1. Manuals
  2. Tumbleweed
  3. tk
  4. tk_menuSetFocus(n)

Scroll to navigation

menu(n) Tk Built-In Commands menu(n) 





NAME


menu, tk_menuSetFocus - Create and manipulate 'menu' widgets and
    menubars






SYNOPSIS


menu pathName ?options?
tk_menuSetFocus pathName






STANDARD OPTIONS


-activebackground	-borderwidth	-foreground
-activeborderwidth	-cursor	-relief
-activeforeground	-disabledforeground	-takefocus
-background	-font


See the options manual entry for details on the standard
    options.






WIDGET-SPECIFIC OPTIONS


Command-Line Name:	-postcommand
Database Name:	postCommand
Database Class:	Command



  

  
If this option is specified then it provides a Tcl command to execute each
      time the menu is posted. The command is invoked by the post widget
      command before posting the menu. Note that in Tk 8.0 on Macintosh and
      Windows, all post-commands in a system of menus are executed before any of
      those menus are posted. This is due to the limitations in the individual
      platforms' menu managers.






Command-Line Name:	-selectcolor
Database Name:	selectColor
Database Class:	Background



  

  
For menu entries that are check buttons or radio buttons, this option
      specifies the color to display in the indicator when the check button or
      radio button is selected.






Command-Line Name:	-tearoff
Database Name:	tearOff
Database Class:	TearOff



  

  
This option must have a proper boolean value, which specifies whether or
      not the menu should include a tear-off entry at the top. If so, it will
      exist as entry 0 of the menu and the other entries will number starting at
      1. The default menu bindings arrange for the menu to be torn off when the
      tear-off entry is invoked. This option is ignored under Aqua/macOS, where
      menus cannot be torn off.






Command-Line Name:	-tearoffcommand
Database Name:	tearOffCommand
Database Class:	TearOffCommand



  

  
If this option has a non-empty value, then it specifies a Tcl command to
      invoke whenever the menu is torn off. The actual command will consist of
      the value of this option, followed by a space, followed by the name of the
      menu window, followed by a space, followed by the name of the name of the
      torn off menu window. For example, if the option's value is “a
      b” and menu .x.y is torn off to create a new menu
      .x.tearoff1, then the command “a b .x.y
      .x.tearoff1” will be invoked. This option is ignored under
      Aqua/macOS, where menus cannot be torn off.






Command-Line Name:	-title
Database Name:	title
Database Class:	Title



  

  
The string will be used to title the window created when this menu is torn
      off. If the title is NULL, then the window will have the title of the
      menubutton or the text of the cascade item from which this menu was
      invoked.






Command-Line Name:	-type
Database Name:	type
Database Class:	Type



  

  
This option can be one of menubar, tearoff, or
      normal, and is set when the menu is created. While the string
      returned by the configuration database will change if this option is
      changed, this does not affect the menu widget's behavior. This is used by
      the cloning mechanism and is not normally set outside of the Tk library.
    
    

    

  








INTRODUCTION


The menu command creates a new top-level window (given by
    the pathName argument) and makes it into a menu widget. That menu
    widget can either be used as a pop-up window or applied to a toplevel
    (with its -menu option) to make it into the menubar for that
    toplevel. Additional options, described above, may be specified on the
    command line or in the option database to configure aspects of the menu such
    as its colors and font. The menu command returns its pathName
    argument. At the time this command is invoked, there must not exist a window
    named pathName, but pathName's parent must exist.


A menu is a widget that displays a collection of one-line entries
    arranged in one or more columns. There exist several different types of
    entries, each with different properties. Entries of different types may be
    combined in a single menu. Menu entries are not the same as entry widgets.
    In fact, menu entries are not even distinct widgets; the entire menu is one
    widget.


