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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
|
"""File selection dialog classes.
Classes:
- FileDialog
- LoadFileDialog
- SaveFileDialog
"""
from Tkinter import *
from Dialog import Dialog
import os
import fnmatch
dialogstates = {}
class FileDialog:
"""Standard file selection dialog -- no checks on selected file.
Usage:
d = FileDialog(master)
fname = d.go(dir_or_file, pattern, default, key)
if fname is None: ...canceled...
else: ...open file...
All arguments to go() are optional.
The 'key' argument specifies a key in the global dictionary
'dialogstates', which keeps track of the values for the directory
and pattern arguments, overriding the values passed in (it does
not keep track of the default argument!). If no key is specified,
the dialog keeps no memory of previous state. Note that memory is
kept even when the dialog is canceled. (All this emulates the
behavior of the Macintosh file selection dialogs.)
"""
title = "File Selection Dialog"
def __init__(self, master, title=None):
if title is None: title = self.title
self.master = master
self.directory = None
self.top = Toplevel(master)
self.top.title(title)
self.top.iconname(title)
self.botframe = Frame(self.top)
self.botframe.pack(side=BOTTOM, fill=X)
self.selection = Entry(self.top)
self.selection.pack(side=BOTTOM, fill=X)
self.selection.bind('<Return>', self.ok_event)
self.filter = Entry(self.top)
self.filter.pack(side=TOP, fill=X)
self.filter.bind('<Return>', self.filter_command)
self.midframe = Frame(self.top)
self.midframe.pack(expand=YES, fill=BOTH)
self.filesbar = Scrollbar(self.midframe)
self.filesbar.pack(side=RIGHT, fill=Y)
self.files = Listbox(self.midframe, exportselection=0,
yscrollcommand=(self.filesbar, 'set'))
self.files.pack(side=RIGHT, expand=YES, fill=BOTH)
btags = self.files.bindtags()
self.files.bindtags(btags[1:] + btags[:1])
self.files.bind('<ButtonRelease-1>', self.files_select_event)
self.files.bind('<Double-ButtonRelease-1>', self.files_double_event)
self.filesbar.config(command=(self.files, 'yview'))
self.dirsbar = Scrollbar(self.midframe)
self.dirsbar.pack(side=LEFT, fill=Y)
self.dirs = Listbox(self.midframe, exportselection=0,
yscrollcommand=(self.dirsbar, 'set'))
self.dirs.pack(side=LEFT, expand=YES, fill=BOTH)
self.dirsbar.config(command=(self.dirs, 'yview'))
btags = self.dirs.bindtags()
self.dirs.bindtags(btags[1:] + btags[:1])
self.dirs.bind('<ButtonRelease-1>', self.dirs_select_event)
self.dirs.bind('<Double-ButtonRelease-1>', self.dirs_double_event)
self.ok_button = Button(self.botframe,
text="OK",
command=self.ok_command)
self.ok_button.pack(side=LEFT)
self.filter_button = Button(self.botframe,
text="Filter",
command=self.filter_command)
self.filter_button.pack(side=LEFT, expand=YES)
self.cancel_button = Button(self.botframe,
text="Cancel",
command=self.cancel_command)
self.cancel_button.pack(side=RIGHT)
self.top.protocol('WM_DELETE_WINDOW', self.cancel_command)
# XXX Are the following okay for a general audience?
self.top.bind('<Alt-w>', self.cancel_command)
self.top.bind('<Alt-W>', self.cancel_command)
def go(self, dir_or_file=os.curdir, pattern="*", default="", key=None):
if key and dialogstates.has_key(key):
self.directory, pattern = dialogstates[key]
else:
dir_or_file = os.path.expanduser(dir_or_file)
if os.path.isdir(dir_or_file):
self.directory = dir_or_file
else:
self.directory, default = os.path.split(dir_or_file)
self.set_filter(self.directory, pattern)
self.set_selection(default)
self.filter_command()
self.selection.focus_set()
self.top.wait_visibility() # window needs to be visible for the grab
self.top.grab_set()
self.how = None
self.master.mainloop() # Exited by self.quit(how)
if key:
directory, pattern = self.get_filter()
if self.how:
directory = os.path.dirname(self.how)
dialogstates[key] = directory, pattern
self.top.destroy()
return self.how
def quit(self, how=None):
self.how = how
self.master.quit() # Exit mainloop()
def dirs_double_event(self, event):
self.filter_command()
def dirs_select_event(self, event):
dir, pat = self.get_filter()
subdir = self.dirs.get('active')
dir = os.path.normpath(os.path.join(self.directory, subdir))
self.set_filter(dir, pat)
def files_double_event(self, event):
self.ok_command()
def files_select_event(self, event):
file = self.files.get('active')
self.set_selection(file)
def ok_event(self, event):
self.ok_command()
def ok_command(self):
self.quit(self.get_selection())
def filter_command(self, event=None):
dir, pat = self.get_filter()
try:
names = os.listdir(dir)
except os.error:
self.master.bell()
return
self.directory = dir
self.set_filter(dir, pat)
names.sort()
subdirs = [os.pardir]
matchingfiles = []
for name in names:
fullname = os.path.join(dir, name)
if os.path.isdir(fullname):
subdirs.append(name)
elif fnmatch.fnmatch(name, pat):
matchingfiles.append(name)
self.dirs.delete(0, END)
for name in subdirs:
self.dirs.insert(END, name)
self.files.delete(0, END)
for name in matchingfiles:
self.files.insert(END, name)
head, tail = os.path.split(self.get_selection())
if tail == os.curdir: tail = ''
self.set_selection(tail)
def get_filter(self):
filter = self.filter.get()
filter = os.path.expanduser(filter)
if filter[-1:] == os.sep or os.path.isdir(filter):
filter = os.path.join(filter, "*")
return os.path.split(filter)
def get_selection(self):
file = self.selection.get()
file = os.path.expanduser(file)
return file
def cancel_command(self, event=None):
self.quit()
def set_filter(self, dir, pat):
if not os.path.isabs(dir):
try:
pwd = os.getcwd()
except os.error:
pwd = None
if pwd:
dir = os.path.join(pwd, dir)
dir = os.path.normpath(dir)
self.filter.delete(0, END)
self.filter.insert(END, os.path.join(dir or os.curdir, pat or "*"))
def set_selection(self, file):
self.selection.delete(0, END)
self.selection.insert(END, os.path.join(self.directory, file))
class LoadFileDialog(FileDialog):
"""File selection dialog which checks that the file exists."""
title = "Load File Selection Dialog"
def ok_command(self):
file = self.get_selection()
if not os.path.isfile(file):
self.master.bell()
else:
self.quit(file)
class SaveFileDialog(FileDialog):
"""File selection dialog which checks that the file may be created."""
title = "Save File Selection Dialog"
def ok_command(self):
file = self.get_selection()
if os.path.exists(file):
if os.path.isdir(file):
self.master.bell()
return
d = Dialog(self.top,
title="Overwrite Existing File Question",
text="Overwrite existing file %r?" % (file,),
bitmap='questhead',
default=1,
strings=("Yes", "Cancel"))
if d.num != 0:
return
else:
head, tail = os.path.split(file)
if not os.path.isdir(head):
self.master.bell()
return
self.quit(file)
def test():
"""Simple test program."""
root = Tk()
root.withdraw()
fd = LoadFileDialog(root)
loadfile = fd.go(key="test")
fd = SaveFileDialog(root)
savefile = fd.go(key="test")
print loadfile, savefile
if __name__ == '__main__':
test()
|
