git.maemo.org Git - gonvert/blob - src/gonvert_glade.py

   1 #!/usr/bin/env python
   2 # -*- coding: UTF8 -*-
   3
   4 import os
   5 import pickle
   6 import string
   7 import gettext
   8 import logging
   9
  10 import gobject
  11 import gtk
  12 import gtk.glade
  13 import gtk.gdk
  14
  15 import constants
  16 import unit_data
  17
  18
  19 _moduleLogger = logging.getLogger("gonvert_glade")
  20
  21 gettext.bindtextdomain('gonvert', '/usr/share/locale')
  22 gettext.textdomain('gonvert')
  23 _ = gettext.gettext
  24
  25
  26 def change_menu_label(widgets, labelname, newtext):
  27         item_label = widgets.get_widget(labelname).get_children()[0]
  28         item_label.set_text(newtext)
  29
  30
  31 class Gonvert(object):
  32
  33         _glade_files = [
  34                 os.path.join(os.path.dirname(__file__), "gonvert.glade"),
  35                 os.path.join(os.path.dirname(__file__), "../data/gonvert.glade"),
  36                 os.path.join(os.path.dirname(__file__), "../lib/gonvert.glade"),
  37                 '/usr/lib/gonvert/gonvert.glade',
  38         ]
  39
  40         def __init__(self):
  41                 self._unitDataInCategory = None
  42                 self._calcsuppress = False
  43                 self._unit_sort_direction = False
  44                 self._value_sort_direction = False
  45                 self._units_sort_direction = False
  46
  47                 self._find_result = [] # empty find result list
  48                 self._find_count = 0 # default to find result number zero
  49
  50                 self._selected_category = '' # preset to no selected category
  51                 self._selected_units = {} # empty dictionary for later use
  52
  53                 #check to see if glade file is in current directory (user must be
  54                 # running from download untar directory)
  55                 for gladePath in self._glade_files:
  56                         if os.path.isfile(gladePath):
  57                                 homepath = os.path.dirname(gladePath)
  58                                 pixmapspath = "/".join((homepath, "pixmaps"))
  59                                 widgets = gtk.glade.XML(gladePath)
  60                                 break
  61                 else:
  62                         return
  63
  64                 self._mainWindow = widgets.get_widget('mainWindow')
  65
  66                 change_menu_label(widgets, 'fileMenuItem', _('File'))
  67                 change_menu_label(widgets, 'exitMenuItem', _('Exit'))
  68                 change_menu_label(widgets, 'toolsMenuItem', _('Tools'))
  69                 change_menu_label(widgets, 'clearSelectionMenuItem', _('Clear selections'))
  70                 change_menu_label(widgets, 'writeUnitsMenuItem', _('Write Units'))
  71                 change_menu_label(widgets, 'helpMenuItem', _('Help'))
  72                 change_menu_label(widgets, 'aboutMenuItem', _('About'))
  73                 change_menu_label(widgets, 'findButton', _('Find'))
  74
  75                 self._shortlistcheck = widgets.get_widget('shortlistcheck')
  76                 self._toggleShortList = widgets.get_widget('toggleShortList')
  77
  78                 self._categoryView = widgets.get_widget('categoryView')
  79
  80                 self._unitsView = widgets.get_widget('unitsView')
  81                 self._unitsView_selection = self._unitsView.get_selection()
  82
  83                 self._unitName = widgets.get_widget('unitName')
  84                 self._unitValue = widgets.get_widget('unitValue')
  85                 self._previousUnitName = widgets.get_widget('previousUnitName')
  86                 self._previousUnitValue = widgets.get_widget('previousUnitValue')
  87                 messagebox = widgets.get_widget('msgbox')
  88                 messageboxtext = widgets.get_widget('msgboxtext')
  89
  90                 self._unitSymbol = widgets.get_widget('unitSymbol')
  91                 self._previousUnitSymbol = widgets.get_widget('previousUnitSymbol')
  92
  93                 self._unitDescription = widgets.get_widget('unitDescription')
  94
  95                 self._findEntry = widgets.get_widget('findEntry')
  96                 self._findLabel = widgets.get_widget('findLabel')
  97                 findButton = widgets.get_widget('findButton')
  98                 ToolTips = gtk.Tooltips()
  99                 ToolTips.set_tip(findButton, _(u'Find unit (F6)'))
 100
 101                 #insert a self._categoryColumnumn into the units list even though the heading will not be seen
 102                 renderer = gtk.CellRendererText()
 103                 self._unitNameColumn = gtk.TreeViewColumn(_('Unit Name'), renderer)
 104                 self._unitNameColumn.set_property('resizable', 1)
