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 unit_data
  18
  19
  20 _moduleLogger = logging.getLogger("gonvert_glade")
  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._calcsuppress = False
  44                 self._unit_sort_direction = False
  45                 self._value_sort_direction = False
  46                 self._units_sort_direction = False
  47
  48                 self._find_result = [] # empty find result list
  49                 self._find_count = 0 # default to find result number zero
  50
  51                 self._selected_category = '' # preset to no selected category
  52                 self._selected_units = {} # 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                         return
  64
  65                 self._mainWindow = widgets.get_widget('mainWindow')
  66
  67                 change_menu_label(widgets, 'fileMenuItem', _('File'))
  68                 change_menu_label(widgets, 'exitMenuItem', _('Exit'))
  69                 change_menu_label(widgets, 'toolsMenuItem', _('Tools'))
  70                 change_menu_label(widgets, 'clearSelectionMenuItem', _('Clear selections'))
  71                 change_menu_label(widgets, 'writeUnitsMenuItem', _('Write Units'))
  72                 change_menu_label(widgets, 'helpMenuItem', _('Help'))
  73                 change_menu_label(widgets, 'aboutMenuItem', _('About'))
  74                 change_menu_label(widgets, 'findButton', _('Find'))
  75
  76                 self._shortlistcheck = widgets.get_widget('shortlistcheck')
  77                 self._toggleShortList = widgets.get_widget('toggleShortList')
  78
  79                 self._categoryView = widgets.get_widget('categoryView')
  80
  81                 self._unitsView = widgets.get_widget('unitsView')
  82                 self._unitsView_selection = self._unitsView.get_selection()
  83
  84                 self._unitName = widgets.get_widget('unitName')
  85                 self._unitValue = widgets.get_widget('unitValue')
  86                 self._previousUnitName = widgets.get_widget('previousUnitName')
  87                 self._previousUnitValue = widgets.get_widget('previousUnitValue')
  88                 messagebox = widgets.get_widget('msgbox')
  89                 messageboxtext = widgets.get_widget('msgboxtext')
  90
  91                 self._unitSymbol = widgets.get_widget('unitSymbol')
  92                 self._previousUnitSymbol = widgets.get_widget('previousUnitSymbol')
  93
  94                 self._unitDescription = widgets.get_widget('unitDescription')
  95
  96                 self._findEntry = widgets.get_widget('findEntry')
  97                 self._findLabel = widgets.get_widget('findLabel')
  98                 findButton = widgets.get_widget('findButton')
  99
 100                 #insert a self._categoryColumnumn into the units list even though the heading will not be seen
 101                 renderer = gtk.CellRendererText()
 102                 self._unitNameColumn = gtk.TreeViewColumn(_('Unit Name'), renderer)
 103                 self._unitNameColumn.set_property('resizable', 1)
 104                 self._unitNameColumn.add_attribute(renderer, 'text', 0)
 105                 self._unitNameColumn.set_clickable(True)
 106                 self._unitNameColumn.connect("clicked", self._on_click_unit_column)
 107                 self._unitsView.append_column(self._unitNameColumn)
 108
 109                 self._unitValueColumn = gtk.TreeViewColumn(_('Value'), renderer)
 110                 self._unitValueColumn.set_property('resizable', 1)
 111                 self._unitValueColumn.add_attribute(renderer, 'text', 1)
 112                 self._unitValueColumn.set_clickable(True)
 113                 self._unitValueColumn.connect("clicked", self._on_click_unit_column)
 114                 self._unitsView.append_column(self._unitValueColumn)
 115
 116                 self._unitSymbolColumn = gtk.TreeViewColumn(_('Units'), renderer)
 117                 self._unitSymbolColumn.set_property('resizable', 1)
 118                 self._unitSymbolColumn.add_attribute(renderer, 'text', 2)
 119                 self._unitSymbolColumn.set_clickable(True)
 120                 self._unitSymbolColumn.connect("clicked", self._on_click_unit_column)
 121                 self._unitsView.append_column(self._unitSymbolColumn)
 122
 123                 #Insert a column into the category list even though the heading will not be seen
 124                 renderer = gtk.CellRendererText()
 125                 self._categoryColumn = gtk.TreeViewColumn('Title', renderer)
 126                 self._categoryColumn.set_property('resizable', 1)
 127                 self._categoryColumn.add_attribute(renderer, 'text', 0)
 128                 self._categoryView.append_column(self._categoryColumn)
 129
 130                 self._categoryModel = gtk.ListStore(gobject.TYPE_STRING)
