class/System.Drawing/System.Drawing/ToolboxBitmapAttribute.cs

   1 //
   2 // System.Drawing.ToolboxBitmapAttribute.cs
   3 //
   4 // Authors:
   5 //   Dennis Hayes (dennish@Raytek.com)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // Copyright (C) 2002 Ximian, Inc. http://www.ximian.com
   9 // Copyright (C) 2004 Novell, Inc. http://www.novell.com
  10 //
  11
  12 //
  13 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System;
  36
  37 namespace System.Drawing
  38 {
  39         [AttributeUsage (AttributeTargets.Class)]
  40         public class ToolboxBitmapAttribute : Attribute
  41         {
  42                 private Image smallImage = null;
  43                 private Image bigImage = null;
  44                 public static readonly ToolboxBitmapAttribute Default = new ToolboxBitmapAttribute();
  45
  46                 private ToolboxBitmapAttribute ()
  47                 {
  48                 }
  49
  50                 public ToolboxBitmapAttribute (string imageFile)
  51                 {
  52                 }
  53
  54                 public ToolboxBitmapAttribute (Type t)
  55                 {
  56                         smallImage = GetImageFromResource (t, null, false);
  57                 }
  58
  59                 public ToolboxBitmapAttribute (Type t, string name)
  60                 {
  61                         smallImage = GetImageFromResource (t, name, false);
  62                 }
  63
  64                 public override bool Equals (object value)
  65                 {
  66                         if (!(value is ToolboxBitmapAttribute))
  67                                 return false;
  68                         if (value == this)
  69                                 return true;
  70                         return ((ToolboxBitmapAttribute) value).smallImage == this.smallImage;
  71                 }
  72
  73                 public override int GetHashCode ()
  74                 {
  75                         return (smallImage.GetHashCode () ^ bigImage.GetHashCode ());
  76                 }
  77
  78                 public Image GetImage (object component)
  79                 {
  80                         return GetImage (component.GetType(), null, false);
  81                 }
  82
  83                 public Image GetImage (object component, bool large)
  84                 {
  85                         return GetImage (component.GetType(), null, large);
  86                 }
  87
  88                 public Image GetImage (Type type)
  89                 {
  90                         return GetImage (type, null, false);
  91                 }
  92
  93                 public Image GetImage (Type type, bool large)
  94                 {
  95                         return GetImage (type, null, large);
  96                 }
  97
  98                 public Image GetImage (Type type, string imgName, bool large)
  99                 {
 100                         if (smallImage == null)
 101                                         smallImage = GetImageFromResource (type, imgName, false);
 102
 103                         if (large) {
 104                                 if (bigImage == null)
 105                                         bigImage = new Bitmap (smallImage, 32, 32);
 106                                 return bigImage;
 107                         }
 108                         else
 109                                 return smallImage;
 110                 }
 111
 112                 public static Image GetImageFromResource (Type t, string imageName, bool large)
 113                 {
 114                         Bitmap bitmap;
 115                         if (imageName == null)
 116                                 imageName = t.Name + ".bmp";
 117
 118                         try {
 119                                 using (System.IO.Stream s = t.Assembly.GetManifestResourceStream (t.Namespace + "." + imageName)){
 120                                         if (s == null) {
 121                                                 return null;
 122                                         } else {
 123                                                 bitmap = new Bitmap (s, false);
 124                                         }
 125                                 }
 126
 127                                 //FIXME: thrown too easily
 128                                 //if (bitmap.Width != 16 || bitmap.Height != 16)
 129                                 //      throw new Exception ("ToolboxBitmap must be 16x16 pixels");
 130
 131                                 if (large)
 132                                         return new Bitmap (bitmap, 32, 32);
 133                                 return bitmap;
 134                         } catch {
 135                                 return null;
 136                         }
 137                 }
 138         }
 139 }