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         # @todo Remember last selection
  55         # @todo Recent
  56         # @todo Favorites
  57         # @todo Fullscreen support (showFullscreen, showNormal)
  58         # @todo Close Window / Quit keyboard shortcuts
  59         # @todo Ctrl+l support
  60         # @todo Unit conversion window: focus always on input, arrows switch units
  61
  62         _DATA_PATHS = [
  63                 os.path.dirname(__file__),
  64                 os.path.join(os.path.dirname(__file__), "../data"),
  65                 os.path.join(os.path.dirname(__file__), "../lib"),
  66                 '/usr/share/gonvert',
  67                 '/usr/lib/gonvert',
  68         ]
  69
  70         def __init__(self):
  71                 self._dataPath = ""
  72                 for dataPath in self._DATA_PATHS:
  73                         appIconPath = os.path.join(dataPath, "pixmaps", "gonvert.png")
  74                         if os.path.isfile(appIconPath):
  75                                 self._dataPath = dataPath
  76                                 break
  77                 else:
  78                         raise RuntimeError("UI Descriptor not found!")
  79                 self._appIconPath = appIconPath
  80
  81                 self._jumpWindow = None
  82                 self._catWindow = None
  83
  84                 self._jumpAction = QtGui.QAction(None)
  85                 self._jumpAction.setText("Quick Jump")
  86                 self._jumpAction.setStatusTip("Search for a unit and jump straight to it")
  87                 self._jumpAction.setToolTip("Search for a unit and jump straight to it")
  88                 self._jumpAction.setShortcut(QtGui.QKeySequence("CTRL+j"))
  89                 self._jumpAction.triggered.connect(self._on_jump_start)
  90
  91                 self.request_category()
  92
  93         def request_category(self):
  94                 if self._catWindow is not None:
  95                         self._catWindow.close()
  96                         self._catWindow = None
  97                 self._catWindow = CategoryWindow(None, self)
  98                 return self._catWindow
  99
 100         def search_units(self):
 101                 if self._jumpWindow is not None:
 102                         self._jumpWindow.close()
 103                         self._jumpWindow = None
 104                 self._jumpWindow = QuickJump(None, self)
 105                 return self._jumpWindow
 106
 107         @property
 108         def appIconPath(self):
 109                 return self._appIconPath
 110
 111         @property
 112         def jumpAction(self):
 113                 return self._jumpAction
 114
 115         @misc_utils.log_exception(_moduleLogger)
 116         def _on_jump_start(self, checked = False):
 117                 self.search_units()
 118
 119
 120 class CategoryWindow(object):
 121
 122         def __init__(self, parent, app):
 123                 self._app = app
 124                 self._unitWindow = None
 125
 126                 self._categories = QtGui.QTreeWidget()
 127                 self._categories.setHeaderLabels(["Categories"])
 128                 self._categories.itemClicked.connect(self._on_category_clicked)
 129                 self._categories.setHeaderHidden(True)
 130                 self._categories.setAlternatingRowColors(True)
 131                 for catName in unit_data.UNIT_CATEGORIES:
 132                         twi = QtGui.QTreeWidgetItem(self._categories)
 133                         twi.setText(0, catName)
 134
 135                 self._layout = QtGui.QVBoxLayout()
 136                 self._layout.addWidget(self._categories)
 137
 138                 centralWidget = QtGui.QWidget()
 139                 centralWidget.setLayout(self._layout)
 140
 141                 self._window = QtGui.QMainWindow(parent)
 142                 if parent is not None:
 143                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 144                 self._window.setWindowTitle("%s - Categories" % constants.__pretty_app_name__)
 145                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 146                 self._window.setCentralWidget(centralWidget)
 147
 148                 viewMenu = self._window.menuBar().addMenu("&View")
 149                 viewMenu.addAction(self._app.jumpAction)
 150
 151                 self._window.show()
 152
 153         def close(self):
