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                 viewMenu = self._window.menuBar().addMenu("&View")
 135                 viewMenu.addAction(self._app.jumpAction)
 136
 137                 self._app.jumpAction.triggered.connect(self._on_jump_start)
 138
 139                 self._window.show()
 140
 141         def close(self):
 142                 self._window.close()
 143
 144         def selectCategory(self, categoryName):
 145                 if self._unitWindow is not None:
 146                         self._unitWindow.close()
 147                         self._unitWindow = None
 148                 self._unitWindow = UnitWindow(self._window, categoryName, self._app)
 149                 return self._unitWindow
 150
 151         @misc_utils.log_exception(_moduleLogger)
 152         def _on_jump_start(self, checked = False):
 153                 self._app.search_units()
 154
 155         @misc_utils.log_exception(_moduleLogger)
 156         def _on_category_clicked(self, item, columnIndex):
 157                 categoryName = unicode(item.text(0))
 158                 self.selectCategory(categoryName)
 159
 160
 161 class QuickJump(object):
 162
 163         MINIMAL_ENTRY = 3
 164
 165         def __init__(self, parent, app):
 166                 self._app = app
 167
 168                 self._searchLabel = QtGui.QLabel("Search:")
 169                 self._searchEntry = QtGui.QLineEdit("")
 170                 self._searchEntry.textEdited.connect(self._on_search_edited)
 171
 172                 self._entryLayout = QtGui.QHBoxLayout()
 173                 self._entryLayout.addWidget(self._searchLabel)
 174                 self._entryLayout.addWidget(self._searchEntry)
 175
 176                 self._resultsBox = QtGui.QTreeWidget()
 177                 self._resultsBox.setHeaderLabels(["Categories", "Units"])
 178                 self._resultsBox.setHeaderHidden(True)
 179                 self._resultsBox.itemClicked.connect(self._on_result_clicked)
 180
 181                 self._layout = QtGui.QVBoxLayout()
 182                 self._layout.addLayout(self._entryLayout)
 183                 self._layout.addWidget(self._resultsBox)
 184
 185                 centralWidget = QtGui.QWidget()
 186                 centralWidget.setLayout(self._layout)
 187
 188                 self._window = QtGui.QMainWindow(parent)
 189                 if parent is not None:
 190                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 191                 self._window.setWindowTitle("%s - Quick Jump" % constants.__pretty_app_name__)
 192                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 193                 self._window.setCentralWidget(centralWidget)
 194
 195                 self._window.show()
 196
 197         def close(self):
 198                 self._window.close()
 199
 200         @misc_utils.log_exception(_moduleLogger)
 201         def _on_result_clicked(self, item, columnIndex):
 202                 categoryName = unicode(item.text(0))
 203                 unitName = unicode(item.text(1))
 204                 catWindow = self._app.request_category()
 205                 unitsWindow = catWindow.selectCategory(categoryName)
 206                 unitsWindow.select_unit(unitName)
 207
 208         @misc_utils.log_exception(_moduleLogger)
 209         def _on_search_edited(self, *args):
 210                 userInput = self._searchEntry.text()
 211                 if len(userInput) <  self.MINIMAL_ENTRY:
 212                         return
 213
 214                 lowerInput = str(userInput).lower()
 215                 for catIndex, category in enumerate(unit_data.UNIT_CATEGORIES):
 216                         units = unit_data.get_units(category)
 217                         for unitIndex, unit in enumerate(units):
 218                                 loweredUnit = unit.lower()
 219                                 if lowerInput in loweredUnit:
 220                                         twi = QtGui.QTreeWidgetItem(self._resultsBox)
 221                                         twi.setText(0, category)
 222                                         twi.setText(1, unit)
 223
 224
 225 class UnitData(object):
 226
 227         HEADERS = ["Name", "Value", "", "Unit"]
 228         ALIGNMENT = [QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignLeft, QtCore.Qt.AlignLeft]
 229
 230         def __init__(self, name, unit, description, conversion):
 231                 self._name = name
 232                 self._unit = unit
