MASH-TK(1)                                             MASH-TK(1)

          mash-tk - control visual elements of mash window

          load tk
          tk clear
          tk def button name value
          tk def ibutton name value image
          tk def menu name
          tk def item menu name value
          tk dialog title mesg default label ...
          tk dump [ name ... ]
          tk env
          tk file title dir pattern ...
          tk geom
          tk layout [ name ... ]
          tk notice message
          tk sel
          tk sget
          tk sput string
          tk string mesg
          tk taskbar string
          tk text

          Tk is a loadable builtin for mash. It provides a set of
          primitives for customizing a mash window and building fairly
          sophisticated graphical functions. It is currently imple-
          mented as a single command with a variety of subcommands.
          For the tk command to work, mash must have been started
          using wm/wmmash.  In the following descriptions, references
          to return values indicate strings put on a command's stan-
          dard output.

        Creating a Menu Bar
          The def subcommand is used to define graphical pushbuttons
          and menus. The def button and def ibutton commands are used
          to define pushbuttons labelled with text or graphical icons,
          respectively.  The name parameter is used to label buttons,
          and to layout both buttons and ibuttons.  Value is a command
          to be executed when the button is clicked, and must be
          quoted if it contains white space.  Image is the name of a
          bitmap file; it is looked for in /icon/tk, unless the name
          begins with @, which suppresses prepending /icon/tk.
          Def menu is used to name and label menu buttons, and def
          item specifies items within the corresponding pulldown
          menus. In def item, menu is a name supplied on a def menu
          subcommand, name is the label for this menu item, and value
          is a command to execute when this menu item is selected.
          All the items in a menu are simple command buttons; there is

     MASH-TK(1)                                             MASH-TK(1)

          no provision for any other kind of control, or for cascading
          The layout subcommand creates and makes visible a menu bar,
          using menus and buttons defined with def subcommands. The
          current components, if any, are removed first, so layout
          with no parameters just removes all the current buttons and
          menus from the mash window. The components are laid out from
          left to right, in the order presented in the layout subcom-
          mand. A copy of the current mash environment is made, and
          commands executed as a result of clicking buttons or select-
          ing menu items are executed in that environment.  For exam-
          ple, variables will have the values they had when the layout
          was done.
          The env subcommand can be used to make a new copy of the
          environment for use by button or menu actions.

        Displaying Popup Widgets
          The notice subcommand pops up a window containing message
          and a single button to dismiss the window. The icon dis-
          played in the window is /icons/tk/error.  No value is
          returned by notice.
          The dialog subcommand is more complex; title is used to name
          the window, and multiple buttons labelled according to the
          label parameter(s) are provided.  Default is the number of
          the button which is the default choice. The leftmost button
          is numbered 0.  When the user selects one of the buttons,
          the dialog box is popped down and the number of the button
          selected is returned.
          The file subcommand pops up a standard Inferno file selec-
          tion box.  Dir specifies the initial directory to display,
          and pattern specifies which non-directory files to include
          in the list of files. If the Cancel button in the file dia-
          log is clicked, no value is returned. If a file is selected
          and the Exit button is clicked, the full pathname of the
          file is returned, complete with final / if the file is a
          directory. Double clicking on a non-directory file in the
          list will likewise return that file's path. Double clicking
          on a directory in the list will display the contents of that
          The string subcommand pops up a small window with mesg as
          the label of a text field. Characters typed into the text
          field, up to but not including ENTER, are returned.

        Dealing With the Selection
          The sel subcommand returns whatever is currently selected.
          When typing into the shell's window, nothing is selected, so
          nothing is returned. However, if invoked via a pushbutton
          and there is a selection, it is returned.
          The sput subcommand puts string into the snarf buffer main-
          tained by the window manager, and the sget subcommand
          retrieves and returns the current contents of the snarf
          buffer. This provides a way to pass text between the shell

     MASH-TK(1)                                             MASH-TK(1)

          and other applications. The Snarf and Paste buttons on the
          popup menu associated with mouse button two can also be used
          to do this.

        Miscellaneous Tk Subcommands
          The taskbar subcommand lets you put string in the title bar
          of the mash window. The old value is returned.
          The text subcommand returns the contents of the mash window.
          The clear subcommand removes all text from the window.
          The dump subcommand returns the mash-tk commands needed to
          define the buttons and menus currently defined, and to
          recreate the currently visible set of buttons and menus, or,
          if dump has parameters, the commands needed to define the
          buttons and menus named by the parameters.
          The geom subcommand returns the position of the upper left
          corner of the mash window relative to the upper left corner
          of the Inferno screen.