 154                 if self._unitWindow is not None:
 155                         self._unitWindow.close()
 156                         self._unitWindow = None
 157                 self._window.close()
 158
 159         def selectCategory(self, categoryName):
 160                 if self._unitWindow is not None:
 161                         self._unitWindow.close()
 162                         self._unitWindow = None
 163                 self._unitWindow = UnitWindow(self._window, categoryName, self._app)
 164                 return self._unitWindow
 165
 166         @misc_utils.log_exception(_moduleLogger)
 167         def _on_category_clicked(self, item, columnIndex):
 168                 categoryName = unicode(item.text(0))
 169                 self.selectCategory(categoryName)
 170
 171
 172 class QuickJump(object):
 173
 174         MINIMAL_ENTRY = 3
 175
 176         def __init__(self, parent, app):
 177                 self._app = app
 178
 179                 self._searchLabel = QtGui.QLabel("Search:")
 180                 self._searchEntry = QtGui.QLineEdit("")
 181                 self._searchEntry.textEdited.connect(self._on_search_edited)
 182
 183                 self._entryLayout = QtGui.QHBoxLayout()
 184                 self._entryLayout.addWidget(self._searchLabel)
 185                 self._entryLayout.addWidget(self._searchEntry)
 186
 187                 self._resultsBox = QtGui.QTreeWidget()
 188                 self._resultsBox.setHeaderLabels(["Categories", "Units"])
 189                 self._resultsBox.setHeaderHidden(True)
 190                 self._resultsBox.setAlternatingRowColors(True)
 191                 self._resultsBox.itemClicked.connect(self._on_result_clicked)
 192
 193                 self._layout = QtGui.QVBoxLayout()
 194                 self._layout.addLayout(self._entryLayout)
 195                 self._layout.addWidget(self._resultsBox)
 196
 197                 centralWidget = QtGui.QWidget()
 198                 centralWidget.setLayout(self._layout)
 199
 200                 self._window = QtGui.QMainWindow(parent)
 201                 if parent is not None:
 202                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 203                 self._window.setWindowTitle("%s - Quick Jump" % constants.__pretty_app_name__)
 204                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 205                 self._window.setCentralWidget(centralWidget)
 206
 207                 self._window.show()
 208
 209         def close(self):
 210                 self._window.close()
 211
 212         @misc_utils.log_exception(_moduleLogger)
 213         def _on_result_clicked(self, item, columnIndex):
 214                 categoryName = unicode(item.text(0))
 215                 unitName = unicode(item.text(1))
 216                 catWindow = self._app.request_category()
 217                 unitsWindow = catWindow.selectCategory(categoryName)
 218                 unitsWindow.select_unit(unitName)
 219                 self.close()
 220
 221         @misc_utils.log_exception(_moduleLogger)
 222         def _on_search_edited(self, *args):
 223                 userInput = self._searchEntry.text()
 224                 if len(userInput) <  self.MINIMAL_ENTRY:
 225                         return
 226
 227                 self._resultsBox.clear()
 228                 lowerInput = str(userInput).lower()
 229                 for catIndex, category in enumerate(unit_data.UNIT_CATEGORIES):
 230                         units = unit_data.get_units(category)
 231                         for unitIndex, unit in enumerate(units):
 232                                 loweredUnit = unit.lower()
 233                                 if lowerInput in loweredUnit:
 234                                         twi = QtGui.QTreeWidgetItem(self._resultsBox)
 235                                         twi.setText(0, category)
 236                                         twi.setText(1, unit)
 237
 238
 239 class UnitData(object):
 240
 241         HEADERS = ["Name", "Value", "", "Unit"]
 242         ALIGNMENT = [QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignLeft, QtCore.Qt.AlignLeft]
 243
 244         def __init__(self, name, unit, description, conversion):
 245                 self._name = name
 246                 self._unit = unit
 247                 self._description = description
 248                 self._conversion = conversion
 249
 250                 self._value = 0.0
