src/apps/mediaplayer/support/Command.h

   1 /*
   2  * Copyright 2006, Haiku.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Stephan Aßmus <superstippi@gmx.de>
   7  */
   8
   9 #ifndef COMMAND_H
  10 #define COMMAND_H
  11
  12 #include <SupportDefs.h>
  13 #include <String.h>
  14
  15 class BString;
  16
  17 class Command {
  18  public:
  19                                                                 Command();
  20         virtual                                         ~Command();
  21
  22         virtual status_t                        InitCheck();
  23
  24         virtual status_t                        Perform();
  25         virtual status_t                        Undo();
  26         virtual status_t                        Redo();
  27
  28         virtual void                            GetName(BString& name);
  29
  30         virtual bool                            UndoesPrevious(const Command* previous);
  31         virtual bool                            CombineWithNext(const Command* next);
  32         virtual bool                            CombineWithPrevious(const Command* previous);
  33
  34  protected:
  35                         const char*                     _GetString(uint32 key,
  36                                                                                    const char* defaultString) const;
  37
  38                         bigtime_t                       fTimeStamp;
  39 };
  40
  41 #endif // COMMAND_H