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
  19 _moduleLogger = logging.getLogger("gonvert_glade")
  20
  21
  22 def change_menu_label(widgets, labelname, newtext):
  23         item_label = widgets.get_widget(labelname).get_children()[0]
  24         item_label.set_text(newtext)
  25
  26
  27 def split_number(number):
  28         try:
  29                 fractional, integer = math.modf(number)
  30         except TypeError:
  31                 integerDisplay = number
  32                 fractionalDisplay = ""
  33         else:
  34                 integerDisplay = str(integer)
  35                 fractionalDisplay = str(fractional)
  36                 if "e+" in integerDisplay:
  37                         integerDisplay = number
  38                         fractionalDisplay = ""
  39                 elif "e-" in fractionalDisplay and 0.0 < integer:
  40                         integerDisplay = number
  41                         fractionalDisplay = ""
  42                 elif "e-" in fractionalDisplay:
  43                         integerDisplay = ""
  44                         fractionalDisplay = number
  45                 else:
  46                         integerDisplay = integerDisplay.split(".", 1)[0] + "."
  47                         fractionalDisplay = fractionalDisplay.rsplit(".", 1)[-1]
  48
  49         return integerDisplay, fractionalDisplay
  50
  51
  52 class Gonvert(object):
  53
  54         _DATA_PATHS = [
  55                 os.path.dirname(__file__),
  56                 os.path.join(os.path.dirname(__file__), "../data"),
  57                 os.path.join(os.path.dirname(__file__), "../lib"),
  58                 '/usr/share/gonvert',
  59                 '/usr/lib/gonvert',
  60         ]
  61
  62         def __init__(self):
  63                 self._dataPath = ""
  64                 for dataPath in self._DATA_PATHS:
  65                         appIconPath = os.path.join(dataPath, "pixmaps", "gonvert.png")
  66                         if os.path.isfile(appIconPath):
  67                                 self._dataPath = dataPath
  68                                 break
  69                 else:
  70                         raise RuntimeError("UI Descriptor not found!")
  71                 self._appIconPath = appIconPath
  72
  73                 self._jumpWindow = None
  74                 self._catWindow = None
  75
  76                 self._jumpAction = QtGui.QAction(None)
  77                 self._jumpAction.setText("Quick Jump")
  78                 self._jumpAction.setStatusTip("Search for a unit and jump straight to it")
  79                 self._jumpAction.setToolTip("Search for a unit and jump straight to it")
  80                 self._jumpAction.setShortcut(QtGui.QKeySequence("CTRL+j"))
  81
  82                 self.request_category()
  83
  84         def request_category(self):
  85                 if self._catWindow is not None:
  86                         self._catWindow.close()
  87                         self._catWindow = None
  88                 self._catWindow = CategoryWindow(None, self)
  89                 return self._catWindow
  90
  91         def search_units(self):
  92                 if self._jumpWindow is not None:
  93                         self._jumpWindow.close()
  94                         self._jumpWindow = None
  95                 self._jumpWindow = QuickJump(None, self)
  96                 return self._jumpWindow
  97
  98         @property
  99         def appIconPath(self):
 100                 return self._appIconPath
 101
 102         @property
 103         def jumpAction(self):
 104                 return self._jumpAction
 105
 106
 107 class CategoryWindow(object):
 108
 109         def __init__(self, parent, app):
 110                 self._app = app
 111                 self._unitWindow = None
 112
 113                 self._categories = QtGui.QTreeWidget()
 114                 self._categories.setHeaderLabels(["Categories"])
 115                 self._categories.itemClicked.connect(self._on_category_clicked)
 116                 self._categories.setHeaderHidden(True)
 117                 for catName in unit_data.UNIT_CATEGORIES:
 118                         twi = QtGui.QTreeWidgetItem(self._categories)
 119                         twi.setText(0, catName)
 120
 121                 self._layout = QtGui.QVBoxLayout()
 122                 self._layout.addWidget(self._categories)
 123
 124                 centralWidget = QtGui.QWidget()
 125                 centralWidget.setLayout(self._layout)
 126
 127                 self._window = QtGui.QMainWindow(parent)
 128                 if parent is not None:
 129                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 130                 self._window.setWindowTitle("%s - Categories" % constants.__pretty_app_name__)
 131                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 132                 self._window.setCentralWidget(centralWidget)
 133
 134                 self._app.jumpAction.triggered.connect(self._on_jump_start)
 135                 viewMenu = self._window.menuBar().addMenu("&View")
 136                 viewMenu.addAction(self._app.jumpAction)
 137
 138                 self._window.show()
 139
