ThicknessConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Framework / System / Windows / ThicknessConverter.cs / 1 / ThicknessConverter.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: ThicknessConverter.cs 
//
// Description: Contains the ThicknessConverter: TypeConverter for the Thicknessclass. 
// 
// History:
//  07/09/2003 : greglett - Added to WCP branch (was contained in BoxUnitThickness.cs in old Avalon) 
//
//---------------------------------------------------------------------------

using System; 
using System.ComponentModel;
using System.ComponentModel.Design.Serialization; 
using System.Globalization; 
using System.Reflection;
using System.Text; 
using System.Windows;
using System.Security;
using MS.Internal;
using MS.Utility; 

#pragma warning disable 1634, 1691  // suppressing PreSharp warnings 
 
namespace System.Windows
{ 
    /// 
    /// ThicknessConverter - Converter class for converting instances of other types to and from Thickness instances.
    /// 
    public class ThicknessConverter : TypeConverter 
    {
        #region Public Methods 
 
        /// 
        /// CanConvertFrom - Returns whether or not this class can convert from a given type. 
        /// 
        /// 
        /// bool - True if thie converter can convert from the provided type, false if not.
        ///  
        ///  The ITypeDescriptorContext for this call. 
        ///  The Type being queried for support.  
        public override bool CanConvertFrom(ITypeDescriptorContext typeDescriptorContext, Type sourceType) 
        {
            // We can only handle strings, integral and floating types 
            TypeCode tc = Type.GetTypeCode(sourceType);
            switch (tc)
            {
                case TypeCode.String: 
                case TypeCode.Decimal:
                case TypeCode.Single: 
                case TypeCode.Double: 
                case TypeCode.Int16:
                case TypeCode.Int32: 
                case TypeCode.Int64:
                case TypeCode.UInt16:
                case TypeCode.UInt32:
                case TypeCode.UInt64: 
                    return true;
 
                default: 
                    return false;
            } 
        }

        /// 
        /// CanConvertTo - Returns whether or not this class can convert to a given type. 
        /// 
        ///  
        /// bool - True if this converter can convert to the provided type, false if not. 
        /// 
        ///  The ITypeDescriptorContext for this call.  
        ///  The Type being queried for support. 
        public override bool CanConvertTo(ITypeDescriptorContext typeDescriptorContext, Type destinationType)
        {
            // We can convert to an InstanceDescriptor or to a string. 
            if (    destinationType == typeof(InstanceDescriptor)
                ||  destinationType == typeof(string)) 
            { 
                return true;
            } 
            else
            {
                return false;
            } 
        }
 
        ///  
        /// ConvertFrom - Attempt to convert to a Thickness from the given object
        ///  
        /// 
        /// The Thickness which was constructed.
        /// 
        ///  
        /// An ArgumentNullException is thrown if the example object is null.
        ///  
        ///  
        /// An ArgumentException is thrown if the example object is not null and is not a valid type
        /// which can be converted to a Thickness. 
        /// 
        ///  The ITypeDescriptorContext for this call. 
        ///  The CultureInfo which is respected when converting. 
        ///  The object to convert to a Thickness.  
        public override object ConvertFrom(ITypeDescriptorContext typeDescriptorContext, CultureInfo cultureInfo, object source)
        { 
            if (source != null) 
            {
                if (source is string)      { return FromString((string)source, cultureInfo); } 
                else if (source is double) { return new Thickness((double)source); }
                else                       { return new Thickness(Convert.ToDouble(source, cultureInfo)); }
            }
            throw GetConvertFromException(source); 
        }
 
        ///  
        /// ConvertTo - Attempt to convert a Thickness to the given type
        ///  
        /// 
        /// The object which was constructoed.
        /// 
        ///  
        /// An ArgumentNullException is thrown if the example object is null.
        ///  
        ///  
        /// An ArgumentException is thrown if the object is not null and is not a Thickness,
        /// or if the destinationType isn't one of the valid destination types. 
        /// 
        ///  The ITypeDescriptorContext for this call. 
        ///  The CultureInfo which is respected when converting. 
        ///  The Thickness to convert.  
        /// The type to which to convert the Thickness instance. 
        /// 
        ///     Critical: calls InstanceDescriptor ctor which LinkDemands 
        ///     PublicOK: can only make an InstanceDescriptor for Thickness, not an arbitrary class
        /// 
        [SecurityCritical]
        public override object ConvertTo(ITypeDescriptorContext typeDescriptorContext, CultureInfo cultureInfo, object value, Type destinationType)
        {
            if (null == value) 
            {
                throw new ArgumentNullException("value"); 
            } 

            if (null == destinationType) 
            {
                throw new ArgumentNullException("destinationType");
            }
 
            if (!(value is Thickness))
            { 
                #pragma warning suppress 6506 // value is obviously not null 
                throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, value.GetType(), typeof(Thickness)), "value");
            } 

