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 sys
   8 import gettext
   9 import logging
  10
  11 import gobject
  12 import gtk
  13 import gtk.glade
  14 import gtk.gdk
  15
  16 import constants
  17 import evil_globals
  18 import unit_data
  19
  20
  21 _moduleLogger = logging.getLogger("gonvert_glade")
  22
  23 gettext.bindtextdomain('gonvert', '/usr/share/locale')
  24 gettext.textdomain('gonvert')
  25 _ = gettext.gettext
  26
  27
  28 def change_menu_label(widgets, labelname, newtext):
  29         item_label = widgets.get_widget(labelname).get_children()[0]
  30         item_label.set_text(newtext)
  31
  32
  33 class Gonvert(object):
  34
  35         _glade_files = [
  36                 os.path.join(os.path.dirname(__file__), "gonvert.glade"),
  37                 os.path.join(os.path.dirname(__file__), "../data/gonvert.glade"),
  38                 os.path.join(os.path.dirname(__file__), "../lib/gonvert.glade"),
  39                 '/usr/lib/gonvert/gonvert.glade',
  40         ]
  41
  42         def __init__(self):
  43                 #check to see if glade file is in current directory (user must be
  44                 # running from download untar directory)
  45                 for gladePath in self._glade_files:
  46                         if os.path.isfile(gladePath):
  47                                 homepath = os.path.dirname(gladePath)
  48                                 pixmapspath = "/".join((homepath, "pixmaps"))
  49                                 widgets = gtk.glade.XML(gladePath)
  50                                 break
  51                 else:
  52                         return
  53
  54                 self._mainWindow = widgets.get_widget('mainWindow')
  55
  56                 change_menu_label(widgets, 'fileMenuItem', _('File'))
  57                 change_menu_label(widgets, 'exitMenuItem', _('Exit'))
  58                 change_menu_label(widgets, 'toolsMenuItem', _('Tools'))
  59                 change_menu_label(widgets, 'clearSelectionMenuItem', _('Clear selections'))
  60                 change_menu_label(widgets, 'writeUnitsMenuItem', _('Write Units'))
  61                 change_menu_label(widgets, 'helpMenuItem', _('Help'))
  62                 change_menu_label(widgets, 'aboutMenuItem', _('About'))
  63                 change_menu_label(widgets, 'findButton', _('Find'))
  64
  65                 self._shortlistcheck = widgets.get_widget('shortlistcheck')
  66                 self._toggleShortList = widgets.get_widget('toggleShortList')
  67
  68                 self._categoryView = widgets.get_widget('categoryView')
  69
  70                 self._unitsView = widgets.get_widget('unitsView')
  71                 self._unitsView_selection = self._unitsView.get_selection()
  72
  73                 self._unitName = widgets.get_widget('unitName')
  74                 self._unitValue = widgets.get_widget('unitValue')
  75                 self._previousUnitName = widgets.get_widget('previousUnitName')
  76                 self._previousUnitValue = widgets.get_widget('previousUnitValue')
  77                 self._about_box = widgets.get_widget('about_box')
  78                 messagebox = widgets.get_widget('msgbox')
  79                 messageboxtext = widgets.get_widget('msgboxtext')
  80
  81                 about_image = widgets.get_widget('about_image')
  82                 about_image.set_from_file(pixmapspath +'gonvert.png')
  83                 versionlabel = widgets.get_widget('versionlabel')
  84                 versionlabel.set_text(constants.__version__)
  85
  86                 self._unitSymbol = widgets.get_widget('unitSymbol')
  87                 self._previousUnitSymbol = widgets.get_widget('previousUnitSymbol')
  88
  89                 self._unitDescription = widgets.get_widget('unitDescription')
  90
  91                 self._findEntry = widgets.get_widget('findEntry')
  92                 self._findLabel = widgets.get_widget('findLabel')
  93                 findButton = widgets.get_widget('findButton')
  94
  95                 #insert a self._categoryColumnumn into the units list even though the heading will not be seen
  96                 renderer = gtk.CellRendererText()
  97                 self._unitNameColumn = gtk.TreeViewColumn(_('Unit Name'), renderer)
  98                 self._unitNameColumn.set_property('resizable', 1)
  99                 self._unitNameColumn.add_attribute(renderer, 'text', 0)
 100                 self._unitNameColumn.set_clickable(True)
