mcs/class/System.Drawing/System.Drawing/ImageFormatConverter.cs

   1 //
   2 // System.Drawing.ImageFormatConverter.cs
   3 //
   4 // Author:
   5 //   Dennis Hayes (dennish@Raytek.com)
   6 //   Sanjay Gupta (gsanjay@novell.com)
   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
  34 using System;
  35 using System.ComponentModel;
  36 using System.Globalization;
  37 using System.Drawing.Imaging;
  38 using System.ComponentModel.Design.Serialization;
  39 using System.Reflection;
  40
  41 namespace System.Drawing
  42 {
  43         /// <summary>
  44         /// Summary description for ImageFormatConverter.
  45         /// </summary>
  46         public class ImageFormatConverter : TypeConverter
  47         {
  48                 public ImageFormatConverter ()
  49                 {
  50                 }
  51
  52                 public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
  53                 {
  54                         if (sourceType == typeof (string))
  55                                 return true;
  56
  57                         return base.CanConvertFrom (context, sourceType);
  58                 }
  59
  60                 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
  61                 {
  62                         if (destinationType == typeof (string))
  63                                 return true;
  64
  65                         if (destinationType == typeof (InstanceDescriptor))
  66                                 return true;
  67
  68                         return base.CanConvertTo (context, destinationType);
  69                 }
  70
  71                 public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
  72                 {
  73                         // we must be able to convert from short names and long names
  74                         string strFormat = (value as string);
  75                         if (strFormat == null) {
  76                                 // case #1, this is not a string
  77                                 return base.ConvertFrom (context, culture, value);
  78                         } else if (strFormat [0] == '[') {
  79                                 // case #2, this is probably a long format (guid)
  80                                 if (strFormat.Equals (ImageFormat.Bmp.ToString ()))
  81                                         return ImageFormat.Bmp;
  82                                 else if (strFormat.Equals (ImageFormat.Emf.ToString ()))
  83                                         return ImageFormat.Emf;
  84                                 else if (strFormat.Equals (ImageFormat.Exif.ToString ()))
  85                                         return ImageFormat.Exif;
  86                                 else if (strFormat.Equals (ImageFormat.Gif.ToString ()))
  87                                         return ImageFormat.Gif;
  88                                 else if (strFormat.Equals (ImageFormat.Icon.ToString ()))
  89                                         return ImageFormat.Icon;
  90                                 else if (strFormat.Equals (ImageFormat.Jpeg.ToString ()))
  91                                         return ImageFormat.Jpeg;
  92                                 else if (strFormat.Equals (ImageFormat.MemoryBmp.ToString ()))
  93                                         return ImageFormat.MemoryBmp;
  94                                 else if (strFormat.Equals (ImageFormat.Png.ToString ()))
  95                                         return ImageFormat.Png;
  96                                 else if (strFormat.Equals (ImageFormat.Tiff.ToString ()))
  97                                         return ImageFormat.Tiff;
  98                                 else if (strFormat.Equals (ImageFormat.Wmf.ToString ()))
  99                                         return ImageFormat.Wmf;
 100                         } else {
 101                                 // case #3, this is probably a short format
 102                                 if (String.Compare (strFormat, "Bmp", true, CultureInfo.InvariantCulture) == 0)
 103                                         return ImageFormat.Bmp;
 104                                 else if (String.Compare (strFormat, "Emf", true, CultureInfo.InvariantCulture) == 0)
 105                                         return ImageFormat.Emf;
 106                                 else if (String.Compare (strFormat, "Exif", true, CultureInfo.InvariantCulture) == 0)
 107                                         return ImageFormat.Exif;
 108                                 else if (String.Compare (strFormat, "Gif", true, CultureInfo.InvariantCulture) == 0)
 109                                         return ImageFormat.Gif;
 110                                 else if (String.Compare (strFormat, "Icon", true, CultureInfo.InvariantCulture) == 0)
 111                                         return ImageFormat.Icon;