 140         def close(self):
 141                 self._window.close()
 142
 143         def selectCategory(self, categoryName):
 144                 if self._unitWindow is not None:
 145                         self._unitWindow.close()
 146                         self._unitWindow = None
 147                 self._unitWindow = UnitWindow(self._window, categoryName, self._app)
 148                 return self._unitWindow
 149
 150         @misc_utils.log_exception(_moduleLogger)
 151         def _on_jump_start(self, checked = False):
 152                 self._app.search_units()
 153
 154         @misc_utils.log_exception(_moduleLogger)
 155         def _on_category_clicked(self, item, columnIndex):
 156                 categoryName = unicode(item.text(0))
 157                 self.selectCategory(categoryName)
 158
 159
 160 class QuickJump(object):
 161
 162         MINIMAL_ENTRY = 3
 163
 164         def __init__(self, parent, app):
 165                 self._app = app
 166
 167                 self._searchLabel = QtGui.QLabel("Search:")
 168                 self._searchEntry = QtGui.QLineEdit("")
 169                 self._searchEntry.textEdited.connect(self._on_search_edited)
 170
 171                 self._entryLayout = QtGui.QHBoxLayout()
 172                 self._entryLayout.addWidget(self._searchLabel)
 173                 self._entryLayout.addWidget(self._searchEntry)
 174
 175                 self._resultsBox = QtGui.QTreeWidget()
 176                 self._resultsBox.setHeaderLabels(["Categories", "Units"])
 177                 self._resultsBox.setHeaderHidden(True)
 178                 self._resultsBox.itemClicked.connect(self._on_result_clicked)
 179
 180                 self._layout = QtGui.QVBoxLayout()
 181                 self._layout.addLayout(self._entryLayout)
 182                 self._layout.addWidget(self._resultsBox)
 183
 184                 centralWidget = QtGui.QWidget()
 185                 centralWidget.setLayout(self._layout)
 186
 187                 self._window = QtGui.QMainWindow(parent)
 188                 if parent is not None:
 189                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 190                 self._window.setWindowTitle("%s - Quick Jump" % constants.__pretty_app_name__)
 191                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 192                 self._window.setCentralWidget(centralWidget)
 193
 194                 self._window.show()
 195
 196         def close(self):
 197                 self._window.close()
 198
 199         @misc_utils.log_exception(_moduleLogger)
 200         def _on_result_clicked(self, item, columnIndex):
 201                 categoryName = unicode(item.text(0))
 202                 unitName = unicode(item.text(1))
 203                 catWindow = self._app.request_category()
 204                 unitsWindow = catWindow.selectCategory(categoryName)
 205                 unitsWindow.select_unit(unitName)
 206
 207         @misc_utils.log_exception(_moduleLogger)
 208         def _on_search_edited(self, *args):
 209                 userInput = self._searchEntry.text()
 210                 if len(userInput) <  self.MINIMAL_ENTRY:
 211                         return
 212
 213                 lowerInput = str(userInput).lower()
 214                 for catIndex, category in enumerate(unit_data.UNIT_CATEGORIES):
 215                         units = unit_data.get_units(category)
 216                         for unitIndex, unit in enumerate(units):
 217                                 loweredUnit = unit.lower()
 218                                 if lowerInput in loweredUnit:
 219                                         twi = QtGui.QTreeWidgetItem(self._resultsBox)
 220                                         twi.setText(0, category)
 221                                         twi.setText(1, unit)
 222
 223
 224 class UnitData(object):
 225
 226         HEADERS = ["Name", "Value", "", "Unit"]
 227         ALIGNMENT = [QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignLeft, QtCore.Qt.AlignLeft]
 228
 229         def __init__(self, name, unit, description, conversion):
 230                 self._name = name
 231                 self._unit = unit
 232                 self._description = description
 233                 self._conversion = conversion
 234
 235                 self._value = 0.0
 236                 self._integerDisplay, self._fractionalDisplay = split_number(self._value)
 237
 238         @property
 239         def name(self):
 240                 return self._name
 241
 242         @property
 243         def value(self):
 244                 return self._value
 245
 246         def update_value(self, newValue):
 247                 self._value = newValue
 248                 self._integerDisplay, self._fractionalDisplay = split_number(newValue)
 249
 250         @property
 251         def unit(self):
 252                 return self._unit
 253
 254         @property
 255         def conversion(self):
 256                 return self._conversion
 257
 258         def data(self, column):
 259                 try:
 260                         return [self._name, self._integerDisplay, self._fractionalDisplay, self._unit][column]
 261                 except IndexError:
