cc81d32f2b
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18805 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
154 lines
4.6 KiB
TeX
154 lines
4.6 KiB
TeX
\section{\class{wxCommandProcessor}}\label{wxcommandprocessor}
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wxCommandProcessor is a class that maintains a history of wxCommands,
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with undo/redo functionality built-in. Derive a new class from this
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if you want different behaviour.
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\wxheading{Derived from}
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/cmdproc.h>
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\wxheading{See also}
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\helpref{wxCommandProcessor overview}{wxcommandprocessoroverview}, \helpref{wxCommand}{wxcommand}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxCommandProcessor::wxCommandProcessor}
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\func{}{wxCommandProcessor}{\param{int}{ maxCommands = $-1$}}
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Constructor.
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{\it maxCommands} may be set to a positive integer to limit the number of
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commands stored to it, otherwise (and by default) the list of commands can grow
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arbitrarily.
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\membersection{wxCommandProcessor::\destruct{wxCommandProcessor}}
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\func{}{\destruct{wxCommandProcessor}}{\void}
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Destructor.
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\membersection{wxCommandProcessor::CanUndo}
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\func{virtual bool}{CanUndo}{\void}
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Returns true if the currently-active command can be undone, false otherwise.
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\membersection{wxCommandProcessor::ClearCommands}
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\func{virtual void}{ClearCommands}{\void}
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Deletes all the commands in the list and sets the current command pointer to NULL.
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\membersection{wxCommandProcessor::Redo}
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\func{virtual bool}{Redo}{\void}
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Executes (redoes) the current command (the command that has just been undone if any).
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\membersection{wxCommandProcessor::GetCommands}
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\constfunc{wxList\&}{GetCommands}{\void}
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Returns the list of commands.
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\membersection{wxCommandProcessor::GetMaxCommands}
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\constfunc{int}{GetMaxCommands}{\void}
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Returns the maximum number of commands that the command processor stores.
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\membersection{wxCommandProcessor::GetEditMenu}
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\constfunc{wxMenu*}{GetEditMenu}{\void}
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Returns the edit menu associated with the command processor.
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\membersection{wxCommandProcessor::GetRedoAccelerator}\label{wxcommandprocessorgetredoaccelerator}
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\constfunc{const wxString\&}{GetRedoAccelerator}{\void}
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Returns the string that will be appended to the Redo menu item.
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\membersection{wxCommandProcessor::GetRedoMenuLabel}\label{wxcommandprocessorgetredomenulabel}
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\constfunc{wxString}{GetRedoMenuLabel}{\void}
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Returns the string that will be shown for the redo menu item.
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\membersection{wxCommandProcessor::GetUndoAccelerator}\label{wxcommandprocessorgetundoaccelerator}
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\constfunc{const wxString\&}{GetUndoAccelerator}{\void}
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Returns the string that will be appended to the Undo menu item.
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\membersection{wxCommandProcessor::GetUndoMenuLabel}\label{wxcommandprocessorgetundomenulabel}
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\constfunc{wxString}{GetUndoMenuLabel}{\void}
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Returns the string that will be shown for the undo menu item.
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\membersection{wxCommandProcessor::Initialize}
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\func{virtual void}{Initialize}{\void}
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Initializes the command processor, setting the current command to the
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last in the list (if any), and updating the edit menu (if one has been
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specified).
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\membersection{wxCommandProcessor::SetEditMenu}
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\func{void}{SetEditMenu}{\param{wxMenu* }{menu}}
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Tells the command processor to update the Undo and Redo items on this
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menu as appropriate. Set this to NULL if the menu is about to be
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destroyed and command operations may still be performed, or the command
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processor may try to access an invalid pointer.
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\membersection{wxCommandProcessor::SetMenuStrings}
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\func{void}{SetMenuStrings}{\void}
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Sets the menu labels according to the currently set menu and the current
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command state.
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\membersection{wxCommandProcessor::SetRedoAccelerator}\label{wxcommandprocessorsetredoaccelerator}
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\func{void}{SetRedoAccelerator}{\param{const wxString\&}{accel}}
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Sets the string that will be appended to the Redo menu item.
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\membersection{wxCommandProcessor::SetUndoAccelerator}\label{wxcommandprocessorsetundoaccelerator}
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\func{void}{SetUndoAccelerator}{\param{const wxString\&}{accel}}
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Sets the string that will be appended to the Undo menu item.
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\membersection{wxCommandProcessor::Submit}
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\func{virtual bool}{Submit}{\param{wxCommand *}{command}, \param{bool}{ storeIt = true}}
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Submits a new command to the command processor. The command processor
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calls wxCommand::Do to execute the command; if it succeeds, the command
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is stored in the history list, and the associated edit menu (if any) updated
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appropriately. If it fails, the command is deleted
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immediately. Once Submit has been called, the passed command should not
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be deleted directly by the application.
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{\it storeIt} indicates whether the successful command should be stored
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in the history list.
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\membersection{wxCommandProcessor::Undo}
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\func{virtual bool}{Undo}{\void}
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Undoes the command just executed.
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