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_exit
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FreeBSD/Linux/UNIX General Commands Manual
Hypertext Man Pages
menubutton
 
menubutton(n)		     Tk Built-In Commands		 menubutton(n)



NAME
       menubutton - Create and manipulate menubutton widgets

SYNOPSIS
       menubutton   pathName   ?options?    -activebackground	-disabledfore-
       ground -padx    -activeforeground   -font     -pady    -anchor	-fore-
       ground	 -relief    -background    -highlightbackground     -takefocus
       -bitmap	 -highlightcolor     -text     -borderwidth   -highlightthick-
       ness -textvariable    -cursor   -image	 -underline    -compound -jus-
       tify  -wraplength

WIDGET-SPECIFIC OPTIONS
       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.  Spec-
       ifies 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  isn't  specified, the menubutton's
       desired height is computed from the size of the image or bitmap or text
       being  displayed  in it.  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  dis-
       played.	 Specifies  the  path  name  of  the menu associated with this
       menubutton.  The menu must be a child of the menubutton.  Specifies one
       of  three  states for the menubutton:  normal, active, or disabled.  In
       normal state the menubutton is displayed using the foreground and back-
       ground 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.  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 isn't 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	under-
       lined using the underline option.  In normal usage, pressing mouse but-
       ton 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 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.

       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 path-
       Name.  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:

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

       pathName configure ?option? ?value option value ...?
	      Query  or modify the configuration options of the widget.  If no
	      option is specified, returns a list describing all of the avail-
	      able  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 sub-
	      menus.  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  menubut-
	      ton'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 isn't 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.


KEYWORDS
       menubutton, widget



Tk				      4.0			 menubutton(n)
=208415
+1158
(69)