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