Menu entries are displayed with up to three separate fields. The
    main field is a label in the form of a text string, a bitmap, or an image,
    controlled by the -label, -bitmap, and -image options
    for the entry. If the -accelerator option is specified for an entry
    then a second textual field is displayed to the right of the label. The
    accelerator typically describes a keystroke sequence that may be used in the
    application to cause the same result as invoking the menu entry. This is a
    display option, it does not actually set the corresponding binding (which
    can be achieved using the bind command). The third field is an
    indicator. The indicator is present only for checkbutton or
    radiobutton entries. It indicates whether the entry is selected or not, and
    is displayed to the left of the entry's string.


In normal use, an entry becomes active (displays itself
    differently) whenever the mouse pointer is over the entry. If a mouse button
    is released over the entry then the entry is invoked. The effect of
    invocation is different for each type of entry; these effects are described
    below in the sections on individual entries.


Entries may be disabled, which causes their labels and
    accelerators to be displayed with dimmer colors. The default menu bindings
    will not allow a disabled entry to be activated or invoked. Disabled entries
    may be re-enabled, at which point it becomes possible to activate and invoke
    them again.


Whenever a menu's active entry is changed, a
    <<MenuSelect>> virtual event is send to the menu. The active
    item can then be queried from the menu, and an action can be taken, such as
    setting context-sensitive help text for the entry.






TYPES OF ENTRIES




COMMAND ENTRIES


The most common kind of menu entry is a command entry, which
    behaves much like a button widget. When a command entry is invoked, a Tcl
    command is executed. The Tcl command is specified with the -command
    option.






SEPARATOR ENTRIES


A separator is an entry that is displayed as a horizontal dividing
    line. A separator may not be activated or invoked, and it has no behavior
    other than its display appearance.






CHECKBUTTON ENTRIES


A checkbutton menu entry behaves much like a checkbutton widget.
    When it is invoked it toggles back and forth between the selected and
    deselected states. When the entry is selected, a particular value is stored
    in a particular global variable (as determined by the -onvalue and
    -variable options for the entry); when the entry is deselected
    another value (determined by the -offvalue option) is stored in the
    global variable. An indicator box is displayed to the left of the label in a
    checkbutton entry. If the entry is selected then the indicator's center is
    displayed in the color given by the -selectcolor option for the
    entry; otherwise the indicator's center is displayed in the background color
    for the menu. If a -command option is specified for a checkbutton
    entry, then its value is evaluated as a Tcl command each time the entry is
    invoked; this happens after toggling the entry's selected state.






RADIOBUTTON ENTRIES


A radiobutton menu entry behaves much like a radiobutton widget.
    Radiobutton entries are organized in groups of which only one entry may be
    selected at a time. Whenever a particular entry becomes selected it stores a
    particular value into a particular global variable (as determined by the
    -value and -variable options for the entry). This action
    causes any previously-selected entry in the same group to deselect itself.
    Once an entry has become selected, any change to the entry's associated
    variable will cause the entry to deselect itself. Grouping of radiobutton
    entries is determined by their associated variables: if two entries have the
    same associated variable then they are in the same group. An indicator
    diamond is displayed to the left of the label in each radiobutton entry. If
    the entry is selected then the indicator's center is displayed in the color
    given by the -selectcolor option for the entry; otherwise the
    indicator's center is displayed in the background color for the menu. If a
    -command option is specified for a radiobutton entry, then its value
    is evaluated as a Tcl command each time the entry is invoked; this happens
    after selecting the entry.






CASCADE ENTRIES


A cascade entry is one with an associated menu (determined by the
    -menu option). Cascade entries allow the construction of cascading
    menus. The postcascade widget command can be used to post and unpost
    the associated menu just next to of the cascade entry. The associated menu
    must be a child of the menu containing the cascade entry (this is needed in
    order for menu traversal to work correctly).


A cascade entry posts its associated menu by invoking a Tcl
    command of the form




menu post x y



where menu is the path name of the associated menu, and x and
  y are the root-window coordinates of the upper-right corner of the
  cascade entry. On Unix, the lower-level menu is unposted by executing a Tcl
  command with the form



menu unpost



where menu is the name of the associated menu. On other platforms, the
  platform's native code takes care of unposting the menu.