 131                 self._categoryView.set_model(self._categoryModel)
 132                 #colourize each row differently for easier reading
 133                 self._categoryView.set_property('rules_hint', 1)
 134
 135                 #Populate the catagories list
 136                 keys = unit_data.list_dic.keys()
 137                 keys.sort()
 138                 for key in keys:
 139                         iter = self._categoryModel.append()
 140                         self._categoryModel.set(iter, 0, key)
 141
 142                 ToolTips = gtk.Tooltips()
 143                 ToolTips.set_tip(findButton, _(u'Find unit (F6)'))
 144
 145                 #--------- connections to GUI ----------------
 146                 dic = {
 147                         "on_exit_menu_activate": self._on_user_exit,
 148                         "on_main_window_destroy": self._on_user_exit,
 149                         "on_categoryView_select_row": self._on_click_category,
 150                         "on_unitsView__on_click_unit_column": self._on_click_unit_column,
 151                         "on_unitValue_changed": self.top,
 152                         "on_previousUnitValue_changed": self.bottom,
 153                         "on_writeUnitsMenuItem_activate": self._on_user_write_units,
 154                         "on_findButton_clicked": self._on_user_find_units,
 155                         "on_findEntry_key_press_event": self._on_find_key_press,
 156                         "on_findEntry_changed": self._findEntry_changed,
 157                         "on_aboutMenuItem_activate": self._on_about_clicked,
 158                         "on_messagebox_ok_clicked": self.messagebox_ok_clicked,
 159                         "on_clearSelectionMenuItem_activate": self._on_user_clear_selections,
 160                         "on_unitsView_cursor_changed": self._on_click_unit,
 161                         "on_unitsView_button_released": self._on_button_released,
 162                         "on_shortlistcheck_toggled": self._on_shortlist_changed,
 163                         "on_toggleShortList_activate": self._on_edit_shortlist,
 164                 }
 165                 widgets.signal_autoconnect(dic)
 166
 167                 self._mainWindow.set_title('gonvert- %s - Unit Conversion Utility' % constants.__version__)
 168                 iconPath = pixmapspath + '/gonvert.png'
 169                 if os.path.exists(iconPath):
 170                         self._mainWindow.set_icon(gtk.gdk.pixbuf_new_from_file(iconPath))
 171                 else:
 172                         _moduleLogger.warn("Error: Could not find gonvert icon: %s" % iconPath)
 173
 174                 #Restore window size from previously saved settings if it exists and is valid.
 175                 windowDatPath = "/".join((constants._data_path_, "window.dat"))
 176                 if os.path.exists(windowDatPath):
 177                         #Retrieving previous window settings from ~/.gonvert/window.dat
 178                         saved_window = pickle.load(open(windowDatPath, "r"))
 179                         #If the 'size' has been stored, then extract size from saved_window.
 180                         if 'size' in saved_window:
 181                                 a, b = saved_window['size']
 182                                 self._mainWindow.resize(a, b)
 183                         else:
 184                                 #Maximize if no previous size was found
 185                                 #self._mainWindow.maximize()
 186                                 pass
 187                 else:
 188                         #Maximize if no previous window.dat file was found
 189                         #self._mainWindow.maximize()
 190                         pass
 191
 192                 #Restore selections from previously saved settings if it exists and is valid.
 193                 historical_catergory_found = False
 194                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 195                 if os.path.exists(selectionsDatPath):
 196                         #Retrieving previous selections from ~/.gonvert/selections.dat
 197                         selections = pickle.load(open(selectionsDatPath, 'r'))
 198                         #Restoring previous selections.
 199                         #
 200                         #Make a list of categories to determine which one to select
 201                         categories = unit_data.list_dic.keys()
 202                         categories.sort()
 203                         #
 204                         #If the 'selected_unts' has been stored, then extract self._selected_units from selections.
 205                         if 'selected_units' in selections:
 206                                 self._selected_units = selections['selected_units']
 207                         #Make sure that the 'self._selected_category' has been stored.