 105                 self._unitNameColumn.add_attribute(renderer, 'text', 0)
 106                 self._unitNameColumn.set_clickable(True)
 107                 self._unitNameColumn.connect("clicked", self._on_click_unit_column)
 108                 self._unitsView.append_column(self._unitNameColumn)
 109
 110                 self._unitValueColumn = gtk.TreeViewColumn(_('Value'), renderer)
 111                 self._unitValueColumn.set_property('resizable', 1)
 112                 self._unitValueColumn.add_attribute(renderer, 'text', 1)
 113                 self._unitValueColumn.set_clickable(True)
 114                 self._unitValueColumn.connect("clicked", self._on_click_unit_column)
 115                 self._unitsView.append_column(self._unitValueColumn)
 116
 117                 self._unitSymbolColumn = gtk.TreeViewColumn(_('Units'), renderer)
 118                 self._unitSymbolColumn.set_property('resizable', 1)
 119                 self._unitSymbolColumn.add_attribute(renderer, 'text', 2)
 120                 self._unitSymbolColumn.set_clickable(True)
 121                 self._unitSymbolColumn.connect("clicked", self._on_click_unit_column)
 122                 self._unitsView.append_column(self._unitSymbolColumn)
 123
 124                 self._unitModel = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING, gobject.TYPE_STRING)
 125                 self._sortedUnitModel = gtk.TreeModelSort(self._unitModel)
 126                 columns = self._get_column_sort_stuff()
 127                 for columnIndex, (column, sortDirection, col_cmp) in enumerate(columns):
 128                         self._sortedUnitModel.set_sort_func(columnIndex, col_cmp)
 129                 self._unitsView.set_model(self._sortedUnitModel)
 130
 131                 #Insert a column into the category list even though the heading will not be seen
 132                 renderer = gtk.CellRendererText()
 133                 self._categoryColumn = gtk.TreeViewColumn('Title', renderer)
 134                 self._categoryColumn.set_property('resizable', 1)
 135                 self._categoryColumn.add_attribute(renderer, 'text', 0)
 136                 self._categoryView.append_column(self._categoryColumn)
 137
 138                 self._categoryModel = gtk.ListStore(gobject.TYPE_STRING)
 139                 self._categoryView.set_model(self._categoryModel)
 140                 #colourize each row differently for easier reading
 141                 self._categoryView.set_property('rules_hint', 1)
 142
 143                 #Populate the catagories list
 144                 for key in unit_data.UNIT_CATEGORIES:
 145                         iter = self._categoryModel.append()
 146                         self._categoryModel.set(iter, 0, key)
 147
 148                 #--------- connections to GUI ----------------
 149                 dic = {
 150                         "on_exit_menu_activate": self._on_user_exit,
 151                         "on_main_window_destroy": self._on_user_exit,
 152                         "on_categoryView_select_row": self._on_click_category,
 153                         "on_unitValue_changed": self._on_unit_value_changed,
 154                         "on_previousUnitValue_changed": self._on_previous_unit_value_changed,
 155                         "on_writeUnitsMenuItem_activate": self._on_user_write_units,
 156                         "on_findButton_clicked": self._on_find_activate,
 157                         "on_findEntry_activated": self._on_find_activate,
 158                         "on_findEntry_changed": self._on_findEntry_changed,
 159                         "on_aboutMenuItem_activate": self._on_about_clicked,
 160                         "on_messagebox_ok_clicked": self.messagebox_ok_clicked,
 161                         "on_clearSelectionMenuItem_activate": self._on_user_clear_selections,
 162                         "on_unitsView_cursor_changed": self._on_click_unit,
 163                         "on_shortlistcheck_toggled": self._on_shortlist_changed,
 164                         "on_toggleShortList_activate": self._on_edit_shortlist,
 165                 }
 166                 widgets.signal_autoconnect(dic)
 167
 168                 self._mainWindow.set_title('gonvert- %s - Unit Conversion Utility' % constants.__version__)
 169                 iconPath = pixmapspath + '/gonvert.png'
 170                 if os.path.exists(iconPath):
 171                         self._mainWindow.set_icon(gtk.gdk.pixbuf_new_from_file(iconPath))
 172                 else:
 173                         _moduleLogger.warn("Error: Could not find gonvert icon: %s" % iconPath)
 174
 175                 self._load_settings()
 176
 177         def _load_settings(self):
 178                 #Restore window size from previously saved settings if it exists and is valid.