If a -command option is specified for a cascade entry then
    it is evaluated as a Tcl command whenever the entry is invoked. This is not
    supported on Windows.






TEAR-OFF ENTRIES


A tear-off entry appears at the top of the menu if enabled with
    the -tearoff option. It is not like other menu entries in that it
    cannot be created with the add widget command and cannot be deleted
    with the delete widget command. When a tear-off entry is created it
    appears as a dashed line at the top of the menu. Under the default bindings,
    invoking the tear-off entry causes a torn-off copy to be made of the menu
    and all of its submenus.








MENUBARS


Any menu can be set as a menubar for a toplevel window (see
    toplevel command for syntax). On the Macintosh, whenever the toplevel
    is in front, this menu's cascade items will appear in the menubar across the
    top of the main monitor. On Windows and Unix, this menu's items will be
    displayed in a menubar across the top of the window. These menus will behave
    according to the interface guidelines of their platforms. For every menu set
    as a menubar, a clone menu is made. See the CLONES section for more
    information.


As noted, menubars may behave differently on different platforms.
    One example of this concerns the handling of checkbuttons and radiobuttons
    within the menu. While it is permitted to put these menu elements on
    menubars, they may not be drawn with indicators on some platforms, due to
    system restrictions.




SPECIAL MENUS IN MENUBARS


Certain menus in a menubar will be treated specially. On the
    Macintosh, access to the special Application, Window and Help menus is
    provided. On Windows, access to the Windows System menu in each window is
    provided. On X Windows, a special right-justified help menu may be provided
    if Motif menu compatibility is enabled. In all cases, these menus must be
    created with the command name of the menubar menu concatenated with the
    special name. So for a menubar named .menubar, on the Macintosh, the special
    menus would be .menubar.apple, .menubar.window and .menubar.help; on
    Windows, the special menu would be .menubar.system; on X Windows, the help
    menu would be .menubar.help.


When Tk sees a .menubar.apple menu as the first menu in a menubar
    on the Macintosh, that menu's contents make up the first items of the
    Application menu whenever the window containing the menubar is in front.
    After all of the Tk-defined items, the menu will have a separator, followed
    by all standard Application menu items. Such a .apple menu must be present
    in a menu when that menu is first configured as a toplevel's menubar,
    otherwise a default application menu (hidden from Tk) will be inserted into
    the menubar at that time and subsequent addition of a .apple menu will no
    longer result in it becoming the Application menu.


When Tk sees a .menubar.window menu on the Macintosh, the menu's
    contents are inserted into the standard Window menu of the user's menubar
    whenever the window's menubar is in front. The first items in the menu are
    provided by macOS, and the names of the current toplevels are automatically
    appended after all the Tk-defined items and a separator. The Window menu on
    the Mac also allows toggling the window into a fullscreen state, and
    managing a tabbed window interface (multiple windows grouped into a single
    window) if supported by that version of the operating system.


When Tk sees a .menubar.help menu on the Macintosh, the menu's
    contents are appended to the standard Help menu of the user's menubar
    whenever the window's menubar is in front. The first items in the menu are
    provided by macOS.


When Tk sees a System menu on Windows, its items are appended to
    the system menu that the menubar is attached to. This menu is tied to the
    application icon and can be invoked with the mouse or by typing
    Alt+Spacebar. Due to limitations in the Windows API, any font changes,
    colors, images, bitmaps, or tearoff images will not appear in the system
    menu.


When Tk sees a Help menu on X Windows and Motif menu compatibility
    is enabled the menu is moved to be last in the menubar and is right
    justified. Motif menu compatibility is enabled by setting the Tk option
    *Menu.useMotifHelp to true or by calling tk::classic::restore
    menu.








CLONES


When a menu is set as a menubar for a toplevel window, or when a
    menu is torn off, a clone of the menu is made. This clone is a menu widget
    in its own right, but it is a child of the original. Changes in the
    configuration of the original are reflected in the clone. Additionally, any
    cascades that are pointed to are also cloned so that menu traversal will
    work right. Clones are destroyed when either the tearoff or menubar goes
    away, or when the original menu is destroyed.






