On 10/15/2009 09:36 AM, Holger Berndt wrote:
> Hi Daniel,
>
> On Mi, 14.10.2009 18:52, Daniel B. Thurman wrote:
>
>
>> I need
>> the expanders so that when I expand the directory
>> in question, I would then trigger a call to add more
>> children, and so on.
>>
> 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.
>
> Holger
>
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=None):
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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