 112                                 else if (String.Compare (strFormat, "Jpeg", true, CultureInfo.InvariantCulture) == 0)
 113                                         return ImageFormat.Jpeg;
 114                                 else if (String.Compare (strFormat, "MemoryBmp", true, CultureInfo.InvariantCulture) == 0)
 115                                         return ImageFormat.MemoryBmp;
 116                                 else if (String.Compare (strFormat, "Png", true, CultureInfo.InvariantCulture) == 0)
 117                                         return ImageFormat.Png;
 118                                 else if (String.Compare (strFormat, "Tiff", true, CultureInfo.InvariantCulture) == 0)
 119                                         return ImageFormat.Tiff;
 120                                 else if (String.Compare (strFormat, "Wmf", true, CultureInfo.InvariantCulture) == 0)
 121                                         return ImageFormat.Wmf;
 122                         }
 123                         // last case, this is an unknown string
 124                         return base.ConvertFrom (context, culture, value);
 125                 }
 126
 127                 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType )
 128                 {
 129                         if (value is ImageFormat) {
 130                                 ImageFormat c = (ImageFormat) value;
 131                                 string prop = null;
 132                                 if (c.Guid.Equals (ImageFormat.Bmp.Guid))
 133                                         prop = "Bmp";
 134                                 else if (c.Guid.Equals (ImageFormat.Emf.Guid))
 135                                         prop = "Emf";
 136                                 else if (c.Guid.Equals (ImageFormat.Exif.Guid))
 137                                         prop = "Exif";
 138                                 else if (c.Guid.Equals (ImageFormat.Gif.Guid))
 139                                         prop = "Gif";
 140                                 else if (c.Guid.Equals (ImageFormat.Icon.Guid))
 141                                         prop = "Icon";
 142                                 else if (c.Guid.Equals (ImageFormat.Jpeg.Guid))
 143                                         prop = "Jpeg";
 144                                 else if (c.Guid.Equals (ImageFormat.MemoryBmp.Guid))
 145                                         prop = "MemoryBmp";
 146                                 else if (c.Guid.Equals (ImageFormat.Png.Guid))
 147                                         prop = "Png";
 148                                 else if (c.Guid.Equals (ImageFormat.Tiff.Guid))
 149                                         prop = "Tiff";
 150                                 else if (c.Guid.Equals (ImageFormat.Wmf.Guid))
 151                                         prop = "Wmf";
 152
 153                                 if (destinationType == typeof (string)) {
 154                                         return prop != null ? prop : c.ToString ();
 155                                 } else if (destinationType == typeof (InstanceDescriptor)) {
 156                                         if (prop != null){
 157                                                 return new InstanceDescriptor (typeof (ImageFormat).GetTypeInfo ().GetProperty (prop), null);
 158                                         } else {
 159                                                 ConstructorInfo ctor = typeof(ImageFormat).GetTypeInfo ().GetConstructor (new Type[] {typeof(Guid)} );
 160                                                 return new InstanceDescriptor (ctor, new object[] {c.Guid});
 161                                         }
 162                                 }
 163                         }
 164
 165                         return base.ConvertTo (context, culture, value, destinationType);
 166                 }
 167
 168                 public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
 169                 {
 170                         ImageFormat[] list = new ImageFormat [10];
 171                         list [0] = ImageFormat.MemoryBmp;
 172                         list [1] = ImageFormat.Bmp;
 173                         list [2] = ImageFormat.Emf;
 174                         list [3] = ImageFormat.Wmf;
 175                         list [4] = ImageFormat.Gif;
 176                         list [5] = ImageFormat.Jpeg;
 177                         list [6] = ImageFormat.Png;
 178                         list [7] = ImageFormat.Tiff;
 179                         list [8] = ImageFormat.Exif;
 180                         list [9] = ImageFormat.Icon;
 181                         return new TypeConverter.StandardValuesCollection (list);
 182                 }
 183
 184                 public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
 185                 {
 186                         return true;
 187                 }
 188         }
 189 }