WIDGET COMMAND


The menu command creates a new Tcl command whose name is
    pathName. This command may be used to invoke various operations on
    the widget. It has the following general form:




pathName option ?arg arg ...?



Option and the args determine the exact behavior of the command.

Many of the widget commands for a menu take as one argument an
    indicator of which entry of the menu to operate on. These indicators are
    called indexes and may be specified in any of the following
  forms:



  

  
Indicates the entry that is currently active. If no entry is active then
      this form is equivalent to none. This form may not be
    abbreviated.

  

  
Indicates the bottommost entry in the menu. If there are no entries in the
      menu then this form is equivalent to none. This form may not be
      abbreviated.

  

  
Same as end.

  

  
Indicates “no entry at all”; this is used most commonly with
      the activate option to deactivate all the entries in the menu. In
      most cases the specification of none causes nothing to happen in
      the widget command. This form may not be abbreviated.

  
@x,y

  
Indicates the entry that covers the point in the menu's window specified
      by x and y (in pixel coordinates). If no entry covers that
      point, then this form is equivalent to none. If only a single
      number is specified, it is treated as the y-coordinate.

  

  
Specifies the entry numerically, where 0 corresponds to the top-most entry
      of the menu, 1 to the entry below it, and so on.

  

  
If the index does not satisfy one of the above forms then this form is
      used. Pattern is pattern-matched against the label of each entry in
      the menu, in order from the top down, until a matching entry is found. The
      rules of string match are used.




If the index could match more than one of the above forms, then
    the form earlier in the above list takes precedence.


The following widget commands are possible for menu widgets:



  

  
Change the state of the entry indicated by index to active
      and redisplay it using its active colors. Any previously-active entry is
      deactivated. If index is specified as none, or if the
      specified entry is disabled, then the menu ends up with no active entry.
      Returns an empty string.

  

  
Add a new entry to the bottom of the menu. The new entry's type is given
      by type and must be one of cascade, checkbutton,
      command, radiobutton, or separator, or a unique
      abbreviation of one of the above. If additional arguments are present,
      they specify the options listed in the MENU ENTRY OPTIONS section
      below. The add widget command returns an empty string.

  

  
Returns the current value of the configuration option given by
      option. Option may have any of the values accepted by the
      menu command.

  

  
Makes a clone of the current menu named newPathName. This clone is
      a menu in its own right, but any changes to the clone are propagated to
      the original menu and vice versa. cloneType can be normal,
      menubar, or tearoff. Should not normally be called outside
      of the Tk library. See the CLONES section for more
    information.

  

  
Query or modify the configuration options of the widget. If no
      option is specified, returns a list describing all of the available
      options for pathName (see Tk_ConfigureInfo for information
      on the format of this list). If option is specified with no
      value, then the command returns a list describing the one named
      option (this list will be identical to the corresponding sublist of the
      value returned if no option is specified). If one or more
      option-value pairs are specified, then the command modifies the
      given widget option(s) to have the given value(s); in this case the
      command returns an empty string. Option may have any of the values
      accepted by the menu command.

  

  
Delete all of the menu entries between index1 and index2
      inclusive. If index2 is omitted then it defaults to index1.
      Attempts to delete a tear-off menu entry are ignored (instead, you should
      change the -tearoff option to remove the tear-off entry).

  

  
Returns the current value of a configuration option for the entry given by
      index. Option may have any of the names described in the
      MENU ENTRY OPTIONS section below.

  

  
This command is similar to the configure command, except that it
      applies to the options for an individual entry, whereas configure
      applies to the options for the menu as a whole. Options may have
      any of the values described in the MENU ENTRY OPTIONS section
      below. If options are specified, options are modified as indicated
      in the command and the command returns an empty string. If no
      options are specified, returns a list describing the current
      options for entry index (see Tk_ConfigureInfo for
      information on the format of this list).

  

  
Returns the numerical index corresponding to index, or none
      if index was specified as none.