 179                 windowDatPath = "/".join((constants._data_path_, "window.dat"))
 180                 if os.path.exists(windowDatPath):
 181                         #Retrieving previous window settings from ~/.gonvert/window.dat
 182                         saved_window = pickle.load(open(windowDatPath, "r"))
 183                         #If the 'size' has been stored, then extract size from saved_window.
 184                         if 'size' in saved_window:
 185                                 a, b = saved_window['size']
 186                                 self._mainWindow.resize(a, b)
 187                         else:
 188                                 #Maximize if no previous size was found
 189                                 #self._mainWindow.maximize()
 190                                 pass
 191                 else:
 192                         #Maximize if no previous window.dat file was found
 193                         #self._mainWindow.maximize()
 194                         pass
 195
 196                 #Restore selections from previously saved settings if it exists and is valid.
 197                 historical_catergory_found = False
 198                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 199                 if os.path.exists(selectionsDatPath):
 200                         #Retrieving previous selections from ~/.gonvert/selections.dat
 201                         selections = pickle.load(open(selectionsDatPath, 'r'))
 202                         #Restoring previous selections.
 203                         #If the 'selected_unts' has been stored, then extract self._selected_units from selections.
 204                         if 'selected_units' in selections:
 205                                 self._selected_units = selections['selected_units']
 206                         #Make sure that the 'self._selected_category' has been stored.
 207                         if 'selected_category' in selections:
 208                                 #Match an available category to the previously selected category.
 209                                 for counter in range(len(unit_data.UNIT_CATEGORIES)):
 210                                         if selections['selected_category'] == unit_data.UNIT_CATEGORIES[counter]:
 211                                                 # Restore the previously selected category.
 212                                                 self._categoryView.set_cursor(counter, self._categoryColumn, False)
 213                                                 self._categoryView.grab_focus()
 214                                 historical_catergory_found = True
 215
 216                 if not historical_catergory_found:
 217                         print "Couldn't find saved category, using default."
 218                         #If historical records were not kept then default to
 219                         # put the focus on the first category
 220                         self._categoryView.set_cursor(0, self._categoryColumn, False)
 221                         self._categoryView.grab_focus()
 222
 223                 self.restore_units()
 224
 225         def _save_settings(self):
 226                 """
 227                 This routine saves the selections to a file, and
 228                 should therefore only be called when exiting the program.
 229
 230                 Update selections dictionary which consists of the following keys:
 231                 'self._selected_category': full name of selected category
 232                 'self._selected_units': self._selected_units dictionary which contains:
 233                 [categoryname: #1 displayed unit, #2 displayed unit]
 234                 """
 235                 #Determine the contents of the selected category row
 236                 selected, iter = self._categoryView.get_selection().get_selected()
 237                 self._selected_category = self._categoryModel.get_value(iter, 0)
 238
 239                 selections = {
 240                         'selected_category': self._selected_category,
 241                         'selected_units': self._selected_units
 242                 }
 243                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 244                 pickle.dump(selections, open(selectionsDatPath, 'w'))
 245
 246                 #Get last size of app and save it
 247                 window_settings = {
 248                         'size': self._mainWindow.get_size()
 249                 }
 250                 windowDatPath = "/".join((constants._data_path_, "window.dat"))
 251                 pickle.dump(window_settings, open(windowDatPath, 'w'))
 252
 253         def _clear_find(self):
 254                 # switch to "new find" state
 255                 self._find_result = []
 256                 self._find_count = 0
 257
 258                 # Clear our user message
 259                 self._findLabel.set_text('')
 260
 261         def _find_first(self):
 262                 assert len(self._find_result) == 0
 263                 assert self._find_count == 0
 264                 findString = string.lower(string.strip(self._findEntry.get_text()))
 265                 if not findString:
 266                         return
 267
 268                 # Gather info on all the matching units from all categories
 269                 for catIndex, category in enumerate(unit_data.UNIT_CATEGORIES):
 270                         units = unit_data.get_units(category)
 271                         for unitIndex, unit in enumerate(units):
 272                                 loweredUnit = unit.lower()
 273                                 if loweredUnit in findString or findString in loweredUnit:
 274                                         self._find_result.append((category, unit, catIndex, unitIndex))
 275
 276                 if not self._find_result:
 277                         return
 278
 279                 self._select_found_unit()
 280
 281         def _find_wrap_around(self):
