20 _moduleLogger = logging.getLogger("gonvert_glade")
22 gettext.bindtextdomain('gonvert', '/usr/share/locale')
23 gettext.textdomain('gonvert')
27 def change_menu_label(widgets, labelname, newtext):
28 item_label = widgets.get_widget(labelname).get_children()[0]
29 item_label.set_text(newtext)
32 class Gonvert(object):
35 os.path.join(os.path.dirname(__file__), "gonvert.glade"),
36 os.path.join(os.path.dirname(__file__), "../data/gonvert.glade"),
37 os.path.join(os.path.dirname(__file__), "../lib/gonvert.glade"),
38 '/usr/lib/gonvert/gonvert.glade',
42 self._unitDataInCategory = None
43 self._calcsuppress = False
44 self._unit_sort_direction = False
45 self._value_sort_direction = False
46 self._units_sort_direction = False
48 self._find_result = [] # empty find result list
49 self._find_count = 0 # default to find result number zero
51 self._selected_category = '' # preset to no selected category
52 self._selected_units = {} # empty dictionary for later use
54 #check to see if glade file is in current directory (user must be
55 # running from download untar directory)
56 for gladePath in self._glade_files:
57 if os.path.isfile(gladePath):
58 homepath = os.path.dirname(gladePath)
59 pixmapspath = "/".join((homepath, "pixmaps"))
60 widgets = gtk.glade.XML(gladePath)
65 self._mainWindow = widgets.get_widget('mainWindow')
67 change_menu_label(widgets, 'fileMenuItem', _('File'))
68 change_menu_label(widgets, 'exitMenuItem', _('Exit'))
69 change_menu_label(widgets, 'toolsMenuItem', _('Tools'))
70 change_menu_label(widgets, 'clearSelectionMenuItem', _('Clear selections'))
71 change_menu_label(widgets, 'writeUnitsMenuItem', _('Write Units'))
72 change_menu_label(widgets, 'helpMenuItem', _('Help'))
73 change_menu_label(widgets, 'aboutMenuItem', _('About'))
74 change_menu_label(widgets, 'findButton', _('Find'))
76 self._shortlistcheck = widgets.get_widget('shortlistcheck')
77 self._toggleShortList = widgets.get_widget('toggleShortList')
79 self._categoryView = widgets.get_widget('categoryView')
81 self._unitsView = widgets.get_widget('unitsView')
82 self._unitsView_selection = self._unitsView.get_selection()
84 self._unitName = widgets.get_widget('unitName')
85 self._unitValue = widgets.get_widget('unitValue')
86 self._previousUnitName = widgets.get_widget('previousUnitName')
87 self._previousUnitValue = widgets.get_widget('previousUnitValue')
88 messagebox = widgets.get_widget('msgbox')
89 messageboxtext = widgets.get_widget('msgboxtext')
91 self._unitSymbol = widgets.get_widget('unitSymbol')
92 self._previousUnitSymbol = widgets.get_widget('previousUnitSymbol')
94 self._unitDescription = widgets.get_widget('unitDescription')
96 self._findEntry = widgets.get_widget('findEntry')
97 self._findLabel = widgets.get_widget('findLabel')
98 findButton = widgets.get_widget('findButton')
99 ToolTips = gtk.Tooltips()
100 ToolTips.set_tip(findButton, _(u'Find unit (F6)'))
102 #insert a self._categoryColumnumn into the units list even though the heading will not be seen
103 renderer = gtk.CellRendererText()
104 self._unitNameColumn = gtk.TreeViewColumn(_('Unit Name'), renderer)
105 self._unitNameColumn.set_property('resizable', 1)
106 self._unitNameColumn.add_attribute(renderer, 'text', 0)
107 self._unitNameColumn.set_clickable(True)
108 self._unitNameColumn.connect("clicked", self._on_click_unit_column)
109 self._unitsView.append_column(self._unitNameColumn)
111 self._unitValueColumn = gtk.TreeViewColumn(_('Value'), renderer)
112 self._unitValueColumn.set_property('resizable', 1)
113 self._unitValueColumn.add_attribute(renderer, 'text', 1)
114 self._unitValueColumn.set_clickable(True)
115 self._unitValueColumn.connect("clicked", self._on_click_unit_column)
116 self._unitsView.append_column(self._unitValueColumn)
118 self._unitSymbolColumn = gtk.TreeViewColumn(_('Units'), renderer)
119 self._unitSymbolColumn.set_property('resizable', 1)
120 self._unitSymbolColumn.add_attribute(renderer, 'text', 2)
