diff options
Diffstat (limited to 'jni/ruby/ext/tk/sample/demos-en/rmt')
| -rw-r--r-- | jni/ruby/ext/tk/sample/demos-en/rmt | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/jni/ruby/ext/tk/sample/demos-en/rmt b/jni/ruby/ext/tk/sample/demos-en/rmt new file mode 100644 index 0000000..dcfb328 --- /dev/null +++ b/jni/ruby/ext/tk/sample/demos-en/rmt @@ -0,0 +1,268 @@ +#!/usr/bin/env ruby + +# 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. + +require 'tk' + +class Rmt + def initialize(parent=nil) + win = self + + unless parent + parent = TkRoot.new + end + root = TkWinfo.toplevel(parent) + root.minsize(1,1) + + # The instance 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. + @app = 'local' + @mode = 'Ruby' + + # The instance variable below keeps track of whether we're in the + # middle of executing a command entered via the text. + @executing = 0 + + # The instance variable below keeps track of the last command executed, + # so it can be re-executed in response to !! commands. + @lastCommand = "" + + # Create menu bar. Arrange to recreate all the information in the + # applications sub-menu whenever it is cascaded to. + + TkFrame.new(root, 'relief'=>'raised', 'bd'=>2) {|f| + pack('side'=>'top', 'fill'=>'x') + TkMenubutton.new(f, 'text'=>'File', 'underline'=>0) {|mb| + TkMenu.new(mb) {|mf| + mb.menu(mf) + TkMenu.new(mf) {|ma| + postcommand proc{win.fillAppsMenu ma} + mf.add('cascade', 'label'=>'Select Application', + 'menu'=>ma, 'underline'=>0) + } + add('command', 'label'=>'Quit', + 'command'=>proc{root.destroy}, 'underline'=>0) + } + pack('side'=>'left') + } + } + + # Create text window and scrollbar. + + @txt = TkText.new(root, 'relief'=>'sunken', 'bd'=>2, 'setgrid'=>true) { + yscrollbar(TkScrollbar.new(root){pack('side'=>'right', 'fill'=>'y')}) + pack('side'=>'left') + } + + @promptEnd = TkTextMark.new(@txt, 'insert') + + # 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). + + @txt.bindtags([@txt, TkText, root, 'all']) + @txt.bind('Return', proc{ + @txt.set_insert('end - 1c') + @txt.insert('insert', "\n") + win.invoke + Tk.callback_break + }) + @txt.bind('Delete', proc{ + begin + @txt.tag_remove('sel', 'sel.first', @promptEnd) + rescue + end + if @txt.tag_nextrange('sel', '1.0', 'end') == [] + if @txt.compare('insert', '<', @promptEnd) + Tk.callback_break + end + end + }) + @txt.bind('BackSpace', proc{ + begin + @txt.tag_remove('sel', 'sel.first', @promptEnd) + rescue + end + if @txt.tag_nextrange('sel', '1.0', 'end') == [] + if @txt.compare('insert', '<', @promptEnd) + Tk.callback_break + end + end + }) + @txt.bind('Control-d', proc{ + if @txt.compare('insert', '<', @promptEnd) + Tk.callback_break + end + }) + @txt.bind('Control-k', proc{ + if @txt.compare('insert', '<', @promptEnd) + @txt.set_insert(@promptEnd) + end + }) + @txt.bind('Control-t', proc{ + if @txt.compare('insert', '<', @promptEnd) + Tk.callback_break + end + }) + @txt.bind('Meta-d', proc{ + if @txt.compare('insert', '<', @promptEnd) + Tk.callback_break + end + }) + @txt.bind('Meta-BackSpace', proc{ + if @txt.compare('insert', '<=', @promptEnd) + Tk.callback_break + end + }) + @txt.bind('Control-h', proc{ + if @txt.compare('insert', '<=', @promptEnd) + Tk.callback_break + end + }) + + @txt.tag_configure('bold', 'font'=>['Courier', 12, 'bold']) + + @app = Tk.appname('rmt') + if (@app =~ /^rmt(.*)$/) + root.title("Tk Remote Controller#{$1}") + root.iconname("Tk Remote#{$1}") + end + prompt + @txt.focus + #@app = TkWinfo.appname(TkRoot.new) + end + + def tkTextInsert(w,s) + return if s == "" + begin + if w.compare('sel.first','<=','insert') \ + && w.compare('sel.last','>=','insert') + w.tag_remove('sel', 'sel.first', @promptEnd) + w.delete('sel.first', 'sel.last') + end + rescue + end + w.insert('insert', s) + w.see('insert') + end + + # The method below is used to print out a prompt at the + # insertion point (which should be at the beginning of a line + # right now). + + def prompt + @txt.insert('insert', "#{@app}: ") + @promptEnd.set('insert') + @promptEnd.gravity = 'left' + @txt.tag_add('bold', "#{@promptEnd.path} linestart", @promptEnd) + end + + # The method below executes a command (it takes everything on the + # current line after the prompt and either sends it to the remote + # application or executes it locally, depending on "app". + + def invoke + cmd = @txt.get(@promptEnd, 'insert') + @executing += 1 + case (@mode) + when 'Tcl' + if Tk.info('complete', cmd) + if (cmd == "!!\n") + cmd = @lastCommand + else + @lastCommand = cmd + end + begin + msg = Tk.appsend(@app, false, cmd) + rescue + msg = "Error: #{$!}" + end + @txt.insert('insert', msg + "\n") if msg != "" + prompt + @promptEnd.set('insert') + end + + when 'Ruby' + if (cmd == "!!\n") + cmd = @lastCommand + end + complete = true + begin + eval("proc{#{cmd}}") + rescue + complete = false + end + if complete + @lastCommand = cmd + begin +# msg = Tk.appsend(@app, false, +# 'ruby', +# '"(' + cmd.gsub(/[][$"]/, '\\\\\&') + ').to_s"') + msg = Tk.rb_appsend(@app, false, cmd) + rescue + msg = "Error: #{$!}" + end + @txt.insert('insert', msg + "\n") if msg != "" + prompt + @promptEnd.set('insert') + end + end + + @executing -= 1 + @txt.yview_pickplace('insert') + end + + # The following method 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). + + def newApp(appName, mode) + @app = appName + @mode = mode + if @executing == 0 + @promptEnd.gravity = 'right' + @txt.delete("#{@promptEnd.path} linestart", @promptEnd) + @txt.insert(@promptEnd, "#{appName}: ") + @txt.tag_add('bold', "#{@promptEnd.path} linestart", @promptEnd) + @promptEnd.gravity = 'left' + end + end + + # The method below will fill in the applications sub-menu with a list + # of all the applications that currently exist. + + def fillAppsMenu(menu) + win = self + begin + menu.delete(0,'last') + rescue + end + TkWinfo.interps.sort.each{|ip| + begin + if Tk.appsend(ip, false, 'info commands ruby') == "" + mode = 'Tcl' + else + mode = 'Ruby' + end + menu.add('command', 'label'=>format("%s (#{mode}/Tk)", ip), + 'command'=>proc{win.newApp ip, mode}) + rescue + menu.add('command', 'label'=>format("%s (unknown Tk)", ip), + 'command'=>proc{win.newApp ip, mode}, 'state'=>'disabled') + end + } + menu.add('command', 'label'=>format("local (Ruby/Tk)"), + 'command'=>proc{win.newApp 'local', 'Ruby'}) + end +end + +Rmt.new + +Tk.mainloop |