 101                 self._unitNameColumn.connect("clicked", self._on_click_unit_column)
 102                 self._unitsView.append_column(self._unitNameColumn)
 103
 104                 self._unitValueColumn = gtk.TreeViewColumn(_('Value'), renderer)
 105                 self._unitValueColumn.set_property('resizable', 1)
 106                 self._unitValueColumn.add_attribute(renderer, 'text', 1)
 107                 self._unitValueColumn.set_clickable(True)
 108                 self._unitValueColumn.connect("clicked", self._on_click_unit_column)
 109                 self._unitsView.append_column(self._unitValueColumn)
 110
 111                 self._unitSymbolColumn = gtk.TreeViewColumn(_('Units'), renderer)
 112                 self._unitSymbolColumn.set_property('resizable', 1)
 113                 self._unitSymbolColumn.add_attribute(renderer, 'text', 2)
 114                 self._unitSymbolColumn.set_clickable(True)
 115                 self._unitSymbolColumn.connect("clicked", self._on_click_unit_column)
 116                 self._unitsView.append_column(self._unitSymbolColumn)
 117
 118                 #Insert a column into the category list even though the heading will not be seen
 119                 renderer = gtk.CellRendererText()
 120                 self._categoryColumn = gtk.TreeViewColumn('Title', renderer)
 121                 self._categoryColumn.set_property('resizable', 1)
 122                 self._categoryColumn.add_attribute(renderer, 'text', 0)
 123                 self._categoryView.append_column(self._categoryColumn)
 124
 125                 self._categoryModel = gtk.ListStore(gobject.TYPE_STRING)
 126                 self._categoryView.set_model(self._categoryModel)
 127                 #colourize each row differently for easier reading
 128                 self._categoryView.set_property('rules_hint', 1)
 129
 130                 #Populate the catagories list
 131                 keys = unit_data.list_dic.keys()
 132                 keys.sort()
 133                 for key in keys:
 134                         iter = self._categoryModel.append()
 135                         self._categoryModel.set(iter, 0, key)
 136
 137                 ToolTips = gtk.Tooltips()
 138                 ToolTips.set_tip(findButton, _(u'Find unit (F6)'))
 139
 140                 #--------- connections to GUI ----------------
 141                 dic = {
 142                         "on_exit_menu_activate": self._on_user_exit,
 143                         "on_main_window_destroy": self._on_user_exit,
 144                         "on_categoryView_select_row": self._on_click_category,
 145                         "on_unitsView__on_click_unit_column": self._on_click_unit_column,
 146                         "on_unitValue_changed": self.top,
 147                         "on_previousUnitValue_changed": self.bottom,
 148                         "on_writeUnitsMenuItem_activate": self._on_user_write_units,
 149                         "on_findButton_clicked": self._on_user_find_units,
 150                         "on_findEntry_key_press_event": self._on_find_key_press,
 151                         "on_findEntry_changed": self._findEntry_changed,
 152                         "on_aboutMenuItem_activate": self._on_about_clicked,
 153                         "on_about_close_clicked": self._on_about_hide,
 154                         "on_messagebox_ok_clicked": self.messagebox_ok_clicked,
 155                         "on_clearSelectionMenuItem_activate": self._on_user_clear_selections,
 156                         "on_unitsView_cursor_changed": self._on_click_unit,
 157                         "on_unitsView_button_released": self._on_button_released,
 158                         "on_shortlistcheck_toggled": self._on_shortlist_changed,
 159                         "on_toggleShortList_activate": self._on_edit_shortlist,
 160                 }
 161                 widgets.signal_autoconnect(dic)
 162
 163                 self._mainWindow.set_title('gonvert- %s - Unit Conversion Utility' % constants.__version__)
 164                 iconPath = pixmapspath + '/gonvert.png'
 165                 if os.path.exists(iconPath):
 166                         self._mainWindow.set_icon(gtk.gdk.pixbuf_new_from_file(iconPath))
 167                 else:
 168                         _moduleLogger.warn("Error: Could not find gonvert icon: %s" % iconPath)
 169
 170                 #Restore window size from previously saved settings if it exists and is valid.
