docs/latex/wx/cmdproc.tex

   1 \section{\class{wxCommandProcessor}}\label{wxcommandprocessor}
   2
   3 wxCommandProcessor is a class that maintains a history of wxCommands,
   4 with undo/redo functionality built-in. Derive a new class from this
   5 if you want different behaviour.
   6
   7 \wxheading{Derived from}
   8
   9 \helpref{wxObject}{wxobject}
  10
  11 \wxheading{Include files}
  12
  13 <wx/docview.h>
  14
  15 \wxheading{See also}
  16
  17 \helpref{wxCommandProcessor overview}{wxcommandprocessoroverview}, \helpref{wxCommand}{wxcommand}
  18
  19 \latexignore{\rtfignore{\wxheading{Members}}}
  20
  21 \membersection{wxCommandProcessor::wxCommandProcessor}
  22
  23 \func{}{wxCommandProcessor}{\param{int}{ maxCommands = 100}}
  24
  25 Constructor.
  26
  27 {\it maxCommands} defaults to a rather arbitrary 100, but can be set from 1 to any integer.
  28 If your wxCommand classes store a lot of data, you may wish the limit the number of
  29 commands stored to a smaller number.
  30
  31 \membersection{wxCommandProcessor::\destruct{wxCommandProcessor}}
  32
  33 \func{}{\destruct{wxCommandProcessor}}{\void}
  34
  35 Destructor.
  36
  37 \membersection{wxCommandProcessor::CanUndo}
  38
  39 \func{virtual bool}{CanUndo}{\void}
  40
  41 Returns TRUE if the currently-active command can be undone, FALSE otherwise.
  42
  43 \membersection{wxCommandProcessor::ClearCommands}
  44
  45 \func{virtual void}{ClearCommands}{\void}
  46
  47 Deletes all the commands in the list and sets the current command pointer to NULL.
  48
  49 \membersection{wxCommandProcessor::Do}
  50
  51 \func{virtual bool}{Do}{\void}
  52
  53 Executes (redoes) the current command (the command that has just been undone if any).
  54
  55 \membersection{wxCommandProcessor::GetCommands}
  56
  57 \constfunc{wxList\&}{GetCommands}{\void}
  58
  59 Returns the list of commands.
  60
  61 \membersection{wxCommandProcessor::GetMaxCommands}
  62
  63 \constfunc{int}{GetMaxCommands}{\void}
  64
  65 Returns the maximum number of commands that the command processor stores.
  66
  67 \membersection{wxCommandProcessor::GetEditMenu}
  68
  69 \constfunc{wxMenu*}{GetEditMenu}{\void}
  70
  71 Returns the edit menu associated with the command processor.
  72
  73 \membersection{wxCommandProcessor::GetRedoAccelerator}\label{wxcommandprocessorgetredoaccelerator}
  74
  75 \constfunc{const wxString\&}{GetRedoAccelerator}{\void}
  76
  77 Returns the string that will be appended to the Redo menu item.
  78
  79 \membersection{wxCommandProcessor::GetUndoAccelerator}\label{wxcommandprocessorgetundoaccelerator}
  80
  81 \constfunc{const wxString\&}{GetUndoAccelerator}{\void}
  82
  83 Returns the string that will be appended to the Undo menu item.
  84
  85 \membersection{wxCommandProcessor::Initialize}
  86
  87 \func{virtual void}{Initialize}{\void}
  88
  89 Initializes the command processor, setting the current command to the
  90 last in the list (if any), and updating the edit menu (if one has been
  91 specified).
  92
  93 \membersection{wxCommandProcessor::SetEditMenu}
  94
  95 \func{void}{SetEditMenu}{\param{wxMenu* }{menu}}
  96
  97 Tells the command processor to update the Undo and Redo items on this
  98 menu as appropriate. Set this to NULL if the menu is about to be
  99 destroyed and command operations may still be performed, or the command
 100 processor may try to access an invalid pointer.
 101
 102 \membersection{wxCommandProcessor::SetRedoAccelerator}\label{wxcommandprocessorsetredoaccelerator}
 103
 104 \func{void}{SetRedoAccelerator}{\param{const wxString\&}{accel}}
 105
 106 Sets the string that will be appended to the Redo menu item.
 107
 108 \membersection{wxCommandProcessor::SetUndoAccelerator}\label{wxcommandprocessorsetundoaccelerator}
 109
 110 \func{void}{SetUndoAccelerator}{\param{const wxString\&}{accel}}
 111
 112 Sets the string that will be appended to the Undo menu item.
 113
 114 \membersection{wxCommandProcessor::Submit}
 115
 116 \func{virtual bool}{Submit}{\param{wxCommand *}{command}, \param{bool}{ storeIt = TRUE}}
 117
 118 Submits a new command to the command processor. The command processor
 119 calls wxCommand::Do to execute the command; if it succeeds, the command
 120 is stored in the history list, and the associated edit menu (if any) updated
 121 appropriately. If it fails, the command is deleted
 122 immediately. Once Submit has been called, the passed command should not
 123 be deleted directly by the application.
 124
 125 {\it storeIt} indicates whether the successful command should be stored
 126 in the history list.
 127
 128 \membersection{wxCommandProcessor::Undo}
 129
 130 \func{virtual bool}{Undo}{\void}
 131
 132 Undoes the command just executed.
 133
 134