 262                         return None
 263
 264
 265 class UnitModel(QtCore.QAbstractItemModel):
 266
 267         def __init__(self, categoryName, parent=None):
 268                 super(UnitModel, self).__init__(parent)
 269                 self._categoryName = categoryName
 270                 self._unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
 271
 272                 self._children = []
 273                 for key in unit_data.get_units(self._categoryName):
 274                         conversion, unit, description = self._unitData[key]
 275                         self._children.append(UnitData(key, unit, description, conversion))
 276
 277         @misc_utils.log_exception(_moduleLogger)
 278         def columnCount(self, parent):
 279                 if parent.isValid():
 280                         return 0
 281                 else:
 282                         return len(UnitData.HEADERS)
 283
 284         @misc_utils.log_exception(_moduleLogger)
 285         def data(self, index, role):
 286                 if not index.isValid():
 287                         return None
 288                 elif role == QtCore.Qt.TextAlignmentRole:
 289                         return UnitData.ALIGNMENT[index.column()]
 290                 elif role != QtCore.Qt.DisplayRole:
 291                         return None
 292
 293                 item = index.internalPointer()
 294                 if isinstance(item, UnitData):
 295                         return item.data(index.column())
 296                 elif item is UnitData.HEADERS:
 297                         return item[index.column()]
 298
 299         @misc_utils.log_exception(_moduleLogger)
 300         def sort(self, column, order = QtCore.Qt.AscendingOrder):
 301                 isReverse = order == QtCore.Qt.AscendingOrder
 302                 if column == 0:
 303                         key_func = lambda item: item.name
 304                 elif column in [1, 2]:
 305                         key_func = lambda item: item.value
 306                 elif column == 3:
 307                         key_func = lambda item: item.unit
 308                 self._children.sort(key=key_func, reverse = isReverse)
 309
 310                 self._all_changed()
 311
 312         @misc_utils.log_exception(_moduleLogger)
 313         def flags(self, index):
 314                 if not index.isValid():
 315                         return QtCore.Qt.NoItemFlags
 316
 317                 return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
 318
 319         @misc_utils.log_exception(_moduleLogger)
 320         def headerData(self, section, orientation, role):
 321                 if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
 322                         return UnitData.HEADERS[section]
 323
 324                 return None
 325
 326         @misc_utils.log_exception(_moduleLogger)
 327         def index(self, row, column, parent):
 328                 if not self.hasIndex(row, column, parent):
 329                         return QtCore.QModelIndex()
 330
 331                 if parent.isValid():
 332                         return QtCore.QModelIndex()
 333
 334                 parentItem = UnitData.HEADERS
 335                 childItem = self._children[row]
 336                 if childItem:
 337                         return self.createIndex(row, column, childItem)
 338                 else:
 339                         return QtCore.QModelIndex()
 340
 341         @misc_utils.log_exception(_moduleLogger)
 342         def parent(self, index):
 343                 if not index.isValid():
 344                         return QtCore.QModelIndex()
 345
 346                 childItem = index.internalPointer()
 347                 if isinstance(childItem, UnitData):
 348                         return QtCore.QModelIndex()
 349                 elif childItem is UnitData.HEADERS:
 350                         return None
 351
 352         @misc_utils.log_exception(_moduleLogger)
 353         def rowCount(self, parent):
 354                 if 0 < parent.column():
 355                         return 0
 356
 357                 if not parent.isValid():
 358                         return len(self._children)
 359                 else:
 360                         return len(self._children)
 361
 362         def get_unit(self, index):
 363                 return self._children[index]
 364
 365         def index_unit(self, unitName):
 366                 for i, child in enumerate(self._children):
 367                         if child.name == unitName:
 368                                 return i
 369                 else:
 370                         raise RuntimeError("Unit not found")
 371
 372         def update_values(self, fromIndex, userInput):
 373                 value = self._sanitize_value(userInput)
 374                 func, arg = self._children[fromIndex].conversion
 375                 base = func.to_base(value, arg)
 376                 for i, child in enumerate(self._children):
 377                         if i == fromIndex:
 378                                 continue
 379                         func, arg = child.conversion
 380                         newValue = func.from_base(base, arg)
 381                         child.update_value(newValue)
 382
 383                 self._all_changed()
 384
 385         def _all_changed(self):
 386                 topLeft = self.createIndex(0, 1, self._children[0])
 387                 bottomRight = self.createIndex(len(self._children)-1, 2, self._children[-1])
 388                 self.dataChanged.emit(topLeft, bottomRight)
 389
 390         def _sanitize_value(self, userEntry):
 391                 if self._categoryName == "Computer Numbers":
 392                         if userEntry == '':
 393                                 value = '0'
 394                         else:
 395                                 value = userEntry
 396                 else:
 397                         if userEntry == '':
 398                                 value = 0.0
 399                         else:
 400                                 value = float(userEntry)
 401                 return value
 402
 403
 404 class UnitWindow(object):
 405
 406         def __init__(self, parent, category, app):
 407                 self._app = app
 408                 self._categoryName = category
 409                 self._selectedIndex = 0
 410
 411                 self._selectedUnitName = QtGui.QLabel()
 412                 self._selectedUnitValue = QtGui.QLineEdit()
 413                 self._selectedUnitValue.textEdited.connect(self._on_value_edited)
 414                 self._selectedUnitSymbol = QtGui.QLabel()
 415
 416                 self._selectedUnitLayout = QtGui.QHBoxLayout()
 417                 self._selectedUnitLayout.addWidget(self._selectedUnitName)
 418                 self._selectedUnitLayout.addWidget(self._selectedUnitValue)
 419                 self._selectedUnitLayout.addWidget(self._selectedUnitSymbol)
 420
 421                 self._unitsModel = UnitModel(self._categoryName)
 422                 self._unitsView = QtGui.QTreeView()
 423                 self._unitsView.setModel(self._unitsModel)
 424                 self._unitsView.clicked.connect(self._on_unit_clicked)
 425                 self._unitsView.setUniformRowHeights(True)
 426                 self._unitsView.header().setSortIndicatorShown(True)
 427                 self._unitsView.header().setClickable(True)
 428                 self._unitsView.setSortingEnabled(True)
 429                 if True:
 430                         self._unitsView.setHeaderHidden(True)
 431
 432                 self._layout = QtGui.QVBoxLayout()
 433                 self._layout.addLayout(self._selectedUnitLayout)
 434                 self._layout.addWidget(self._unitsView)
 435
 436                 centralWidget = QtGui.QWidget()
 437                 centralWidget.setLayout(self._layout)
 438
 439                 self._window = QtGui.QMainWindow(parent)
 440                 if parent is not None:
 441                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 442                 self._window.setWindowTitle("%s - %s" % (constants.__pretty_app_name__, category))
 443                 self._window.setWindowIcon(QtGui.QIcon(app.appIconPath))
 444                 self._window.setCentralWidget(centralWidget)
 445
 446                 self._select_unit(0)
 447
 448                 self._app.jumpAction.triggered.connect(self._on_jump_start)
 449                 viewMenu = self._window.menuBar().addMenu("&View")
 450                 viewMenu.addAction(self._app.jumpAction)
 451
 452                 self._window.show()
 453
 454         def close(self):
 455                 self._window.close()
 456
 457         def select_unit(self, unitName):
 458                 index = self._unitsModel.index_unit(unitName)
 459                 self._select_unit(index)
 460
 461         @misc_utils.log_exception(_moduleLogger)
 462         def _on_jump_start(self, checked = False):
 463                 self._app.search_units()
 464
 465         @misc_utils.log_exception(_moduleLogger)
 466         def _on_unit_clicked(self, index):
 467                 self._select_unit(index.row())
 468
 469         @misc_utils.log_exception(_moduleLogger)
 470         def _on_value_edited(self, *args):
 471                 userInput = self._selectedUnitValue.text()
 472                 self._unitsModel.update_values(self._selectedIndex, str(userInput))
 473
 474         def _select_unit(self, index):
 475                 unit = self._unitsModel.get_unit(index)
 476                 self._selectedUnitName.setText(unit.name)
 477                 self._selectedUnitValue.setText(str(unit.value))
 478                 self._selectedUnitSymbol.setText(unit.unit)
 479
 480                 self._selectedIndex = index
 481                 qindex = self._unitsModel.createIndex(index, 0, self._unitsModel.get_unit(index))
 482                 self._unitsView.scrollTo(qindex)
 483
 484
 485 def run_gonvert():
 486         app = QtGui.QApplication([])
 487         handle = Gonvert()
 488         return app.exec_()
 489
 490
 491 if __name__ == "__main__":
 492         logging.basicConfig(level = logging.DEBUG)
 493         try:
 494                 os.makedirs(constants._data_path_)
 495         except OSError, e:
 496                 if e.errno != 17:
 497                         raise
 498
 499         val = run_gonvert()
 500         sys.exit(val)