121 self._unitSymbolColumn.set_clickable(True)
122 self._unitSymbolColumn.connect("clicked", self._on_click_unit_column)
123 self._unitsView.append_column(self._unitSymbolColumn)
125 #Insert a column into the category list even though the heading will not be seen
126 renderer = gtk.CellRendererText()
127 self._categoryColumn = gtk.TreeViewColumn('Title', renderer)
128 self._categoryColumn.set_property('resizable', 1)
129 self._categoryColumn.add_attribute(renderer, 'text', 0)
130 self._categoryView.append_column(self._categoryColumn)
132 self._categoryModel = gtk.ListStore(gobject.TYPE_STRING)
133 self._categoryView.set_model(self._categoryModel)
134 #colourize each row differently for easier reading
135 self._categoryView.set_property('rules_hint', 1)
137 #Populate the catagories list
138 for key in unit_data.UNIT_CATEGORIES:
139 iter = self._categoryModel.append()
140 self._categoryModel.set(iter, 0, key)
142 #--------- connections to GUI ----------------
144 "on_exit_menu_activate": self._on_user_exit,
145 "on_main_window_destroy": self._on_user_exit,
146 "on_categoryView_select_row": self._on_click_category,
147 "on_unitsView__on_click_unit_column": self._on_click_unit_column,
148 "on_unitValue_changed": self._on_unit_value_changed,
149 "on_previousUnitValue_changed": self._on_previous_unit_value_changed,
150 "on_writeUnitsMenuItem_activate": self._on_user_write_units,
151 "on_findButton_clicked": self._on_user_find_units,
152 "on_findEntry_key_press_event": self._on_find_key_press,
153 "on_findEntry_changed": self._on_findEntry_changed,
154 "on_aboutMenuItem_activate": self._on_about_clicked,
155 "on_messagebox_ok_clicked": self.messagebox_ok_clicked,
156 "on_clearSelectionMenuItem_activate": self._on_user_clear_selections,
157 "on_unitsView_cursor_changed": self._on_click_unit,
158 "on_unitsView_button_released": self._on_button_released,
159 "on_shortlistcheck_toggled": self._on_shortlist_changed,
160 "on_toggleShortList_activate": self._on_edit_shortlist,
162 widgets.signal_autoconnect(dic)
164 self._mainWindow.set_title('gonvert- %s - Unit Conversion Utility' % constants.__version__)
165 iconPath = pixmapspath + '/gonvert.png'
166 if os.path.exists(iconPath):
167 self._mainWindow.set_icon(gtk.gdk.pixbuf_new_from_file(iconPath))
169 _moduleLogger.warn("Error: Could not find gonvert icon: %s" % iconPath)
171 #Restore window size from previously saved settings if it exists and is valid.
172 windowDatPath = "/".join((constants._data_path_, "window.dat"))
173 if os.path.exists(windowDatPath):
174 #Retrieving previous window settings from ~/.gonvert/window.dat
175 saved_window = pickle.load(open(windowDatPath, "r"))
176 #If the 'size' has been stored, then extract size from saved_window.
177 if 'size' in saved_window:
178 a, b = saved_window['size']
179 self._mainWindow.resize(a, b)
181 #Maximize if no previous size was found
182 #self._mainWindow.maximize()
185 #Maximize if no previous window.dat file was found
186 #self._mainWindow.maximize()
189 #Restore selections from previously saved settings if it exists and is valid.
190 historical_catergory_found = False
191 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
192 if os.path.exists(selectionsDatPath):
193 #Retrieving previous selections from ~/.gonvert/selections.dat
194 selections = pickle.load(open(selectionsDatPath, 'r'))
195 #Restoring previous selections.
196 #If the 'selected_unts' has been stored, then extract self._selected_units from selections.
197 if 'selected_units' in selections:
198 self._selected_units = selections['selected_units']
199 #Make sure that the 'self._selected_category' has been stored.
200 if 'selected_category' in selections:
201 #Match an available category to the previously selected category.
202 for counter in range(len(unit_data.UNIT_CATEGORIES)):
203 if selections['selected_category'] == unit_data.UNIT_CATEGORIES[counter]:
204 # Restore the previously selected category.
