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7fc0bf8247
- When dragging the mouse in either listbox, the *first* entry clicked on is selected rather than the last (but the last one is highlighted). This is done by changing the bindtags so that our binding is executed after the default binding (which sets the 'active' index to the last item selected), and using 'active' instead of 'anchor' as the index to ask for.
270 lines
7.1 KiB
Python
Executable File
270 lines
7.1 KiB
Python
Executable File
"""File selection dialog classes.
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Classes:
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- FileDialog
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- LoadFileDialog
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- SaveFileDialog
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"""
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from Tkinter import *
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from Dialog import Dialog
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import os
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import fnmatch
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dialogstates = {}
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class FileDialog:
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"""Standard file selection dialog -- no checks on selected file.
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Usage:
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d = FileDialog(master)
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file = d.go(dir_or_file, pattern, default, key)
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if file is None: ...canceled...
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else: ...open file...
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All arguments to go() are optional.
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The 'key' argument specifies a key in the global dictionary
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'dialogstates', which keeps track of the values for the directory
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and pattern arguments, overriding the values passed in (it does
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not keep track of the default argument!). If no key is specified,
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the dialog keeps no memory of previous state. Note that memory is
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kept even when the dialog is cancelled. (All this emulates the
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behavior of the Macintosh file selection dialogs.)
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"""
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title = "File Selection Dialog"
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def __init__(self, master, title=None):
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if title is None: title = self.title
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self.master = master
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self.directory = None
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self.top = Toplevel(master)
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self.top.title(title)
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self.top.iconname(title)
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self.botframe = Frame(self.top)
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self.botframe.pack(side=BOTTOM, fill=X)
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self.selection = Entry(self.top)
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self.selection.pack(side=BOTTOM, fill=X)
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self.selection.bind('<Return>', self.ok_event)
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self.filter = Entry(self.top)
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self.filter.pack(side=TOP, fill=X)
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self.filter.bind('<Return>', self.filter_command)
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self.midframe = Frame(self.top)
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self.midframe.pack(expand=YES, fill=BOTH)
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self.filesbar = Scrollbar(self.midframe)
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self.filesbar.pack(side=RIGHT, fill=Y)
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self.files = Listbox(self.midframe, exportselection=0,
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yscrollcommand=(self.filesbar, 'set'))
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self.files.pack(side=RIGHT, expand=YES, fill=BOTH)
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btags = self.files.bindtags()
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self.files.bindtags(btags[1:] + btags[:1])
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self.files.bind('<ButtonRelease-1>', self.files_select_event)
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self.files.bind('<Double-ButtonRelease-1>', self.files_double_event)
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self.filesbar.config(command=(self.files, 'yview'))
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self.dirsbar = Scrollbar(self.midframe)
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self.dirsbar.pack(side=LEFT, fill=Y)
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self.dirs = Listbox(self.midframe, exportselection=0,
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yscrollcommand=(self.dirsbar, 'set'))
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self.dirs.pack(side=LEFT, expand=YES, fill=BOTH)
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self.dirsbar.config(command=(self.dirs, 'yview'))
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btags = self.dirs.bindtags()
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self.dirs.bindtags(btags[1:] + btags[:1])
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self.dirs.bind('<ButtonRelease-1>', self.dirs_select_event)
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self.dirs.bind('<Double-ButtonRelease-1>', self.dirs_double_event)
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self.ok_button = Button(self.botframe,
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text="OK",
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command=self.ok_command)
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self.ok_button.pack(side=LEFT)
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self.filter_button = Button(self.botframe,
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text="Filter",
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command=self.filter_command)
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self.filter_button.pack(side=LEFT, expand=YES)
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self.cancel_button = Button(self.botframe,
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text="Cancel",
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command=self.cancel_command)
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self.cancel_button.pack(side=RIGHT)
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self.top.protocol('WM_DELETE_WINDOW', self.cancel_command)
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# XXX Are the following okay for a general audience?
