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#!/usr/bin/env python2.5
# GtkSparql - Gtk UI to try SparQL queries against tracker.
# Copyright (C) 2009, Ivan Frade <ivan.frade@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
import gtk
import dbus
import store
import time
import completion
import completion_engine
TRACKER = 'org.freedesktop.Tracker1'
TRACKER_OBJ = '/org/freedesktop/Tracker1/Resources'
RESOURCES_IFACE = "org.freedesktop.Tracker1.Resources"
class GtkSparql:
def __init__ (self, ui):
self.ui = ui
self.store = store.QueriesStore ()
self.saved_queries_model = self.load_saved_queries ()
combo = ui.get_object ("queries_combo")
combo.set_model (self.saved_queries_model)
render = gtk.CellRendererText ()
combo.pack_start (render, True)
combo.add_attribute (render, "text", 0)
combo.connect ("changed", self.select_store_query_cb)
self.textbuffer = gtk.TextBuffer ()
self.textbuffer.set_text ("SELECT \nWHERE { \n\n}")
ui.get_object ("query_text").set_buffer (self.textbuffer)
self.completer = completion.Completer (completion_engine.TrackerCompletionEngine (),
ui.get_object ("query_text"),
ui.get_object ("main_window"))
ui.get_object ("save_button").connect ("clicked", self.save_query_cb)
ui.get_object ("run_button").connect ("clicked", self.execute_query_cb)
ui.get_object ("delete_button").connect ("clicked", self.delete_store_query_cb)
# Clean treeview columns
treeview = ui.get_object ("results_tv")
columns = treeview.get_columns ()
for c in columns:
treeview.remove_column (c)
self.connect_tracker ()
def run (self):
w = builder.get_object ("main_window")
w.connect ("destroy", gtk.main_quit)
w.show_all ()
gtk.main ()
def connect_tracker (self):
# TODO Check if the connection is valid
bus = dbus.SessionBus ()
tracker = bus.get_object (TRACKER, TRACKER_OBJ)
self.resources = dbus.Interface (tracker,
dbus_interface=RESOURCES_IFACE);
def execute_query_cb (self, widget, call=0):
label = self.ui.get_object ("info_label")
query = self.textbuffer.get_text (self.textbuffer.get_start_iter (),
self.textbuffer.get_end_iter ())
try:
start = time.time ()
result = self.resources.SparqlQuery (query)
end = time.time ()
label.set_text ("Query took %f sec." % (end-start))
self.set_results_in_treeview (result)
except dbus.exceptions.DBusException, e:
if ("org.freedesktop.DBus.Error.ServiceUnknown" in str(e) and call == 0):
self.connect_tracker ()
self.execute_query_cb (widget, 1)
else:
label.set_text (str(e).partition(':')[2])
def set_results_in_treeview (self, result_set):
if (len (result_set) < 1):
return None
columns = len (result_set[0])
params = tuple (columns * [str])
store = gtk.ListStore (*params)
self.configure_tree_view (columns)
counter = 0
for r in result_set:
if (counter < 500):
counter += 1
store.append (r)
else:
label = self.ui.get_object ("info_label")
current_text = label.get_text ()
label.set_text (current_text +
"(More than 500 results. Showing only first 500)")
break
self.ui.get_object ("results_tv").set_model (store)
def configure_tree_view (self, columns):
"""
Add of remove columns in the current treeview to have exactly 'columns'
"""
treeview = self.ui.get_object ("results_tv")
current_columns = treeview.get_columns ()
if (len (current_columns) == columns):
return
if (len (current_columns) > columns):
for i in range (columns, len (current_columns)):
treeview.remove_column (current_columns [i])
# Add columns. Is the only chance at this moment
for i in range (len (current_columns), columns):
render = gtk.CellRendererText()
column = gtk.TreeViewColumn ("%d" % (i),
render,
text=i) # primera columna de datos
treeview.append_column (column)
def save_query_cb (self, widget):
dialog = gtk.Dialog ("Save query...",
None,
gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
(gtk.STOCK_CANCEL, gtk.RESPONSE_REJECT,
gtk.STOCK_OK, gtk.RESPONSE_ACCEPT))
vbox = dialog.get_content_area ()
query = self.textbuffer.get_text (self.textbuffer.get_start_iter (),
self.textbuffer.get_end_iter ())
dialog_query_label = gtk.Label (query)
vbox.pack_start (dialog_query_label)
dialog_name_entry = gtk.Entry ()
vbox.pack_start (dialog_name_entry)
vbox.show_all ()
# Disable 'ok' button unless there is a name
dialog.set_response_sensitive (gtk.RESPONSE_ACCEPT, False)
def validate_entry (entry, dialog):
dialog.set_response_sensitive (gtk.RESPONSE_ACCEPT, len (entry.get_text ()) > 0)
dialog_name_entry.connect ("changed", validate_entry, dialog)
response = dialog.run ()
if (response == gtk.RESPONSE_ACCEPT):
name = dialog_name_entry.get_text ()
self.save_query (name, query)
dialog.destroy ()
def select_store_query_cb (self, combobox):
it = combobox.get_active_iter ()
selected = combobox.get_model ().get (it, 1)[0]
self.textbuffer.set_text (selected)
def delete_store_query_cb (self, button):
combo = self.ui.get_object ("queries_combo")
it = combo.get_active_iter ()
name = self.saved_queries_model.get (it, 0)[0]
self.store.delete_query (name)
self.saved_queries_model.remove (it)
combo.set_active (0)
def load_saved_queries (self):
queries_model = gtk.ListStore (str, str)
queries = self.store.get_all_queries ()
for row in queries:
queries_model.append (row)
return queries_model
def save_query (self, name, value):
self.store.save_query (name, value)
it = self.saved_queries_model.append ((name, value))
self.ui.get_object ("queries_combo").set_active_iter (it)
if __name__ == "__main__":
builder = gtk.Builder ()
builder.add_from_file ("gtk-sparql.ui")
app = GtkSparql (builder)
app.run ()
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