 171                 windowDatPath = "/".join((constants._data_path_, "window.dat"))
 172                 if os.path.exists(windowDatPath):
 173                         #Retrieving previous window settings from ~/.gonvert/window.dat
 174                         saved_window = pickle.load(open(windowDatPath, "r"))
 175                         #If the 'size' has been stored, then extract size from saved_window.
 176                         if 'size' in saved_window:
 177                                 a, b = saved_window['size']
 178                                 self._mainWindow.resize(a, b)
 179                         else:
 180                                 #Maximize if no previous size was found
 181                                 #self._mainWindow.maximize()
 182                                 pass
 183                 else:
 184                         #Maximize if no previous window.dat file was found
 185                         #self._mainWindow.maximize()
 186                         pass
 187
 188                 #Restore selections from previously saved settings if it exists and is valid.
 189                 historical_catergory_found = False
 190                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 191                 if os.path.exists(selectionsDatPath):
 192                         #Retrieving previous selections from ~/.gonvert/selections.dat
 193                         selections = pickle.load(open(selectionsDatPath, 'r'))
 194                         #Restoring previous selections.
 195                         #
 196                         #Make a list of categories to determine which one to select
 197                         categories = unit_data.list_dic.keys()
 198                         categories.sort()
 199                         #
 200                         #If the 'selected_unts' has been stored, then extract evil_globals.selected_units from selections.
 201                         if 'selected_units' in selections:
 202                                 evil_globals.selected_units = selections['selected_units']
 203                         #Make sure that the 'evil_globals.selected_category' has been stored.
 204                         if 'selected_category' in selections:
 205                                 #Match an available category to the previously selected category.
 206                                 for counter in range(len(categories)):
 207                                         if selections['selected_category'] == categories[counter]:
 208                                                 # Restore the previously selected category.
 209                                                 self._categoryView.set_cursor(counter, self._categoryColumn, False)
 210                                                 self._categoryView.grab_focus()
 211                                 historical_catergory_found = True
 212
 213                 if not historical_catergory_found:
 214                         print "Couldn't find saved category, using default."
 215                         #If historical records were not kept then default to
 216                         # put the focus on the first category
 217                         self._categoryView.set_cursor(0, self._categoryColumn, False)
 218                         self._categoryView.grab_focus()
 219
 220                 self.restore_units()
 221
 222         def _on_shortlist_changed(self, a):
 223                 print "shortlist"
 224                 if self._shortlistcheck.get_active():
 225                         print "1"
 226                 else:
 227                         print "0"
 228
 229         def _on_edit_shortlist(self, a):
 230                 print "edit shortlist"
 231                 if self._toggleShortList.get_active():
 232                         print "1"
 233                 else:
 234                         print "0"
 235
 236         def _on_user_clear_selections(self, a):
 237                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 238                 os.remove(selectionsDatPath)
 239                 evil_globals.selected_units = {}
 240
 241         def _on_user_exit(self, a):
 242                 """
 243                 This routine saves the selections to a file, and
 244                 should therefore only be called when exiting the program.
