1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
#! /usr/bin/env python
# A Python program implementing rmt, an application for remotely
# controlling other Tk applications.
# Cf. Ousterhout, Tcl and the Tk Toolkit, Figs. 27.5-8, pp. 273-276.
# Note that because of forward references in the original, we
# sometimes delay bindings until after the corresponding procedure is
# defined. We also introduce names for some unnamed code blocks in
# the original because of restrictions on lambda forms in Python.
# XXX This should be written in a more Python-like style!!!
from Tkinter import *
import sys
# 1. Create basic application structure: menu bar on top of
# text widget, scrollbar on right.
root = Tk()
tk = root.tk
mBar = Frame(root, relief=RAISED, borderwidth=2)
mBar.pack(fill=X)
f = Frame(root)
f.pack(expand=1, fill=BOTH)
s = Scrollbar(f, relief=FLAT)
s.pack(side=RIGHT, fill=Y)
t = Text(f, relief=RAISED, borderwidth=2, yscrollcommand=s.set, setgrid=1)
t.pack(side=LEFT, fill=BOTH, expand=1)
t.tag_config('bold', font='-Adobe-Courier-Bold-R-Normal-*-120-*')
s['command'] = t.yview
root.title('Tk Remote Controller')
root.iconname('Tk Remote')
# 2. Create menu button and menus.
file = Menubutton(mBar, text='File', underline=0)
file.pack(side=LEFT)
file_m = Menu(file)
file['menu'] = file_m
file_m_apps = Menu(file_m, tearoff=0)
file_m.add_cascade(label='Select Application', underline=0,
menu=file_m_apps)
file_m.add_command(label='Quit', underline=0, command=sys.exit)
# 3. Create bindings for text widget to allow commands to be
# entered and information to be selected. New characters
# can only be added at the end of the text (can't ever move
# insertion point).
def single1(e):
x = e.x
y = e.y
t.setvar('tk_priv(selectMode)', 'char')
t.mark_set('anchor', At(x, y))
# Should focus W
t.bind('<1>', single1)
def double1(e):
x = e.x
y = e.y
t.setvar('tk_priv(selectMode)', 'word')
t.tk_textSelectTo(At(x, y))
t.bind('<Double-1>', double1)
def triple1(e):
x = e.x
y = e.y
t.setvar('tk_priv(selectMode)', 'line')
t.tk_textSelectTo(At(x, y))
t.bind('<Triple-1>', triple1)
def returnkey(e):
t.insert(AtInsert(), '\n')
invoke()
t.bind('<Return>', returnkey)
def controlv(e):
t.insert(AtInsert(), t.selection_get())
t.yview_pickplace(AtInsert())
if t.index(AtInsert())[-2:] == '.0':
invoke()
t.bind('<Control-v>', controlv)
# 4. Procedure to backspace over one character, as long as
# the character isn't part of the prompt.
def backspace(e):
if t.index('promptEnd') != t.index('insert - 1 char'):
t.delete('insert - 1 char', AtInsert())
t.yview_pickplace(AtInsert())
t.bind('<BackSpace>', backspace)
t.bind('<Control-h>', backspace)
t.bind('<Delete>', backspace)
# 5. Procedure that's invoked when return is typed: if
# there's not yet a complete command (e.g. braces are open)
# then do nothing. Otherwise, execute command (locally or
# remotely), output the result or error message, and issue
# a new prompt.
def invoke():
cmd = t.get('promptEnd + 1 char', AtInsert())
if t.getboolean(tk.call('info', 'complete', cmd)): # XXX
if app == root.winfo_name():
msg = tk.call('eval', cmd) # XXX
else:
msg = t.send(app, cmd)
if msg:
t.insert(AtInsert(), msg + '\n')
prompt()
t.yview_pickplace(AtInsert())
def prompt():
t.insert(AtInsert(), app + ': ')
t.mark_set('promptEnd', 'insert - 1 char')
t.tag_add('bold', 'insert linestart', 'promptEnd')
# 6. Procedure to select a new application. Also changes
# the prompt on the current command line to reflect the new
# name.
def newApp(appName):
global app
app = appName
t.delete('promptEnd linestart', 'promptEnd')
t.insert('promptEnd', appName + ':')
t.tag_add('bold', 'promptEnd linestart', 'promptEnd')
def fillAppsMenu():
file_m_apps.add('command')
file_m_apps.delete(0, 'last')
names = root.winfo_interps()
names = list(names) # convert tuple to list
names.sort()
for name in names:
try:
root.send(name, 'winfo name .')
except TclError:
# Inoperative window -- ignore it
pass
else:
file_m_apps.add_command(
label=name,
command=lambda name=name: newApp(name))
file_m_apps['postcommand'] = fillAppsMenu
mBar.tk_menuBar(file)
# 7. Miscellaneous initialization.
app = root.winfo_name()
prompt()
t.focus()
root.mainloop()
|