205 self._categoryView.set_cursor(counter, self._categoryColumn, False)
206 self._categoryView.grab_focus()
207 historical_catergory_found = True
209 if not historical_catergory_found:
210 print "Couldn't find saved category, using default."
211 #If historical records were not kept then default to
212 # put the focus on the first category
213 self._categoryView.set_cursor(0, self._categoryColumn, False)
214 self._categoryView.grab_focus()
218 def _on_shortlist_changed(self, a):
219 raise NotImplementedError("%s" % self._shortlistcheck.get_active())
221 def _on_edit_shortlist(self, a):
222 raise NotImplementedError("%s" % self._toggleShortList.get_active())
224 def _on_user_clear_selections(self, a):
225 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
226 os.remove(selectionsDatPath)
227 self._selected_units = {}
229 def _on_user_exit(self, a):
231 This routine saves the selections to a file, and
232 should therefore only be called when exiting the program.
234 Update selections dictionary which consists of the following keys:
235 'self._selected_category': full name of selected category
236 'self._selected_units': self._selected_units dictionary which contains:
237 [categoryname: #1 displayed unit, #2 displayed unit]
239 #Determine the contents of the selected category row
240 selected, iter = self._categoryView.get_selection().get_selected()
241 self._selected_category = self._categoryModel.get_value(iter, 0)
244 'selected_category': self._selected_category,
245 'selected_units': self._selected_units
247 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
248 pickle.dump(selections, open(selectionsDatPath, 'w'))
250 #Get last size of app and save it
252 'size': self._mainWindow.get_size()
254 windowDatPath = "/".join((constants._data_path_, "window.dat"))
255 pickle.dump(window_settings, open(windowDatPath, 'w'))
260 def _on_findEntry_changed(self, a):
261 #Clear out find results since the user wants to look for something new
262 self._find_result = [] #empty find result list
263 self._find_count = 0 #default to find result number zero
264 self._findLabel.set_text('') #clear result
266 def _on_find_key_press(self, a, b):
267 #Check if the key pressed was an ASCII key
269 #Check if the key pressed was the 'Enter' key
270 if ord(b.string[0]) == 13:
271 #Execute the find units function
272 self._on_user_find_units(1)
274 def _on_about_clicked(self, a):
275 dlg = gtk.AboutDialog()
276 dlg.set_name(constants.__pretty_app_name__)
277 dlg.set_version("%s-%d" % (constants.__version__, constants.__build__))
278 dlg.set_copyright("Copyright 2009 - GPL")
280 dlg.set_website("http://unihedron.com/projects/gonvert/gonvert.php")
281 dlg.set_authors(["Anthony Tekatch <anthony@unihedron.com>", "Ed Page <edpage@byu.net>"])
285 def messagebox_ok_clicked(self, a):
288 def _on_user_find_units(self, a):
289 #check if 'new find' or 'last find' or 'next-find'
291 #new-find = run the find algorithm which also selects the first found unit
292 # = self._find_count = 0 and self._find_result = []
294 #last-find = restart from top again
295 # = self._find_count = len(self._find_result)
297 #next-find = continue to next found location
298 # = self._find_count = 0 and len(self._find_result)>0
301 if len(self._find_result) == 0:
302 find_string = string.lower(string.strip(self._findEntry.get_text()))
303 #Make sure that a valid find string has been requested
304 if len(find_string)>0:
305 found_a_unit = 0 #reset the 'found-a-unit' flag
307 for category in unit_data.UNIT_CATEGORIES:
308 units = unit_data.UNIT_DESCRIPTIONS[category].keys()
310 del units[0] # do not display .base_unit description key
313 if string.find(string.lower(unit), find_string) >= 0:
314 found_a_unit = 1 #indicate that a unit was found
315 #print "'", find_string, "'", " found at category = ", category, " unit = ", unit
316 self._find_result.append((category, unit, cat_no, unit_no))
320 if found_a_unit == 1:
321 #select the first found unit
323 #check if next find is in a new category (prevent category changes when unnecessary
324 if self._selected_category != self._find_result[self._find_count][0]:
325 self._categoryView.set_cursor(self._find_result[0][2], self._categoryColumn, False)
326 self._unitsView.set_cursor(self._find_result[0][3], self._unitNameColumn, True)
327 if len(self._find_result)>1:
328 self._findLabel.set_text(('Press Find for next unit. '+ str(len(self._find_result))+' result(s).'))
