mcs/class/System.Design/System.ComponentModel.Design/DesignerEventService.cs

   1 //
   2 // System.ComponentModel.Design.DesignerEventService
   3 //
   4 // Authors:
   5 //        Ivan N. Zlatev (contact i-nZ.net)
   6 //
   7 // (C) 2006-2007 Ivan N. Zlatev
   8
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30
  31 using System;
  32 using System.ComponentModel;
  33 using System.Collections;
  34
  35 namespace System.ComponentModel.Design
  36 {
  37         // IDesignerEventService provides a global eventing mechanism for designer events. With this mechanism,
  38         // an application is informed when a designer becomes active. The service provides a collection of
  39         // designers and a single place where global objects, such as the Properties window, can monitor selection
  40         // change events.
  41         //
  42         // IDesignerEventService is practicly replaced by the DesignSurfaceManager and also the
  43         // meaning of Designer in IDesignerEventService is actually DesignerHost.
  44         //
  45         internal sealed class DesignerEventService : IDesignerEventService
  46         {
  47
  48                 public DesignerEventService ()
  49                 {
  50                         _designerList = new ArrayList ();
  51                 }
  52
  53                 private ArrayList _designerList;
  54                 private IDesignerHost _activeDesigner;
  55
  56                 public IDesignerHost ActiveDesigner {
  57                         get {
  58                                 return _activeDesigner;
  59                         }
  60                         internal set {
  61                                 IDesignerHost old = _activeDesigner;
  62                                 _activeDesigner = value;
  63                                 if (ActiveDesignerChanged != null)
  64                                         ActiveDesignerChanged (this, new ActiveDesignerEventArgs (old, value));
  65                         }
  66                 }
  67
  68                 public DesignerCollection Designers {
  69                         get { return new DesignerCollection (_designerList); }
  70                 }
  71
  72                 public event ActiveDesignerEventHandler ActiveDesignerChanged;
  73                 public event DesignerEventHandler DesignerCreated;
  74                 public event DesignerEventHandler DesignerDisposed;
  75                 public event EventHandler SelectionChanged;
  76
  77                 public void RaiseDesignerCreated (IDesignerHost host)
  78                 {
  79                         if (DesignerCreated != null)
  80                                 DesignerCreated (this, new DesignerEventArgs (host));
  81                 }
  82
  83                 public void RaiseDesignerDisposed (IDesignerHost host)
  84                 {
  85                         if (DesignerDisposed != null)
  86                                 DesignerDisposed (this, new DesignerEventArgs (host));
  87                 }
  88
  89                 public void RaiseSelectionChanged ()
  90                 {
  91                         if (SelectionChanged != null)
  92                                 SelectionChanged (this, EventArgs.Empty);
  93                 }
  94
  95         }
  96 }