06d20283af
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1726 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
675 lines
17 KiB
TeX
675 lines
17 KiB
TeX
\section{\class{wxMenu}}\label{wxmenu}
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A menu is a popup (or pull down) list of items, one of which may be
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selected before the menu goes away (clicking elsewhere dismisses the
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menu). Menus may be used to construct either menu bars or popup menus.
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A menu item has an integer ID associated with it which can be used to
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identify the selection, or to change the menu item in some way.
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\wxheading{Derived from}
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\helpref{wxEvtHandler}{wxevthandler}\\
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/menu.h>
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\wxheading{Event handling}
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If the menu is part of a menubar, then \helpref{wxMenuBar}{wxmenubar} event processing is used.
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With a popup menu, there is a variety of ways to handle a menu selection event
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(wxEVT\_COMMAND\_MENU\_SELECTED).
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\begin{enumerate}\itemsep=0pt
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\item Define a callback of type wxFunction, which you pass to the wxMenu constructor.
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The callback takes a reference to the menu, and a reference to a \helpref{wxCommandEvent}{wxcommandevent}.
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\item Derive a new class from wxMenu and define event table entries using the EVT\_MENU macro.
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\item Set a new event handler for wxMenu, using an object whose class has EVT\_MENU entries.
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\item Provide EVT\_MENU handlers in the window which pops up the menu, or in an ancestor of
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this window.
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\end{enumerate}
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\wxheading{See also}
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\helpref{wxMenuBar}{wxmenubar}, \helpref{wxWindow::PopupMenu}{wxwindowpopupmenu},\rtfsp
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\helpref{Event handling overview}{eventhandlingoverview}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxMenu::wxMenu}\label{wxmenuconstr}
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\func{}{wxMenu}{\param{const wxString\& }{title = ""}, \param{const wxFunction}{ func = NULL}}
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Constructs a wxMenu object.
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\wxheading{Parameters}
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\docparam{title}{A title for the popup menu: the empty string denotes no title.}
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\docparam{func}{A callback function if the menu is used as a popup using \helpref{wxWindow::PopupMenu}{wxwindowpopupmenu}.}
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\pythonnote{The wxPython version of the \tt{wxMenu} constructor
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doesn't accept the callback argument because of reference counting
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issues. There is a specialized wxMenu constructor called
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\tt{wxPyMenu} which does and can be used for PopupMenus when callbacks
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are needed. You must retain a reference to the menu while useing it
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otherwise your callback function will get dereferenced when the menu
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does.
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}
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\membersection{wxMenu::\destruct{wxMenu}}
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\func{}{\destruct{wxMenu}}{\void}
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Destructor, destroying the menu.
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Note: under Motif, a popup menu must have a valid parent (the window
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it was last popped up on) when being destroyed. Therefore, make sure
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you delete or re-use the popup menu {\it before} destroying the
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parent window. Re-use in this context means popping up the menu on
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a different window from last time, which causes an implicit destruction
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and recreation of internal data structures.
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\membersection{wxMenu::Append}\label{wxmenuappend}
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\func{void}{Append}{\param{int}{ id}, \param{const wxString\& }{ item}, \param{const wxString\& }{helpString = ""},\rtfsp
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\param{const bool}{ checkable = FALSE}}
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Adds a string item to the end of the menu.
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\func{void}{Append}{\param{int}{ id}, \param{const wxString\& }{ item}, \param{wxMenu *}{subMenu},\rtfsp
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\param{const wxString\& }{helpString = ""}}
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Adds a pull-right submenu to the end of the menu.
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\func{void}{Append}{\param{wxMenuItem*}{ menuItem}}
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Adds a menu item object. You can specify various extra properties of a menu item this way,
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such as bitmaps and fonts.
