git.maemo.org Git - gonvert/blob - src/gonvert_qt.py

   1 #!/usr/bin/env python
   2 # -*- coding: UTF8 -*-
   3
   4 from __future__ import with_statement
   5
   6 import sys
   7 import os
   8 import math
   9 import logging
  10
  11 from PyQt4 import QtGui
  12 from PyQt4 import QtCore
  13
  14 import constants
  15 from util import misc as misc_utils
  16 import unit_data
  17
  18 try:
  19         import gettext
  20 except ImportError:
  21         _ = lambda x: x
  22         gettext = None
  23 else:
  24         _ = gettext.gettext
  25
  26
  27 _moduleLogger = logging.getLogger("gonvert_glade")
  28
  29 if gettext is not None:
  30         gettext.bindtextdomain('gonvert', '/usr/share/locale')
  31         gettext.textdomain('gonvert')
  32
  33
  34 def change_menu_label(widgets, labelname, newtext):
  35         item_label = widgets.get_widget(labelname).get_children()[0]
  36         item_label.set_text(newtext)
  37
  38
  39 def split_number(number):
  40         try:
  41                 fractional, integer = math.modf(number)
  42         except TypeError:
  43                 integerDisplay = number
  44                 fractionalDisplay = ""
  45         else:
  46                 integerDisplay = str(integer)
  47                 fractionalDisplay = str(fractional)
  48                 if "e+" in integerDisplay:
  49                         integerDisplay = number
  50                         fractionalDisplay = ""
  51                 elif "e-" in fractionalDisplay and 0.0 < integer:
  52                         integerDisplay = number
  53                         fractionalDisplay = ""
  54                 elif "e-" in fractionalDisplay:
  55                         integerDisplay = ""
  56                         fractionalDisplay = number
  57                 else:
  58                         integerDisplay = integerDisplay.split(".", 1)[0] + "."
  59                         fractionalDisplay = fractionalDisplay.rsplit(".", 1)[-1]
  60
  61         return integerDisplay, fractionalDisplay
  62
  63
  64 class Gonvert(object):
  65
  66         _DATA_PATHS = [
  67                 os.path.dirname(__file__),
  68                 os.path.join(os.path.dirname(__file__), "../data"),
  69                 os.path.join(os.path.dirname(__file__), "../lib"),
  70                 '/usr/share/gonvert',
  71                 '/usr/lib/gonvert',
  72         ]
  73
  74         def __init__(self):
  75                 self._dataPath = ""
  76                 for dataPath in self._DATA_PATHS:
  77                         appIconPath = os.path.join(dataPath, "pixmaps", "gonvert.png")
  78                         if os.path.isfile(appIconPath):
  79                                 self._dataPath = dataPath
  80                                 break
  81                 else:
  82                         raise RuntimeError("UI Descriptor not found!")
  83
  84                 self._catWindow = CategoryWindow(None, appIconPath)
  85
  86
  87 class CategoryWindow(object):
  88
  89         def __init__(self, parent, appIconPath):
  90                 self._appIconPath = appIconPath
  91                 self._unitWindows = []
  92
  93                 self._categories = QtGui.QTreeWidget()
  94                 self._categories.setHeaderLabels(["Categories"])
  95                 self._categories.itemClicked.connect(self._on_category_clicked)
  96                 for catName in unit_data.UNIT_CATEGORIES:
  97                         twi = QtGui.QTreeWidgetItem(self._categories)
  98                         twi.setText(0, catName)
  99
 100                 self._layout = QtGui.QVBoxLayout()
 101                 self._layout.addWidget(self._categories)
 102
 103                 centralWidget = QtGui.QWidget()
 104                 centralWidget.setLayout(self._layout)
 105
 106                 self._window = QtGui.QMainWindow(parent)
 107                 if parent is not None:
 108                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 109                 self._window.setWindowTitle("%s - Categories" % constants.__pretty_app_name__)
 110                 self._window.setWindowIcon(QtGui.QIcon(appIconPath))
 111                 self._window.setCentralWidget(centralWidget)
 112
 113                 self._window.show()
 114
 115         @misc_utils.log_exception(_moduleLogger)
 116         def _on_category_clicked(self, item, columnIndex):
 117                 categoryName = unicode(item.text(0))
 118                 unitWindow = UnitWindow(self._window, categoryName, self._appIconPath)
 119                 self._unitWindows = [unitWindow]
 120
 121
 122 class UnitData(object):
 123
 124         HEADERS = ["Name", "Value", "", "Unit"]
 125         ALIGNMENT = [QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignLeft, QtCore.Qt.AlignLeft]
 126
 127         def __init__(self, name, unit, description, conversion):
 128                 self._name = name
 129                 self._unit = unit
 130                 self._description = description
 131                 self._conversion = conversion
 132
 133                 self._value = 0.0
