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/cmdproc.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 = $-1$}}
  24
  25 Constructor.
  26
  27 {\it maxCommands} may be set to a positive integer to limit the number of
  28 commands stored to it, otherwise (and by default) the list of commands can grow
  29 arbitrarily.
  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::Redo}
  50
  51 \func{virtual bool}{Redo}{\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::GetRedoMenuLabel}\label{wxcommandprocessorgetredomenulabel}
  80
  81 \constfunc{wxString}{GetRedoMenuLabel}{\void}
  82
  83 Returns the string that will be shown for the redo menu item.
  84
  85 \membersection{wxCommandProcessor::GetUndoAccelerator}\label{wxcommandprocessorgetundoaccelerator}
  86
  87 \constfunc{const wxString\&}{GetUndoAccelerator}{\void}
  88
  89 Returns the string that will be appended to the Undo menu item.
  90
  91 \membersection{wxCommandProcessor::GetUndoMenuLabel}\label{wxcommandprocessorgetundomenulabel}
  92
  93 \constfunc{wxString}{GetUndoMenuLabel}{\void}
  94
  95 Returns the string that will be shown for the undo menu item.
  96
  97 \membersection{wxCommandProcessor::Initialize}
  98
  99 \func{virtual void}{Initialize}{\void}
 100
 101 Initializes the command processor, setting the current command to the
 102 last in the list (if any), and updating the edit menu (if one has been
 103 specified).
 104
 105 \membersection{wxCommandProcessor::SetEditMenu}
 106
 107 \func{void}{SetEditMenu}{\param{wxMenu* }{menu}}
 108
 109 Tells the command processor to update the Undo and Redo items on this
 110 menu as appropriate. Set this to NULL if the menu is about to be
 111 destroyed and command operations may still be performed, or the command
 112 processor may try to access an invalid pointer.
 113
 114 \membersection{wxCommandProcessor::SetMenuStrings}
 115
 116 \func{void}{SetMenuStrings}{\void}
 117
 118 Sets the menu labels according to the currently set menu and the current
 119 command state.
 120
 121 \membersection{wxCommandProcessor::SetRedoAccelerator}\label{wxcommandprocessorsetredoaccelerator}
 122
 123 \func{void}{SetRedoAccelerator}{\param{const wxString\&}{accel}}
 124
 125 Sets the string that will be appended to the Redo menu item.
 126
 127 \membersection{wxCommandProcessor::SetUndoAccelerator}\label{wxcommandprocessorsetundoaccelerator}
 128
 129 \func{void}{SetUndoAccelerator}{\param{const wxString\&}{accel}}
 130
 131 Sets the string that will be appended to the Undo menu item.
 132
 133 \membersection{wxCommandProcessor::Submit}
 134
 135 \func{virtual bool}{Submit}{\param{wxCommand *}{command}, \param{bool}{ storeIt = true}}
 136
 137 Submits a new command to the command processor. The command processor
 138 calls wxCommand::Do to execute the command; if it succeeds, the command
 139 is stored in the history list, and the associated edit menu (if any) updated
 140 appropriately. If it fails, the command is deleted
 141 immediately. Once Submit has been called, the passed command should not
 142 be deleted directly by the application.
 143
 144 {\it storeIt} indicates whether the successful command should be stored
 145 in the history list.
 146
 147 \membersection{wxCommandProcessor::Undo}
 148
 149 \func{virtual bool}{Undo}{\void}
 150
 151 Undoes the command just executed.
 152
 153