------------------------------------------ // Microsoft Windows Client Platform // Copyright (c) Microsoft Corporation, 2004 // // File: RepeatBehaviorConverter.cs //----------------------------------------------------------------------------- using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Security; namespace System.Windows.Media.Animation { ////// /// public sealed class RepeatBehaviorConverter : TypeConverter { #region Data private static char[] _iterationCharacter = new char[] { 'x' }; #endregion ////// CanConvertFrom - Returns whether or not this class can convert from a given type /// ///public override bool CanConvertFrom(ITypeDescriptorContext td, Type t) { if (t == 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 td, CultureInfo cultureInfo, object value) { string stringValue = value as string; if (stringValue != null) { stringValue = stringValue.Trim(); if (stringValue == "Forever") { return RepeatBehavior.Forever; } else if ( stringValue.Length > 0 && stringValue[stringValue.Length - 1] == _iterationCharacter[0]) { string stringDoubleValue = stringValue.TrimEnd(_iterationCharacter); double doubleValue = (double)TypeDescriptor.GetConverter(typeof(double)).ConvertFrom(td, cultureInfo, stringDoubleValue); return new RepeatBehavior(doubleValue); } } // The value is not Forever or an iteration count so it's either a TimeSpan // or we'll let the TimeSpanConverter raise the appropriate exception. TimeSpan timeSpanValue = (TimeSpan)TypeDescriptor.GetConverter(typeof(TimeSpan)).ConvertFrom(td, cultureInfo, stringValue); return new RepeatBehavior(timeSpanValue); } /// /// TypeConverter method implementation. /// /// ITypeDescriptorContext /// current culture (see CLR specs) /// value to convert from /// Type to convert to ///converted value ////// /// Critical: calls InstanceDescriptor ctor which LinkDemands /// PublicOK: can only make an InstanceDescriptor for RepeatBehavior, not an arbitrary class /// [SecurityCritical] public override object ConvertTo( ITypeDescriptorContext context, CultureInfo cultureInfo, object value, Type destinationType) { if ( value is RepeatBehavior && destinationType != null) { RepeatBehavior repeatBehavior = (RepeatBehavior)value; if (destinationType == typeof(InstanceDescriptor)) { MemberInfo mi; if (repeatBehavior == RepeatBehavior.Forever) { mi = typeof(RepeatBehavior).GetProperty("Forever"); return new InstanceDescriptor(mi, null); } else if (repeatBehavior.HasCount) { mi = typeof(RepeatBehavior).GetConstructor(new Type[] { typeof(double) }); return new InstanceDescriptor(mi, new object[] { repeatBehavior.Count }); } else if (repeatBehavior.HasDuration) { mi = typeof(RepeatBehavior).GetConstructor(new Type[] { typeof(TimeSpan) }); return new InstanceDescriptor(mi, new object[] { repeatBehavior.Duration }); } else { Debug.Fail("Unknown type of RepeatBehavior passed to RepeatBehaviorConverter."); } } else if (destinationType == typeof(string)) { return repeatBehavior.InternalToString(null, cultureInfo); } } // We can't do the conversion, let the base class raise the // appropriate exception. 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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