source: python/trunk/Tools/pynche/PyncheWidget.py@ 1538

Last change on this file since 1538 was 2, checked in by Yuri Dario, 15 years ago

Initial import for vendor code.
  • Property svn:eol-style set to native
File size: 10.3 KB
Line 
1"""Main Pynche (Pythonically Natural Color and Hue Editor) widget.
2
3This window provides the basic decorations, primarily including the menubar.
4It is used to bring up other windows.
5"""
6
7import sys
8import os
9from Tkinter import *
10import tkMessageBox
11import tkFileDialog
12import ColorDB
13
14# Milliseconds between interrupt checks
15KEEPALIVE_TIMER = 500
16
17
18
19
20class PyncheWidget:
21 def __init__(self, version, switchboard, master=None, extrapath=[]):
22 self.__sb = switchboard
23 self.__version = version
24 self.__textwin = None
25 self.__listwin = None
26 self.__detailswin = None
27 self.__helpwin = None
28 self.__dialogstate = {}
29 modal = self.__modal = not not master
30 # If a master was given, we are running as a modal dialog servant to
31 # some other application. We rearrange our UI in this case (there's
32 # no File menu and we get `Okay' and `Cancel' buttons), and we do a
33 # grab_set() to make ourselves modal
34 if modal:
35 self.__tkroot = tkroot = Toplevel(master, class_='Pynche')
36 tkroot.grab_set()
37 tkroot.withdraw()
38 else:
39 # Is there already a default root for Tk, say because we're
40 # running under Guido's IDE? :-) Two conditions say no, either the
41 # import fails or _default_root is None.
42 tkroot = None
43 try:
44 from Tkinter import _default_root
45 tkroot = self.__tkroot = _default_root
46 except ImportError:
47 pass
48 if not tkroot:
49 tkroot = self.__tkroot = Tk(className='Pynche')
50 # but this isn't our top level widget, so make it invisible
51 tkroot.withdraw()
52 # create the menubar
53 menubar = self.__menubar = Menu(tkroot)
54 #
55 # File menu
56 #
57 filemenu = self.__filemenu = Menu(menubar, tearoff=0)
58 filemenu.add_command(label='Load palette...',
59 command=self.__load,
60 underline=0)
61 if not modal:
62 filemenu.add_command(label='Quit',
63 command=self.__quit,
64 accelerator='Alt-Q',
65 underline=0)
66 #
67 # View menu
68 #
69 views = make_view_popups(self.__sb, self.__tkroot, extrapath)
70 viewmenu = Menu(menubar, tearoff=0)
71 for v in views:
72 viewmenu.add_command(label=v.menutext(),
73 command=v.popup,
74 underline=v.underline())
75 #
76 # Help menu
77 #
78 helpmenu = Menu(menubar, name='help', tearoff=0)
79 helpmenu.add_command(label='About Pynche...',
80 command=self.__popup_about,
81 underline=0)
82 helpmenu.add_command(label='Help...',
83 command=self.__popup_usage,
84 underline=0)
85 #
86 # Tie them all together
87 #
88 menubar.add_cascade(label='File',
89 menu=filemenu,
90 underline=0)
91 menubar.add_cascade(label='View',
92 menu=viewmenu,
93 underline=0)
94 menubar.add_cascade(label='Help',
95 menu=helpmenu,
96 underline=0)
97
98 # now create the top level window
99 root = self.__root = Toplevel(tkroot, class_='Pynche', menu=menubar)
100 root.protocol('WM_DELETE_WINDOW',
101 modal and self.__bell or self.__quit)
102 root.title('Pynche %s' % version)
103 root.iconname('Pynche')
104 # Only bind accelerators for the File->Quit menu item if running as a
105 # standalone app
106 if not modal:
107 root.bind('<Alt-q>', self.__quit)
108 root.bind('<Alt-Q>', self.__quit)
109 else:
110 # We're a modal dialog so we have a new row of buttons
111 bframe = Frame(root, borderwidth=1, relief=RAISED)
112 bframe.grid(row=4, column=0, columnspan=2,
113 sticky='EW',
114 ipady=5)
115 okay = Button(bframe,
116 text='Okay',
117 command=self.__okay)
118 okay.pack(side=LEFT, expand=1)
119 cancel = Button(bframe,
120 text='Cancel',
121 command=self.__cancel)
122 cancel.pack(side=LEFT, expand=1)
123
124 def __quit(self, event=None):
125 self.__tkroot.quit()
126
127 def __bell(self, event=None):
128 self.__tkroot.bell()
129
130 def __okay(self, event=None):
131 self.__sb.withdraw_views()
132 self.__tkroot.grab_release()
133 self.__quit()
134
135 def __cancel(self, event=None):
136 self.__sb.canceled()
137 self.__okay()
138
139 def __keepalive(self):
140 # Exercise the Python interpreter regularly so keyboard interrupts get
141 # through.
