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  4. menubutton(n)

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





NAME


menubutton - Create and manipulate 'menubutton' pop-up menu
    indicator widgets






SYNOPSIS


menubutton pathName ?options?






STANDARD OPTIONS


-activebackground	-disabledforeground	-padx
-activeforeground	-font	-pady
-anchor	-foreground	-relief
-background	-highlightbackground	-takefocus
-bitmap	-highlightcolor	-text
-borderwidth	-highlightthickness	-textvariable
-cursor	-image	-underline
-compound	-justify	-wraplength


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






WIDGET-SPECIFIC OPTIONS


Command-Line Name:	-direction
Database Name:	direction
Database Class:	Height



  

  
Specifies where the menu is going to be popup up. above tries to
      pop the menu above the menubutton. below tries to pop the menu
      below the menubutton. left tries to pop the menu to the left of the
      menubutton. right tries to pop the menu to the right of the menu
      button. flush pops the menu directly over the menubutton. In the
      case of above or below, the direction will be reversed if
      the menu would show offscreen.






Command-Line Name:	-height
Database Name:	height
Database Class:	Height



  

  
Specifies a desired height for the menubutton. If an image or bitmap is
      being displayed in the menubutton then the value is in screen units (i.e.
      any of the forms acceptable to Tk_GetPixels); for text it is in
      lines of text. If this option is not specified, the menubutton's desired
      height is computed from the size of the image or bitmap or text being
      displayed in it.






Command-Line Name:	-indicatoron
Database Name:	indicatorOn
Database Class:	IndicatorOn



  

  
The value must be a proper boolean value. If it is true then a small
      indicator rectangle will be displayed on the right side of the menubutton
      and the default menu bindings will treat this as an option menubutton. If
      false then no indicator will be displayed.






Command-Line Name:	-menu
Database Name:	menu
Database Class:	MenuName



  

  
Specifies the path name of the menu associated with this menubutton. The
      menu must be a child of the menubutton.






Command-Line Name:	-state
Database Name:	state
Database Class:	State



  

  
Specifies one of three states for the menubutton: normal,
      active, or disabled. In normal state the menubutton is
      displayed using the foreground and background options. The
      active state is typically used when the pointer is over the menubutton. In
      active state the menubutton is displayed using the
      -activeforeground and -activebackground options. Disabled
      state means that the menubutton should be insensitive: the default
      bindings will refuse to activate the widget and will ignore mouse button
      presses. In this state the -disabledforeground and
      -background options determine how the button is displayed.






Command-Line Name:	-width
Database Name:	width
Database Class:	Width



  

  
Specifies a desired width for the menubutton. If an image or bitmap is
      being displayed in the menubutton then the value is in screen units (i.e.
      any of the forms acceptable to Tk_GetPixels); for text it is in
      characters. If this option is not specified, the menubutton's desired
      width is computed from the size of the image or bitmap or text being
      displayed in it.
    
    

    

  








INTRODUCTION


The menubutton command creates a new window (given by the
    pathName argument) and makes it into a menubutton widget. Additional
    options, described above, may be specified on the command line or in the
    option database to configure aspects of the menubutton such as its colors,
    font, text, and initial relief. The menubutton 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 menubutton is a widget that displays a textual string, bitmap,
    or image and is associated with a menu widget. If text is displayed, it must
    all be in a single font, but it can occupy multiple lines on the screen (if
    it contains newlines or if wrapping occurs because of the -wraplength
    option) and one of the characters may optionally be underlined using the
    -underline option. In normal usage, pressing mouse button 1 over the
    menubutton causes the associated menu to be posted just underneath the
    menubutton. If the mouse is moved over the menu before releasing the mouse
    button, the button release causes the underlying menu entry to be invoked.
    When the button is released, the menu is unposted.


Menubuttons are used to construct a tk_optionMenu, which is
    the preferred mechanism for allowing a user to select one item from a list
    on Mac OS X.


Menubuttons were also typically organized into groups called menu
    bars that allow scanning: if the mouse button is pressed over one menubutton
    (causing it to post its menu) and the mouse is moved over another menubutton
    in the same menu bar without releasing the mouse button, then the menu of
    the first menubutton is unposted and the menu of the new menubutton is
    posted instead. This use is deprecated in favor of setting a
    menu directly as a menubar; see the toplevel's -menu
    option for how to do that.


There are several interactions between menubuttons and menus; see
    the menu manual entry for information on various menu configurations,
    such as pulldown menus and option menus.






WIDGET COMMAND


The menubutton 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.
  The following commands are possible for menubutton widgets:


  

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

  

  
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 menubutton command.








DEFAULT BINDINGS


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



  
[1]

  
A menubutton activates whenever the mouse passes over it and deactivates
      whenever the mouse leaves it.

  
[2]

  
Pressing mouse button 1 over a menubutton posts the menubutton: its relief
      changes to raised and its associated menu is posted under the menubutton.
      If the mouse is dragged down into the menu with the button still down, and
      if the mouse button is then released over an entry in the menu, the
      menubutton is unposted and the menu entry is invoked.

  
[3]

  
If button 1 is pressed over a menubutton and then released over that
      menubutton, the menubutton stays posted: you can still move the mouse over
      the menu and click button 1 on an entry to invoke it. Once a menu entry
      has been invoked, the menubutton unposts itself.

  
[4]

  
If button 1 is pressed over a menubutton and then dragged over some other
      menubutton, the original menubutton unposts itself and the new menubutton
      posts.

  
[5]

  
If button 1 is pressed over a menubutton and released outside any
      menubutton or menu, the menubutton unposts without invoking any menu
      entry.

  
[6]

  
When a menubutton is posted, its associated menu claims the input focus to
      allow keyboard traversal of the menu and its submenus. See the menu
      manual entry for details on these bindings.

  
[7]

  
If the -underline option has been specified for a menubutton then
      keyboard traversal may be used to post the menubutton: Alt+x, where
      x is the underlined character (or its lower-case or upper-case
      equivalent), may be typed in any window under the menubutton's toplevel to
      post the menubutton.

  
[8]

  
The F10 key may be typed in any window to post the first menubutton under
      its toplevel window that is not disabled.

  
[9]

  
If a menubutton has the input focus, the space and return keys post the
      menubutton.




If the menubutton's state is disabled then none of the
    above actions occur: the menubutton is completely non-responsive.


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






SEE ALSO


ttk::menubutton(n), menu(n)






KEYWORDS


menubutton, widget







  

    4.0
    Tk