| """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 key in dialogstates: |
| 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() |
