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