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 Persist settings
  55         # @todo Favorites
  56         # @todo Fullscreen support (showFullscreen, showNormal)
  57         # @todo Close Window / Quit keyboard shortcuts
  58         # @todo Ctrl+l support
  59         # @todo Unit conversion window: focus always on input, arrows switch units
  60
  61         _DATA_PATHS = [
  62                 os.path.dirname(__file__),
  63                 os.path.join(os.path.dirname(__file__), "../data"),
  64                 os.path.join(os.path.dirname(__file__), "../lib"),
  65                 '/usr/share/gonvert',
  66                 '/usr/lib/gonvert',
  67         ]
  68
  69         def __init__(self):
  70                 self._dataPath = ""
  71                 for dataPath in self._DATA_PATHS:
  72                         appIconPath = os.path.join(dataPath, "pixmaps", "gonvert.png")
  73                         if os.path.isfile(appIconPath):
  74                                 self._dataPath = dataPath
  75                                 break
  76                 else:
  77                         raise RuntimeError("UI Descriptor not found!")
  78                 self._appIconPath = appIconPath
  79                 self._recent = []
  80
  81                 self._jumpWindow = None
  82                 self._recentWindow = None
  83                 self._catWindow = None
  84
  85                 self._jumpAction = QtGui.QAction(None)
  86                 self._jumpAction.setText("Quick Jump")
  87                 self._jumpAction.setStatusTip("Search for a unit and jump straight to it")
  88                 self._jumpAction.setToolTip("Search for a unit and jump straight to it")
  89                 self._jumpAction.setShortcut(QtGui.QKeySequence("CTRL+j"))
  90                 self._jumpAction.triggered.connect(self._on_jump_start)
  91
  92                 self._recentAction = QtGui.QAction(None)
  93                 self._recentAction.setText("Recent Units")
  94                 self._recentAction.setStatusTip("View the recent units")
  95                 self._recentAction.setToolTip("View the recent units")
  96                 self._recentAction.setShortcut(QtGui.QKeySequence("CTRL+r"))
  97                 self._recentAction.triggered.connect(self._on_recent_start)
  98
  99                 self.request_category()
 100
 101         def request_category(self):
 102                 if self._catWindow is not None:
 103                         self._catWindow.close()
 104                         self._catWindow = None
 105                 self._catWindow = CategoryWindow(None, self)
 106                 return self._catWindow
 107
 108         def search_units(self):
 109                 if self._jumpWindow is not None:
 110                         self._jumpWindow.close()
 111                         self._jumpWindow = None
 112                 self._jumpWindow = QuickJump(None, self)
 113                 return self._jumpWindow
 114
 115         def show_recent(self):
 116                 if self._recentWindow is not None:
 117                         self._recentWindow.close()
 118                         self._recentWindow = None
 119                 self._recentWindow = Recent(None, self)
 120                 return self._recentWindow
 121
 122         def add_recent(self, categoryName, unitName):
 123                 catUnit = categoryName, unitName
 124                 try:
 125                         self._recent.remove(catUnit)
 126                 except ValueError:
 127                         pass # ignore if its not already in the recent history
 128                 self._recent.append(catUnit)
 129
 130         def get_recent_unit(self, categoryName):
 131                 for catName, unitName in reversed(self._recent):
 132                         if catName == categoryName:
 133                                 return unitName
 134                 else:
 135                         return ""
 136
 137         def get_recent(self):
 138                 return reversed(self._recent)
 139
 140         @property
 141         def appIconPath(self):
 142                 return self._appIconPath
 143
 144         @property
 145         def jumpAction(self):
 146                 return self._jumpAction
 147
 148         @property
 149         def recentAction(self):
 150                 return self._recentAction
 151
 152         @misc_utils.log_exception(_moduleLogger)
 153         def _on_jump_start(self, checked = False):
 154                 self.search_units()
 155
 156         @misc_utils.log_exception(_moduleLogger)
 157         def _on_recent_start(self, checked = False):
 158                 self.show_recent()
 159
 160
 161 class CategoryWindow(object):
 162
 163         def __init__(self, parent, app):
 164                 self._app = app
 165                 self._unitWindow = None
 166
 167                 self._categories = QtGui.QTreeWidget()
 168                 self._categories.setHeaderLabels(["Categories"])
 169                 self._categories.itemClicked.connect(self._on_category_clicked)
 170                 self._categories.setHeaderHidden(True)
 171                 self._categories.setAlternatingRowColors(True)
 172                 for catName in unit_data.UNIT_CATEGORIES:
 173                         twi = QtGui.QTreeWidgetItem(self._categories)
 174                         twi.setText(0, catName)
 175
 176                 self._layout = QtGui.QVBoxLayout()
 177                 self._layout.addWidget(self._categories)
 178
 179                 centralWidget = QtGui.QWidget()
 180                 centralWidget.setLayout(self._layout)
 181
 182                 self._window = QtGui.QMainWindow(parent)
 183                 if parent is not None:
 184                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 185                 self._window.setWindowTitle("%s - Categories" % constants.__pretty_app_name__)
 186                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 187                 self._window.setCentralWidget(centralWidget)
 188
 189                 viewMenu = self._window.menuBar().addMenu("&View")
 190                 viewMenu.addAction(self._app.jumpAction)
 191                 viewMenu.addAction(self._app.recentAction)
 192
 193                 self._window.show()
 194
 195         def close(self):
 196                 if self._unitWindow is not None:
 197                         self._unitWindow.close()
 198                         self._unitWindow = None
