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.
wxCommandProcessor overview, wxCommand
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.
Returns true if the currently-active command can be undone, false otherwise.
Deletes all the commands in the list and sets the current command pointer to NULL.
Executes (redoes) the current command (the command that has just been undone if any).
wxList& GetCommands(void) const
Returns the list of commands.
int GetMaxCommands(void) const
Returns the maximum number of commands that the command processor stores.
wxMenu* GetEditMenu(void) const
Returns the edit menu associated with the command processor.
const wxString& GetRedoAccelerator(void) const
Returns the string that will be appended to the Redo menu item.
wxString GetRedoMenuLabel(void) const
Returns the string that will be shown for the redo menu item.
const wxString& GetUndoAccelerator(void) const
Returns the string that will be appended to the Undo menu item.
wxString GetUndoMenuLabel(void) const
Returns the string that will be shown for the undo menu item.
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).
Returns a boolean value that indicates if changes have been made since the last save operation. This only works if wxCommandProcessor::MarkAsSaved is called whenever the project is saved.
You must call this method whenever the project is saved if you plan to use wxCommandProcessor::IsDirty.
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.
Sets the menu labels according to the currently set menu and the current command state.
Sets the string that will be appended to the Redo menu item.
Sets the string that will be appended to the Undo menu item.
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.
storeIt indicates whether the successful command should be stored in the history list.
Undoes the command just executed.