330 self._findLabel.set_text('Text not found') #Display error
331 else: #must be next-find or last-find
333 if self._find_count == len(self._find_result)-1:
336 self._categoryView.set_cursor(self._find_result[self._find_count][2], self._categoryColumn, False)
337 self._unitsView.set_cursor(self._find_result[self._find_count][3], self._unitNameColumn, True)
338 else: #must be next-find
339 self._find_count = self._find_count+1
340 #check if next find is in a new category (prevent category changes when unnecessary
341 if self._selected_category != self._find_result[self._find_count][0]:
342 self._categoryView.set_cursor(self._find_result[self._find_count][2], self._categoryColumn, False)
343 self._unitsView.set_cursor(self._find_result[self._find_count][3], self._unitNameColumn, True)
345 def _on_click_unit_column(self, col):
347 Sort the contents of the col when the user clicks on the title.
349 #Determine which column requires sorting
350 if col is self._unitNameColumn:
351 selectedUnitColumn = 0
352 self._unitNameColumn.set_sort_indicator(True)
353 self._unitValueColumn.set_sort_indicator(False)
354 self._unitSymbolColumn.set_sort_indicator(False)
355 self._unitNameColumn.set_sort_order(not self._unit_sort_direction)
356 elif col is self._unitValueColumn:
357 selectedUnitColumn = 1
358 self._unitNameColumn.set_sort_indicator(False)
359 self._unitValueColumn.set_sort_indicator(True)
360 self._unitSymbolColumn.set_sort_indicator(False)
361 self._unitValueColumn.set_sort_order(not self._value_sort_direction)
362 elif col is self._unitSymbolColumn:
363 selectedUnitColumn = 2
364 self._unitNameColumn.set_sort_indicator(False)
365 self._unitValueColumn.set_sort_indicator(False)
366 self._unitSymbolColumn.set_sort_indicator(True)
367 self._unitSymbolColumn.set_sort_order(not self._units_sort_direction)
369 assert False, "Unknown column: %s" % (col.get_title(), )
371 #declare a spot to hold the sorted list
374 #point to the first row
375 iter = self._unitModel.get_iter_first()
379 #grab all text from columns for sorting
381 #get the text from each column
382 unit_text = self._unitModel.get_value(iter, 0)
383 units_text = self._unitModel.get_value(iter, 2)
385 #do not bother sorting if the value column is empty
386 if self._unitModel.get_value(iter, 1) == '' and selectedUnitColumn == 1:
389 #special sorting exceptions for ascii values (instead of float values)
390 if self._selected_category == "Computer Numbers":
391 value_text = self._unitModel.get_value(iter, 1)
393 if self._unitModel.get_value(iter, 1) == None or self._unitModel.get_value(iter, 1) == '':
396 value_text = float(self._unitModel.get_value(iter, 1))
398 if selectedUnitColumn == 0:
399 sorted_list.append((unit_text, value_text, units_text))
400 elif selectedUnitColumn == 1:
401 sorted_list.append((value_text, unit_text, units_text))
403 sorted_list.append((units_text, value_text, unit_text))
405 #point to the next row in the self._unitModel
406 iter = self._unitModel.iter_next(iter)
409 #check if no calculations have been made yet (don't bother sorting)
413 if selectedUnitColumn == 0:
414 if not self._unit_sort_direction:
415 sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(x), string.lower(y)))
416 self._unit_sort_direction = True
418 sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(y), string.lower(x)))
419 self._unit_sort_direction = False
420 elif selectedUnitColumn == 1:
422 if not self._value_sort_direction:
423 self._value_sort_direction = True
425 sorted_list.reverse()
426 self._value_sort_direction = False
428 if not self._units_sort_direction:
429 sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(x), string.lower(y)))
430 self._units_sort_direction = True
432 sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(y), string.lower(x)))
433 self._units_sort_direction = False
435 #Clear out the previous list of units
436 self._unitModel = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING, gobject.TYPE_STRING)
437 self._unitsView.set_model(self._unitModel)
439 #colourize each row differently for easier reading
440 self._unitsView.set_property('rules_hint', 1)
442 #Clear out the description
443 text_model = gtk.TextBuffer(None)
444 self._unitDescription.set_buffer(text_model)
446 if selectedUnitColumn == 0:
447 for unit, value, units in sorted_list:
