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

   1 //
   2 // System.Drawing.Design.CursorEditor.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 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Drawing;
  35 using System.ComponentModel;
  36 using System.Windows.Forms;
  37 using System.Windows.Forms.Design;
  38
  39 namespace System.Drawing.Design
  40 {
  41         public class CursorEditor : UITypeEditor
  42         {
  43
  44                 public CursorEditor()
  45                 {
  46                 }
  47
  48                 // TODO: Enhance (MS.Net has a version with graphical cursor preview)
  49                 private class CursorUI : ListBox
  50                 {
  51                         private object value;
  52                         private IWindowsFormsEditorService service;
  53
  54                         public CursorUI (UITypeEditor host, IWindowsFormsEditorService service, object value)
  55                         {
  56                                 this.service = service;
  57                                 this.value = value;
  58                                 TypeConverter conv = TypeDescriptor.GetConverter (typeof (Cursor));
  59                                 foreach (object o in conv.GetStandardValues())
  60                                         base.Items.Add (o);
  61                         }
  62
  63                         protected override void OnClick (EventArgs e)
  64                         {
  65                                 base.OnClick (e);
  66                                 value = base.SelectedItem;
  67                                 service.CloseDropDown();
  68                         }
  69
  70                         public object Value {
  71                                 get { return value; }
  72                         }
  73                 }
  74
  75                 public override object EditValue (ITypeDescriptorContext context,
  76                         IServiceProvider provider, object value)
  77                 {
  78                         if (provider == null)
  79                                 return value;
  80
  81                         IWindowsFormsEditorService service =
  82                                 (IWindowsFormsEditorService)provider.GetService (typeof (IWindowsFormsEditorService));
  83
  84                         if (service == null)
  85                                 return value;
  86
  87                         CursorUI ui = new CursorUI (this, service, value);
  88                         service.DropDownControl (ui);
  89
  90                         return ui.Value;
  91                 }
  92
  93                 public override UITypeEditorEditStyle GetEditStyle (ITypeDescriptorContext context)
  94                 {
  95                         return UITypeEditorEditStyle.DropDown;
  96                 }
  97         }
  98 }