 251                 self._integerDisplay, self._fractionalDisplay = split_number(self._value)
 252
 253         @property
 254         def name(self):
 255                 return self._name
 256
 257         @property
 258         def value(self):
 259                 return self._value
 260
 261         def update_value(self, newValue):
 262                 self._value = newValue
 263                 self._integerDisplay, self._fractionalDisplay = split_number(newValue)
 264
 265         @property
 266         def unit(self):
 267                 return self._unit
 268
 269         @property
 270         def conversion(self):
 271                 return self._conversion
 272
 273         def data(self, column):
 274                 try:
 275                         return [self._name, self._integerDisplay, self._fractionalDisplay, self._unit][column]
 276                 except IndexError:
 277                         return None
 278
 279
 280 class UnitModel(QtCore.QAbstractItemModel):
 281
 282         def __init__(self, categoryName, parent=None):
 283                 super(UnitModel, self).__init__(parent)
 284                 self._categoryName = categoryName
 285                 self._unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
 286
 287                 self._children = []
 288                 for key in unit_data.get_units(self._categoryName):
 289                         conversion, unit, description = self._unitData[key]
 290                         self._children.append(UnitData(key, unit, description, conversion))
 291
 292         @misc_utils.log_exception(_moduleLogger)
 293         def columnCount(self, parent):
 294                 if parent.isValid():
 295                         return 0
 296                 else:
 297                         return len(UnitData.HEADERS)
 298
 299         @misc_utils.log_exception(_moduleLogger)
 300         def data(self, index, role):
 301                 if not index.isValid():
 302                         return None
 303                 elif role == QtCore.Qt.TextAlignmentRole:
 304                         return UnitData.ALIGNMENT[index.column()]
 305                 elif role != QtCore.Qt.DisplayRole:
 306                         return None
 307
 308                 item = index.internalPointer()
 309                 if isinstance(item, UnitData):
 310                         return item.data(index.column())
 311                 elif item is UnitData.HEADERS:
 312                         return item[index.column()]
 313
 314         @misc_utils.log_exception(_moduleLogger)
 315         def sort(self, column, order = QtCore.Qt.AscendingOrder):
 316                 isReverse = order == QtCore.Qt.AscendingOrder
 317                 if column == 0:
 318                         key_func = lambda item: item.name
 319                 elif column in [1, 2]:
 320                         key_func = lambda item: item.value
 321                 elif column == 3:
 322                         key_func = lambda item: item.unit
 323                 self._children.sort(key=key_func, reverse = isReverse)
 324
 325                 self._all_changed()
 326
 327         @misc_utils.log_exception(_moduleLogger)
 328         def flags(self, index):
 329                 if not index.isValid():
 330                         return QtCore.Qt.NoItemFlags
 331
 332                 return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
 333
 334         @misc_utils.log_exception(_moduleLogger)
 335         def headerData(self, section, orientation, role):
 336                 if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
 337                         return UnitData.HEADERS[section]
 338
 339                 return None
 340
 341         @misc_utils.log_exception(_moduleLogger)
 342         def index(self, row, column, parent):
 343                 if not self.hasIndex(row, column, parent):
 344                         return QtCore.QModelIndex()
 345
 346                 if parent.isValid():
 347                         return QtCore.QModelIndex()
 348
 349                 parentItem = UnitData.HEADERS
 350                 childItem = self._children[row]
 351                 if childItem:
 352                         return self.createIndex(row, column, childItem)
 353                 else:
 354                         return QtCore.QModelIndex()
 355
 356         @misc_utils.log_exception(_moduleLogger)
 357         def parent(self, index):
