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