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- #!/usr/skunk/bin/wish -f
- #
- # This script implements a simple remote-control mechanism for
- # Tk applications. It allows you to select an application and
- # then type commands to that application.
-
- wm title . "Tk Remote Controller"
- wm iconname . "Tk Remote"
- wm minsize . 1 1
-
- # The global variable below keeps track of the remote application
- # that we're sending to. If it's an empty string then we execute
- # the commands locally.
-
- set app "local"
-
- # The global variable below keeps track of whether we're in the
- # middle of executing a command entered via the text.
-
- set executing 0
-
- # The global variable below keeps track of the last command executed,
- # so it can be re-executed in response to !! commands.
-
- set lastCommand ""
-
- # Create menu bar. Arrange to recreate all the information in the
- # applications sub-menu whenever it is cascaded to.
-
- frame .menu -relief raised -bd 2
- pack .menu -side top -fill x
- menubutton .menu.file -text "File" -menu .menu.file.m -underline 0
- menu .menu.file.m
- .menu.file.m add cascade -label "Select Application" -command fillAppsMenu \
- -menu .menu.file.m.apps -underline 0
- .menu.file.m add command -label "Quit" -command "destroy ." -underline 0
- menu .menu.file.m.apps
- pack .menu.file -side left
- tk_menuBar .menu .menu.file
-
- # Create text window and scrollbar, and set up bindings for text
- # window to foward commands to a remote application.
-
- text .t -relief raised -bd 2 -yscrollcommand ".s set" -setgrid true
- scrollbar .s -relief flat -command ".t yview"
- pack .s -side right -fill both
- pack .t -side left
-
- bind .t <1> {
- set tk_priv(selectMode) char
- %W mark set anchor @%x,%y
- if {[lindex [%W config -state] 4] == "normal"} {focus %W}
- }
- bind .t <Double-1> {
- set tk_priv(selectMode) word
- tk_textSelectTo %W @%x,%y
- }
- bind .t <Triple-1> {
- set tk_priv(selectMode) line
- tk_textSelectTo %W @%x,%y
- }
- bind .t <Control-u> {
- .t delete {promptEnd + 1 char} insert
- .t yview -pickplace insert
- }
- bind .t <Return> {.t insert insert \n; invoke}
- bind .t <BackSpace> backspace
- bind .t <Delete> backspace
- bind .t <Control-h> backspace
- bind .t <Control-v> {
- .t insert insert [selection get]
- .t yview -pickplace insert
- if [string match *.0 [.t index insert]] {
- invoke
- }
- }
-
- .t tag configure bold -font *-Courier-Bold-R-Normal-*-120-*
-
- # The procedure below is used to print out a prompt at the
- # insertion point (which should be at the beginning of a line
- # right now).
-
- proc prompt {} {
- global app
- .t insert insert "$app: "
- .t mark set promptEnd {insert - 1 char}
- .t tag add bold {promptEnd linestart} promptEnd
- }
-
- # The procedure below executes a command (it takes everything on the
- # current line after the prompt and either sends it to the remote
- # application or executes it locally, depending on "app".
-
- proc invoke {} {
- global app executing lastCommand
- set cmd [.t get promptEnd+1c insert]
- incr executing 1
- if [info complete $cmd] {
- if {$cmd == "!!\n"} {
- set cmd $lastCommand
- } else {
- set lastCommand $cmd
- }
- if {$app == "local"} {
- set result [catch [list uplevel #0 $cmd] msg]
- } else {
- set result [catch [list send $app $cmd] msg]
- }
- if {$result != 0} {
- .t insert insert "Error: $msg\n"
- } else {
- if {$msg != ""} {
- .t insert insert $msg\n
- }
- }
- prompt
- .t mark set promptEnd insert-1c
- }
- incr executing -1
- .t yview -pickplace insert
- }
-
- # The following procedure is invoked to change the application that
- # we're talking to. It also updates the prompt for the current
- # command, unless we're in the middle of executing a command from
- # the text item (in which case a new prompt is about to be output
- # so there's no need to change the old one).
-
- proc newApp appName {
- global app executing
- set app $appName
- if !$executing {
- .t delete "promptEnd linestart" promptEnd
- .t insert promptEnd "$appName:"
- .t tag add bold "promptEnd linestart" promptEnd
- }
- return {}
- }
-
- # The following procedure below handles backspaces, being careful not
- # to backspace over the prompt.
-
- proc backspace {} {
- if {[.t index promptEnd] != [.t index {insert - 1 char}]} {
- .t delete insert-1c insert
- .t yview -pickplace insert
- }
- }
-
- # The procedure below will fill in the applications sub-menu with a list
- # of all the applications that currently exist.
-
- proc fillAppsMenu {} {
- catch {.menu.file.m.apps delete 0 last}
- foreach i [lsort [winfo interps]] {
- .menu.file.m.apps add command -label $i -command [list newApp $i]
- }
- .menu.file.m.apps add command -label local -command {newApp local}
- }
-
- set app [winfo name .]
- prompt
- focus .t
-