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