mcs/class/System.Drawing/System.Drawing/RectangleConverter.cs

   1 //
   2 // System.Drawing.RectangleConverter.cs
   3 //
   4 // Authors:
   5 //      Dennis Hayes (dennish@Raytek.com)
   6 //      Jordi Mas (jordi@ximian.com)
   7 //      Ravindra (rkumar@novell.com)
   8 //
   9 // Copyright (C) 2002 Ximian, Inc. http://www.ximian.com
  10 // Copyright (C) 2004 Novell, Inc. http://www.novell.com
  11 //
  12
  13 using System;
  14 using System.ComponentModel;
  15 using System.Collections;
  16 using System.Globalization;
  17 using System.Text;
  18
  19 namespace System.Drawing
  20 {
  21         /// <summary>
  22         /// Summary description for RectangleConverter.
  23         /// </summary>
  24         public class RectangleConverter : TypeConverter
  25         {
  26                 public RectangleConverter ()
  27                 {
  28                 }
  29
  30                 public override bool CanConvertFrom (ITypeDescriptorContext context,
  31                                                      Type sourceType)
  32                 {
  33                         if (sourceType == typeof (string))
  34                                 return true;
  35
  36                         return base.CanConvertFrom (context, sourceType);
  37                 }
  38
  39                 public override bool CanConvertTo (ITypeDescriptorContext context,
  40                                                    Type destinationType)
  41                 {
  42                         if (destinationType == typeof (string))
  43                                 return true;
  44
  45                         return base.CanConvertTo (context, destinationType);
  46                 }
  47
  48                 public override object ConvertFrom (ITypeDescriptorContext context,
  49                                                     CultureInfo culture,
  50                                                     object value)
  51                 {
  52                         string s = value as string;
  53                         if (s == null)
  54                                 return base.ConvertFrom (context, culture, value);
  55
  56                         string [] subs = s.Split (',');
  57                         if (subs.Length != 4)
  58                                 throw new ArgumentException ("Failed to parse Text(" + s + ") expected text in the format \"x,y,Width,Height.\"");
  59
  60                         int x = Int32.Parse (subs [0]);
  61                         int y = Int32.Parse (subs [1]);
  62                         int width = Int32.Parse (subs [2]);
  63                         int height = Int32.Parse (subs [3]);
  64
  65                         return new Rectangle (x, y, width, height);
  66                 }
  67
  68                 public override object ConvertTo (ITypeDescriptorContext context,
  69                                                   CultureInfo culture,
  70                                                   object value,
  71                                                   Type destinationType)
  72                 {
  73                         if ((destinationType == typeof (string)) && (value is Rectangle)) {
  74                                 Rectangle rect = (Rectangle) value;
  75                                 StringBuilder sb = new StringBuilder ();
  76                                 sb.Append (rect.X); sb.Append (", ");
  77                                 sb.Append (rect.Y); sb.Append (", ");
  78                                 sb.Append (rect.Width); sb.Append (", ");
  79                                 sb.Append (rect.Height);
  80                                 return sb.ToString ();
  81                         }
  82
  83                         return base.ConvertTo (context, culture, value, destinationType);
  84                 }
  85
  86                 public override object CreateInstance (ITypeDescriptorContext context,
  87                                                        IDictionary propertyValues)
  88                 {
  89                         int x = (int) propertyValues ["X"];
  90                         int y = (int) propertyValues ["Y"];
  91                         int width = (int) propertyValues ["Width"];
  92                         int height = (int) propertyValues ["Height"];
  93
  94                         return new Rectangle (x, y, width, height);
  95                 }
  96
  97                 public override bool GetCreateInstanceSupported (ITypeDescriptorContext context)
  98                 {
  99                         return true;
 100                 }
 101
 102                 [MonoTODO]
 103                 public override PropertyDescriptorCollection GetProperties (
 104                                                         ITypeDescriptorContext context,
 105                                                         object value, Attribute[] attributes)
 106                 {
 107                         throw new NotImplementedException ();
 108                 }
 109
 110                 public override bool GetPropertiesSupported (ITypeDescriptorContext context)
 111                 {
 112                         return true;
 113                 }
 114         }
 115 }