            Thickness th = (Thickness)value;
            if (destinationType == typeof(string)) { return ToString(th, cultureInfo); }
            if (destinationType == typeof(InstanceDescriptor)) 
            {
                ConstructorInfo ci = typeof(Thickness).GetConstructor(new Type[] { typeof(double), typeof(double), typeof(double), typeof(double) }); 
                return new InstanceDescriptor(ci, new object[] { th.Left, th.Top, th.Right, th.Bottom }); 
            }
 
            throw new ArgumentException(SR.Get(SRID.CannotConvertType, typeof(Thickness), destinationType.FullName));

        }
 

        #endregion Public Methods 
 
        //-------------------------------------------------------------------
        // 
        //  Internal Methods
        //
        //-------------------------------------------------------------------
 
        #region Internal Methods
 
        static internal string ToString(Thickness th, CultureInfo cultureInfo) 
        {
            char listSeparator = TokenizerHelper.GetNumericListSeparator(cultureInfo); 

            // Initial capacity [64] is an estimate based on a sum of:
            // 48 = 4x double (twelve digits is generous for the range of values likely)
            //  8 = 4x Unit Type string (approx two characters) 
            //  4 = 4x separator characters
            StringBuilder sb = new StringBuilder(64); 
 
            sb.Append(LengthConverter.ToString(th.Left, cultureInfo));
            sb.Append(listSeparator); 
            sb.Append(LengthConverter.ToString(th.Top, cultureInfo));
            sb.Append(listSeparator);
            sb.Append(LengthConverter.ToString(th.Right, cultureInfo));
            sb.Append(listSeparator); 
            sb.Append(LengthConverter.ToString(th.Bottom, cultureInfo));
            return sb.ToString(); 
        } 

        static internal Thickness FromString(string s, CultureInfo cultureInfo) 
        {
            TokenizerHelper th = new TokenizerHelper(s, cultureInfo);
            double[] lengths = new double[4];
            int i = 0; 

            // Peel off each double in the delimited list. 
            while (th.NextToken()) 
            {
                if (i >= 4) 
                {
                    i = 5;    // Set i to a bad value.
                    break;
                } 

                lengths[i] = LengthConverter.FromString(th.GetCurrentToken(), cultureInfo); 
                i++; 
            }
 
            // We have a reasonable interpreation for one value (all four edges), two values (horizontal, vertical),
            // and four values (left, top, right, bottom).
            switch (i)
            { 
                case 1:
                    return new Thickness(lengths[0]); 
 
                case 2:
                    return new Thickness(lengths[0], lengths[1], lengths[0], lengths[1]); 

                case 4:
                    return new Thickness(lengths[0], lengths[1], lengths[2], lengths[3]);
            } 

            throw new FormatException(SR.Get(SRID.InvalidStringThickness, s)); 
        } 

    #endregion 

    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: ThicknessConverter.cs 
//
// Description: Contains the ThicknessConverter: TypeConverter for the Thicknessclass. 
// 
// History:
//  07/09/2003 : greglett - Added to WCP branch (was contained in BoxUnitThickness.cs in old Avalon) 
//
//---------------------------------------------------------------------------

using System; 
using System.ComponentModel;
using System.ComponentModel.Design.Serialization; 
using System.Globalization; 
using System.Reflection;
using System.Text; 
using System.Windows;
using System.Security;
using MS.Internal;
using MS.Utility; 

#pragma warning disable 1634, 1691  // suppressing PreSharp warnings 
 
namespace System.Windows
{ 
    /// 
    /// ThicknessConverter - Converter class for converting instances of other types to and from Thickness instances.
    /// 
    public class ThicknessConverter : TypeConverter 
    {
        #region Public Methods 
 
        /// 
        /// CanConvertFrom - Returns whether or not this class can convert from a given type. 
        /// 
        /// 
        /// bool - True if thie converter can convert from the provided type, false if not.
        ///  
        ///  The ITypeDescriptorContext for this call. 
        ///  The Type being queried for support.  
        public override bool CanConvertFrom(ITypeDescriptorContext typeDescriptorContext, Type sourceType) 
        {
            // We can only handle strings, integral and floating types 
            TypeCode tc = Type.GetTypeCode(sourceType);
            switch (tc)
            {
                case TypeCode.String: 
                case TypeCode.Decimal:
                case TypeCode.Single: 
                case TypeCode.Double: 
                case TypeCode.Int16:
                case TypeCode.Int32: 
                case TypeCode.Int64:
                case TypeCode.UInt16:
                case TypeCode.UInt32:
                case TypeCode.UInt64: 
                    return true;
 
                default: 
                    return false;
            } 
        }

        /// 
        /// CanConvertTo - Returns whether or not this class can convert to a given type. 
        /// 
        ///  
        /// bool - True if this converter can convert to the provided type, false if not. 
        /// 
        ///  The ITypeDescriptorContext for this call.  
        ///  The Type being queried for support. 
        public override bool CanConvertTo(ITypeDescriptorContext typeDescriptorContext, Type destinationType)
        {
            // We can convert to an InstanceDescriptor or to a string. 
            if (    destinationType == typeof(InstanceDescriptor)
                ||  destinationType == typeof(string)) 
            { 
                return true;
            } 
            else
            {
                return false;
            } 
        }
 