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\wxheading{Parameters}
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\docparam{id}{The menu command identifier.}
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\docparam{item}{The string to appear on the menu item.}
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\docparam{menu}{Pull-right submenu.}
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\docparam{checkable}{If TRUE, this item is checkable.}
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\docparam{helpString}{An optional help string associated with the item.
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By default, \helpref{wxFrame::OnMenuHighlight}{wxframeonmenuhighlight} displays
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this string in the status line.}
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\docparam{menuItem}{A menuitem object. It will be owned by the wxMenu object after this function
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is called, so do not delete it yourself.}
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\wxheading{Remarks}
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This command can be used after the menu has been shown, as well as on initial
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creation of a menu or menubar.
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\wxheading{See also}
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\helpref{wxMenu::AppendSeparator}{wxmenuappendseparator}, \helpref{wxMenu::SetLabel}{wxmenusetlabel}, \helpref{wxMenu::GetHelpString}{wxmenugethelpstring},\rtfsp
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\helpref{wxMenu::SetHelpString}{wxmenusethelpstring}, \helpref{wxMenuItem}{wxmenuitem}
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\pythonnote{In place of a single overloaded method name, wxPython
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implements the following methods:\par
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\indented{2cm}{\begin{twocollist}
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\twocolitem{\bf{Append(id, string, helpStr="", checkable=FALSE)}}{}
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\twocolitem{\bf{AppendMenu(id, string, aMenu, helpStr="")}}{}
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\twocolitem{\bf{AppendItem(aMenuItem)}}{}
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\end{twocollist}}
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}
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\membersection{wxMenu::AppendSeparator}\label{wxmenuappendseparator}
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\func{void}{AppendSeparator}{\void}
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Adds a separator to the end of the menu.
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\wxheading{See also}
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\helpref{wxMenu::Append}{wxmenuappend}
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\membersection{wxMenu::Break}\label{wxmenubreak}
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\func{void}{Break}{\void}
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Inserts a break in a menu, causing the next appended item to appear in a new column.
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\membersection{wxMenu::Check}\label{wxmenucheck}
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\func{void}{Check}{\param{int}{ id}, \param{const bool}{ check}}
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Checks or unchecks the menu item.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\docparam{check}{If TRUE, the item will be checked, otherwise it will be unchecked.}
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\wxheading{See also}
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\helpref{wxMenu::IsChecked}{wxmenuischecked}
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\membersection{wxMenu::Enable}\label{wxmenuenable}
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\func{void}{Enable}{\param{int}{ id}, \param{const bool}{ enable}}
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Enables or disables (greys out) a menu item.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\docparam{enable}{TRUE to enable the menu item, FALSE to disable it.}
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\wxheading{See also}
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\helpref{wxMenu::IsEnabled}{wxmenuisenabled}
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\membersection{wxMenu::FindItem}\label{wxmenufinditem}
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\constfunc{int}{FindItem}{\param{const wxString\& }{itemString}}
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Finds the menu item id for a menu item string.
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\wxheading{Parameters}
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\docparam{itemString}{Menu item string to find.}
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\wxheading{Return value}
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Menu item identifier, or -1 if none is found.
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\wxheading{Remarks}
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Any special menu codes are stripped out of source and target strings
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before matching.
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\wxheading{See also}
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\helpref{wxMenu::FindItemForId}{wxmenufinditemforid}
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\membersection{wxMenu::FindItemForId}\label{wxmenufinditemforid}
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\constfunc{wxMenuItem*}{FindItemForId}{\param{int}{ id}}
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Finds the menu item object associated with the given menu item identifier.
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\wxheading{Parameters}
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\docparam{id}{Menu item identifier.}
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\wxheading{Return value}
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Returns the menu item object, or NULL if it is not found.
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\wxheading{See also}
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\helpref{wxMenu::FindItem}{wxmenufinditem}
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\membersection{wxMenu::GetHelpString}\label{wxmenugethelpstring}
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\constfunc{wxString}{GetHelpString}{\param{int}{ id}}
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Returns the help string associated with a menu item.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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The help string, or the empty string if there is no help string or the
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item was not found.
