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

   1 //
   2 // System.ComponentModel.Design.MenuCommand.cs
   3 //
   4 // Authors:
   5 //   Alejandro Sánchez Acosta  <raciel@es.gnu.org>
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) Alejandro Sánchez Acosta
   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.Collections;
  34 using System.Runtime.InteropServices;
  35
  36 namespace System.ComponentModel.Design
  37 {
  38         [ComVisible(true)]
  39         public class MenuCommand
  40         {
  41
  42                 private EventHandler handler;
  43                 private CommandID command;
  44                 private bool ischecked = false;
  45                 private bool enabled = true;
  46                 private bool issupported = true;
  47                 private bool visible = true;
  48                 private Hashtable properties;
  49
  50                 public MenuCommand (EventHandler handler, CommandID command)
  51                 {
  52                         this.handler = handler;
  53                         this.command = command;
  54                 }
  55
  56                 public virtual bool Checked {
  57                         get {
  58                                 return ischecked;
  59                         }
  60                         set {
  61                                 if (ischecked != value) {
  62                                         ischecked = value;
  63                                         OnCommandChanged (EventArgs.Empty);
  64                                 }
  65                         }
  66                 }
  67
  68                 public virtual CommandID CommandID {
  69                         get {
  70                                 return command;
  71                         }
  72                 }
  73
  74                 public virtual bool Enabled {
  75                         get {
  76                                 return enabled;
  77                         }
  78                         set {
  79                                 if (enabled != value)
  80                                 {
  81                                         enabled = value;
  82                                         OnCommandChanged (EventArgs.Empty);
  83                                 }
  84                         }
  85                 }
  86
  87                 [MonoTODO]
  88                 public virtual int OleStatus {
  89                         get {
  90                                 // This is calcualted from the other properties, but the docs to not tell how
  91                                 // Default seems to be "3", but changes with diffentent set properties
  92                                 return 3;
  93                         }
  94                 }
  95
  96                 public virtual IDictionary Properties {
  97                         get {
  98                                 if (properties == null)
  99                                         properties = new Hashtable ();
 100                                 return properties;
 101                         }
 102                 }
 103
 104                 public virtual bool Supported {
 105                         get {
 106                                 return issupported;
 107                         }
 108
 109                         set {
 110                                 issupported = value;
 111                         }
 112                 }
 113
 114                 public virtual bool Visible {
 115                         get {
 116                                 return visible;
 117                         }
 118
 119                         set {
 120                                 visible = value;
 121                         }
 122                 }
 123
 124                 public virtual void Invoke()
 125                 {
 126                         // FIXME Not sure if this invocation is what should be done here
 127                         if (handler != null)
 128                                 handler (this, EventArgs.Empty);
 129                 }
 130
 131                 public virtual void Invoke (object arg)
 132                 {
 133                         this.Invoke ();
 134                 }
 135
 136                 protected virtual void OnCommandChanged (EventArgs e)
 137                 {
 138                         if (CommandChanged != null)
 139                                 CommandChanged (this, e);
 140                 }
 141
 142                 public override string ToString()
 143                 {
 144                         // MS runtime produces a NullReferenceException here if CommandID property == null
 145                         // which I guess isn't a good idea (throwing exceptions in ToStrings???) - bug in MS??
 146                         string commandpart = string.Empty;
 147                         if (command != null)
 148                                 commandpart = command.ToString ();
 149                         commandpart = string.Concat (commandpart, " : ");
 150                         if (this.Supported)
 151                                 commandpart = string.Concat (commandpart, "Supported");
 152                         if (this.Enabled)
 153                                 commandpart = string.Concat (commandpart, "|Enabled");
 154                         if (this.Visible)
 155                                 commandpart = string.Concat (commandpart, "|Visible");
 156                         if (this.Checked)
 157                                 commandpart = string.Concat (commandpart, "|Checked");
 158                         return commandpart;
 159                 }
 160
 161                 public event EventHandler CommandChanged;
 162         }
 163 }