 233                 self._description = description
 234                 self._conversion = conversion
 235
 236                 self._value = 0.0
 237                 self._integerDisplay, self._fractionalDisplay = split_number(self._value)
 238
 239         @property
 240         def name(self):
 241                 return self._name
 242
 243         @property
 244         def value(self):
 245                 return self._value
 246
 247         def update_value(self, newValue):
 248                 self._value = newValue
 249                 self._integerDisplay, self._fractionalDisplay = split_number(newValue)
 250
 251         @property
 252         def unit(self):
 253                 return self._unit
 254
 255         @property
 256         def conversion(self):
 257                 return self._conversion
 258
 259         def data(self, column):
 260                 try:
 261                         return [self._name, self._integerDisplay, self._fractionalDisplay, self._unit][column]
 262                 except IndexError:
 263                         return None
 264
 265
 266 class UnitModel(QtCore.QAbstractItemModel):
 267
 268         def __init__(self, categoryName, parent=None):
 269                 super(UnitModel, self).__init__(parent)
 270                 self._categoryName = categoryName
 271                 self._unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
 272
 273                 self._children = []
 274                 for key in unit_data.get_units(self._categoryName):
 275                         conversion, unit, description = self._unitData[key]
 276                         self._children.append(UnitData(key, unit, description, conversion))
 277
 278         @misc_utils.log_exception(_moduleLogger)
 279         def columnCount(self, parent):
 280                 if parent.isValid():
 281                         return 0
 282                 else:
 283                         return len(UnitData.HEADERS)
 284
 285         @misc_utils.log_exception(_moduleLogger)
 286         def data(self, index, role):
 287                 if not index.isValid():
 288                         return None
 289                 elif role == QtCore.Qt.TextAlignmentRole:
 290                         return UnitData.ALIGNMENT[index.column()]
 291                 elif role != QtCore.Qt.DisplayRole:
 292                         return None
 293
 294                 item = index.internalPointer()
 295                 if isinstance(item, UnitData):
 296                         return item.data(index.column())
 297                 elif item is UnitData.HEADERS:
 298                         return item[index.column()]
 299
 300         @misc_utils.log_exception(_moduleLogger)
 301         def sort(self, column, order = QtCore.Qt.AscendingOrder):
 302                 isReverse = order == QtCore.Qt.AscendingOrder
 303                 if column == 0:
 304                         key_func = lambda item: item.name
 305                 elif column in [1, 2]:
 306                         key_func = lambda item: item.value
 307                 elif column == 3:
 308                         key_func = lambda item: item.unit
 309                 self._children.sort(key=key_func, reverse = isReverse)
 310
 311                 self._all_changed()
 312
 313         @misc_utils.log_exception(_moduleLogger)
 314         def flags(self, index):
 315                 if not index.isValid():
 316                         return QtCore.Qt.NoItemFlags
 317
 318                 return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
 319
 320         @misc_utils.log_exception(_moduleLogger)
 321         def headerData(self, section, orientation, role):
 322                 if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
 323                         return UnitData.HEADERS[section]
 324
 325                 return None
 326
 327         @misc_utils.log_exception(_moduleLogger)
 328         def index(self, row, column, parent):
 329                 if not self.hasIndex(row, column, parent):
 330                         return QtCore.QModelIndex()
 331
 332                 if parent.isValid():
 333                         return QtCore.QModelIndex()
 334
 335                 parentItem = UnitData.HEADERS
 336                 childItem = self._children[row]
 337                 if childItem:
 338                         return self.createIndex(row, column, childItem)
 339                 else:
 340                         return QtCore.QModelIndex()
 341