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\wxheading{See also}
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\helpref{wxMenu::SetHelpString}{wxmenusethelpstring}, \helpref{wxMenu::Append}{wxmenuappend}
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\membersection{wxMenu::GetLabel}\label{wxmenugetlabel}
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\constfunc{wxString}{GetLabel}{\param{int}{ id}}
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Returns a menu item label.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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The item label, or the empty string if the item was not found.
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\wxheading{See also}
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\helpref{wxMenu::SetLabel}{wxmenusetlabel}
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\membersection{wxMenu::GetTitle}\label{wxmenugettitle}
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\constfunc{wxString}{GetTitle}{\void}
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Returns the title of the menu.
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\wxheading{Remarks}
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This is relevant only to popup menus.
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\wxheading{See also}
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\helpref{wxMenu::SetTitle}{wxmenusettitle}
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\membersection{wxMenu::IsChecked}\label{wxmenuischecked}
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\constfunc{bool}{IsChecked}{\param{int}{ id}}
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Determines whether a menu item is checked.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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TRUE if the menu item is checked, FALSE otherwise.
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\wxheading{See also}
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\helpref{wxMenu::Check}{wxmenucheck}
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\membersection{wxMenu::IsEnabled}\label{wxmenuisenabled}
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\constfunc{bool}{IsEnabled}{\param{int}{ id}}
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Determines whether a menu item is enabled.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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TRUE if the menu item is enabled, FALSE otherwise.
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\wxheading{See also}
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\helpref{wxMenu::Enable}{wxmenuenable}
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\membersection{wxMenu::SetHelpString}\label{wxmenusethelpstring}
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\func{void}{SetHelpString}{\param{int}{ id}, \param{const wxString\& }{helpString}}
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Sets an item's help string.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\docparam{helpString}{The help string to set.}
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\wxheading{See also}
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\helpref{wxMenu::GetHelpString}{wxmenugethelpstring}
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\membersection{wxMenu::SetLabel}\label{wxmenusetlabel}
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\func{void}{SetLabel}{\param{int}{ id}, \param{const wxString\& }{label}}
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Sets the label of a menu item.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\docparam{label}{The menu item label to set.}
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\wxheading{See also}
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\helpref{wxMenu::Append}{wxmenuappend}, \helpref{wxMenu::GetLabel}{wxmenugetlabel}
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\membersection{wxMenu::SetTitle}\label{wxmenusettitle}
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\func{void}{SetTitle}{\param{const wxString\& }{title}}
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Sets the title of the menu.
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\wxheading{Parameters}
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\docparam{title}{The title to set.}
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\wxheading{Remarks}
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This is relevant only to popup menus.
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\wxheading{See also}
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\helpref{wxMenu::SetTitle}{wxmenusettitle}
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\membersection{wxMenu::UpdateUI}\label{wxmenuupdateui}
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\constfunc{void}{UpdateUI}{\param{wxEvtHandler*}{ source = NULL}}
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Sends events to {\it source} (or owning window if NULL) to update the
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menu UI. This is called just before the menu is popped up with \helpref{wxWindow::PopupMenu}{wxwindowpopupmenu}, but
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the application may call it at other times if required.
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\wxheading{See also}
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\helpref{wxUpdateUIEvent}{wxupdateuievent}
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\section{\class{wxMenuBar}}\label{wxmenubar}
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A menu bar is a series of menus accessible from the top of a frame.
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\wxheading{Derived from}
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\helpref{wxEvtHandler}{wxevthandler}\\
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/menu.h>
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\wxheading{Event handling}
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To respond to a menu selection, provide a handler for EVT\_MENU, in the frame
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that contains the menu bar.