142 self.__tkroot.tk.createtimerhandler(KEEPALIVE_TIMER, self.__keepalive)
143
144 def start(self):
145 if not self.__modal:
146 self.__keepalive()
147 self.__tkroot.mainloop()
148
149 def window(self):
150 return self.__root
151
152 def __popup_about(self, event=None):
153 from Main import __version__
154 tkMessageBox.showinfo('About Pynche ' + __version__,
155 '''\
156Pynche %s
157The PYthonically Natural
158Color and Hue Editor
159
160For information
161contact: Barry A. Warsaw
162email: bwarsaw@python.org''' % __version__)
163
164 def __popup_usage(self, event=None):
165 if not self.__helpwin:
166 self.__helpwin = Helpwin(self.__root, self.__quit)
167 self.__helpwin.deiconify()
168
169 def __load(self, event=None):
170 while 1:
171 idir, ifile = os.path.split(self.__sb.colordb().filename())
172 file = tkFileDialog.askopenfilename(
173 filetypes=[('Text files', '*.txt'),
174 ('All files', '*'),
175 ],
176 initialdir=idir,
177 initialfile=ifile)
178 if not file:
179 # cancel button
180 return
181 try:
182 colordb = ColorDB.get_colordb(file)
183 except IOError:
184 tkMessageBox.showerror('Read error', '''\
185Could not open file for reading:
186%s''' % file)
187 continue
188 if colordb is None:
189 tkMessageBox.showerror('Unrecognized color file type', '''\
190Unrecognized color file type in file:
191%s''' % file)
192 continue
193 break
194 self.__sb.set_colordb(colordb)
195
196 def withdraw(self):
197 self.__root.withdraw()
198
199 def deiconify(self):
200 self.__root.deiconify()
201
202
203
204
205class Helpwin:
206 def __init__(self, master, quitfunc):
207 from Main import docstring
208 self.__root = root = Toplevel(master, class_='Pynche')
209 root.protocol('WM_DELETE_WINDOW', self.__withdraw)
210 root.title('Pynche Help Window')
211 root.iconname('Pynche Help Window')
212 root.bind('<Alt-q>', quitfunc)
213 root.bind('<Alt-Q>', quitfunc)
214 root.bind('<Alt-w>', self.__withdraw)
215 root.bind('<Alt-W>', self.__withdraw)
216
217 # more elaborate help is available in the README file
218 readmefile = os.path.join(sys.path[0], 'README')
219 try:
220 fp = None
221 try:
222 fp = open(readmefile)
223 contents = fp.read()
224 # wax the last page, it contains Emacs cruft
225 i = contents.rfind('\f')
226 if i > 0:
227 contents = contents[:i].rstrip()
228 finally:
229 if fp:
230 fp.close()
231 except IOError:
232 sys.stderr.write("Couldn't open Pynche's README, "
233 'using docstring instead.\n')
234 contents = docstring()
235
236 self.__text = text = Text(root, relief=SUNKEN,
237 width=80, height=24)
238 self.__text.focus_set()
239 text.insert(0.0, contents)
240 scrollbar = Scrollbar(root)
241 scrollbar.pack(fill=Y, side=RIGHT)
242 text.pack(fill=BOTH, expand=YES)
243 text.configure(yscrollcommand=(scrollbar, 'set'))
244 scrollbar.configure(command=(text, 'yview'))
245
246 def __withdraw(self, event=None):
247 self.__root.withdraw()
248
249 def deiconify(self):
250 self.__root.deiconify()
251
252
253
254
255class PopupViewer:
256 def __init__(self, module, name, switchboard, root):
257 self.__m = module
258 self.__name = name
259 self.__sb = switchboard
260 self.__root = root
261 self.__menutext = module.ADDTOVIEW
262 # find the underline character
263 underline = module.ADDTOVIEW.find('%')
264 if underline == -1:
265 underline = 0
266 else:
267 self.__menutext = module.ADDTOVIEW.replace('%', '', 1)
268 self.__underline = underline
269 self.__window = None
270
271 def menutext(self):
272 return self.__menutext
273
274 def underline(self):
275 return self.__underline
276
277 def popup(self, event=None):
278 if not self.__window:
279 # class and module must have the same name
280 class_ = getattr(self.__m, self.__name)
281 self.__window = class_(self.__sb, self.__root)
282 self.__sb.add_view(self.__window)
283 self.__window.deiconify()
284
285 def __cmp__(self, other):
286 return cmp(self.__menutext, other.__menutext)
287
288
289def make_view_popups(switchboard, root, extrapath):
290 viewers = []
291 # where we are in the file system
292 dirs = [os.path.dirname(__file__)] + extrapath
293 for dir in dirs:
294 if dir == '':
295 dir = '.'
296 for file in os.listdir(dir):
297 if file[-9:] == 'Viewer.py':
298 name = file[:-3]
299 try:
300 module = __import__(name)
301 except ImportError:
302 # Pynche is running from inside a package, so get the
303 # module using the explicit path.
304 pkg = __import__('pynche.'+name)
305 module = getattr(pkg, name)
306 if hasattr(module, 'ADDTOVIEW') and module.ADDTOVIEW:
307 # this is an external viewer
308 v = PopupViewer(module, name, switchboard, root)
309 viewers.append(v)
310 # sort alphabetically
311 viewers.sort()
312 return viewers
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