 358                 if not index.isValid():
 359                         return QtCore.QModelIndex()
 360
 361                 childItem = index.internalPointer()
 362                 if isinstance(childItem, UnitData):
 363                         return QtCore.QModelIndex()
 364                 elif childItem is UnitData.HEADERS:
 365                         return None
 366
 367         @misc_utils.log_exception(_moduleLogger)
 368         def rowCount(self, parent):
 369                 if 0 < parent.column():
 370                         return 0
 371
 372                 if not parent.isValid():
 373                         return len(self._children)
 374                 else:
 375                         return len(self._children)
 376
 377         def get_unit(self, index):
 378                 return self._children[index]
 379
 380         def index_unit(self, unitName):
 381                 for i, child in enumerate(self._children):
 382                         if child.name == unitName:
 383                                 return i
 384                 else:
 385                         raise RuntimeError("Unit not found")
 386
 387         def update_values(self, fromIndex, userInput):
 388                 value = self._sanitize_value(userInput)
 389                 func, arg = self._children[fromIndex].conversion
 390                 base = func.to_base(value, arg)
 391                 for i, child in enumerate(self._children):
 392                         if i == fromIndex:
 393                                 continue
 394                         func, arg = child.conversion
 395                         newValue = func.from_base(base, arg)
 396                         child.update_value(newValue)
 397
 398                 self._all_changed()
 399
 400         def _all_changed(self):
 401                 topLeft = self.createIndex(0, 1, self._children[0])
 402                 bottomRight = self.createIndex(len(self._children)-1, 2, self._children[-1])
 403                 self.dataChanged.emit(topLeft, bottomRight)
 404
 405         def _sanitize_value(self, userEntry):
 406                 if self._categoryName == "Computer Numbers":
 407                         if userEntry == '':
 408                                 value = '0'
 409                         else:
 410                                 value = userEntry
 411                 else:
 412                         if userEntry == '':
 413                                 value = 0.0
 414                         else:
 415                                 value = float(userEntry)
 416                 return value
 417
 418
 419 class UnitWindow(object):
 420
 421         def __init__(self, parent, category, app):
 422                 self._app = app
 423                 self._categoryName = category
 424                 self._selectedIndex = 0
 425
 426                 self._selectedUnitName = QtGui.QLabel()
 427                 self._selectedUnitValue = QtGui.QLineEdit()
 428                 self._selectedUnitValue.textEdited.connect(self._on_value_edited)
 429                 self._selectedUnitSymbol = QtGui.QLabel()
 430
 431                 self._selectedUnitLayout = QtGui.QHBoxLayout()
 432                 self._selectedUnitLayout.addWidget(self._selectedUnitName)
 433                 self._selectedUnitLayout.addWidget(self._selectedUnitValue)
 434                 self._selectedUnitLayout.addWidget(self._selectedUnitSymbol)
 435
 436                 self._unitsModel = UnitModel(self._categoryName)
 437                 self._unitsView = QtGui.QTreeView()
 438                 self._unitsView.setModel(self._unitsModel)
 439                 self._unitsView.clicked.connect(self._on_unit_clicked)
 440                 self._unitsView.setUniformRowHeights(True)
 441                 self._unitsView.header().setSortIndicatorShown(True)
 442                 self._unitsView.header().setClickable(True)
 443                 self._unitsView.setSortingEnabled(True)
 444                 self._unitsView.setAlternatingRowColors(True)
 445                 if True:
 446                         self._unitsView.setHeaderHidden(True)
 447
 448                 self._layout = QtGui.QVBoxLayout()
 449                 self._layout.addLayout(self._selectedUnitLayout)
 450                 self._layout.addWidget(self._unitsView)
 451
 452                 centralWidget = QtGui.QWidget()
 453                 centralWidget.setLayout(self._layout)
 454