448 iter = self._unitModel.append()
449 self._unitModel.set(iter, 0, unit, 1, str(value), 2, units)
450 elif selectedUnitColumn == 1:
451 for value, unit, units in sorted_list:
452 iter = self._unitModel.append()
453 self._unitModel.set(iter, 0, unit, 1, str(value), 2, units)
455 for units, value, unit in sorted_list:
456 iter = self._unitModel.append()
457 self._unitModel.set(iter, 0, unit, 1, str(value), 2, units)
460 def _on_click_category(self, row):
461 #Clear out the previous list of units
462 self._unitModel = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING, gobject.TYPE_STRING)
463 self._unitsView.set_model(self._unitModel)
465 #Colourize each row alternately for easier reading
466 self._unitsView.set_property('rules_hint', 1)
468 #Clear out the description
469 text_model = gtk.TextBuffer(None)
470 self._unitDescription.set_buffer(text_model)
472 #Determine the contents of the selected category row
473 selected, iter = row.get_selection().get_selected()
475 self._selected_category = self._categoryModel.get_value(iter, 0)
477 self._unit_sort_direction = False
478 self._value_sort_direction = False
479 self._units_sort_direction = False
480 self._unitNameColumn.set_sort_indicator(False)
481 self._unitValueColumn.set_sort_indicator(False)
482 self._unitSymbolColumn.set_sort_indicator(False)
484 self._unitDataInCategory = unit_data.UNIT_DESCRIPTIONS[selected.get_value(iter, 0)]
485 keys = self._unitDataInCategory.keys()
487 del keys[0] # do not display .base_unit description key
489 #Fill up the units descriptions and clear the value cells
491 iter = self._unitModel.append()
492 self._unitModel.set(iter, 0, key, 1, '', 2, self._unitDataInCategory[key][1])
494 self._unitName.set_text('')
495 self._unitValue.set_text('')
496 self._previousUnitName.set_text('')
497 self._previousUnitValue.set_text('')
498 self._unitSymbol.set_text('')
499 self._previousUnitSymbol.set_text('')
503 def restore_units(self):
504 # Restore the previous historical settings of previously selected units in this newly selected category
505 #Since category has just been clicked, the list will be sorted already.
506 if self._selected_category in self._selected_units:
507 if self._selected_units[self._selected_category][0]:
509 #self._selected_units[self._selected_category] = [selected_unit, self._selected_units[self._selected_category][0]]
511 units = unit_data.UNIT_DESCRIPTIONS[self._selected_category].keys()
513 del units[0] # do not display .base_unit description key
515 #Restore oldest selection first.
516 if self._selected_units[self._selected_category][1]:
519 if unit == self._selected_units[self._selected_category][1]:
520 self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
523 #Restore newest selection second.
526 if unit == self._selected_units[self._selected_category][0]:
527 self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
530 # select the text so user can start typing right away
531 self._unitValue.grab_focus()
532 self._unitValue.select_region(0, -1)
534 def _on_button_released(self, row, a):
535 self._on_click_unit(row)
537 def _on_click_unit(self, row):
538 self._calcsuppress = True #suppress calculations
540 #Determine the contents of the selected row.
541 selected, iter = self._unitsView.get_selection().get_selected()
543 selected_unit = selected.get_value(iter, 0)
545 unit_spec = self._unitDataInCategory[selected_unit]
547 #Clear out the description
548 text_model = gtk.TextBuffer(None)
549 self._unitDescription.set_buffer(text_model)
551 enditer = text_model.get_end_iter()
552 text_model.insert(enditer, unit_spec[2])
554 if self._unitName.get_text() != selected_unit:
555 self._previousUnitName.set_text(self._unitName.get_text())
556 self._previousUnitValue.set_text(self._unitValue.get_text())
557 if self._unitSymbol.get() == None:
558 self._previousUnitSymbol.set_text('')
560 self._previousUnitSymbol.set_text(self._unitSymbol.get())
561 self._unitName.set_text(selected_unit)
563 self._unitValue.set_text(selected.get_value(iter, 1))
565 self._unitSymbol.set_text(unit_spec[1]) # put units into label text
566 if self._unitValue.get_text() == '':
567 if self._selected_category == "Computer Numbers":
568 self._unitValue.set_text("0")
570 self._unitValue.set_text("0.0")
572 #For historical purposes, record this unit as the most recent one in this category.