 245
 246                 Update selections dictionary which consists of the following keys:
 247                 'evil_globals.selected_category': full name of selected category
 248                 'evil_globals.selected_units': evil_globals.selected_units dictionary which contains:
 249                 [categoryname: #1 displayed unit, #2 displayed unit]
 250                 """
 251                 #Determine the contents of the selected category row
 252                 selected, iter = self._categoryView.get_selection().get_selected()
 253                 evil_globals.selected_category = self._categoryModel.get_value(iter, 0)
 254
 255                 selections = {
 256                         'selected_category': evil_globals.selected_category,
 257                         'selected_units': evil_globals.selected_units
 258                 }
 259                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 260                 pickle.dump(selections, open(selectionsDatPath, 'w'))
 261
 262                 #Get last size of app and save it
 263                 window_settings = {
 264                         'size': self._mainWindow.get_size()
 265                 }
 266                 windowDatPath = "/".join((constants._data_path_, "window.dat"))
 267                 pickle.dump(window_settings, open(windowDatPath, 'w'))
 268
 269                 gtk.mainquit
 270                 sys.exit()
 271
 272         def _findEntry_changed(self, a):
 273                 #Clear out find results since the user wants to look for something new
 274                 evil_globals.find_result = [] #empty find result list
 275                 evil_globals.find_count = 0 #default to find result number zero
 276                 self._findLabel.set_text('') #clear result
 277
 278         def _on_find_key_press(self, a, b):
 279                 #Check if the key pressed was an ASCII key
 280                 if len(b.string)>0:
 281                         #Check if the key pressed was the 'Enter' key
 282                         if ord(b.string[0]) == 13:
 283                                 #Execute the find units function
 284                                 _on_user_find_units(1)
 285
 286         def _on_about_clicked(self, a):
 287                 self._about_box.show()
 288
 289         def _on_about_hide(self, *args):
 290                 self._about_box.hide()
 291                 return gtk.TRUE
 292
 293         def messagebox_ok_clicked(self, a):
 294                 messagebox.hide()
 295
 296         def _on_user_find_units(self, a):
 297                 #check if 'new find' or 'last find' or 'next-find'
 298
 299                 #new-find = run the find algorithm which also selects the first found unit
 300                 #         = evil_globals.find_count = 0 and evil_globals.find_result = []
 301
 302                 #last-find = restart from top again
 303                 #          = evil_globals.find_count = len(evil_globals.find_result)
 304
 305                 #next-find = continue to next found location
 306                 #           = evil_globals.find_count = 0 and len(evil_globals.find_result)>0
 307
 308                 #check for new-find
 309                 if len(evil_globals.find_result) == 0:
 310                         find_string = string.lower(string.strip(self._findEntry.get_text()))
 311                         #Make sure that a valid find string has been requested
 312                         if len(find_string)>0:
 313                                 categories = unit_data.list_dic.keys()
 314                                 categories.sort()
 315                                 found_a_unit = 0 #reset the 'found-a-unit' flag
 316                                 cat_no = 0
 317                                 for category in categories:
 318                                         units = unit_data.list_dic[category].keys()
 319                                         units.sort()
 320                                         del units[0] # do not display .base_unit description key
 321                                         unit_no = 0
 322                                         for unit in units:
 323                                                 if string.find(string.lower(unit), find_string) >= 0:
 324                                                         found_a_unit = 1 #indicate that a unit was found
 325                                                         #print "'", find_string, "'", " found at category = ", category, " unit = ", unit
 326                                                         evil_globals.find_result.append((category, unit, cat_no, unit_no))
 327                                                 unit_no = unit_no+1
 328                                         cat_no = cat_no+1
 329
 330                                 if found_a_unit == 1:
 331                                         #select the first found unit
 332                                         evil_globals.find_count = 0
 333                                         #check if next find is in a new category (prevent category changes when unnecessary
 334                                         if evil_globals.selected_category != evil_globals.find_result[evil_globals.find_count][0]:
 335                                                 self._categoryView.set_cursor(evil_globals.find_result[0][2], self._categoryColumn, False)
 336                                                 self._unitsView.set_cursor(evil_globals.find_result[0][3], self._unitNameColumn, True)
 337                                                 if len(evil_globals.find_result)>1:
 338                                                         self._findLabel.set_text(('Press Find for next unit. '+ str(len(evil_globals.find_result))+' result(s).'))
 339                                                 else:
 340                                                         self._findLabel.set_text('Text not found') #Display error
 341                 else: #must be next-find or last-find
 342                         #check for last-find
 343                         if evil_globals.find_count == len(evil_globals.find_result)-1:
 344                                 #select first result
 345                                 evil_globals.find_count = 0
 346                                 self._categoryView.set_cursor(evil_globals.find_result[evil_globals.find_count][2], self._categoryColumn, False)
 347                                 self._unitsView.set_cursor(evil_globals.find_result[evil_globals.find_count][3], self._unitNameColumn, True)
 348                         else: #must be next-find
 349                                 evil_globals.find_count = evil_globals.find_count+1
 350                                 #check if next find is in a new category (prevent category changes when unnecessary
 351                                 if evil_globals.selected_category != evil_globals.find_result[evil_globals.find_count][0]:
 352                                         self._categoryView.set_cursor(evil_globals.find_result[evil_globals.find_count][2], self._categoryColumn, False)
 353                                 self._unitsView.set_cursor(evil_globals.find_result[evil_globals.find_count][3], self._unitNameColumn, True)
 354
 355         def _on_click_unit_column(self, col):
 356                 """
