projects / wxWidgets.git / blame
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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 | ||
| 954b8ae6 JS |
11 | \wxheading{Include files} |
| 12 | ||
| 13 | <wx/docview.h> | |
| 14 | ||
| a660d684 KB |
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::Initialize} | |
| 74 | ||
| 75 | \func{virtual void}{Initialize}{\void} | |
| 76 | ||
| 77 | Initializes the command processor, setting the current command to the | |
| 78 | last in the list (if any), and updating the edit menu (if one has been | |
| 79 | specified). | |
| 80 | ||
| 81 | \membersection{wxCommandProcessor::SetEditMenu} | |
| 82 | ||
| 83 | \func{void}{SetEditMenu}{\param{wxMenu* }{menu}} | |
| 84 | ||
| 85 | Tells the command processor to update the Undo and Redo items on this | |
| 86 | menu as appropriate. Set this to NULL if the menu is about to be | |
| 87 | destroyed and command operations may still be performed, or the command | |
| 88 | processor may try to access an invalid pointer. | |
| 89 | ||
| 90 | \membersection{wxCommandProcessor::Submit} | |
| 91 | ||
| 92 | \func{virtual bool}{Submit}{\param{wxCommand *}{command}, \param{bool}{ storeIt = TRUE}} | |
| 93 | ||
| 94 | Submits a new command to the command processor. The command processor | |
| 95 | calls wxCommand::Do to execute the command; if it succeeds, the command | |
| 96 | is stored in the history list, and the associated edit menu (if any) updated | |
| 97 | appropriately. If it fails, the command is deleted | |
| 98 | immediately. Once Submit has been called, the passed command should not | |
| 99 | be deleted directly by the application. | |
| 100 | ||
| 101 | {\it storeIt} indicates whether the successful command should be stored | |
| 102 | in the history list. | |
| 103 | ||
| 104 | \membersection{wxCommandProcessor::Undo} | |
| 105 | ||
| 106 | \func{virtual bool}{Undo}{\void} | |
| 107 | ||
| 108 | Undoes the command just executed. | |
| 109 | ||
| 110 |