 282                 assert 0 < len(self._find_result)
 283                 assert self._find_count + 1 == len(self._find_result)
 284                 #select first result
 285                 self._find_count = 0
 286                 self._select_found_unit()
 287
 288         def _find_next(self):
 289                 assert 0 < len(self._find_result)
 290                 assert self._find_count + 1 < len(self._find_result)
 291                 self._find_count += 1
 292                 self._select_found_unit()
 293
 294         def _select_found_unit(self):
 295                 assert 0 < len(self._find_result)
 296
 297                 #check if next find is in a new category (prevent category changes when unnecessary
 298                 if self._selected_category != self._find_result[self._find_count][0]:
 299                         self._categoryView.set_cursor(
 300                                 self._find_result[self._find_count][2], self._categoryColumn, False
 301                         )
 302
 303                 self._unitsView.set_cursor(
 304                         self._find_result[self._find_count][3], self._unitNameColumn, True
 305                 )
 306
 307         def _on_shortlist_changed(self, *args):
 308                 try:
 309                         raise NotImplementedError("%s" % self._shortlistcheck.get_active())
 310                 except Exception:
 311                         _moduleLogger.exception()
 312
 313         def _on_edit_shortlist(self, *args):
 314                 try:
 315                         raise NotImplementedError("%s" % self._toggleShortList.get_active())
 316                 except Exception:
 317                         _moduleLogger.exception()
 318
 319         def _on_user_clear_selections(self, *args):
 320                 try:
 321                         selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 322                         os.remove(selectionsDatPath)
 323                         self._selected_units = {}
 324                 except Exception:
 325                         _moduleLogger.exception()
 326
 327         def _on_findEntry_changed(self, *args):
 328                 """
 329                 Clear out find results since the user wants to look for something new
 330                 """
 331                 try:
 332                         self._clear_find()
 333                 except Exception:
 334                         _moduleLogger.exception()
 335
 336         def _on_find_activate(self, a):
 337                 """
 338                 check if 'new find' or 'last find' or 'next-find'
 339
 340                 new-find = run the find algorithm which also selects the first found unit
 341                          = self._find_count = 0 and self._find_result = []
 342
 343                 last-find = restart from top again
 344                           = self._find_count = len(self._find_result)
 345
 346                 next-find = continue to next found location
 347                            = self._find_count = 0 and len(self._find_result)>0
 348                 """
 349                 try:
 350                         if len(self._find_result) == 0:
 351                                 self._find_first()
 352                         else:
 353                                 if self._find_count == len(self._find_result)-1:
 354                                         self._find_wrap_around()
 355                                 else:
 356                                         self._find_next()
 357
 358                         if not self._find_result:
 359                                 self._findLabel.set_text('Text not found')
 360                         else:
 361                                 resultsLeft = len(self._find_result) - self._find_count - 1
 362                                 self._findLabel.set_text(
 363                                         '%s result(s) left' % (resultsLeft, )
 364                                 )
 365                 except Exception:
 366                         _moduleLogger.exception()
 367
 368         def _unit_model_cmp(self, sortedModel, leftItr, rightItr):
 369                 leftUnitText = self._unitModel.get_value(leftItr, 0)
 370                 rightUnitText = self._unitModel.get_value(rightItr, 0)
 371                 return cmp(leftUnitText, rightUnitText)
 372
 373         def _symbol_model_cmp(self, sortedModel, leftItr, rightItr):
 374                 leftSymbolText = self._unitModel.get_value(leftItr, 2)
 375                 rightSymbolText = self._unitModel.get_value(rightItr, 2)
 376                 return cmp(leftSymbolText, rightSymbolText)
 377
 378         def _value_model_cmp(self, sortedModel, leftItr, rightItr):
 379                 #special sorting exceptions for ascii values (instead of float values)
 380                 if self._selected_category == "Computer Numbers":
 381                         leftValue = self._unitModel.get_value(leftItr, 1)
 382                         rightValue = self._unitModel.get_value(rightItr, 1)
 383                 else:
 384                         leftValueText = self._unitModel.get_value(leftItr, 1)
 385                         leftValue = float(leftValueText) if leftValueText else 0.0
 386
 387                         rightValueText = self._unitModel.get_value(rightItr, 1)
 388                         rightValue = float(rightValueText) if rightValueText else 0.0
 389                 return cmp(leftValue, rightValue)
 390
 391         def _get_column_sort_stuff(self):
 392                 columns = (
 393                         (self._unitNameColumn, "_unit_sort_direction", self._unit_model_cmp),
 394                         (self._unitValueColumn, "_value_sort_direction", self._value_model_cmp),
 395                         (self._unitSymbolColumn, "_units_sort_direction", self._symbol_model_cmp),
 396                 )
 397                 return columns
 398
 399         def _on_click_unit_column(self, col):
 400                 """