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self.top.bind('<Alt-w>', self.cancel_command)
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self.top.bind('<Alt-W>', self.cancel_command)
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def go(self, dir_or_file=os.curdir, pattern="*", default="", key=None):
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if key and dialogstates.has_key(key):
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self.directory, pattern = dialogstates[key]
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else:
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dir_or_file = os.path.expanduser(dir_or_file)
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if os.path.isdir(dir_or_file):
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self.directory = dir_or_file
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else:
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self.directory, default = os.path.split(dir_or_file)
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self.set_filter(self.directory, pattern)
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self.set_selection(default)
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self.filter_command()
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self.selection.focus_set()
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self.top.grab_set()
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self.how = None
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self.master.mainloop() # Exited by self.quit(how)
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if key: dialogstates[key] = self.get_filter()
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self.top.destroy()
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return self.how
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def quit(self, how=None):
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self.how = how
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self.master.quit() # Exit mainloop()
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def dirs_double_event(self, event):
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self.filter_command()
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def dirs_select_event(self, event):
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dir, pat = self.get_filter()
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subdir = self.dirs.get('active')
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dir = os.path.normpath(os.path.join(self.directory, subdir))
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self.set_filter(dir, pat)
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def files_double_event(self, event):
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self.ok_command()
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def files_select_event(self, event):
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file = self.files.get('active')
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self.set_selection(file)
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def ok_event(self, event):
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self.ok_command()
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def ok_command(self):
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self.quit(self.get_selection())
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def filter_command(self, event=None):
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dir, pat = self.get_filter()
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try:
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names = os.listdir(dir)
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except os.error:
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self.master.bell()
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return
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self.directory = dir
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self.set_filter(dir, pat)
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names.sort()
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subdirs = [os.pardir]
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matchingfiles = []
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for name in names:
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fullname = os.path.join(dir, name)
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if os.path.isdir(fullname):
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subdirs.append(name)
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elif fnmatch.fnmatch(name, pat):
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matchingfiles.append(name)
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self.dirs.delete(0, END)
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for name in subdirs:
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self.dirs.insert(END, name)
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self.files.delete(0, END)
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for name in matchingfiles:
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self.files.insert(END, name)
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head, tail = os.path.split(self.get_selection())
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if tail == os.curdir: tail = ''
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self.set_selection(tail)
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def get_filter(self):
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filter = self.filter.get()
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filter = os.path.expanduser(filter)
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if filter[-1:] == os.sep or os.path.isdir(filter):
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filter = os.path.join(filter, "*")
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return os.path.split(filter)
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def get_selection(self):
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file = self.selection.get()
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file = os.path.expanduser(file)
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return file
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def cancel_command(self, event=None):
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self.quit()
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def set_filter(self, dir, pat):
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if not os.path.isabs(dir):
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try:
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pwd = os.getcwd()
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except os.error:
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pwd = None
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if pwd:
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dir = os.path.join(pwd, dir)
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dir = os.path.normpath(dir)
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self.filter.delete(0, END)
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self.filter.insert(END, os.path.join(dir or os.curdir, pat or "*"))
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def set_selection(self, file):
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self.selection.delete(0, END)
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self.selection.insert(END, os.path.join(self.directory, file))
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class LoadFileDialog(FileDialog):
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"""File selection dialog which checks that the file exists."""
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title = "Load File Selection Dialog"
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def ok_command(self):
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file = self.get_selection()
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if not os.path.isfile(file):
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self.master.bell()
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else:
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self.quit(file)
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class SaveFileDialog(FileDialog):
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"""File selection dialog which checks that the file may be created."""
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title = "Save File Selection Dialog"
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def ok_command(self):
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file = self.get_selection()
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if os.path.exists(file):
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if os.path.isdir(file):
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self.master.bell()
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return
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d = Dialog(self.top,
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title="Overwrite Existing File Question",
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text="Overwrite existing file %s?" % `file`,
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bitmap='questhead',
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default=1,
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strings=("Yes", "Cancel"))
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if d.num != 0:
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return
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else:
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head, tail = os.path.split(file)
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if not os.path.isdir(head):
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self.master.bell()
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return
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self.quit(file)
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def test():
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"""Simple test program."""
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root = Tk()
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root.withdraw()
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fd = LoadFileDialog(root)
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loadfile = fd.go(key="test")
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fd = SaveFileDialog(root)
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savefile = fd.go(key="test")
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print loadfile, savefile
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if __name__ == '__main__':
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test()
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