| """File selection dialog classes. |
| |
| Classes: |
| |
| - FileDialog |
| - LoadFileDialog |
| - SaveFileDialog |
| |
| XXX Bugs: |
| |
| - The fields are not labeled |
| - Default doesn't have absolute pathname |
| - Each FileDialog instance can be used only once |
| - There is no easy way for an application to add widgets of its own |
| |
| """ |
| |
| from Tkinter import * |
| from Dialog import Dialog |
| |
| ANCHOR = 'anchor' |
| |
| import os |
| import fnmatch |
| |
| |
| class FileDialog: |
| |
| """Standard file selection dialog -- no checks on selected file. |
| |
| Usage: |
| |
| d = FileDialog(master) |
| file = d.go(directory, pattern, default) |
| if file is None: ...canceled... |
| |
| """ |
| |
| title = "File Selection Dialog" |
| |
| def __init__(self, master): |
| self.master = master |
| self.directory = None |
| self.top = Toplevel(master) |
| self.top.title(self.title) |
| self.filter = Entry(self.top) |
| self.filter.pack(fill=X) |
| self.filter.bind('<Return>', self.filter_command) |
| self.midframe = Frame(self.top) |
| self.midframe.pack(expand=YES, fill=BOTH) |
| self.dirs = Listbox(self.midframe, exportselection=0) |
| self.dirs.pack(side=LEFT, expand=YES, fill=BOTH) |
| self.dirs.bind('<ButtonRelease-1>', self.dirs_select_event) |
| self.dirs.bind('<Double-ButtonRelease-1>', self.dirs_double_event) |
| self.files = Listbox(self.midframe, exportselection=0) |
| self.files.pack(side=RIGHT, expand=YES, fill=BOTH) |
| self.files.bind('<ButtonRelease-1>', self.files_select_event) |
| self.files.bind('<Double-ButtonRelease-1>', self.files_double_event) |
| self.selection = Entry(self.top) |
| self.selection.pack(fill=X) |
| self.selection.bind('<Return>', self.ok_event) |
| self.botframe = Frame(self.top) |
| self.botframe.pack(fill=X) |
| 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) |
| |
| def go(self, directory=os.curdir, pattern="*", default=""): |
| self.directory = directory |
| self.set_filter(directory, pattern) |
| self.filter_command() |
| self.set_selection(default) |
| self.selection.focus_set() |
| self.top.grab_set() |
| try: |
| self.master.mainloop() |
| except SystemExit, how: |
| self.top.destroy() |
| return how |
| |
| def dirs_double_event(self, event): |
| ## self.dirs_select_event(event) |
| self.filter_command() |
| |
| def dirs_select_event(self, event): |
| dir, pat = self.get_filter() |
| subdir = self.dirs.get(ANCHOR) |
| dir = os.path.normpath(os.path.join(self.directory, subdir)) |
| self.set_filter(dir, pat) |
| |
| def files_double_event(self, event): |
| ## self.files_select_event(event) |
| ## self.master.update_idletasks() |
| self.ok_command() |
| |
| def files_select_event(self, event): |
| file = self.files.get(ANCHOR) |
| self.set_selection(file) |
| |
| def ok_event(self, event): |
| self.ok_command() |
| |
| def ok_command(self): |
| raise SystemExit, self.selection.get() |
| |
| 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.selection.get()) |
| if tail == os.curdir: tail = '' |
| self.set_selection(tail) |
| |
| def get_filter(self): |
| filter = self.filter.get() |
| if filter[-1:] == os.sep: |
| filter = filter + "*" |
| return os.path.split(filter) |
| |
| def cancel_command(self): |
| raise SystemExit, None |
| |
| def set_filter(self, dir, pat): |
| 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.selection.get() |
| if not os.path.isfile(file): |
| self.master.bell() |
| else: |
| raise SystemExit, 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.selection.get() |
| if os.path.exists(file): |
| if os.path.isdir(file): |
| self.master.bell() |
| return |
| d = Dialog(self.master, |
| title="Overwrite Existing File Question", |
| text="Overwrite existing file %s?" % `file`, |
| bitmap='questhead', |
| default=0, |
| strings=("Yes", "Cancel")) |
| if d.num != 0: file = None |
| else: |
| head, tail = os.path.split(file) |
| if not os.path.isdir(head): |
| self.master.bell() |
| return |
| raise SystemExit, file |
| |
| |
| def test(): |
| """Simple test program.""" |
| root = Tk() |
| root.withdraw() |
| fd = LoadFileDialog(root) |
| loadfile = fd.go() |
| fd = SaveFileDialog(root) |
| savefile = fd.go() |
| print loadfile, savefile |
| |
| |
| if __name__ == '__main__': |
| test() |