 208                         if 'selected_category' in selections:
 209                                 #Match an available category to the previously selected category.
 210                                 for counter in range(len(categories)):
 211                                         if selections['selected_category'] == categories[counter]:
 212                                                 # Restore the previously selected category.
 213                                                 self._categoryView.set_cursor(counter, self._categoryColumn, False)
 214                                                 self._categoryView.grab_focus()
 215                                 historical_catergory_found = True
 216
 217                 if not historical_catergory_found:
 218                         print "Couldn't find saved category, using default."
 219                         #If historical records were not kept then default to
 220                         # put the focus on the first category
 221                         self._categoryView.set_cursor(0, self._categoryColumn, False)
 222                         self._categoryView.grab_focus()
 223
 224                 self.restore_units()
 225
 226         def _on_shortlist_changed(self, a):
 227                 raise NotImplementedError("%s" % self._shortlistcheck.get_active())
 228
 229         def _on_edit_shortlist(self, a):
 230                 raise NotImplementedError("%s" % self._toggleShortList.get_active())
 231
 232         def _on_user_clear_selections(self, a):
 233                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 234                 os.remove(selectionsDatPath)
 235                 self._selected_units = {}
 236
 237         def _on_user_exit(self, a):
 238                 """
 239                 This routine saves the selections to a file, and
 240                 should therefore only be called when exiting the program.
 241
 242                 Update selections dictionary which consists of the following keys:
 243                 'self._selected_category': full name of selected category
 244                 'self._selected_units': self._selected_units dictionary which contains:
 245                 [categoryname: #1 displayed unit, #2 displayed unit]
 246                 """
 247                 #Determine the contents of the selected category row
 248                 selected, iter = self._categoryView.get_selection().get_selected()
 249                 self._selected_category = self._categoryModel.get_value(iter, 0)
 250
 251                 selections = {
 252                         'selected_category': self._selected_category,
 253                         'selected_units': self._selected_units
 254                 }
 255                 selectionsDatPath = "/".join((constants._data_path_, "selections.dat"))
 256                 pickle.dump(selections, open(selectionsDatPath, 'w'))
 257
 258                 #Get last size of app and save it
 259                 window_settings = {
 260                         'size': self._mainWindow.get_size()
 261                 }
 262                 windowDatPath = "/".join((constants._data_path_, "window.dat"))
 263                 pickle.dump(window_settings, open(windowDatPath, 'w'))
 264
 265                 gtk.mainquit
 266                 sys.exit()
 267
 268         def _findEntry_changed(self, a):
 269                 #Clear out find results since the user wants to look for something new
 270                 self._find_result = [] #empty find result list
 271                 self._find_count = 0 #default to find result number zero
 272                 self._findLabel.set_text('') #clear result
 273
 274         def _on_find_key_press(self, a, b):
 275                 #Check if the key pressed was an ASCII key
 276                 if len(b.string)>0:
 277                         #Check if the key pressed was the 'Enter' key
 278                         if ord(b.string[0]) == 13:
 279                                 #Execute the find units function
 280                                 self._on_user_find_units(1)
 281
 282         def _on_about_clicked(self, a):
 283                 dlg = gtk.AboutDialog()
 284                 dlg.set_name(constants.__pretty_app_name__)
 285                 dlg.set_version("%s-%d" % (constants.__version__, constants.__build__))
 286                 dlg.set_copyright("Copyright 2009 - GPL")
 287                 dlg.set_comments("")
 288                 dlg.set_website("http://unihedron.com/projects/gonvert/gonvert.php")
 289                 dlg.set_authors(["Anthony Tekatch <anthony@unihedron.com>", "Ed Page <edpage@byu.net>"])
 290                 dlg.run()
 291                 dlg.destroy()
 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                 #         = self._find_count = 0 and self._find_result = []
 301
 302                 #last-find = restart from top again
 303                 #          = self._find_count = len(self._find_result)
 304
 305                 #next-find = continue to next found location
 306                 #           = self._find_count = 0 and len(self._find_result)>0
 307
 308                 #check for new-find
 309                 if len(self._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                                                         self._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                                         self._find_count = 0
 333                                         #check if next find is in a new category (prevent category changes when unnecessary
 334                                         if self._selected_category != self._find_result[self._find_count][0]:
 335                                                 self._categoryView.set_cursor(self._find_result[0][2], self._categoryColumn, False)