        ///  
        /// ConvertFrom - Attempt to convert to a Thickness from the given object
        ///  
        /// 
        /// The Thickness which was constructed.
        /// 
        ///  
        /// An ArgumentNullException is thrown if the example object is null.
        ///  
        ///  
        /// An ArgumentException is thrown if the example object is not null and is not a valid type
        /// which can be converted to a Thickness. 
        /// 
        ///  The ITypeDescriptorContext for this call. 
        ///  The CultureInfo which is respected when converting. 
        ///  The object to convert to a Thickness.  
        public override object ConvertFrom(ITypeDescriptorContext typeDescriptorContext, CultureInfo cultureInfo, object source)
        { 
            if (source != null) 
            {
                if (source is string)      { return FromString((string)source, cultureInfo); } 
                else if (source is double) { return new Thickness((double)source); }
                else                       { return new Thickness(Convert.ToDouble(source, cultureInfo)); }
            }
            throw GetConvertFromException(source); 
        }
 
        ///  
        /// ConvertTo - Attempt to convert a Thickness to the given type
        ///  
        /// 
        /// The object which was constructoed.
        /// 
        ///  
        /// An ArgumentNullException is thrown if the example object is null.
        ///  
        ///  
        /// An ArgumentException is thrown if the object is not null and is not a Thickness,
        /// or if the destinationType isn't one of the valid destination types. 
        /// 
        ///  The ITypeDescriptorContext for this call. 
        ///  The CultureInfo which is respected when converting. 
        ///  The Thickness to convert.  
        /// The type to which to convert the Thickness instance. 
        /// 
        ///     Critical: calls InstanceDescriptor ctor which LinkDemands 
        ///     PublicOK: can only make an InstanceDescriptor for Thickness, not an arbitrary class
        /// 
        [SecurityCritical]
        public override object ConvertTo(ITypeDescriptorContext typeDescriptorContext, CultureInfo cultureInfo, object value, Type destinationType)
        {
            if (null == value) 
            {
                throw new ArgumentNullException("value"); 
            } 

            if (null == destinationType) 
            {
                throw new ArgumentNullException("destinationType");
            }
 
            if (!(value is Thickness))
            { 
                #pragma warning suppress 6506 // value is obviously not null 
                throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, value.GetType(), typeof(Thickness)), "value");
            } 

            Thickness th = (Thickness)value;
            if (destinationType == typeof(string)) { return ToString(th, cultureInfo); }
            if (destinationType == typeof(InstanceDescriptor)) 
            {
                ConstructorInfo ci = typeof(Thickness).GetConstructor(new Type[] { typeof(double), typeof(double), typeof(double), typeof(double) }); 
                return new InstanceDescriptor(ci, new object[] { th.Left, th.Top, th.Right, th.Bottom }); 
            }
 
            throw new ArgumentException(SR.Get(SRID.CannotConvertType, typeof(Thickness), destinationType.FullName));

        }
 

        #endregion Public Methods 
 
        //-------------------------------------------------------------------
        // 
        //  Internal Methods
        //
        //-------------------------------------------------------------------
 
        #region Internal Methods
 
        static internal string ToString(Thickness th, CultureInfo cultureInfo) 
        {
            char listSeparator = TokenizerHelper.GetNumericListSeparator(cultureInfo); 

            // Initial capacity [64] is an estimate based on a sum of:
            // 48 = 4x double (twelve digits is generous for the range of values likely)
            //  8 = 4x Unit Type string (approx two characters) 
            //  4 = 4x separator characters
            StringBuilder sb = new StringBuilder(64); 
 
            sb.Append(LengthConverter.ToString(th.Left, cultureInfo));
            sb.Append(listSeparator); 
            sb.Append(LengthConverter.ToString(th.Top, cultureInfo));
            sb.Append(listSeparator);
            sb.Append(LengthConverter.ToString(th.Right, cultureInfo));
            sb.Append(listSeparator); 
            sb.Append(LengthConverter.ToString(th.Bottom, cultureInfo));
            return sb.ToString(); 
        } 

        static internal Thickness FromString(string s, CultureInfo cultureInfo) 
        {
            TokenizerHelper th = new TokenizerHelper(s, cultureInfo);
            double[] lengths = new double[4];
            int i = 0; 

            // Peel off each double in the delimited list. 
            while (th.NextToken()) 
            {
                if (i >= 4) 
                {
                    i = 5;    // Set i to a bad value.
                    break;
                } 

                lengths[i] = LengthConverter.FromString(th.GetCurrentToken(), cultureInfo); 
                i++; 
            }
 
            // We have a reasonable interpreation for one value (all four edges), two values (horizontal, vertical),
            // and four values (left, top, right, bottom).
            switch (i)
            { 
                case 1:
                    return new Thickness(lengths[0]); 
 
                case 2:
                    return new Thickness(lengths[0], lengths[1], lengths[0], lengths[1]); 

                case 4:
                    return new Thickness(lengths[0], lengths[1], lengths[2], lengths[3]);
            } 

            throw new FormatException(SR.Get(SRID.InvalidStringThickness, s)); 
        } 

    #endregion 

    }
}

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

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK