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                 self._categories.setHeaderHidden(True)
  97                 for catName in unit_data.UNIT_CATEGORIES:
  98                         twi = QtGui.QTreeWidgetItem(self._categories)
  99                         twi.setText(0, catName)
 100
 101                 self._layout = QtGui.QVBoxLayout()
 102                 self._layout.addWidget(self._categories)
 103
 104                 centralWidget = QtGui.QWidget()
 105                 centralWidget.setLayout(self._layout)
 106
 107                 self._window = QtGui.QMainWindow(parent)
 108                 if parent is not None:
 109                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 110                 self._window.setWindowTitle("%s - Categories" % constants.__pretty_app_name__)
 111                 self._window.setWindowIcon(QtGui.QIcon(appIconPath))
 112                 self._window.setCentralWidget(centralWidget)
 113
 114                 self._window.show()
 115
 116         @misc_utils.log_exception(_moduleLogger)
 117         def _on_category_clicked(self, item, columnIndex):
 118                 categoryName = unicode(item.text(0))
 119                 unitWindow = UnitWindow(self._window, categoryName, self._appIconPath)
 120                 self._unitWindows = [unitWindow]
 121
 122
 123 class UnitData(object):
 124
 125         HEADERS = ["Name", "Value", "", "Unit"]
 126         ALIGNMENT = [QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignLeft, QtCore.Qt.AlignLeft]
 127
 128         def __init__(self, name, unit, description, conversion):
 129                 self._name = name
 130                 self._unit = unit
 131                 self._description = description
 132                 self._conversion = conversion
 133
 134                 self._value = 0.0
 135                 self._integerDisplay, self._fractionalDisplay = split_number(self._value)
 136
 137         @property
 138         def name(self):
 139                 return self._name
 140
 141         @property
 142         def value(self):
 143                 return self._value
 144
 145         def update_value(self, newValue):
 146                 self._value = newValue
 147                 self._integerDisplay, self._fractionalDisplay = split_number(newValue)
 148
 149         @property
 150         def unit(self):
 151                 return self._unit
 152
 153         @property
 154         def conversion(self):
 155                 return self._conversion
 156
 157         def data(self, column):
 158                 try:
 159                         return [self._name, self._integerDisplay, self._fractionalDisplay, self._unit][column]
 160                 except IndexError:
 161                         return None
 162
 163
 164 class UnitModel(QtCore.QAbstractItemModel):
 165
 166         def __init__(self, categoryName, parent=None):
 167                 super(UnitModel, self).__init__(parent)
 168                 self._categoryName = categoryName
 169                 self._unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
 170
 171                 self._children = []
 172                 for key in unit_data.get_units(self._categoryName):
 173                         conversion, unit, description = self._unitData[key]
 174                         self._children.append(UnitData(key, unit, description, conversion))
 175
 176         @misc_utils.log_exception(_moduleLogger)
 177         def columnCount(self, parent):
 178                 if parent.isValid():
 179                         return 0
 180                 else:
 181                         return len(UnitData.HEADERS)
 182
 183         @misc_utils.log_exception(_moduleLogger)
 184         def data(self, index, role):
 185                 if not index.isValid():
 186                         return None
 187                 elif role == QtCore.Qt.TextAlignmentRole:
 188                         return UnitData.ALIGNMENT[index.column()]
 189                 elif role != QtCore.Qt.DisplayRole:
 190                         return None
 191
 192                 item = index.internalPointer()
 193                 if isinstance(item, UnitData):
 194                         return item.data(index.column())
 195                 elif item is UnitData.HEADERS:
 196                         return item[index.column()]
 197
 198         @misc_utils.log_exception(_moduleLogger)
 199         def sort(self, column, order = QtCore.Qt.AscendingOrder):
 200                 isReverse = order == QtCore.Qt.AscendingOrder
 201                 if column == 0:
 202                         key_func = lambda item: item.name
 203                 elif column in [1, 2]:
 204                         key_func = lambda item: item.value
 205                 elif column == 3:
 206                         key_func = lambda item: item.unit
 207                 self._children.sort(key=key_func, reverse = isReverse)
 208
 209                 self._all_changed()
 210
 211         @misc_utils.log_exception(_moduleLogger)
 212         def flags(self, index):
 213                 if not index.isValid():
 214                         return QtCore.Qt.NoItemFlags
 215
 216                 return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
 217
 218         @misc_utils.log_exception(_moduleLogger)
 219         def headerData(self, section, orientation, role):
 220                 if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
 221                         return UnitData.HEADERS[section]
 222
 223                 return None
 224
 225         @misc_utils.log_exception(_moduleLogger)
 226         def index(self, row, column, parent):
 227                 if not self.hasIndex(row, column, parent):
 228                         return QtCore.QModelIndex()
 229
 230                 if parent.isValid():
 231                         return QtCore.QModelIndex()
 232
 233                 parentItem = UnitData.HEADERS
 234                 childItem = self._children[row]
 235                 if childItem:
 236                         return self.createIndex(row, column, childItem)
 237                 else:
 238                         return QtCore.QModelIndex()
 239
 240         @misc_utils.log_exception(_moduleLogger)
 241         def parent(self, index):
 242                 if not index.isValid():
 243                         return QtCore.QModelIndex()
 244
 245                 childItem = index.internalPointer()
 246                 if isinstance(childItem, UnitData):
 247                         return QtCore.QModelIndex()
 248                 elif childItem is UnitData.HEADERS:
 249                         return None
 250
 251         @misc_utils.log_exception(_moduleLogger)
 252         def rowCount(self, parent):
 253                 if 0 < parent.column():
 254                         return 0
 255
 256                 if not parent.isValid():
 257                         return len(self._children)
 258                 else:
 259                         return len(self._children)
 260
 261         def get_unit(self, index):
 262                 return self._children[index]
 263
 264         def update_values(self, fromIndex, userInput):
 265                 value = self._sanitize_value(userInput)
 266                 func, arg = self._children[fromIndex].conversion
 267                 base = func.to_base(value, arg)
 268                 for i, child in enumerate(self._children):
 269                         if i == fromIndex:
 270                                 continue
 271                         func, arg = child.conversion
 272                         newValue = func.from_base(base, arg)
 273                         child.update_value(newValue)
 274
 275                 self._all_changed()
 276
 277         def _all_changed(self):
 278                 topLeft = self.createIndex(0, 1, self._children[0])
 279                 bottomRight = self.createIndex(len(self._children)-1, 2, self._children[-1])
 280                 self.dataChanged.emit(topLeft, bottomRight)
 281
 282         def _sanitize_value(self, userEntry):
 283                 if self._categoryName == "Computer Numbers":
 284                         if userEntry == '':
 285                                 value = '0'
 286                         else:
 287                                 value = userEntry
 288                 else:
 289                         if userEntry == '':
 290                                 value = 0.0
 291                         else:
 292                                 value = float(userEntry)
 293                 return value
 294
 295
 296 class UnitWindow(object):
 297
 298         def __init__(self, parent, category, appIconPath):
 299                 self._categoryName = category
 300                 self._selectedIndex = 0
 301
 302                 self._selectedUnitName = QtGui.QLabel()
 303                 self._selectedUnitValue = QtGui.QLineEdit()
 304                 self._selectedUnitValue.textEdited.connect(self._on_value_edited)
 305                 self._selectedUnitValue.editingFinished.connect(self._on_value_edited)
 306                 self._selectedUnitSymbol = QtGui.QLabel()
 307
 308                 self._selectedUnitLayout = QtGui.QHBoxLayout()
 309                 self._selectedUnitLayout.addWidget(self._selectedUnitName)
 310                 self._selectedUnitLayout.addWidget(self._selectedUnitValue)
 311                 self._selectedUnitLayout.addWidget(self._selectedUnitSymbol)
 312
 313                 self._unitsModel = UnitModel(self._categoryName)
 314                 self._unitsView = QtGui.QTreeView()
 315                 self._unitsView.setModel(self._unitsModel)
 316                 self._unitsView.clicked.connect(self._on_unit_clicked)
 317                 self._unitsView.setUniformRowHeights(True)
 318                 self._unitsView.header().setSortIndicatorShown(True)
 319                 self._unitsView.header().setClickable(True)
 320                 self._unitsView.setSortingEnabled(True)
 321                 if True:
 322                         self._unitsView.setHeaderHidden(True)
 323
 324                 self._searchButton = QtGui.QPushButton()
 325                 self._searchEntry = QtGui.QLineEdit()
 326                 self._searchCloseButton = QtGui.QPushButton()
 327
 328                 self._searchLayout = QtGui.QHBoxLayout()
 329                 self._searchLayout.addWidget(self._searchButton)
 330                 self._searchLayout.addWidget(self._searchEntry)
 331                 self._searchLayout.addWidget(self._searchCloseButton)
 332
 333                 self._layout = QtGui.QVBoxLayout()
 334                 self._layout.addLayout(self._selectedUnitLayout)
 335                 self._layout.addWidget(self._unitsView)
 336                 self._layout.addLayout(self._searchLayout)
 337
 338                 centralWidget = QtGui.QWidget()
 339                 centralWidget.setLayout(self._layout)
 340
 341                 self._window = QtGui.QMainWindow(parent)
 342                 if parent is not None:
 343                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 344                 self._window.setWindowTitle("%s - %s" % (constants.__pretty_app_name__, category))
 345                 self._window.setWindowIcon(QtGui.QIcon(appIconPath))
 346                 self._window.setCentralWidget(centralWidget)
 347
 348                 self._select_unit(0)
 349
 350                 self._window.show()
 351                 self._hide_search()
 352
 353         def _hide_search(self):
 354                 self._searchButton.hide()
 355                 self._searchEntry.hide()
 356                 self._searchCloseButton.hide()
 357
 358         @misc_utils.log_exception(_moduleLogger)
 359         def _on_unit_clicked(self, index):
 360                 self._select_unit(index.row())
 361
 362         @misc_utils.log_exception(_moduleLogger)
 363         def _on_value_edited(self, *args):
 364                 userInput = self._selectedUnitValue.text()
 365                 self._unitsModel.update_values(self._selectedIndex, str(userInput))
 366
 367         def _select_unit(self, index):
 368                 unit = self._unitsModel.get_unit(index)
 369                 self._selectedUnitName.setText(unit.name)
 370                 self._selectedUnitValue.setText(str(unit.value))
 371                 self._selectedUnitSymbol.setText(unit.unit)
 372
 373                 self._selectedIndex = index
 374                 qindex = self._unitsModel.createIndex(index, 0, self._unitsModel.get_unit(index))
 375                 self._unitsView.scrollTo(qindex)
 376
 377
 378 def run_gonvert():
 379         app = QtGui.QApplication([])
 380         handle = Gonvert()
 381         return app.exec_()
 382
 383
 384 if __name__ == "__main__":
 385         logging.basicConfig(level = logging.DEBUG)
 386         try:
 387                 os.makedirs(constants._data_path_)
 388         except OSError, e:
 389                 if e.errno != 17:
 390                         raise
 391
 392         val = run_gonvert()
 393         sys.exit(val)