 134                 self._integerDisplay, self._fractionalDisplay = split_number(self._value)
 135
 136         @property
 137         def name(self):
 138                 return self._name
 139
 140         @property
 141         def value(self):
 142                 return self._value
 143
 144         def update_value(self, newValue):
 145                 self._value = newValue
 146                 self._integerDisplay, self._fractionalDisplay = split_number(newValue)
 147
 148         @property
 149         def unit(self):
 150                 return self._unit
 151
 152         @property
 153         def conversion(self):
 154                 return self._conversion
 155
 156         def data(self, column):
 157                 try:
 158                         return [self._name, self._integerDisplay, self._fractionalDisplay, self._unit][column]
 159                 except IndexError:
 160                         return None
 161
 162
 163 class UnitModel(QtCore.QAbstractItemModel):
 164
 165         def __init__(self, categoryName, parent=None):
 166                 super(UnitModel, self).__init__(parent)
 167                 self._categoryName = categoryName
 168                 self._unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
 169
 170                 self._children = []
 171                 for key in unit_data.get_units(self._categoryName):
 172                         conversion, unit, description = self._unitData[key]
 173                         self._children.append(UnitData(key, unit, description, conversion))
 174
 175         @misc_utils.log_exception(_moduleLogger)
 176         def columnCount(self, parent):
 177                 if parent.isValid():
 178                         return 0
 179                 else:
 180                         return len(UnitData.HEADERS)
 181
 182         @misc_utils.log_exception(_moduleLogger)
 183         def data(self, index, role):
 184                 if not index.isValid():
 185                         return None
 186                 elif role == QtCore.Qt.TextAlignmentRole:
 187                         return UnitData.ALIGNMENT[index.column()]
 188                 elif role != QtCore.Qt.DisplayRole:
 189                         return None
 190
 191                 item = index.internalPointer()
 192                 if isinstance(item, UnitData):
 193                         return item.data(index.column())
 194                 elif item is UnitData.HEADERS:
 195                         return item[index.column()]
 196
 197         @misc_utils.log_exception(_moduleLogger)
 198         def flags(self, index):
 199                 if not index.isValid():
 200                         return QtCore.Qt.NoItemFlags
 201
 202                 return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
 203
 204         @misc_utils.log_exception(_moduleLogger)
 205         def headerData(self, section, orientation, role):
 206                 if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
 207                         return UnitData.HEADERS[section]
 208
 209                 return None
 210
 211         @misc_utils.log_exception(_moduleLogger)
 212         def index(self, row, column, parent):
 213                 if not self.hasIndex(row, column, parent):
 214                         return QtCore.QModelIndex()
 215
 216                 if parent.isValid():
 217                         return QtCore.QModelIndex()
 218
 219                 parentItem = UnitData.HEADERS
 220                 childItem = self._children[row]
 221                 if childItem:
 222                         return self.createIndex(row, column, childItem)
 223                 else:
 224                         return QtCore.QModelIndex()
 225
 226         @misc_utils.log_exception(_moduleLogger)
 227         def parent(self, index):
 228                 if not index.isValid():
 229                         return QtCore.QModelIndex()
 230
 231                 childItem = index.internalPointer()
 232                 if isinstance(childItem, UnitData):
 233                         return QtCore.QModelIndex()
 234                 elif childItem is UnitData.HEADERS:
 235                         return None
 236
 237         @misc_utils.log_exception(_moduleLogger)
 238         def rowCount(self, parent):
 239                 if 0 < parent.column():
 240                         return 0
 241
 242                 if not parent.isValid():
 243                         return len(self._children)
 244                 else:
 245                         return len(self._children)
 246
 247         def get_unit(self, index):
 248                 return self._children[index]
 249
 250         def update_values(self, fromIndex, userInput):
 251                 value = self._sanitize_value(userInput)
 252                 func, arg = self._children[fromIndex].conversion
 253                 base = func.to_base(value, arg)
 254                 for i, child in enumerate(self._children):
 255                         if i == fromIndex:
 256                                 continue
 257                         func, arg = child.conversion