 342         @misc_utils.log_exception(_moduleLogger)
 343         def parent(self, index):
 344                 if not index.isValid():
 345                         return QtCore.QModelIndex()
 346
 347                 childItem = index.internalPointer()
 348                 if isinstance(childItem, UnitData):
 349                         return QtCore.QModelIndex()
 350                 elif childItem is UnitData.HEADERS:
 351                         return None
 352
 353         @misc_utils.log_exception(_moduleLogger)
 354         def rowCount(self, parent):
 355                 if 0 < parent.column():
 356                         return 0
 357
 358                 if not parent.isValid():
 359                         return len(self._children)
 360                 else:
 361                         return len(self._children)
 362
 363         def get_unit(self, index):
 364                 return self._children[index]
 365
 366         def index_unit(self, unitName):
 367                 for i, child in enumerate(self._children):
 368                         if child.name == unitName:
 369                                 return i
 370                 else:
 371                         raise RuntimeError("Unit not found")
 372
 373         def update_values(self, fromIndex, userInput):
 374                 value = self._sanitize_value(userInput)
 375                 func, arg = self._children[fromIndex].conversion
 376                 base = func.to_base(value, arg)
 377                 for i, child in enumerate(self._children):
 378                         if i == fromIndex:
 379                                 continue
 380                         func, arg = child.conversion
 381                         newValue = func.from_base(base, arg)
 382                         child.update_value(newValue)
 383
 384                 self._all_changed()
 385
 386         def _all_changed(self):
 387                 topLeft = self.createIndex(0, 1, self._children[0])
 388                 bottomRight = self.createIndex(len(self._children)-1, 2, self._children[-1])
 389                 self.dataChanged.emit(topLeft, bottomRight)
 390
 391         def _sanitize_value(self, userEntry):
 392                 if self._categoryName == "Computer Numbers":
 393                         if userEntry == '':
 394                                 value = '0'
 395                         else:
 396                                 value = userEntry
 397                 else:
 398                         if userEntry == '':
 399                                 value = 0.0
 400                         else:
 401                                 value = float(userEntry)
 402                 return value
 403
 404
 405 class UnitWindow(object):
 406
 407         def __init__(self, parent, category, app):
 408                 self._app = app
 409                 self._categoryName = category
 410                 self._selectedIndex = 0
 411
 412                 self._selectedUnitName = QtGui.QLabel()
 413                 self._selectedUnitValue = QtGui.QLineEdit()
 414                 self._selectedUnitValue.textEdited.connect(self._on_value_edited)
 415                 self._selectedUnitSymbol = QtGui.QLabel()
 416
 417                 self._selectedUnitLayout = QtGui.QHBoxLayout()
 418                 self._selectedUnitLayout.addWidget(self._selectedUnitName)
 419                 self._selectedUnitLayout.addWidget(self._selectedUnitValue)
 420                 self._selectedUnitLayout.addWidget(self._selectedUnitSymbol)
 421
 422                 self._unitsModel = UnitModel(self._categoryName)
 423                 self._unitsView = QtGui.QTreeView()
 424                 self._unitsView.setModel(self._unitsModel)
 425                 self._unitsView.clicked.connect(self._on_unit_clicked)
 426                 self._unitsView.setUniformRowHeights(True)
 427                 self._unitsView.header().setSortIndicatorShown(True)
 428                 self._unitsView.header().setClickable(True)
 429                 self._unitsView.setSortingEnabled(True)
 430                 if True:
 431                         self._unitsView.setHeaderHidden(True)
 432
 433                 self._layout = QtGui.QVBoxLayout()
 434                 self._layout.addLayout(self._selectedUnitLayout)
 435                 self._layout.addWidget(self._unitsView)
 436
 437                 centralWidget = QtGui.QWidget()
 438                 centralWidget.setLayout(self._layout)
 439
 440                 self._window = QtGui.QMainWindow(parent)