573 # Also, if a previous unit exists, then shift that previous unit to oldest unit.
574 if self._selected_category in self._selected_units:
575 if self._selected_units[self._selected_category][0]:
576 self._selected_units[self._selected_category] = [selected_unit, self._selected_units[self._selected_category][0]]
578 self._selected_units[self._selected_category] = [selected_unit, '']
580 # select the text so user can start typing right away
581 self._unitValue.grab_focus()
582 self._unitValue.select_region(0, -1)
584 self._calcsuppress = False #enable calculations
586 def _on_user_write_units(self, a):
587 ''"Write the list of categories and units to stdout for documentation purposes.''"
588 messagebox_model = gtk.TextBuffer(None)
589 messageboxtext.set_buffer(messagebox_model)
590 messagebox_model.insert_at_cursor(_(u'The units are being written to stdout. You can capture this printout by starting gonvert from the command line as follows: \n$ gonvert > file.txt'), -1)
592 while gtk.events_pending():
593 gtk.mainiteration(False)
597 print 'gonvert-%s%s' % (
598 constants.__version__,
599 _(u' - Unit Conversion Utility - Convertible units listing: ')
601 for category_key in unit_data.UNIT_CATEGORIES:
602 total_categories = total_categories + 1
603 print category_key, ": "
604 self._unitDataInCategory = unit_data.UNIT_DESCRIPTIONS[category_key]
605 unit_keys = self._unitDataInCategory.keys()
607 del unit_keys[0] # do not display .base_unit description key
608 for unit_key in unit_keys:
609 total_units = total_units + 1
611 print total_categories, ' categories'
612 print total_units, ' units'
614 def _on_unit_value_changed(self, a):
615 if self._calcsuppress:
616 #self._calcsuppress = False
618 # determine if value to be calculated is empty
619 if self._selected_category == "Computer Numbers":
620 if self._unitValue.get_text() == '':
623 value = self._unitValue.get_text()
625 if self._unitValue.get_text() == '':
628 value = float(self._unitValue.get_text())
630 if self._unitName.get_text() != '':
631 func, arg = self._unitDataInCategory[self._unitName.get_text()][0] #retrieve the conversion function and value from the selected unit
632 base = apply(func.to_base, (value, arg, )) #determine the base unit value
634 keys = self._unitDataInCategory.keys()
639 #point to the first row
640 iter = self._unitModel.get_iter_first()
643 #get the formula from the name at the row
644 func, arg = self._unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
646 #set the result in the value column
647 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
649 #point to the next row in the self._unitModel
650 iter = self._unitModel.iter_next(iter)
652 # if the second row has a unit then update its value
653 if self._previousUnitName.get_text() != '':
654 self._calcsuppress = True
655 func, arg = self._unitDataInCategory[self._previousUnitName.get_text()][0]
656 self._previousUnitValue.set_text(str(apply(func.from_base, (base, arg, ))))
657 self._calcsuppress = False
659 def _on_previous_unit_value_changed(self, a):
660 if self._calcsuppress == True:
661 #self._calcsuppress = False
663 # determine if value to be calculated is empty
664 if self._selected_category == "Computer Numbers":
665 if self._previousUnitValue.get_text() == '':
668 value = self._previousUnitValue.get_text()
670 if self._previousUnitValue.get_text() == '':
673 value = float(self._previousUnitValue.get_text())
675 if self._previousUnitName.get_text() != '':
676 func, arg = self._unitDataInCategory[self._previousUnitName.get_text()][0] #retrieve the conversion function and value from the selected unit
677 base = apply(func.to_base, (value, arg, )) #determine the base unit value
679 keys = self._unitDataInCategory.keys()
684 #point to the first row
685 iter = self._unitModel.get_iter_first()
688 #get the formula from the name at the row
689 func, arg = self._unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
691 #set the result in the value column
692 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
694 #point to the next row in the self._unitModel
695 iter = self._unitModel.iter_next(iter)
697 # if the second row has a unit then update its value
698 if self._unitName.get_text() != '':
699 self._calcsuppress = True
700 func, arg = self._unitDataInCategory[self._unitName.get_text()][0]
701 self._unitValue.set_text(str(apply(func.from_base, (base, arg, ))))
702 self._calcsuppress = False
706 logging.basicConfig(level = logging.DEBUG)
708 os.makedirs(constants._data_path_)
717 if __name__ == "__main__":