 357                 Sort the contents of the col when the user clicks on the title.
 358                 """
 359                 #Determine which column requires sorting
 360                 if col is self._unitNameColumn:
 361                         selectedUnitColumn = 0
 362                         self._unitNameColumn.set_sort_indicator(True)
 363                         self._unitValueColumn.set_sort_indicator(False)
 364                         self._unitSymbolColumn.set_sort_indicator(False)
 365                         self._unitNameColumn.set_sort_order(not evil_globals.unit_sort_direction)
 366                 elif col is self._unitValueColumn:
 367                         selectedUnitColumn = 1
 368                         self._unitNameColumn.set_sort_indicator(False)
 369                         self._unitValueColumn.set_sort_indicator(True)
 370                         self._unitSymbolColumn.set_sort_indicator(False)
 371                         self._unitValueColumn.set_sort_order(not evil_globals.value_sort_direction)
 372                 elif col is self._unitSymbolColumn:
 373                         selectedUnitColumn = 2
 374                         self._unitNameColumn.set_sort_indicator(False)
 375                         self._unitValueColumn.set_sort_indicator(False)
 376                         self._unitSymbolColumn.set_sort_indicator(True)
 377                         self._unitSymbolColumn.set_sort_order(not evil_globals.units_sort_direction)
 378                 else:
 379                         assert False, "Unknown column: %s" % (col.get_title(), )
 380
 381                 #declare a spot to hold the sorted list
 382                 sorted_list = []
 383
 384                 #point to the first row
 385                 iter = self._unitModel.get_iter_first()
 386                 row = 0
 387
 388                 while iter:
 389                         #grab all text from columns for sorting
 390
 391                         #get the text from each column
 392                         unit_text = self._unitModel.get_value(iter, 0)
 393                         units_text = self._unitModel.get_value(iter, 2)
 394
 395                         #do not bother sorting if the value column is empty
 396                         if self._unitModel.get_value(iter, 1) == '' and selectedUnitColumn == 1:
 397                                 return
 398
 399                         #special sorting exceptions for ascii values (instead of float values)
 400                         if evil_globals.selected_category == "Computer Numbers":
 401                                 value_text = self._unitModel.get_value(iter, 1)
 402                         else:
 403                                 if self._unitModel.get_value(iter, 1) == None or unit_model.get_value(iter, 1) == '':
 404                                         value_text = ''
 405                                 else:
 406                                         value_text = float(self._unitModel.get_value(iter, 1))
 407
 408                         if selectedUnitColumn == 0:
 409                                 sorted_list.append((unit_text, value_text, units_text))
 410                         elif selectedUnitColumn == 1:
 411                                 sorted_list.append((value_text, unit_text, units_text))
 412                         else:
 413                                 sorted_list.append((units_text, value_text, unit_text))
 414
 415                         #point to the next row in the self._unitModel
 416                         iter = self._unitModel.iter_next(iter)
 417                         row = row+1
 418
 419                 #check if no calculations have been made yet (don't bother sorting)
 420                 if row == 0:
 421                         return
 422                 else:
 423                         if selectedUnitColumn == 0:
 424                                 if not evil_globals.unit_sort_direction:
 425                                         sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(x), string.lower(y)))
 426                                         evil_globals.unit_sort_direction = True
 427                                 else:
 428                                         sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(y), string.lower(x)))
 429                                         evil_globals.unit_sort_direction = False
 430                         elif selectedUnitColumn == 1:
 431                                 sorted_list.sort()
 432                                 if not evil_globals.value_sort_direction:
 433                                         evil_globals.value_sort_direction = True
 434                                 else:
 435                                         sorted_list.reverse()
 436                                         evil_globals.value_sort_direction = False
 437                         else:
 438                                 if not evil_globals.units_sort_direction:
 439                                         sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(x), string.lower(y)))
 440                                         evil_globals.units_sort_direction = True
 441                                 else:
 442                                         sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(y), string.lower(x)))
 443                                         evil_globals.units_sort_direction = False
