mcs/class/System.Drawing/System.Drawing.Printing/MarginsConverter.cs

   1 //
   2 // System.Drawing.MarginsConverter.cs
   3 //
   4 // Author:
   5 //   Dennis Hayes (dennish@Raytek.com)
   6 //   Herve Poussineau (hpoussineau@fr.st)
   7 //
   8 // (C) 2002 Ximian, Inc
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33 using System;
  34 using System.ComponentModel;
  35 using System.Globalization;
  36 using System.Text.RegularExpressions;
  37
  38 namespace System.Drawing.Printing {
  39         /// <summary>
  40         /// Summary description for MarginsConverter.
  41         /// </summary>
  42         public class MarginsConverter : ExpandableObjectConverter {
  43                 public MarginsConverter() {
  44                 }
  45                 #region Methods
  46                 public override bool CanConvertFrom(ITypeDescriptorContext context,Type sourceType) {
  47                         if (sourceType == typeof(string))
  48                                 return true;
  49
  50                         return base.CanConvertFrom(context, sourceType);
  51                 }
  52
  53                 public override bool CanConvertTo(ITypeDescriptorContext context,Type destinationType) {
  54                         if (destinationType == typeof(string))
  55                                 return true;
  56
  57                         return base.CanConvertTo(context, destinationType);
  58                 }
  59
  60                 public override object ConvertFrom(ITypeDescriptorContext context,CultureInfo culture,object value) {
  61                         if (value is string)
  62                         {
  63                                 if (value == null)
  64                                         return new Margins();
  65
  66                                 // format [left];[right];[top];[bottom]
  67                                 string separator = @"( |\t)*";
  68                                 separator = separator + ";" + separator;
  69                                 string regex = @"(?<left>\d+)" + separator + @"(?<right>\d+)" + separator + @"(?<top>\d+)" + separator + @"(?<bottom>\d+)";
  70
  71                                 Match match = new Regex(regex).Match(value as string);
  72                                 if (!match.Success)
  73                                         throw new ArgumentException("value");
  74
  75                                 int left, right, top, bottom;
  76                                 try
  77                                 {
  78                                         left = int.Parse(match.Groups["left"].Value);
  79                                         right = int.Parse(match.Groups["right"].Value);
  80                                         top = int.Parse(match.Groups["top"].Value);
  81                                         bottom = int.Parse(match.Groups["bottom"].Value);
  82                                 }
  83                                 catch (Exception e)
  84                                 {
  85                                         throw new ArgumentException("value", e);
  86                                 }
  87                                 return new Margins(left, right, top, bottom);
  88                         } else
  89                                 return base.ConvertFrom(context, culture, value);
  90                 }
  91
  92                 public override object ConvertTo(ITypeDescriptorContext context,CultureInfo culture,object value,Type destinationType) {
  93                         if (destinationType == typeof(string) && value is Margins)
  94                         {
  95                                 Margins source = value as Margins;
  96                                 string ret = "{0}; {1}; {2}; {3}";
  97                                 return String.Format(ret, source.Left, source.Right, source.Top, source.Bottom);
  98                         } else
  99                                 return base.ConvertTo(context, culture, value, destinationType);
 100                 }
 101
 102                 public override bool GetCreateInstanceSupported(ITypeDescriptorContext context)
 103                 {
 104                         return true;
 105                 }
 106
 107                 public override object CreateInstance(ITypeDescriptorContext context, System.Collections.IDictionary propertyValues)
 108                 {
 109                         try
 110                         {
 111                                 Margins margins = new Margins();
 112                                 margins.Left = int.Parse(propertyValues["Left"].ToString());
 113                                 margins.Right = int.Parse(propertyValues["Right"].ToString());
 114                                 margins.Top = int.Parse(propertyValues["Top"].ToString());
 115                                 margins.Bottom = int.Parse(propertyValues["Bottom"].ToString());
 116                                 return margins;
 117                         }
 118                         catch (Exception)
 119                         {
 120                                 // in case of error, return null
 121                                 return null;
 122                         }
 123                 }
 124                 #endregion
 125         }
 126 }