 441                 if parent is not None:
 442                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 443                 self._window.setWindowTitle("%s - %s" % (constants.__pretty_app_name__, category))
 444                 self._window.setWindowIcon(QtGui.QIcon(app.appIconPath))
 445                 self._window.setCentralWidget(centralWidget)
 446
 447                 self._select_unit(0)
 448
 449                 self._sortActionGroup = QtGui.QActionGroup(None)
 450                 self._sortByNameAction = QtGui.QAction(self._sortActionGroup)
 451                 self._sortByNameAction.setText("Sort By Name")
 452                 self._sortByNameAction.setStatusTip("Sort the units by name")
 453                 self._sortByNameAction.setToolTip("Sort the units by name")
 454                 self._sortByValueAction = QtGui.QAction(self._sortActionGroup)
 455                 self._sortByValueAction.setText("Sort By Value")
 456                 self._sortByValueAction.setStatusTip("Sort the units by value")
 457                 self._sortByValueAction.setToolTip("Sort the units by value")
 458                 self._sortByUnitAction = QtGui.QAction(self._sortActionGroup)
 459                 self._sortByUnitAction.setText("Sort By Unit")
 460                 self._sortByUnitAction.setStatusTip("Sort the units by unit")
 461                 self._sortByUnitAction.setToolTip("Sort the units by unit")
 462
 463                 viewMenu = self._window.menuBar().addMenu("&View")
 464                 viewMenu.addAction(self._app.jumpAction)
 465                 viewMenu.addSeparator()
 466                 viewMenu.addAction(self._sortByNameAction)
 467                 viewMenu.addAction(self._sortByValueAction)
 468                 viewMenu.addAction(self._sortByUnitAction)
 469
 470                 self._app.jumpAction.triggered.connect(self._on_jump_start)
 471                 self._sortByNameAction.triggered.connect(self._on_sort_by_name)
 472                 self._sortByValueAction.triggered.connect(self._on_sort_by_value)
 473                 self._sortByUnitAction.triggered.connect(self._on_sort_by_unit)
 474
 475                 self._window.show()
 476
 477         def close(self):
 478                 self._window.close()
 479
 480         def select_unit(self, unitName):
 481                 index = self._unitsModel.index_unit(unitName)
 482                 self._select_unit(index)
 483
 484         @misc_utils.log_exception(_moduleLogger)
 485         def _on_sort_by_name(self, checked = False):
 486                 self._unitsModel.sort(0, QtCore.Qt.DescendingOrder)
 487
 488         @misc_utils.log_exception(_moduleLogger)
 489         def _on_sort_by_value(self, checked = False):
 490                 self._unitsModel.sort(1)
 491
 492         @misc_utils.log_exception(_moduleLogger)
 493         def _on_sort_by_unit(self, checked = False):
 494                 self._unitsModel.sort(3, QtCore.Qt.DescendingOrder)
 495
 496         @misc_utils.log_exception(_moduleLogger)
 497         def _on_jump_start(self, checked = False):
 498                 self._app.search_units()
 499
 500         @misc_utils.log_exception(_moduleLogger)
 501         def _on_unit_clicked(self, index):
 502                 self._select_unit(index.row())
 503
 504         @misc_utils.log_exception(_moduleLogger)
 505         def _on_value_edited(self, *args):
 506                 userInput = self._selectedUnitValue.text()
 507                 self._unitsModel.update_values(self._selectedIndex, str(userInput))
 508
 509         def _select_unit(self, index):
 510                 unit = self._unitsModel.get_unit(index)
 511                 self._selectedUnitName.setText(unit.name)
 512                 self._selectedUnitValue.setText(str(unit.value))
 513                 self._selectedUnitSymbol.setText(unit.unit)
 514
 515                 self._selectedIndex = index
 516                 qindex = self._unitsModel.createIndex(index, 0, self._unitsModel.get_unit(index))
 517                 self._unitsView.scrollTo(qindex)
 518
 519
 520 def run_gonvert():
 521         app = QtGui.QApplication([])
 522         handle = Gonvert()
 523         return app.exec_()
 524
 525
 526 if __name__ == "__main__":
 527         logging.basicConfig(level = logging.DEBUG)
 528         try:
 529                 os.makedirs(constants._data_path_)
 530         except OSError, e:
 531                 if e.errno != 17:
 532                         raise
 533
 534         val = run_gonvert()
 535         sys.exit(val)