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On 10/14/2009 06:52 PM, Daniel B. Thurman wrote: [snip!] Apologies. It appears that there is something wrong with email-deliveries and I am not getting every posting, so I will have to reply to certain individuals that I have not received directly into my mailbox. (I am looking directly at the archives for those I have missed) ==================================== David Nečas <yeti physics muni cz> (1) The signal is called "row-expanded". [Dan] Thank you! But how did you find this signal? (2) You have the text in another column instead of directly in the expander column? [Dan] I have posted the experimental code & hopefully the post is accepted. ==================================== Shaun McCance <shaunm gnome org> (1) If you want to populate data on-demand like this, you're probably going to have to write your own GtkTreeModel. [Dan] Ugh. I will try to use the stock and see if I can get this to work first! ==================================== Holger Berndt <berndth gmx de> (sent directly to me) The way I do that is to add a single dummy child (with a text like "Loading..."). That makes the top level entry expandable. When the user expands the item, he gets feedback right away by seeing the "Loading..." entry, while the code populates the model on the fly, and finally removes the dummy entry. Others (e.g. Nautilus list view) seem to do it similarly. [Dan- All below] The problem I have is: how do I capture the signal when the
row is expanded? I posted a follow up on this and it seems
that the key is "row-has-child-toggled", but this does not
seem to work:
self.treeview.connect('row-has-child-toggled', self.on_row_activated)
TypeError: <gtk.TreeView object at 0xb7b9ab6c (GtkTreeView at
0x8df5080)>: unknown signal name: row-has-child-toggled
I have, however tried:
self.treeview.connect('row-activated', self.on_row_activated)
and this works, except that the row has to be mouse
double-clicked, which is not what I want.
I sure wish there is a Python-GTK code somewhere
that I could peruse to resolve my many issues!
Since the code I have is experimental, I include it
in the following, so that it is open to critique and
may be of benefit to others following the same
pathway:
==================================
[code]
#!/usr/bin/env python
import os, stat, sys, time
import pygtk
pygtk.require('2.0')
import gtk
DEBUG=True
RECURSE=1
SEP=' '
DEFAULT_PATH='~/Desktop/'
class FileLister:
# column_names = ['Files', 'Size', 'Mode', 'Last Changed', 'Path']
column_names = ['Files']
# Close the window and quit
def delete_event(self, widget, event, data=""
gtk.main_quit()
return False
def __init__(self, path=None):
cell_data_funcs = (
None,
self.file_size,
self.file_mode,
self.file_last_changed,
self.file_path)
# Create a new window
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.set_title("FileLister")
self.window.set_size_request(600, 400)
self.window.connect("delete_event", self.delete_event)
# TreeView
self.treestore = gtk.TreeStore(str, gtk.gdk.Pixbuf, int, bool, str)
self.treeview = gtk.TreeView(self.treestore)
# TreeView Options
self.treeview.set_level_indentation(0)
self.treeview.set_show_expanders(True)
# self.treeview.set_hover_expand(True)
# self.treeview.set_search_column(0)
# self.treeview.set_reorderable(True)
# TreeViewColumns
self.tvcolumn = [None] * len(self.column_names)
cellpb = gtk.CellRendererPixbuf()
self.tvcolumn[0] = gtk.TreeViewColumn(self.column_names[0], cellpb)
self.tvcolumn[0].set_cell_data_func(cellpb, self.file_pixbuf)
cell = gtk.CellRendererText()
self.tvcolumn[0].pack_start(cell, False)
self.tvcolumn[0].set_cell_data_func(cell, self.file_name)
self.treeview.append_column(self.tvcolumn[0])
# Append more TreeView columns, if available
for n in range(1, len(self.column_names)):
cell = gtk.CellRendererText()
self.tvcolumn[n] = gtk.TreeViewColumn(self.column_names[n],
cell)
if n == 1:
cell.set_property('xalign', 0.0)