  

  
Same as the add widget command except that it inserts the new entry
      just before the entry given by index, instead of appending to the
      end of the menu. The type, option, and value
      arguments have the same interpretation as for the add widget
      command. It is not possible to insert new menu entries before the tear-off
      entry, if the menu has one.

  

  
Invoke the action of the menu entry. See the sections on the individual
      entries above for details on what happens. If the menu entry is disabled
      then nothing happens. If the entry has a command associated with it then
      the result of that command is returned as the result of the invoke
      widget command. Otherwise the result is an empty string. Note: invoking a
      menu entry does not automatically unpost the menu; the default bindings
      normally take care of this before invoking the invoke widget
      command.

  

  
Arrange for the menu to be displayed on the screen at the root-window
      coordinates given by x and y. If an index is specified the
      menu will be located so that the entry with that index is displayed at the
      point. These coordinates are adjusted if necessary to guarantee that the
      entire menu is visible on the screen. This command normally returns an
      empty string. If the -postcommand option has been specified, then
      its value is executed as a Tcl script before posting the menu and the
      result of that script is returned as the result of the post widget
      command. If an error returns while executing the command, then the error
      is returned without posting the menu.

  

  
Posts the submenu associated with the cascade entry given by index,
      and unposts any previously posted submenu. If index does not
      correspond to a cascade entry, or if pathName is not posted, the
      command has no effect except to unpost any currently posted submenu.

  

  
Returns the type of the menu entry given by index. This is the
      type argument passed to the add or insert widget
      command when the entry was created, such as command or
      separator, or tearoff for a tear-off entry.

  

  
Unmap the window so that it is no longer displayed. If a lower-level
      cascaded menu is posted, unpost that menu. Returns an empty string. This
      subcommand does not work on Windows and the Macintosh, as those platforms
      have their own way of unposting menus.

  

  
Returns a decimal string giving the x-coordinate within the menu window of
      the leftmost pixel in the entry specified by index.

  

  
Returns a decimal string giving the y-coordinate within the menu window of
      the topmost pixel in the entry specified by index.








MENU ENTRY OPTIONS


The following options are allowed on menu entries. Most options
    are not supported by all entry types.



  

  
Specifies a background color to use for displaying this entry when it is
      active. This option is ignored on Aqua/macOS. If it is specified as an
      empty string (the default), then the -activebackground option for
      the overall menu is used. If the tk_strictMotif variable has been
      set to request strict Motif compliance, then this option is ignored and
      the -background option is used in its place. This option is not
      available for separator or tear-off entries.

  

  
Specifies a foreground color to use for displaying this entry when it is
      active. This option is ignored on Aqua/macOS. If this option is specified
      as an empty string (the default), then the -activeforeground option
      for the overall menu is used. This option is not available for separator
      or tear-off entries.

  

  
Specifies a string to display at the right side of the menu entry.
      Normally describes an accelerator keystroke sequence that may be used to
      invoke the same function as the menu entry. This is a display option, it
      does not actually set the corresponding binding (which can be achieved
      using the bind command). This option is not available for separator
      or tear-off entries.

  

  
Specifies a background color to use for displaying this entry when it is
      in the normal state (neither active nor disabled). This option is ignored
      on Aqua/macOS. If it is specified as an empty string (the default), then
      the -background option for the overall menu is used. This option is
      not available for separator or tear-off entries.

  

  
Specifies a bitmap to display in the menu instead of a textual label, in
      any of the forms accepted by Tk_GetBitmap. This option overrides
      the -label option (as controlled by the -compound option)
      but may be reset to an empty string to enable a textual label to be
      displayed. If a -image option has been specified, it overrides
      -bitmap. This option is not available for separator or tear-off
      entries.

  

  
When this option is zero, the entry appears below the previous entry. When
      this option is one, the entry appears at the top of a new column in the
      menu. This option is ignored on Aqua/macOS, where menus are always a
      single column.

  

  
Specifies a Tcl command to execute when the menu entry is invoked. Not
      available for separator or tear-off entries.

