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Diffstat (limited to 'library/demos/rmt')
| -rw-r--r-- | library/demos/rmt | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/library/demos/rmt b/library/demos/rmt new file mode 100644 index 0000000..9310475 --- /dev/null +++ b/library/demos/rmt @@ -0,0 +1,205 @@ +#!/bin/sh +# the next line restarts using wish \ +exec wish "$0" "$@" + +# rmt -- +# 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. +# +# SCCS: @(#) rmt 1.10 96/06/24 16:42:38 + +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" \ + -menu .menu.file.m.apps -underline 0 +.menu.file.m add command -label "Quit" -command "destroy ." -underline 0 +menu .menu.file.m.apps -postcommand fillAppsMenu +pack .menu.file -side left + +# Create text window and scrollbar. + +text .t -relief sunken -bd 2 -yscrollcommand ".s set" -setgrid true +scrollbar .s -command ".t yview" +pack .s -side right -fill both +pack .t -side left + +# Create a binding to forward commands to the target application, +# plus modify many of the built-in bindings so that only information +# in the current command can be deleted (can still set the cursor +# earlier in the text and select and insert; just can't delete). + +bindtags .t {.t Text . all} +bind .t <Return> { + .t mark set insert {end - 1c} + .t insert insert \n + invoke + break +} +bind .t <Delete> { + catch {.t tag remove sel sel.first promptEnd} + if {[.t tag nextrange sel 1.0 end] == ""} { + if [.t compare insert < promptEnd] { + break + } + } +} +bind .t <BackSpace> { + catch {.t tag remove sel sel.first promptEnd} + if {[.t tag nextrange sel 1.0 end] == ""} { + if [.t compare insert <= promptEnd] { + break + } + } +} +bind .t <Control-d> { + if [.t compare insert < promptEnd] { + break + } +} +bind .t <Control-k> { + if [.t compare insert < promptEnd] { + .t mark set insert promptEnd + } +} +bind .t <Control-t> { + if [.t compare insert < promptEnd] { + break + } +} +bind .t <Meta-d> { + if [.t compare insert < promptEnd] { + break + } +} +bind .t <Meta-BackSpace> { + if [.t compare insert <= promptEnd] { + break + } +} +bind .t <Control-h> { + if [.t compare insert <= promptEnd] { + break + } +} +auto_load tkTextInsert +proc tkTextInsert {w s} { + if {$s == ""} { + return + } + catch { + if {[$w compare sel.first <= insert] + && [$w compare sel.last >= insert]} { + $w tag remove sel sel.first promptEnd + $w delete sel.first sel.last + } + } + $w insert insert $s + $w see insert +} + +.t tag configure bold -font {Courier 12 bold} + +# The procedure below is used to print out a prompt at the +# insertion point (which should be at the beginning of a line +# right now). + +proc prompt {} { + global app + .t insert insert "$app: " + .t mark set promptEnd {insert} + .t mark gravity promptEnd left + .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 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 + } + 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 mark gravity promptEnd right + .t delete "promptEnd linestart" promptEnd + .t insert promptEnd "$appName: " + .t tag add bold "promptEnd linestart" promptEnd + .t mark gravity promptEnd left + } + return {} +} + +# 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 |