\section{\class{wxCommandProcessor}}\label{wxcommandprocessor} wxCommandProcessor is a class that maintains a history of wxCommands, with undo/redo functionality built-in. Derive a new class from this if you want different behaviour. \wxheading{Derived from} \helpref{wxObject}{wxobject} \wxheading{Include files} \wxheading{See also} \helpref{wxCommandProcessor overview}{wxcommandprocessoroverview}, \helpref{wxCommand}{wxcommand} \latexignore{\rtfignore{\wxheading{Members}}} \membersection{wxCommandProcessor::wxCommandProcessor} \func{}{wxCommandProcessor}{\param{int}{ maxCommands = $-1$}} Constructor. {\it maxCommands} may be set to a positive integer to limit the number of commands stored to it, otherwise (and by default) the list of commands can grow arbitrarily. \membersection{wxCommandProcessor::\destruct{wxCommandProcessor}} \func{}{\destruct{wxCommandProcessor}}{\void} Destructor. \membersection{wxCommandProcessor::CanUndo} \func{virtual bool}{CanUndo}{\void} Returns TRUE if the currently-active command can be undone, FALSE otherwise. \membersection{wxCommandProcessor::ClearCommands} \func{virtual void}{ClearCommands}{\void} Deletes all the commands in the list and sets the current command pointer to NULL. \membersection{wxCommandProcessor::Redo} \func{virtual bool}{Redo}{\void} Executes (redoes) the current command (the command that has just been undone if any). \membersection{wxCommandProcessor::GetCommands} \constfunc{wxList\&}{GetCommands}{\void} Returns the list of commands. \membersection{wxCommandProcessor::GetMaxCommands} \constfunc{int}{GetMaxCommands}{\void} Returns the maximum number of commands that the command processor stores. \membersection{wxCommandProcessor::GetEditMenu} \constfunc{wxMenu*}{GetEditMenu}{\void} Returns the edit menu associated with the command processor. \membersection{wxCommandProcessor::GetRedoAccelerator}\label{wxcommandprocessorgetredoaccelerator} \constfunc{const wxString\&}{GetRedoAccelerator}{\void} Returns the string that will be appended to the Redo menu item. \membersection{wxCommandProcessor::GetRedoMenuLabel}\label{wxcommandprocessorgetredomenulabel} \constfunc{wxString}{GetRedoMenuLabel}{\void} Returns the string that will be shown for the redo menu item. \membersection{wxCommandProcessor::GetUndoAccelerator}\label{wxcommandprocessorgetundoaccelerator} \constfunc{const wxString\&}{GetUndoAccelerator}{\void} Returns the string that will be appended to the Undo menu item. \membersection{wxCommandProcessor::GetUndoMenuLabel}\label{wxcommandprocessorgetundomenulabel} \constfunc{wxString}{GetUndoMenuLabel}{\void} Returns the string that will be shown for the undo menu item. \membersection{wxCommandProcessor::Initialize} \func{virtual void}{Initialize}{\void} Initializes the command processor, setting the current command to the last in the list (if any), and updating the edit menu (if one has been specified). \membersection{wxCommandProcessor::SetEditMenu} \func{void}{SetEditMenu}{\param{wxMenu* }{menu}} Tells the command processor to update the Undo and Redo items on this menu as appropriate. Set this to NULL if the menu is about to be destroyed and command operations may still be performed, or the command processor may try to access an invalid pointer. \membersection{wxCommandProcessor::SetMenuStrings} \func{void}{SetMenuStrings}{\void} Sets the menu labels according to the currently set menu and the current command state. \membersection{wxCommandProcessor::SetRedoAccelerator}\label{wxcommandprocessorsetredoaccelerator} \func{void}{SetRedoAccelerator}{\param{const wxString\&}{accel}} Sets the string that will be appended to the Redo menu item. \membersection{wxCommandProcessor::SetUndoAccelerator}\label{wxcommandprocessorsetundoaccelerator} \func{void}{SetUndoAccelerator}{\param{const wxString\&}{accel}} Sets the string that will be appended to the Undo menu item. \membersection{wxCommandProcessor::Submit} \func{virtual bool}{Submit}{\param{wxCommand *}{command}, \param{bool}{ storeIt = TRUE}} Submits a new command to the command processor. The command processor calls wxCommand::Do to execute the command; if it succeeds, the command is stored in the history list, and the associated edit menu (if any) updated appropriately. If it fails, the command is deleted immediately. Once Submit has been called, the passed command should not be deleted directly by the application. {\it storeIt} indicates whether the successful command should be stored in the history list. \membersection{wxCommandProcessor::Undo} \func{virtual bool}{Undo}{\void} Undoes the command just executed.