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