 401                 Sort the contents of the col when the user clicks on the title.
 402                 """
 403                 try:
 404                         #Determine which column requires sorting
 405                         columns = self._get_column_sort_stuff()
 406                         for column, directionName, col_cmp in columns:
 407                                 column.set_sort_indicator(False)
 408                         for columnIndex, (maybeCol, directionName, col_cmp) in enumerate(columns):
 409                                 if col is maybeCol:
 410                                         direction = getattr(self, directionName)
 411                                         gtkDirection = gtk.SORT_ASCENDING if direction else gtk.SORT_DESCENDING
 412
 413                                         # cause a sort
 414                                         self._sortedUnitModel.set_sort_column_id(columnIndex, gtkDirection)
 415
 416                                         # set the visual for sorting
 417                                         col.set_sort_indicator(True)
 418                                         col.set_sort_order(not direction)
 419
 420                                         setattr(self, directionName, not direction)
 421                                         break
 422                         else:
 423                                 assert False, "Unknown column: %s" % (col.get_title(), )
 424                 except Exception:
 425                         _moduleLogger.exception()
 426
 427         def _on_click_category(self, row):
 428                 #Colourize each row alternately for easier reading
 429                 self._unitsView.set_property('rules_hint', 1)
 430
 431                 #Clear out the description
 432                 text_model = gtk.TextBuffer(None)
 433                 self._unitDescription.set_buffer(text_model)
 434
 435                 #Determine the contents of the selected category row
 436                 selected, iter = row.get_selection().get_selected()
 437
 438                 self._selected_category = self._categoryModel.get_value(iter, 0)
 439
 440                 self._unit_sort_direction = False
 441                 self._value_sort_direction = False
 442                 self._units_sort_direction = False
 443                 self._unitNameColumn.set_sort_indicator(False)
 444                 self._unitValueColumn.set_sort_indicator(False)
 445                 self._unitSymbolColumn.set_sort_indicator(False)
 446
 447                 self._unitDataInCategory = unit_data.UNIT_DESCRIPTIONS[selected.get_value(iter, 0)]
 448                 keys = self._unitDataInCategory.keys()
 449                 keys.sort()
 450                 del keys[0] # do not display .base_unit description key
 451
 452                 #Fill up the units descriptions and clear the value cells
 453                 self._unitModel.clear()
 454                 for key in keys:
 455                         iter = self._unitModel.append()
 456                         self._unitModel.set(iter, 0, key, 1, '', 2, self._unitDataInCategory[key][1])
 457                 self._sortedUnitModel.sort_column_changed()
 458
 459                 self._unitName.set_text('')
 460                 self._unitValue.set_text('')
 461                 self._previousUnitName.set_text('')
 462                 self._previousUnitValue.set_text('')
 463                 self._unitSymbol.set_text('')
 464                 self._previousUnitSymbol.set_text('')
 465
 466                 self.restore_units()
 467
 468         def restore_units(self):
 469                 # Restore the previous historical settings of previously selected units in this newly selected category
 470                 #Since category has just been clicked, the list will be sorted already.
 471                 if self._selected_category in self._selected_units:
 472                         if self._selected_units[self._selected_category][0]:
 473                                 #self._selected_units[self._selected_category] = [selected_unit, self._selected_units[self._selected_category][0]]
 474
 475                                 units = unit_data.UNIT_DESCRIPTIONS[self._selected_category].keys()
 476                                 units.sort()
 477                                 del units[0] # do not display .base_unit description key
 478
 479                                 #Restore oldest selection first.
 480                                 if self._selected_units[self._selected_category][1]:
 481                                         unit_no = 0
 482                                         for unit in units:
 483                                                 if unit == self._selected_units[self._selected_category][1]:
 484                                                         self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
 485                                                 unit_no = unit_no+1
 486
 487                                 #Restore newest selection second.