 336                                                 self._unitsView.set_cursor(self._find_result[0][3], self._unitNameColumn, True)
 337                                                 if len(self._find_result)>1:
 338                                                         self._findLabel.set_text(('Press Find for next unit. '+ str(len(self._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 self._find_count == len(self._find_result)-1:
 344                                 #select first result
 345                                 self._find_count = 0
 346                                 self._categoryView.set_cursor(self._find_result[self._find_count][2], self._categoryColumn, False)
 347                                 self._unitsView.set_cursor(self._find_result[self._find_count][3], self._unitNameColumn, True)
 348                         else: #must be next-find
 349                                 self._find_count = self._find_count+1
 350                                 #check if next find is in a new category (prevent category changes when unnecessary
 351                                 if self._selected_category != self._find_result[self._find_count][0]:
 352                                         self._categoryView.set_cursor(self._find_result[self._find_count][2], self._categoryColumn, False)
 353                                 self._unitsView.set_cursor(self._find_result[self._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 self._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 self._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 self._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 self._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 self._unit_sort_direction:
 425                                         sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(x), string.lower(y)))
 426                                         self._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                                         self._unit_sort_direction = False
 430                         elif selectedUnitColumn == 1:
 431                                 sorted_list.sort()
 432                                 if not self._value_sort_direction:
 433                                         self._value_sort_direction = True
 434                                 else:
 435                                         sorted_list.reverse()
 436                                         self._value_sort_direction = False
 437                         else:
 438                                 if not self._units_sort_direction:
 439                                         sorted_list.sort(lambda (x, xx, xxx), (y, yy, yyy): cmp(string.lower(x), string.lower(y)))
 440                                         self._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                                         self._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                 #Clear out the previous list of units
 472                 self._unitModel = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING, gobject.TYPE_STRING)
 473                 self._unitsView.set_model(self._unitModel)
 474
 475                 #Colourize each row alternately for easier reading
 476                 self._unitsView.set_property('rules_hint', 1)
 477
 478                 #Clear out the description
 479                 text_model = gtk.TextBuffer(None)
 480                 self._unitDescription.set_buffer(text_model)
 481
 482                 #Determine the contents of the selected category row
 483                 selected, iter = row.get_selection().get_selected()
 484
 485                 self._selected_category = self._categoryModel.get_value(iter, 0)
 486
 487                 self._unit_sort_direction = False
 488                 self._value_sort_direction = False
 489                 self._units_sort_direction = False
 490                 self._unitNameColumn.set_sort_indicator(False)
 491                 self._unitValueColumn.set_sort_indicator(False)
 492                 self._unitSymbolColumn.set_sort_indicator(False)
 493
 494                 self._unitDataInCategory = unit_data.list_dic[selected.get_value(iter, 0)]
 495                 keys = self._unitDataInCategory.keys()
 496                 keys.sort()
 497                 del keys[0] # do not display .base_unit description key
 498
 499                 #Fill up the units descriptions and clear the value cells
 500                 for key in keys:
 501                         iter = self._unitModel.append()
 502                         self._unitModel.set(iter, 0, key, 1, '', 2, self._unitDataInCategory[key][1])
 503
 504                 self._unitName.set_text('')
 505                 self._unitValue.set_text('')
 506                 self._previousUnitName.set_text('')
 507                 self._previousUnitValue.set_text('')
 508                 self._unitSymbol.set_text('')
 509                 self._previousUnitSymbol.set_text('')
 510
 511                 self.restore_units()
 512
 513         def restore_units(self):
 514                 # Restore the previous historical settings of previously selected units in this newly selected category
 515                 #Since category has just been clicked, the list will be sorted already.
 516                 if self._selected_category in self._selected_units:
 517                         if self._selected_units[self._selected_category][0]:
 518                                 ''"debug ''"
 519                                 #self._selected_units[self._selected_category] = [selected_unit, self._selected_units[self._selected_category][0]]
 520
 521                                 units = unit_data.list_dic[self._selected_category].keys()
 522                                 units.sort()
 523                                 del units[0] # do not display .base_unit description key
 524
 525                                 #Restore oldest selection first.
