MASH-TK(1) MASH-TK(1)
NAME
mash-tk - control visual elements of mash window
SYNOPSIS
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
DESCRIPTION
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
menus.
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
directory.
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.
SOURCE
/appl/cmd/mash/tk.b
SEE ALSO
mash(1)