ToolboxBitmapAttribute.cs :  » 2.6.4-mono-.net-core » System.Drawing » System » Drawing » C# / CSharp Open Source

//
// System.Drawing.ToolboxBitmapAttribute.cs
//
// Authors:
//   Dennis Hayes (dennish@Raytek.com)
//   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//
// Copyright (C) 2002 Ximian, Inc. http://www.ximian.com
// Copyright (C) 2004 Novell, Inc. http://www.novell.com
//

//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;

namespace System.Drawing{
  [AttributeUsage (AttributeTargets.Class)]
  public class ToolboxBitmapAttribute : Attribute
  {
    private Image smallImage = null;
    private Image bigImage = null;
    public static readonly ToolboxBitmapAttribute Default = new ToolboxBitmapAttribute();

    private ToolboxBitmapAttribute ()
    {
    }

    public ToolboxBitmapAttribute (string imageFile)
    {
    }
    
    public ToolboxBitmapAttribute (Type t)
    {
      smallImage = GetImageFromResource (t, null, false);
    }
    
    public ToolboxBitmapAttribute (Type t, string name)
    {
      smallImage = GetImageFromResource (t, name, false);
    }

    public override bool Equals (object value)
    {
      if (!(value is ToolboxBitmapAttribute))
        return false;
      if (value == this)
        return true;
      return ((ToolboxBitmapAttribute) value).smallImage == this.smallImage;
    }

    public override int GetHashCode ()
    {
      return (smallImage.GetHashCode () ^ bigImage.GetHashCode ());
    }

    public Image GetImage (object component)
    {
      return GetImage (component.GetType(), null, false);
    }

    public Image GetImage (object component, bool large)
    {
      return GetImage (component.GetType(), null, large);
    }

    public Image GetImage (Type type)
    {
      return GetImage (type, null, false);
    }

    public Image GetImage (Type type, bool large)
    {
      return GetImage (type, null, large);
    }

    public Image GetImage (Type type, string imgName, bool large)
    {
      if (smallImage == null)
          smallImage = GetImageFromResource (type, imgName, false);
      
      if (large) {
        if (bigImage == null)
          bigImage = new Bitmap (smallImage, 32, 32);
        return bigImage;
      }
      else
        return smallImage;
    }

    public static Image GetImageFromResource (Type t, string imageName, bool large)
    {
      Bitmap bitmap;
      if (imageName == null)
        imageName = t.Name + ".bmp";

      try {
        using (System.IO.Stream s = t.Assembly.GetManifestResourceStream (t.Namespace + "." + imageName)){
          if (s == null) {
            return null;
          } else {
            bitmap = new Bitmap (s, false);
          }
        }
        
        //FIXME: thrown too easily
        //if (bitmap.Width != 16 || bitmap.Height != 16)
        //  throw new Exception ("ToolboxBitmap must be 16x16 pixels");
        
        if (large)
          return new Bitmap (bitmap, 32, 32);
        return bitmap;
      } catch {
        return null;
      }
    }
  }
}