 455                 self._window = QtGui.QMainWindow(parent)
 456                 if parent is not None:
 457                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 458                 self._window.setWindowTitle("%s - %s" % (constants.__pretty_app_name__, category))
 459                 self._window.setWindowIcon(QtGui.QIcon(app.appIconPath))
 460                 self._window.setCentralWidget(centralWidget)
 461
 462                 self._select_unit(0)
 463                 self._unitsModel.sort(1)
 464
 465                 self._sortActionGroup = QtGui.QActionGroup(None)
 466                 self._sortByNameAction = QtGui.QAction(self._sortActionGroup)
 467                 self._sortByNameAction.setText("Sort By Name")
 468                 self._sortByNameAction.setStatusTip("Sort the units by name")
 469                 self._sortByNameAction.setToolTip("Sort the units by name")
 470                 self._sortByValueAction = QtGui.QAction(self._sortActionGroup)
 471                 self._sortByValueAction.setText("Sort By Value")
 472                 self._sortByValueAction.setStatusTip("Sort the units by value")
 473                 self._sortByValueAction.setToolTip("Sort the units by value")
 474                 self._sortByUnitAction = QtGui.QAction(self._sortActionGroup)
 475                 self._sortByUnitAction.setText("Sort By Unit")
 476                 self._sortByUnitAction.setStatusTip("Sort the units by unit")
 477                 self._sortByUnitAction.setToolTip("Sort the units by unit")
 478
 479                 self._sortByValueAction.setChecked(True)
 480
 481                 viewMenu = self._window.menuBar().addMenu("&View")
 482                 viewMenu.addAction(self._app.jumpAction)
 483                 viewMenu.addSeparator()
 484                 viewMenu.addAction(self._sortByNameAction)
 485                 viewMenu.addAction(self._sortByValueAction)
 486                 viewMenu.addAction(self._sortByUnitAction)
 487
 488                 self._sortByNameAction.triggered.connect(self._on_sort_by_name)
 489                 self._sortByValueAction.triggered.connect(self._on_sort_by_value)
 490                 self._sortByUnitAction.triggered.connect(self._on_sort_by_unit)
 491
 492                 self._window.show()
 493
 494         def close(self):
 495                 self._window.close()
 496
 497         def select_unit(self, unitName):
 498                 index = self._unitsModel.index_unit(unitName)
 499                 self._select_unit(index)
 500
 501         @misc_utils.log_exception(_moduleLogger)
 502         def _on_sort_by_name(self, checked = False):
 503                 self._unitsModel.sort(0, QtCore.Qt.DescendingOrder)
 504
 505         @misc_utils.log_exception(_moduleLogger)
 506         def _on_sort_by_value(self, checked = False):
 507                 self._unitsModel.sort(1)
 508
 509         @misc_utils.log_exception(_moduleLogger)
 510         def _on_sort_by_unit(self, checked = False):
 511                 self._unitsModel.sort(3, QtCore.Qt.DescendingOrder)
 512
 513         @misc_utils.log_exception(_moduleLogger)
 514         def _on_unit_clicked(self, index):
 515                 self._select_unit(index.row())
 516
 517         @misc_utils.log_exception(_moduleLogger)
 518         def _on_value_edited(self, *args):
 519                 userInput = self._selectedUnitValue.text()
 520                 self._unitsModel.update_values(self._selectedIndex, str(userInput))
 521
 522         def _select_unit(self, index):
 523                 unit = self._unitsModel.get_unit(index)
 524                 self._selectedUnitName.setText(unit.name)
 525                 self._selectedUnitValue.setText(str(unit.value))
 526                 self._selectedUnitSymbol.setText(unit.unit)
 527
 528                 self._selectedIndex = index
 529                 qindex = self._unitsModel.createIndex(index, 0, self._unitsModel.get_unit(index))
 530                 self._unitsView.scrollTo(qindex)
 531
 532
 533 def run_gonvert():
 534         app = QtGui.QApplication([])
 535         handle = Gonvert()
 536         return app.exec_()
 537
 538
 539 if __name__ == "__main__":
 540         logging.basicConfig(level = logging.DEBUG)
 541         try:
 542                 os.makedirs(constants._data_path_)
 543         except OSError, e:
 544                 if e.errno != 17:
 545                         raise
 546
 547         val = run_gonvert()
 548         sys.exit(val)