  

  
Specifies whether the menu entry should display both an image and text,
      and if so, where the image should be placed relative to the text. Valid
      values for this option are bottom, center, left,
      none, right and top. The default value is
      none, meaning that the button will display either an image or text,
      depending on the values of the -image and -bitmap
    options.

  

  
Specifies the font to use when drawing the label or accelerator string in
      this entry. If this option is specified as an empty string (the default)
      then the -font option for the overall menu is used. This option is
      not available for separator or tear-off entries.

  

  
Specifies a foreground color to use for displaying this entry when it is
      in the normal state (neither active nor disabled). This option is ignored
      on Aqua/macOS. If it is specified as an empty string (the default), then
      the -foreground option for the overall menu is used. This option is
      not available for separator or tear-off entries.

  

  
Specifies whether the standard margins should be drawn for this menu
      entry. This is useful when creating palette with images in them, i.e.,
      color palettes, pattern palettes, etc. 1 indicates that the margin for the
      entry is hidden; 0 means that the margin is used.

  

  
Specifies an image to display in the menu instead of a text string or
      bitmap. The image must have been created by some previous invocation of
      image create. This option overrides the -label and
      -bitmap options (as controlled by the -compound option) but
      may be reset to an empty string to enable a textual or bitmap label to be
      displayed. This option is not available for separator or tear-off
    entries.

  

  
Available only for checkbutton and radiobutton entries. Value is a
      boolean that determines whether or not the indicator should be
    displayed.

  

  
Specifies a string to display as an identifying label in the menu entry.
      Not available for separator or tear-off entries.

  
  
Available only for cascade entries. Specifies the path name of the submenu
      associated with this entry. The submenu must be a child of the menu.

  

  
Available only for checkbutton entries. Specifies the value to store in
      the entry's associated variable when the entry is deselected.

  

  
Available only for checkbutton entries. Specifies the value to store in
      the entry's associated variable when the entry is selected.

  

  
Available only for checkbutton and radiobutton entries. Specifies the
      color to display in the indicator when the entry is selected. If the value
      is an empty string (the default) then the -selectcolor option for
      the menu determines the indicator color.

  

  
Available only for checkbutton and radiobutton entries. Specifies an image
      to display in the entry (in place of the -image option) when it is
      selected. Value is the name of an image, which must have been
      created by some previous invocation of image create. This option is
      ignored unless the -image option has been specified.

  

  
Specifies one of three states for the entry: normal, active,
      or disabled. In normal state the entry is displayed using the
      -foreground option for the menu and the -background option
      from the entry or the menu. The active state is typically used when the
      pointer is over the entry. In active state the entry is displayed using
      the -activeforeground option for the menu along with the
      -activebackground option from the entry. Disabled state means that
      the entry should be insensitive: the default bindings will refuse to
      activate or invoke the entry. In this state the entry is displayed
      according to the -disabledforeground option for the menu and the
      -background option from the entry. This option is not available for
      separator entries.

  

  
Specifies the integer index of a character to underline in the entry. This
      option is also queried by the default bindings and used to implement
      keyboard traversal. 0 corresponds to the first character of the text
      displayed in the entry, 1 to the next character, and so on. If a bitmap or
      image is displayed in the entry then this option is ignored. This option
      is not available for separator or tear-off entries.

  

  
Available only for radiobutton entries. Specifies the value to store in
      the entry's associated variable when the entry is selected. If an empty
      string is specified, then the -label option for the entry as the
      value to store in the variable.

  

  
Available only for checkbutton and radiobutton entries. Specifies the name
      of a global variable to set when the entry is selected. For checkbutton
      entries the variable is also set when the entry is deselected. For
      radiobutton entries, changing the variable causes the currently-selected
      entry to deselect itself.






For checkbutton entries, the default value of this option is taken
    from the -label option, and for radiobutton entries a single fixed
    value is used. It is recommended that you always set the -variable
    option when creating either a checkbutton or a radiobutton.