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\wxheading{See also}
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\helpref{wxMenu}{wxmenu}, \helpref{Event handling overview}{eventhandlingoverview}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxMenuBar::wxMenuBar}\label{wxmenubarconstr}
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\func{void}{wxMenuBar}{\void}
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Default constructor.
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\func{void}{wxMenuBar}{\param{int}{ n}, \param{wxMenu*}{ menus[]}, \param{const wxString }{titles[]}}
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Construct a menu bar from arrays of menus and titles.
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\wxheading{Parameters}
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\docparam{n}{The number of menus.}
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\docparam{menus}{An array of menus. Do not use this array again - it now belongs to the
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menu bar.}
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\docparam{titles}{An array of title strings. Deallocate this array after creating the menu bar.}
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\pythonnote{Only the default constructor is supported in wxPython.
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Use wxMenuBar.Append instead.}
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\membersection{wxMenuBar::\destruct{wxMenuBar}}
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\func{void}{\destruct{wxMenuBar}}{\void}
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Destructor, destroying the menu bar and removing it from the parent frame (if any).
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\membersection{wxMenuBar::Append}\label{wxmenubarappend}
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\func{void}{Append}{\param{wxMenu *}{menu}, \param{const wxString\& }{title}}
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Adds the item to the end of the menu bar.
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\wxheading{Parameters}
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\docparam{menu}{The menu to add. Do not deallocate this menu after calling {\bf Append}.}
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\docparam{title}{The title of the menu.}
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\membersection{wxMenuBar::Check}\label{wxmenubarcheck}
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\func{void}{Check}{\param{int}{ id}, \param{const bool}{ check}}
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Checks or unchecks a menu item.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\docparam{check}{If TRUE, checks the menu item, otherwise the item is unchecked.}
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\wxheading{Remarks}
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Only use this when the menu bar has been associated
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with a frame; otherwise, use the wxMenu equivalent call.
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\membersection{wxMenuBar::Enable}\label{wxmenubarenable}
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\func{void}{Enable}{\param{int}{ id}, \param{const bool}{ enable}}
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Enables or disables (greys out) a menu item.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\docparam{enable}{TRUE to enable the item, FALSE to disable it.}
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\wxheading{Remarks}
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Only use this when the menu bar has been
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associated with a frame; otherwise, use the wxMenu equivalent call.
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\membersection{wxMenuBar::EnableTop}\label{wxmenubarenabletop}
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\func{void}{EnableTop}{\param{int}{ pos}, \param{const bool}{ enable}}
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Enables or disables a whole menu.
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\wxheading{Parameters}
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\docparam{pos}{The position of the menu, starting from zero.}
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\docparam{enable}{TRUE to enable the menu, FALSE to disable it.}
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\wxheading{Remarks}
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Only use this when the menu bar has been
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associated with a frame.
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\membersection{wxMenuBar::FindMenuItem}\label{wxmenubarfindmenuitem}
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\constfunc{int}{FindMenuItem}{\param{const wxString\& }{menuString}, \param{const wxString\& }{itemString}}
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Finds the menu item id for a menu name/menu item string pair.
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\wxheading{Parameters}
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\docparam{menuString}{Menu title to find.}
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\docparam{itemString}{Item to find.}
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\wxheading{Return value}
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The menu item identifier, or -1 if none was found.
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\wxheading{Remarks}
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Any special menu codes are stripped out of source and target strings
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before matching.
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\membersection{wxMenuBar::FindItemById}\label{wxmenubarfinditembyid}
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\constfunc{wxMenuItem *}{FindItemById}{\param{int}{ id}}
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Finds the menu item object associated with the given menu item identifier,
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\wxheading{Parameters}
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\docparam{id}{Menu item identifier.}
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\wxheading{Return value}
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The found menu item object, or NULL if one was not found.
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\membersection{wxMenuBar::GetHelpString}\label{wxmenubargethelpstring}
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\constfunc{wxString}{GetHelpString}{\param{int}{ id}}
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Gets the help string associated with the menu item identifer.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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The help string, or the empty string if there was no help string or the menu item
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was not found.