 444
 445                         #Clear out the previous list of units
 446                         self._unitModel = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING, gobject.TYPE_STRING)
 447                         self._unitsView.set_model(self._unitModel)
 448
 449                         #colourize each row differently for easier reading
 450                         self._unitsView.set_property('rules_hint', 1)
 451
 452                         #Clear out the description
 453                         text_model = gtk.TextBuffer(None)
 454                         self._unitDescription.set_buffer(text_model)
 455
 456                         if selectedUnitColumn == 0:
 457                                 for unit, value, units in sorted_list:
 458                                         iter = self._unitModel.append()
 459                                         self._unitModel.set(iter, 0, unit, 1, str(value), 2, units)
 460                         elif selectedUnitColumn == 1:
 461                                 for value, unit, units in sorted_list:
 462                                         iter = self._unitModel.append()
 463                                         self._unitModel.set(iter, 0, unit, 1, str(value), 2, units)
 464                         else:
 465                                 for units, value, unit in sorted_list:
 466                                         iter = self._unitModel.append()
 467                                         self._unitModel.set(iter, 0, unit, 1, str(value), 2, units)
 468                 return
 469
 470         def _on_click_category(self, row):
 471                 global unitDataInCategory, list_dic
 472
 473                 #Clear out the previous list of units
 474                 self._unitModel = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING, gobject.TYPE_STRING)
 475                 self._unitsView.set_model(self._unitModel)
 476
 477                 #Colourize each row alternately for easier reading
 478                 self._unitsView.set_property('rules_hint', 1)
 479
 480                 #Clear out the description
 481                 text_model = gtk.TextBuffer(None)
 482                 self._unitDescription.set_buffer(text_model)
 483
 484                 #Determine the contents of the selected category row
 485                 selected, iter = row.get_selection().get_selected()
 486
 487                 evil_globals.selected_category = self._categoryModel.get_value(iter, 0)
 488
 489                 evil_globals.unit_sort_direction = False
 490                 evil_globals.value_sort_direction = False
 491                 evil_globals.units_sort_direction = False
 492                 self._unitNameColumn.set_sort_indicator(False)
 493                 self._unitValueColumn.set_sort_indicator(False)
 494                 self._unitSymbolColumn.set_sort_indicator(False)
 495
 496                 unitDataInCategory = unit_data.list_dic[selected.get_value(iter, 0)]
 497                 keys = unitDataInCategory.keys()
 498                 keys.sort()
 499                 del keys[0] # do not display .base_unit description key
 500
 501                 #Fill up the units descriptions and clear the value cells
 502                 for key in keys:
 503                         iter = self._unitModel.append()
 504                         self._unitModel.set(iter, 0, key, 1, '', 2, unitDataInCategory[key][1])
 505
 506                 self._unitName.set_text('')
 507                 self._unitValue.set_text('')
 508                 self._previousUnitName.set_text('')
 509                 self._previousUnitValue.set_text('')
 510                 self._unitSymbol.set_text('')
 511                 self._previousUnitSymbol.set_text('')
 512
 513                 self.restore_units()
 514
 515         def restore_units(self):
 516                 global unitDataInCategory, list_dic
 517
 518                 # Restore the previous historical settings of previously selected units in this newly selected category
 519                 #Since category has just been clicked, the list will be sorted already.
 520                 if evil_globals.selected_category in evil_globals.selected_units:
 521                         if evil_globals.selected_units[evil_globals.selected_category][0]:
 522                                 ''"debug ''"
 523                                 #evil_globals.selected_units[evil_globals.selected_category] = [selected_unit, evil_globals.selected_units[evil_globals.selected_category][0]]
 524
 525                                 units = unit_data.list_dic[evil_globals.selected_category].keys()
 526                                 units.sort()
 527                                 del units[0] # do not display .base_unit description key
 528
 529                                 #Restore oldest selection first.
 530                                 if evil_globals.selected_units[evil_globals.selected_category][1]:
 531                                         unit_no = 0
 532                                         for unit in units:
 533                                                 if unit == evil_globals.selected_units[evil_globals.selected_category][1]:
 534                                                         self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
 535                                                 unit_no = unit_no+1
 536
 537                                 #Restore newest selection second.