MENU CONFIGURATIONS


The default bindings support four different ways of using
  menus:



  

  
This is the most common case. You create a menu widget that will become
      the menu bar. You then add cascade entries to this menu, specifying the
      pull down menus you wish to use in your menu bar. You then create all of
      the pulldowns. Once you have done this, specify the menu using the
      -menu option of the toplevel's widget command. See the
      toplevel manual entry for details.

  

  
This is the compatible way to do menu bars. You create one menubutton
      widget for each top-level menu, and typically you arrange a series of
      menubuttons in a row in a menubar window. You also create the top-level
      menus and any cascaded submenus, and tie them together with -menu
      options in menubuttons and cascade menu entries. The top-level menu must
      be a child of the menubutton, and each submenu must be a child of the menu
      that refers to it. Once you have done this, the default bindings will
      allow users to traverse and invoke the tree of menus via its menubutton;
      see the menubutton manual entry for details.

  
  
Popup menus typically post in response to a mouse button press or
      keystroke. You create the popup menus and any cascaded submenus, then you
      call the tk_popup procedure at the appropriate time to post the
      top-level menu.

  

  
An option menu consists of a menubutton with an associated menu that
      allows you to select one of several values. The current value is displayed
      in the menubutton and is also stored in a global variable. Use the
      tk_optionMenu procedure to create option menubuttons and their
      menus.

  

  
You create a torn-off menu by invoking the tear-off entry at the top of an
      existing menu. The default bindings will create a new menu that is a copy
      of the original menu and leave it permanently posted as a top-level
      window. The torn-off menu behaves just the same as the original menu.








DEFAULT BINDINGS


Tk automatically creates class bindings for menus that give them
    the following default behavior:



  
[1]

  
When the mouse enters a menu, the entry underneath the mouse cursor
      activates; as the mouse moves around the menu, the active entry changes to
      track the mouse.

  
[2]

  
When the mouse leaves a menu all of the entries in the menu deactivate,
      except in the special case where the mouse moves from a menu to a cascaded
      submenu.

  
[3]

  
When a button is released over a menu, the active entry (if any) is
      invoked. The menu also unposts unless it is a torn-off menu.

  
[4]

  
The Space and Return keys invoke the active entry and unpost the
    menu.

  
[5]

  
If any of the entries in a menu have letters underlined with the
      -underline option, then pressing one of the underlined letters (or
      its upper-case or lower-case equivalent) invokes that entry and unposts
      the menu.

  
[6]

  
The Escape key aborts a menu selection in progress without invoking any
      entry. It also unposts the menu unless it is a torn-off menu.

  
[7]

  
The Up and Down keys activate the next higher or lower entry in the menu.
      When one end of the menu is reached, the active entry wraps around to the
      other end.

  
[8]

  
The Left key moves to the next menu to the left. If the current menu is a
      cascaded submenu, then the submenu is unposted and the current menu entry
      becomes the cascade entry in the parent. If the current menu is a
      top-level menu posted from a menubutton, then the current menubutton is
      unposted and the next menubutton to the left is posted. Otherwise the key
      has no effect. The left-right order of menubuttons is determined by their
      stacking order: Tk assumes that the lowest menubutton (which by default is
      the first one created) is on the left.

  
[9]

  
The Right key moves to the next menu to the right. If the current entry is
      a cascade entry, then the submenu is posted and the current menu entry
      becomes the first entry in the submenu. Otherwise, if the current menu was
      posted from a menubutton, then the current menubutton is unposted and the
      next menubutton to the right is posted.




Disabled menu entries are non-responsive: they do not activate and
    they ignore mouse button presses and releases.


Several of the bindings make use of the command
    tk_menuSetFocus. It saves the current focus and sets the focus to its
    pathName argument, which is a menu widget.


The behavior of menus can be changed by defining new bindings for
    individual widgets or by redefining the class bindings.






BUGS


At present it is not possible to use the option database to
    specify values for the options to individual entries.






SEE ALSO


bind(n), menubutton(n), ttk::menubutton(n), toplevel(n)






KEYWORDS


menu, widget







  

    4.1
    Tk