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\wxheading{See also}
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\helpref{wxMenuBar::SetHelpString}{wxmenubarsethelpstring}
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\membersection{wxMenuBar::GetLabel}\label{wxmenubargetlabel}
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\constfunc{wxString}{GetLabel}{\param{int}{ id}}
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Gets the label associated with a menu item.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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The menu item label, or the empty string if the item was not found.
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\wxheading{Remarks}
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Use only after the menubar has been associated with a frame.
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\membersection{wxMenuBar::GetLabelTop}\label{wxmenubargetlabeltop}
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\constfunc{wxString}{GetLabelTop}{\param{int}{ pos}}
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Returns the label of a top-level menu.
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\wxheading{Parameters}
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\docparam{pos}{Position of the menu on the menu bar, starting from zero.}
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\wxheading{Return value}
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The menu label, or the empty string if the menu was not found.
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\wxheading{Remarks}
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Use only after the menubar has been associated with a frame.
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\wxheading{See also}
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\helpref{wxMenuBar::SetLabelTop}{wxmenubarsetlabeltop}
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\membersection{wxMenuBar::GetMenu}\label{wxmenubargetmenu}
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\constfunc{wxMenu*}{GetMenu}{\param{int}{ menuIndex}}
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Returns the menu at {\it menuIndex} (zero-based).
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\membersection{wxMenuBar::GetMenuCount}\label{wxmenubargetmenucount}
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\constfunc{int}{GetMenuCount}{\void}
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Returns the number of menus in this menubar.
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\membersection{wxMenuBar::IsChecked}\label{wxmenubarischecked}
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\constfunc{bool}{IsChecked}{\param{int}{ id}}
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Determines whether an item is checked.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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TRUE if the item was found and is checked, FALSE otherwise.
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\membersection{wxMenuBar::IsEnabled}\label{wxmenubarisenabled}
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\constfunc{bool}{IsEnabled}{\param{int}{ id}}
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Determines whether an item is enabled.
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\wxheading{Parameters}
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\docparam{id}{The menu item identifier.}
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\wxheading{Return value}
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TRUE if the item was found and is enabled, FALSE otherwise.
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\membersection{wxMenuBar::SetHelpString}\label{wxmenubarsethelpstring}
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\func{void}{SetHelpString}{\param{int}{ id}, \param{const wxString\& }{helpString}}
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Sets the help string associated with a menu item.
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\wxheading{Parameters}
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\docparam{id}{Menu item identifier.}
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\docparam{helpString}{Help string to associate with the menu item.}
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\wxheading{See also}
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\helpref{wxMenuBar::GetHelpString}{wxmenubargethelpstring}
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\membersection{wxMenuBar::SetLabel}\label{wxmenubarsetlabel}
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\func{void}{SetLabel}{\param{int}{ id}, \param{const wxString\& }{label}}
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Sets the label of a menu item.
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\wxheading{Parameters}
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\docparam{id}{Menu item identifier.}
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\docparam{label}{Menu item label.}
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\wxheading{Remarks}
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Use only after the menubar has been associated with a frame.
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\wxheading{See also}
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\helpref{wxMenuBar::GetLabel}{wxmenubargetlabel}
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\membersection{wxMenuBar::SetLabelTop}\label{wxmenubarsetlabeltop}
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\func{void}{SetLabelTop}{\param{int}{ pos}, \param{const wxString\& }{label}}
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Sets the label of a top-level menu.
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\wxheading{Parameters}
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\docparam{pos}{The position of a menu on the menu bar, starting from zero.}
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\docparam{label}{The menu label.}
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\wxheading{Remarks}
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Use only after the menubar has been associated with a frame.
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\wxheading{See also}
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\helpref{wxMenuBar::GetLabelTop}{wxmenubargetlabeltop}
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