 526                                 if self._selected_units[self._selected_category][1]:
 527                                         unit_no = 0
 528                                         for unit in units:
 529                                                 if unit == self._selected_units[self._selected_category][1]:
 530                                                         self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
 531                                                 unit_no = unit_no+1
 532
 533                                 #Restore newest selection second.
 534                                 unit_no = 0
 535                                 for unit in units:
 536                                         if unit == self._selected_units[self._selected_category][0]:
 537                                                 self._unitsView.set_cursor(unit_no, self._unitNameColumn, True)
 538                                         unit_no = unit_no+1
 539
 540                 # select the text so user can start typing right away
 541                 self._unitValue.grab_focus()
 542                 self._unitValue.select_region(0, -1)
 543
 544         def _on_button_released(self, row, a):
 545                 self._on_click_unit(row)
 546
 547         def _on_click_unit(self, row):
 548                 self._calcsuppress = True #suppress calculations
 549
 550                 #Determine the contents of the selected row.
 551                 selected, iter = self._unitsView.get_selection().get_selected()
 552
 553                 selected_unit = selected.get_value(iter, 0)
 554
 555                 unit_spec = self._unitDataInCategory[selected_unit]
 556
 557                 #Clear out the description
 558                 text_model = gtk.TextBuffer(None)
 559                 self._unitDescription.set_buffer(text_model)
 560
 561                 enditer = text_model.get_end_iter()
 562                 text_model.insert(enditer, unit_spec[2])
 563
 564                 if self._unitName.get_text() != selected_unit:
 565                         self._previousUnitName.set_text(self._unitName.get_text())
 566                         self._previousUnitValue.set_text(self._unitValue.get_text())
 567                         if self._unitSymbol.get() == None:
 568                                 self._previousUnitSymbol.set_text('')
 569                         else:
 570                                 self._previousUnitSymbol.set_text(self._unitSymbol.get())
 571                 self._unitName.set_text(selected_unit)
 572
 573                 self._unitValue.set_text(selected.get_value(iter, 1))
 574
 575                 self._unitSymbol.set_text(unit_spec[1]) # put units into label text
 576                 if self._unitValue.get_text() == '':
 577                         if self._selected_category == "Computer Numbers":
 578                                 self._unitValue.set_text("0")
 579                         else:
 580                                 self._unitValue.set_text("0.0")
 581
 582                 #For historical purposes, record this unit as the most recent one in this category.
 583                 # Also, if a previous unit exists, then shift that previous unit to oldest unit.
 584                 if self._selected_category in self._selected_units:
 585                         if self._selected_units[self._selected_category][0]:
 586                                 self._selected_units[self._selected_category] = [selected_unit, self._selected_units[self._selected_category][0]]
 587                 else:
 588                         self._selected_units[self._selected_category] = [selected_unit, '']
 589
 590                 # select the text so user can start typing right away
 591                 self._unitValue.grab_focus()
 592                 self._unitValue.select_region(0, -1)
 593
 594                 self._calcsuppress = False #enable calculations
 595
 596         def _on_user_write_units(self, a):
 597                 ''"Write the list of categories and units to stdout for documentation purposes.''"