 258                         newValue = func.from_base(base, arg)
 259                         child.update_value(newValue)
 260
 261                 topLeft = self.createIndex(0, 1, self._children[0])
 262                 bottomRight = self.createIndex(len(self._children)-1, 2, self._children[-1])
 263                 self.dataChanged.emit(topLeft, bottomRight)
 264
 265         def _sanitize_value(self, userEntry):
 266                 if self._categoryName == "Computer Numbers":
 267                         if userEntry == '':
 268                                 value = '0'
 269                         else:
 270                                 value = userEntry
 271                 else:
 272                         if userEntry == '':
 273                                 value = 0.0
 274                         else:
 275                                 value = float(userEntry)
 276                 return value
 277
 278
 279 class UnitWindow(object):
 280
 281         def __init__(self, parent, category, appIconPath):
 282                 self._categoryName = category
 283                 self._selectedIndex = 0
 284
 285                 self._selectedUnitName = QtGui.QLabel()
 286                 self._selectedUnitValue = QtGui.QLineEdit()
 287                 self._selectedUnitValue.textEdited.connect(self._on_value_edited)
 288                 self._selectedUnitValue.editingFinished.connect(self._on_value_edited)
 289                 self._selectedUnitSymbol = QtGui.QLabel()
 290
 291                 self._selectedUnitLayout = QtGui.QHBoxLayout()
 292                 self._selectedUnitLayout.addWidget(self._selectedUnitName)
 293                 self._selectedUnitLayout.addWidget(self._selectedUnitValue)
 294                 self._selectedUnitLayout.addWidget(self._selectedUnitSymbol)
 295
 296                 self._unitsModel = UnitModel(self._categoryName)
 297                 self._unitsView = QtGui.QTreeView()
 298                 self._unitsView.setModel(self._unitsModel)
 299                 self._unitsView.clicked.connect(self._on_unit_clicked)
 300                 self._unitsView.setUniformRowHeights(True)
 301
 302                 self._searchButton = QtGui.QPushButton()
 303                 self._searchEntry = QtGui.QLineEdit()
 304                 self._searchCloseButton = QtGui.QPushButton()
 305
 306                 self._searchLayout = QtGui.QHBoxLayout()
 307                 self._searchLayout.addWidget(self._searchButton)
 308                 self._searchLayout.addWidget(self._searchEntry)
 309                 self._searchLayout.addWidget(self._searchCloseButton)
 310
 311                 self._layout = QtGui.QVBoxLayout()
 312                 self._layout.addLayout(self._selectedUnitLayout)
 313                 self._layout.addWidget(self._unitsView)
 314                 self._layout.addLayout(self._searchLayout)
 315
 316                 centralWidget = QtGui.QWidget()
 317                 centralWidget.setLayout(self._layout)
 318
 319                 self._window = QtGui.QMainWindow(parent)
 320                 if parent is not None:
 321                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 322                 self._window.setWindowTitle("%s - %s" % (constants.__pretty_app_name__, category))
 323                 self._window.setWindowIcon(QtGui.QIcon(appIconPath))
 324                 self._window.setCentralWidget(centralWidget)
 325
 326                 self._select_unit(0)
 327
 328                 self._window.show()
 329                 self._hide_search()
 330
 331         def _hide_search(self):
 332                 self._searchButton.hide()
 333                 self._searchEntry.hide()
 334                 self._searchCloseButton.hide()
 335
 336         @misc_utils.log_exception(_moduleLogger)
 337         def _on_unit_clicked(self, index):
 338                 self._select_unit(index.row())
 339
 340         @misc_utils.log_exception(_moduleLogger)
 341         def _on_value_edited(self, *args):
 342                 userInput = self._selectedUnitValue.text()
 343                 self._unitsModel.update_values(self._selectedIndex, str(userInput))
 344
 345         def _select_unit(self, index):
 346                 unit = self._unitsModel.get_unit(index)
 347                 self._selectedUnitName.setText(unit.name)
 348                 self._selectedUnitValue.setText(str(unit.value))
 349                 self._selectedUnitSymbol.setText(unit.unit)
 350
 351                 self._selectedIndex = index
 352                 qindex = self._unitsModel.createIndex(index, 0, self._unitsModel.get_unit(index))
 353                 self._unitsView.scrollTo(qindex)
 354
 355
 356 def run_gonvert():
 357         app = QtGui.QApplication([])
 358         handle = Gonvert()
 359         return app.exec_()
 360
 361
 362 if __name__ == "__main__":
 363         logging.basicConfig(level = logging.DEBUG)
 364         try:
 365                 os.makedirs(constants._data_path_)
 366         except OSError, e:
 367                 if e.errno != 17:
 368                         raise
 369
 370         val = run_gonvert()
 371         sys.exit(val)