mcs/class/System.Drawing.Design/System.Drawing.Design/ImageEditor.cs

   1 //
   2 // System.Drawing.Design.ImageEditor.cs
   3 //
   4 // Authors:
   5 //   Martin Willemoes Hansen (mwh@sysrq.dk)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) 2003 Martin Willemoes Hansen
   9 // (C) 2003 Andreas Nahr
  10 // Copyright (C) 2007 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Text;
  33 using System.IO;
  34 using System.ComponentModel;
  35 using System.Windows.Forms;
  36
  37 namespace System.Drawing.Design
  38 {
  39         public class ImageEditor : UITypeEditor
  40         {
  41
  42                 private OpenFileDialog openDialog;
  43
  44                 public ImageEditor()
  45                 {
  46                 }
  47
  48                 public override object EditValue (ITypeDescriptorContext context,
  49                         IServiceProvider provider, object value)
  50                 {
  51                         openDialog = new OpenFileDialog();
  52                         openDialog.Title = Locale.GetText ("Open image file");
  53                         openDialog.CheckFileExists = true;
  54                         openDialog.CheckPathExists = true;
  55                         openDialog.Filter = CreateFilterEntry (this);
  56                         openDialog.Multiselect = false;
  57
  58                         // Show the dialog
  59                         DialogResult result = openDialog.ShowDialog();
  60
  61                         // Check the result and create a new image from the file
  62                         if (result == DialogResult.OK) {
  63                                 return LoadFromStream (openDialog.OpenFile());
  64                         }
  65                         else
  66                                 return value;
  67                 }
  68
  69                 public override UITypeEditorEditStyle GetEditStyle (ITypeDescriptorContext context)
  70                 {
  71                         return UITypeEditorEditStyle.Modal;
  72                 }
  73
  74                 public override bool GetPaintValueSupported (ITypeDescriptorContext context)
  75                 {
  76                         return true;
  77                 }
  78
  79                 public override void PaintValue (PaintValueEventArgs e)
  80                 {
  81                         Graphics G = e.Graphics;
  82
  83                         if (e.Value != null) {
  84                                 Image I = (Image) e.Value;
  85                                 G.DrawImage (I, e.Bounds);
  86                         }
  87
  88                         G.DrawRectangle (Pens.Black, e.Bounds);
  89                 }
  90
  91                 protected static string CreateExtensionsString (string[] extensions, string sep)
  92                 {
  93                         if (extensions.Length > 0) {
  94                                 StringBuilder sb = new StringBuilder();
  95
  96                                 sb.Append (extensions[0]);
  97                                 for (int x = 1; x < extensions.Length - 1; x++) {
  98                                         sb.Append (sep);
  99                                         sb.Append (extensions[x]);
 100                                 }
 101                                 return sb.ToString();
 102                         }
 103                         else {
 104                                 return string.Empty;
 105                         }
 106                 }
 107
 108                 protected static string CreateFilterEntry (ImageEditor e)
 109                 {
 110                         StringBuilder sb = new StringBuilder();
 111                         string ExtStr = CreateExtensionsString (e.GetExtensions(), ";");
 112
 113                         sb.Append (e.GetFileDialogDescription());
 114                         sb.Append (" (" + ExtStr + ")" + "|");
 115                         sb.Append (ExtStr);
 116                         return sb.ToString();
 117                 }
 118
 119                 protected virtual string[] GetExtensions()
 120                 {
 121                         return new string[] {"*.bmp", "*.gif", "*.jpg", "*.jpeg", "*.png", "*.ico", "*.emf", "*.wmf"};
 122                 }
 123
 124                 protected virtual string GetFileDialogDescription()
 125                 {
 126                         return Locale.GetText ("All image files");
 127                 }
 128
 129                 protected virtual Image LoadFromStream (Stream stream)
 130                 {
 131                         return new Bitmap (stream);
 132                 }
 133                 [MonoTODO]
 134                 protected virtual Type[] GetImageExtenders ()
 135                 {
 136                         throw new NotImplementedException ();
 137                 }
 138         }
 139 }