self.tvcolumn[n].set_cell_data_func(cell, cell_data_funcs[n])
self.treeview.append_column(self.tvcolumn[n])
# Signals
# self.treeview.connect('row-activated', self.on_row_activated)
''' FOLLOWING DOES NOT WORK '''
self.treeview.connect('row-has-child-toggled',
self.on_row_activated)
# Populate TreeView with initial files
self.path = os.path.expanduser(DEFAULT_PATH)
self.dir_walk(path=self.path, recurse=RECURSE)
# Add scrolled Window
self.scrolledwindow = gtk.ScrolledWindow()
self.scrolledwindow.add(self.treeview)
self.window.add(self.scrolledwindow)
# Display the window
self.window.show_all()
# Populate TreeStore with directory listing
def dir_walk(self, path, parent=None, recurse=0):
filestat = os.stat(path)
if not stat.S_ISDIR(filestat.st_mode):
self.debug("File : "+path)
return self.treestore
for f in os.listdir(path):
rec=recurse
filename = os.path.join(path, f)
fdata = os.stat(filename)
is_folder = stat.S_ISDIR(fdata.st_mode)
if is_folder:
fType="Directory"
hdr="%s: %s" % (fType, filename)
else:
fType="File"
hdr="%s : %s" % (fType, filename)
self.debug(hdr)
img = gtk.icon_theme_get_default().load_icon(
"folder" if is_folder else "document",
gtk.ICON_SIZE_MENU, 0)
try:
ts = self.treestore.append(parent, [f,img,fdata.st_size,
is_folder, path])
except Exception, error:
''' Note: exceptions occurs on certain files on
Fedora-11 mounted NTFS filesystem <Needs investigating...> '''
extradata="Filename=%s\n%sFiletype=%s\n%sparent=%s,
[f=%s, img=%s, size=%s, is_folder=%s, path=%s]" % (filename, SEP, fType,
SEP, parent, f, img, fdata.st_size, is_folder, path)
self.dump_traceback(extradata)
continue
if is_folder and rec > 0:
rec=rec-1
self.dir_walk(path=filename, parent=ts, recurse=rec)
return self.treestore
def on_row_activated(self, treeview, path, column):
model = treeview.get_model()
iter = model.get_iter(path)
filename = os.path.join(model.get_value(iter, 4),
model.get_value(iter, 0))
#self.debug("File : "+filename)
ts = self.dir_walk(filename, parent=iter, recurse=1)
treeview.set_model(ts)
return
def file_pixbuf(self, column, cell, model, iter):
filename = os.path.join(model.get_value(iter, 4),
model.get_value(iter, 0))
filestat = os.stat(filename)
if stat.S_ISDIR(filestat.st_mode):
pb = gtk.icon_theme_get_default().load_icon("folder",
gtk.ICON_SIZE_MENU, 0)
else:
pb = gtk.icon_theme_get_default().load_icon("document",
gtk.ICON_SIZE_MENU, 0)
cell.set_property('pixbuf', pb)
return
def file_name(self, column, cell, model, iter):
cell.set_property('text', model.get_value(iter, 0))
return
def file_size(self, column, cell, model, iter):
filename = os.path.join(model.get_value(iter, 4),
model.get_value(iter, 0))
filestat = os.stat(filename)
cell.set_property('text', filestat.st_size)
return
def file_mode(self, column, cell, model, iter):
filename = os.path.join(model.get_value(iter, 4),
model.get_value(iter, 0))
filestat = os.stat(filename)
cell.set_property('text', oct(stat.S_IMODE(filestat.st_mode)))
return
def file_last_changed(self, column, cell, model, iter):
filename = os.path.join(model.get_value(iter, 4),
model.get_value(iter, 0))
filestat = os.stat(filename)
cell.set_property('text', time.ctime(filestat.st_mtime))
return
def file_path(self, column, cell, model, iter):
filename = os.path.join(model.get_value(iter, 4),
model.get_value(iter, 0))
cell.set_property('text', filename)
return
def debug(self, string):
if DEBUG:
print 'DEBUG: %s' % string
def dump_traceback(self, extradata=None):
import traceback
etb = traceback.extract_tb(sys.exc_info()[2])
traceback = 'Traceback:\n'
for tub in etb:
f, l, m, c = tub # file, lineno, function, codeline
traceback += ' '+('File: %(a)s, line %(b)s,
in %(c)s\n') % {'a': f, 'b': l, 'c': m}
traceback += ' %s \n' % c
traceback += ' %s: %s' %
(sys.exc_info()[0], sys.exc_info()[1]) #etype, evalue
print "ERROR: Exception: %s\n%s%s" % (traceback, SEP,
extradata)
def main():
gtk.main()
if __name__ == "__main__":
myApp = FileLister()
main()
[/code]
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