 538                                 unit_no = 0
 539                                 for unit in units:
 540                                         if unit == evil_globals.selected_units[evil_globals.selected_category][0]:
 541                                                 self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
 542                                         unit_no = unit_no+1
 543
 544                 # select the text so user can start typing right away
 545                 self._unitValue.grab_focus()
 546                 self._unitValue.select_region(0, -1)
 547
 548         def _on_button_released(self, row, a):
 549                 self._on_click_unit(row)
 550
 551         def _on_click_unit(self, row):
 552                 evil_globals.calcsuppress = 1 #suppress calculations
 553
 554                 #Determine the contents of the selected row.
 555                 selected, iter = self._unitsView.get_selection().get_selected()
 556
 557                 selected_unit = selected.get_value(iter, 0)
 558
 559                 unit_spec = unitDataInCategory[selected_unit]
 560
 561                 #Clear out the description
 562                 text_model = gtk.TextBuffer(None)
 563                 self._unitDescription.set_buffer(text_model)
 564
 565                 enditer = text_model.get_end_iter()
 566                 text_model.insert(enditer, unit_spec[2])
 567
 568                 if self._unitName.get_text() != selected_unit:
 569                         self._previousUnitName.set_text(self._unitName.get_text())
 570                         self._previousUnitValue.set_text(self._unitValue.get_text())
 571                         if self._unitSymbol.get() == None:
 572                                 self._previousUnitSymbol.set_text('')
 573                         else:
 574                                 self._previousUnitSymbol.set_text(self._unitSymbol.get())
 575                 self._unitName.set_text(selected_unit)
 576
 577                 self._unitValue.set_text(selected.get_value(iter, 1))
 578
 579                 self._unitSymbol.set_text(unit_spec[1]) # put units into label text
 580                 if self._unitValue.get_text() == '':
 581                         if evil_globals.selected_category == "Computer Numbers":
 582                                 self._unitValue.set_text("0")
 583                         else:
 584                                 self._unitValue.set_text("0.0")
 585
 586                 #For historical purposes, record this unit as the most recent one in this category.
 587                 # Also, if a previous unit exists, then shift that previous unit to oldest unit.
 588                 if evil_globals.selected_category in evil_globals.selected_units:
 589                         if evil_globals.selected_units[evil_globals.selected_category][0]:
 590                                 evil_globals.selected_units[evil_globals.selected_category] = [selected_unit, evil_globals.selected_units[evil_globals.selected_category][0]]
 591                 else:
 592                         evil_globals.selected_units[evil_globals.selected_category] = [selected_unit, '']
 593
 594                 # select the text so user can start typing right away
 595                 self._unitValue.grab_focus()
 596                 self._unitValue.select_region(0, -1)
 597
 598                 evil_globals.calcsuppress = 0 #enable calculations
 599
 600         def _on_user_write_units(self, a):
 601                 ''"Write the list of categories and units to stdout for documentation purposes.''"