 488                                 unit_no = 0
 489                                 for unit in units:
 490                                         if unit == self._selected_units[self._selected_category][0]:
 491                                                 self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
 492                                         unit_no = unit_no+1
 493
 494                 # select the text so user can start typing right away
 495                 self._unitValue.grab_focus()
 496                 self._unitValue.select_region(0, -1)
 497
 498         def _on_click_unit(self, row):
 499                 self._calcsuppress = True #suppress calculations
 500
 501                 #Determine the contents of the selected row.
 502                 selected, iter = self._unitsView.get_selection().get_selected()
 503
 504                 selected_unit = selected.get_value(iter, 0)
 505
 506                 unit_spec = self._unitDataInCategory[selected_unit]
 507
 508                 #Clear out the description
 509                 text_model = gtk.TextBuffer(None)
 510                 self._unitDescription.set_buffer(text_model)
 511
 512                 enditer = text_model.get_end_iter()
 513                 text_model.insert(enditer, unit_spec[2])
 514
 515                 if self._unitName.get_text() != selected_unit:
 516                         self._previousUnitName.set_text(self._unitName.get_text())
 517                         self._previousUnitValue.set_text(self._unitValue.get_text())
 518                         if self._unitSymbol.get() == None:
 519                                 self._previousUnitSymbol.set_text('')
 520                         else:
 521                                 self._previousUnitSymbol.set_text(self._unitSymbol.get())
 522                 self._unitName.set_text(selected_unit)
 523
 524                 self._unitValue.set_text(selected.get_value(iter, 1))
 525
 526                 self._unitSymbol.set_text(unit_spec[1]) # put units into label text
 527                 if self._unitValue.get_text() == '':
 528                         if self._selected_category == "Computer Numbers":
 529                                 self._unitValue.set_text("0")
 530                         else:
 531                                 self._unitValue.set_text("0.0")
 532
 533                 #For historical purposes, record this unit as the most recent one in this category.
 534                 # Also, if a previous unit exists, then shift that previous unit to oldest unit.
 535                 if self._selected_category in self._selected_units:
 536                         if self._selected_units[self._selected_category][0]:
 537                                 self._selected_units[self._selected_category] = [selected_unit, self._selected_units[self._selected_category][0]]
 538                 else:
 539                         self._selected_units[self._selected_category] = [selected_unit, '']
 540
 541                 # select the text so user can start typing right away
 542                 self._unitValue.grab_focus()
 543                 self._unitValue.select_region(0, -1)
 544
 545                 self._calcsuppress = False #enable calculations
 546
 547         def messagebox_ok_clicked(self, a):
 548                 messagebox.hide()
 549
 550         def _on_user_write_units(self, a):
 551                 ''"Write the list of categories and units to stdout for documentation purposes.''"
 552                 messagebox_model = gtk.TextBuffer(None)
 553                 messageboxtext.set_buffer(messagebox_model)
 554                 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)
 555                 messagebox.show()
 556                 while gtk.events_pending():
 557                         gtk.mainiteration(False)
 558
 559                 total_categories = 0
 560                 total_units = 0
 561                 print 'gonvert-%s%s' % (
 562                         constants.__version__,
 563                         _(u' - Unit Conversion Utility  - Convertible units listing: ')
 564                 )
 565                 for category_key in unit_data.UNIT_CATEGORIES:
 566                         total_categories = total_categories + 1
 567                         print category_key, ": "
 568                         self._unitDataInCategory = unit_data.UNIT_DESCRIPTIONS[category_key]
 569                         unit_keys = self._unitDataInCategory.keys()
 570                         unit_keys.sort()
 571                         del unit_keys[0] # do not display .base_unit description key
 572                         for unit_key in unit_keys:
 573                                 total_units = total_units + 1
 574                                 print "\t", unit_key
 575                 print total_categories, ' categories'
 576                 print total_units, ' units'
 577
 578         def _on_unit_value_changed(self, a):
 579                 if self._calcsuppress:
 580                         #self._calcsuppress = False
 581                         return
 582                 # determine if value to be calculated is empty
 583                 if self._selected_category == "Computer Numbers":
 584                         if self._unitValue.get_text() == '':
 585                                 value = '0'
 586                         else:
 587                                 value = self._unitValue.get_text()
 588                 else:
 589                         if self._unitValue.get_text() == '':
 590                                 value = 0.0
 591                         else:
 592                                 value = float(self._unitValue.get_text())
 593
 594                 if self._unitName.get_text() != '':
 595                         func, arg = self._unitDataInCategory[self._unitName.get_text()][0] #retrieve the conversion function and value from the selected unit
 596                         base = apply(func.to_base, (value, arg, )) #determine the base unit value
 597
 598                         keys = self._unitDataInCategory.keys()
 599                         keys.sort()
 600                         del keys[0]
 601                         row = 0
 602
 603                         #point to the first row
 604                         iter = self._unitModel.get_iter_first()
 605
 606                         while iter:
 607                                 #get the formula from the name at the row
 608                                 func, arg = self._unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
 609
 610                                 #set the result in the value column
 611                                 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
 612
 613                                 #point to the next row in the self._unitModel
 614                                 iter = self._unitModel.iter_next(iter)
 615
 616                         # if the second row has a unit then update its value
 617                         if self._previousUnitName.get_text() != '':
 618                                 self._calcsuppress = True
 619                                 func, arg = self._unitDataInCategory[self._previousUnitName.get_text()][0]
 620                                 self._previousUnitValue.set_text(str(apply(func.from_base, (base, arg, ))))
 621                                 self._calcsuppress = False
 622
 623         def _on_previous_unit_value_changed(self, a):
 624                 if self._calcsuppress == True:
 625                         #self._calcsuppress = False
 626                         return
 627                 # determine if value to be calculated is empty
 628                 if self._selected_category == "Computer Numbers":
 629                         if self._previousUnitValue.get_text() == '':
 630                                 value = '0'
 631                         else:
 632                                 value = self._previousUnitValue.get_text()
 633                 else:
 634                         if self._previousUnitValue.get_text() == '':
 635                                 value = 0.0
 636                         else:
 637                                 value = float(self._previousUnitValue.get_text())
 638
 639                 if self._previousUnitName.get_text() != '':
 640                         func, arg = self._unitDataInCategory[self._previousUnitName.get_text()][0] #retrieve the conversion function and value from the selected unit
 641                         base = apply(func.to_base, (value, arg, )) #determine the base unit value
 642
 643                         keys = self._unitDataInCategory.keys()
 644                         keys.sort()
 645                         del keys[0]
 646                         row = 0
 647
 648                         #point to the first row
 649                         iter = self._unitModel.get_iter_first()
 650
 651                         while iter:
 652                                 #get the formula from the name at the row
 653                                 func, arg = self._unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
 654
 655                                 #set the result in the value column
 656                                 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
 657
 658                                 #point to the next row in the self._unitModel
 659                                 iter = self._unitModel.iter_next(iter)
 660
 661                         # if the second row has a unit then update its value
 662                         if self._unitName.get_text() != '':
 663                                 self._calcsuppress = True
 664                                 func, arg = self._unitDataInCategory[self._unitName.get_text()][0]
 665                                 self._unitValue.set_text(str(apply(func.from_base, (base, arg, ))))
 666                                 self._calcsuppress = False
 667
 668         def _on_about_clicked(self, a):
 669                 dlg = gtk.AboutDialog()
 670                 dlg.set_name(constants.__pretty_app_name__)
 671                 dlg.set_version("%s-%d" % (constants.__version__, constants.__build__))
 672                 dlg.set_copyright("Copyright 2009 - GPL")
 673                 dlg.set_comments("")
 674                 dlg.set_website("http://unihedron.com/projects/gonvert/gonvert.php")
 675                 dlg.set_authors(["Anthony Tekatch <anthony@unihedron.com>", "Ed Page <edpage@byu.net>"])
 676                 dlg.run()
 677                 dlg.destroy()
 678
 679         def _on_user_exit(self, *args):
 680                 try:
 681                         self._save_settings()
 682                 except Exception:
 683                         _moduleLogger.exception()
 684                 finally:
 685                         gtk.main_quit()
 686
 687
 688 def main():
 689         logging.basicConfig(level = logging.DEBUG)
 690         try:
 691                 os.makedirs(constants._data_path_)
 692         except OSError, e:
 693                 if e.errno != 17:
 694                         raise
 695
 696         gonvert = Gonvert()
 697         gtk.main()
 698
 699
 700 if __name__ == "__main__":
 701         main()