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 // 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.ComponentModel;
  33 using System.Windows.Forms;
  34 using System.Windows.Forms.Design;
  35
  36 namespace System.Drawing.Design
  37 {
  38         public class CursorEditor : UITypeEditor
  39         {
  40
  41                 public CursorEditor()
  42                 {
  43                 }
  44
  45                 // TODO: Enhance (MS.Net has a version with graphical cursor preview)
  46                 private class CursorUI : ListBox
  47                 {
  48                         private object value;
  49                         private IWindowsFormsEditorService service;
  50
  51                         public CursorUI (UITypeEditor host, IWindowsFormsEditorService service, object value)
  52                         {
  53                                 this.service = service;
  54                                 this.value = value;
  55                                 TypeConverter conv = TypeDescriptor.GetConverter (typeof (Cursor));
  56                                 foreach (object o in conv.GetStandardValues())
  57                                         base.Items.Add (o);
  58                         }
  59
  60                         protected override void OnClick (EventArgs e)
  61                         {
  62                                 base.OnClick (e);
  63                                 value = base.SelectedItem;
  64                                 service.CloseDropDown();
  65                         }
  66
  67                         public object Value {
  68                                 get { return value; }
  69                         }
  70                 }
  71
  72                 public override object EditValue (ITypeDescriptorContext context,
  73                         IServiceProvider provider, object value)
  74                 {
  75                         if (provider == null)
  76                                 return value;
  77
  78                         IWindowsFormsEditorService service =
  79                                 (IWindowsFormsEditorService)provider.GetService (typeof (IWindowsFormsEditorService));
  80
  81                         if (service == null)
  82                                 return value;
  83
  84                         CursorUI ui = new CursorUI (this, service, value);
  85                         service.DropDownControl (ui);
  86
  87                         return ui.Value;
  88                 }
  89
  90                 public override UITypeEditorEditStyle GetEditStyle (ITypeDescriptorContext context)
  91                 {
  92                         return UITypeEditorEditStyle.DropDown;
  93                 }
  94                 public override bool IsDropDownResizable {
  95                         get { return true; }
  96                 }
  97         }
  98 }