 602                 messagebox_model = gtk.TextBuffer(None)
 603                 messageboxtext.set_buffer(messagebox_model)
 604                 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)
 605                 messagebox.show()
 606                 while gtk.events_pending():
 607                         gtk.mainiteration(False)
 608                 category_keys = unit_data.list_dic.keys()
 609                 category_keys.sort()
 610                 total_categories = 0
 611                 total_units = 0
 612                 print 'gonvert-%s%s' % (
 613                         constants.__version__,
 614                         _(u' - Unit Conversion Utility  - Convertible units listing: ')
 615                 )
 616                 for category_key in category_keys:
 617                         total_categories = total_categories + 1
 618                         print category_key, ": "
 619                         unitDataInCategory = unit_data.list_dic[category_key]
 620                         unit_keys = unitDataInCategory.keys()
 621                         unit_keys.sort()
 622                         del unit_keys[0] # do not display .base_unit description key
 623                         for unit_key in unit_keys:
 624                                 total_units = total_units + 1
 625                                 print "\t", unit_key
 626                 print total_categories, ' categories'
 627                 print total_units, ' units'
 628                 messagebox_model = gtk.TextBuffer(None)
 629                 messageboxtext.set_buffer(messagebox_model)
 630                 messagebox_model.insert_at_cursor(_(u'The units list has been written to stdout. You can capture this printout by starting gonvert from the command line as follows: \n$ gonvert > file.txt'), -1)
 631
 632         def top(self, a):
 633                 global testvalue
 634
 635                 if evil_globals.calcsuppress == 1:
 636                         #evil_globals.calcsuppress = 0
 637                         return
 638                 # determine if value to be calculated is empty
 639                 if evil_globals.selected_category == "Computer Numbers":
 640                         if self._unitValue.get_text() == '':
 641                                 value = '0'
 642                         else:
 643                                 value = self._unitValue.get_text()
 644                 else:
 645                         if self._unitValue.get_text() == '':
 646                                 value = 0.0
 647                         else:
 648                                 value = float(self._unitValue.get_text())
 649
 650                 if self._unitName.get_text() != '':
 651                         func, arg = unitDataInCategory[self._unitName.get_text()][0] #retrieve the conversion function and value from the selected unit
 652                         base = apply(func.to_base, (value, arg, )) #determine the base unit value
 653
 654                         keys = unitDataInCategory.keys()
 655                         keys.sort()
 656                         del keys[0]
 657                         row = 0
 658
 659                         #point to the first row
 660                         iter = self._unitModel.get_iter_first()
 661
 662                         while iter:
 663                                 #get the formula from the name at the row
 664                                 func, arg = unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
 665
 666                                 #set the result in the value column
 667                                 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
 668
 669                                 #point to the next row in the self._unitModel
 670                                 iter = self._unitModel.iter_next(iter)
 671
 672                         # if the second row has a unit then update its value
 673                         if self._previousUnitName.get_text() != '':
 674                                 evil_globals.calcsuppress = 1
 675                                 func, arg = unitDataInCategory[self._previousUnitName.get_text()][0]
 676                                 self._previousUnitValue.set_text(str(apply(func.from_base, (base, arg, ))))
 677                                 evil_globals.calcsuppress = 0
 678
 679         def bottom(self, a):
 680                 if evil_globals.calcsuppress == 1:
 681                         #evil_globals.calcsuppress = 0
 682                         return
 683                 # determine if value to be calculated is empty
 684                 if evil_globals.selected_category == "Computer Numbers":
 685                         if self._previousUnitValue.get_text() == '':
 686                                 value = '0'
 687                         else:
 688                                 value = self._previousUnitValue.get_text()
 689                 else:
 690                         if self._previousUnitValue.get_text() == '':
 691                                 value = 0.0
 692                         else:
 693                                 value = float(self._previousUnitValue.get_text())
 694
 695                 if self._previousUnitName.get_text() != '':
 696                         func, arg = unitDataInCategory[self._previousUnitName.get_text()][0] #retrieve the conversion function and value from the selected unit
 697                         base = apply(func.to_base, (value, arg, )) #determine the base unit value
 698
 699                         keys = unitDataInCategory.keys()
 700                         keys.sort()
 701                         del keys[0]
 702                         row = 0
 703
 704                         #point to the first row
 705                         iter = self._unitModel.get_iter_first()
 706
 707                         while iter:
 708                                 #get the formula from the name at the row
 709                                 func, arg = unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
 710
 711                                 #set the result in the value column
 712                                 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
 713
 714                                 #point to the next row in the self._unitModel
 715                                 iter = self._unitModel.iter_next(iter)
 716
 717                         # if the second row has a unit then update its value
 718                         if self._unitName.get_text() != '':
 719                                 evil_globals.calcsuppress = 1
 720                                 func, arg = unitDataInCategory[self._unitName.get_text()][0]
 721                                 self._unitValue.set_text(str(apply(func.from_base, (base, arg, ))))
 722                                 evil_globals.calcsuppress = 0
 723
 724
 725 def main():
 726         logging.basicConfig(level = logging.DEBUG)
 727         try:
 728                 os.makedirs(constants._data_path_)
 729         except OSError, e:
 730                 if e.errno != 17:
 731                         raise
 732
 733         gonvert = Gonvert()
 734         gtk.main()
 735
 736
 737 if __name__ == "__main__":
 738         main()