 598                 messagebox_model = gtk.TextBuffer(None)
 599                 messageboxtext.set_buffer(messagebox_model)
 600                 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)
 601                 messagebox.show()
 602                 while gtk.events_pending():
 603                         gtk.mainiteration(False)
 604                 category_keys = unit_data.list_dic.keys()
 605                 category_keys.sort()
 606                 total_categories = 0
 607                 total_units = 0
 608                 print 'gonvert-%s%s' % (
 609                         constants.__version__,
 610                         _(u' - Unit Conversion Utility  - Convertible units listing: ')
 611                 )
 612                 for category_key in category_keys:
 613                         total_categories = total_categories + 1
 614                         print category_key, ": "
 615                         self._unitDataInCategory = unit_data.list_dic[category_key]
 616                         unit_keys = self._unitDataInCategory.keys()
 617                         unit_keys.sort()
 618                         del unit_keys[0] # do not display .base_unit description key
 619                         for unit_key in unit_keys:
 620                                 total_units = total_units + 1
 621                                 print "\t", unit_key
 622                 print total_categories, ' categories'
 623                 print total_units, ' units'
 624                 messagebox_model = gtk.TextBuffer(None)
 625                 messageboxtext.set_buffer(messagebox_model)
 626                 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)
 627
 628         def top(self, a):
 629                 if self._calcsuppress:
 630                         #self._calcsuppress = False
 631                         return
 632                 # determine if value to be calculated is empty
 633                 if self._selected_category == "Computer Numbers":
 634                         if self._unitValue.get_text() == '':
 635                                 value = '0'
 636                         else:
 637                                 value = self._unitValue.get_text()
 638                 else:
 639                         if self._unitValue.get_text() == '':
 640                                 value = 0.0
 641                         else:
 642                                 value = float(self._unitValue.get_text())
 643
 644                 if self._unitName.get_text() != '':
 645                         func, arg = self._unitDataInCategory[self._unitName.get_text()][0] #retrieve the conversion function and value from the selected unit
 646                         base = apply(func.to_base, (value, arg, )) #determine the base unit value
 647
 648                         keys = self._unitDataInCategory.keys()
 649                         keys.sort()
 650                         del keys[0]
 651                         row = 0
 652
 653                         #point to the first row
 654                         iter = self._unitModel.get_iter_first()
 655
 656                         while iter:
 657                                 #get the formula from the name at the row
 658                                 func, arg = self._unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
 659
 660                                 #set the result in the value column
 661                                 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
 662
 663                                 #point to the next row in the self._unitModel
 664                                 iter = self._unitModel.iter_next(iter)
 665
 666                         # if the second row has a unit then update its value
 667                         if self._previousUnitName.get_text() != '':
 668                                 self._calcsuppress = True
 669                                 func, arg = self._unitDataInCategory[self._previousUnitName.get_text()][0]
 670                                 self._previousUnitValue.set_text(str(apply(func.from_base, (base, arg, ))))
 671                                 self._calcsuppress = False
 672
 673         def bottom(self, a):
 674                 if self._calcsuppress == True:
 675                         #self._calcsuppress = False
 676                         return
 677                 # determine if value to be calculated is empty
 678                 if self._selected_category == "Computer Numbers":
 679                         if self._previousUnitValue.get_text() == '':
 680                                 value = '0'
 681                         else:
 682                                 value = self._previousUnitValue.get_text()
 683                 else:
 684                         if self._previousUnitValue.get_text() == '':
 685                                 value = 0.0
 686                         else:
 687                                 value = float(self._previousUnitValue.get_text())
 688
 689                 if self._previousUnitName.get_text() != '':
 690                         func, arg = self._unitDataInCategory[self._previousUnitName.get_text()][0] #retrieve the conversion function and value from the selected unit
 691                         base = apply(func.to_base, (value, arg, )) #determine the base unit value
 692
 693                         keys = self._unitDataInCategory.keys()
 694                         keys.sort()
 695                         del keys[0]
 696                         row = 0
 697
 698                         #point to the first row
 699                         iter = self._unitModel.get_iter_first()
 700
 701                         while iter:
 702                                 #get the formula from the name at the row
 703                                 func, arg = self._unitDataInCategory[self._unitModel.get_value(iter, 0)][0]
 704
 705                                 #set the result in the value column
 706                                 self._unitModel.set(iter, 1, str(apply(func.from_base, (base, arg, ))))
 707
 708                                 #point to the next row in the self._unitModel
 709                                 iter = self._unitModel.iter_next(iter)
 710
 711                         # if the second row has a unit then update its value
 712                         if self._unitName.get_text() != '':
 713                                 self._calcsuppress = True
 714                                 func, arg = self._unitDataInCategory[self._unitName.get_text()][0]
 715                                 self._unitValue.set_text(str(apply(func.from_base, (base, arg, ))))
 716                                 self._calcsuppress = False
 717
 718
 719 def main():
 720         logging.basicConfig(level = logging.DEBUG)
 721         try:
 722                 os.makedirs(constants._data_path_)
 723         except OSError, e:
 724                 if e.errno != 17:
 725                         raise
 726
 727         gonvert = Gonvert()
 728         gtk.main()
 729
 730
 731 if __name__ == "__main__":
 732         main()