# -*-mode: python; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-## $Id: Tree.py 36560 2004-07-18 06:16:08Z tim_one $## Tix Demostration Program## This sample program is structured in such a way so that it can be# executed from the Tix demo program "tixwidgets.py": it must have a# procedure called "RunSample". It should also have the "if" statment# at the end of this file so that it can be run as a standalone# program. # This file demonstrates how to use the TixTree widget to display# dynamic hierachical data (the files in the Unix file system)# import Tix, os def RunSample(w):    top = Tix.Frame(w, relief=Tix.RAISED, bd=1)    tree = Tix.Tree(top, options='separator "/"')    tree.pack(expand=1, fill=Tix.BOTH, padx=10, pady=10, side=Tix.LEFT)    tree['opencmd'] = lambda dir=None, w=tree: opendir(w, dir)     # The / directory is added in the "open" mode. The user can open it    # and then browse its subdirectories ...    adddir(tree, "/")     box = Tix.ButtonBox(w, orientation=Tix.HORIZONTAL)    box.add('ok', text='Ok', underline=0, command=w.destroy, width=6)    box.add('cancel', text='Cancel', underline=0, command=w.destroy, width=6)    box.pack(side=Tix.BOTTOM, fill=Tix.X)    top.pack(side=Tix.TOP, fill=Tix.BOTH, expand=1) def adddir(tree, dir):    if dir == '/':        text = '/'    else:        text = os.path.basename(dir)    tree.hlist.add(dir, itemtype=Tix.IMAGETEXT, text=text,                   image=tree.tk.call('tix', 'getimage', 'folder'))    try:        os.listdir(dir)        tree.setmode(dir, 'open')    except os.error:        # No read permission ?        pass # This function is called whenever the user presses the (+) indicator or# double clicks on a directory whose mode is "open". It loads the files# inside that directory into the Tree widget.## Note we didn't specify the closecmd option for the Tree widget, so it# performs the default action when the user presses the (-) indicator or# double clicks on a directory whose mode is "close": hide all of its child# entriesdef opendir(tree, dir):    entries = tree.hlist.info_children(dir)    if entries:        # We have already loaded this directory. Let's just        # show all the child entries        #        # Note: since we load the directory only once, it will not be        #       refreshed if the you add or remove files from this        #       directory.        #        for entry in entries:            tree.hlist.show_entry(entry)    files = os.listdir(dir)    for file in files:        if os.path.isdir(dir + '/' + file):            adddir(tree, dir + '/' + file)        else:            tree.hlist.add(dir + '/' + file, itemtype=Tix.IMAGETEXT, text=file,                           image=tree.tk.call('tix', 'getimage', 'file')) if __name__ == '__main__':    root = Tix.Tk()    RunSample(root)    root.mainloop()