 199                 self._window.close()
 200
 201         def selectCategory(self, categoryName):
 202                 if self._unitWindow is not None:
 203                         self._unitWindow.close()
 204                         self._unitWindow = None
 205                 self._unitWindow = UnitWindow(self._window, categoryName, self._app)
 206                 return self._unitWindow
 207
 208         @misc_utils.log_exception(_moduleLogger)
 209         def _on_category_clicked(self, item, columnIndex):
 210                 categoryName = unicode(item.text(0))
 211                 self.selectCategory(categoryName)
 212
 213
 214 class QuickJump(object):
 215
 216         MINIMAL_ENTRY = 3
 217
 218         def __init__(self, parent, app):
 219                 self._app = app
 220
 221                 self._searchLabel = QtGui.QLabel("Search:")
 222                 self._searchEntry = QtGui.QLineEdit("")
 223                 self._searchEntry.textEdited.connect(self._on_search_edited)
 224
 225                 self._entryLayout = QtGui.QHBoxLayout()
 226                 self._entryLayout.addWidget(self._searchLabel)
 227                 self._entryLayout.addWidget(self._searchEntry)
 228
 229                 self._resultsBox = QtGui.QTreeWidget()
 230                 self._resultsBox.setHeaderLabels(["Categories", "Units"])
 231                 self._resultsBox.setHeaderHidden(True)
 232                 self._resultsBox.setAlternatingRowColors(True)
 233                 self._resultsBox.itemClicked.connect(self._on_result_clicked)
 234
 235                 self._layout = QtGui.QVBoxLayout()
 236                 self._layout.addLayout(self._entryLayout)
 237                 self._layout.addWidget(self._resultsBox)
 238
 239                 centralWidget = QtGui.QWidget()
 240                 centralWidget.setLayout(self._layout)
 241
 242                 self._window = QtGui.QMainWindow(parent)
 243                 if parent is not None:
 244                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 245                 self._window.setWindowTitle("%s - Quick Jump" % constants.__pretty_app_name__)
 246                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 247                 self._window.setCentralWidget(centralWidget)
 248
 249                 self._window.show()
 250
 251         def close(self):
 252                 self._window.close()
 253
 254         @misc_utils.log_exception(_moduleLogger)
 255         def _on_result_clicked(self, item, columnIndex):
 256                 categoryName = unicode(item.text(0))
 257                 unitName = unicode(item.text(1))
 258                 catWindow = self._app.request_category()
 259                 unitsWindow = catWindow.selectCategory(categoryName)
 260                 unitsWindow.select_unit(unitName)
 261                 self.close()
 262
 263         @misc_utils.log_exception(_moduleLogger)
 264         def _on_search_edited(self, *args):
 265                 userInput = self._searchEntry.text()
 266                 if len(userInput) <  self.MINIMAL_ENTRY:
 267                         return
 268
 269                 self._resultsBox.clear()
 270                 lowerInput = str(userInput).lower()
 271                 for catIndex, category in enumerate(unit_data.UNIT_CATEGORIES):
 272                         units = unit_data.get_units(category)
 273                         for unitIndex, unit in enumerate(units):
 274                                 loweredUnit = unit.lower()
 275                                 if lowerInput in loweredUnit:
 276                                         twi = QtGui.QTreeWidgetItem(self._resultsBox)
 277                                         twi.setText(0, category)
 278                                         twi.setText(1, unit)
 279
 280
 281 class Recent(object):
 282
 283         def __init__(self, parent, app):
 284                 self._app = app
 285
 286                 self._resultsBox = QtGui.QTreeWidget()
 287                 self._resultsBox.setHeaderLabels(["Categories", "Units"])
 288                 self._resultsBox.setHeaderHidden(True)
 289                 self._resultsBox.setAlternatingRowColors(True)
 290                 self._resultsBox.itemClicked.connect(self._on_result_clicked)
 291
 292                 self._layout = QtGui.QVBoxLayout()
 293                 self._layout.addWidget(self._resultsBox)
 294
 295                 centralWidget = QtGui.QWidget()
 296                 centralWidget.setLayout(self._layout)
 297
 298                 self._window = QtGui.QMainWindow(parent)
 299                 if parent is not None:
 300                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 301                 self._window.setWindowTitle("%s - Recent" % constants.__pretty_app_name__)
 302                 self._window.setWindowIcon(QtGui.QIcon(self._app.appIconPath))
 303                 self._window.setCentralWidget(centralWidget)
 304
 305                 for cat, unit in self._app.get_recent():
 306                         twi = QtGui.QTreeWidgetItem(self._resultsBox)
 307                         twi.setText(0, cat)
 308                         twi.setText(1, unit)
 309
 310                 self._window.show()
 311
 312         def close(self):
 313                 self._window.close()
 314
 315         @misc_utils.log_exception(_moduleLogger)
 316         def _on_result_clicked(self, item, columnIndex):
 317                 categoryName = unicode(item.text(0))
 318                 unitName = unicode(item.text(1))
 319                 catWindow = self._app.request_category()
 320                 unitsWindow = catWindow.selectCategory(categoryName)
 321                 unitsWindow.select_unit(unitName)
 322                 self.close()
 323
 324
 325 class UnitData(object):
 326
 327         HEADERS = ["Name", "Value", "", "Unit"]
 328         ALIGNMENT = [QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignLeft, QtCore.Qt.AlignLeft]
 329
 330         def __init__(self, name, unit, description, conversion):
 331                 self._name = name
 332                 self._unit = unit
 333                 self._description = description
 334                 self._conversion = conversion
 335
 336                 self._value = 0.0
 337                 self._integerDisplay, self._fractionalDisplay = split_number(self._value)
 338
 339         @property
 340         def name(self):
 341                 return self._name
 342
 343         @property
 344         def value(self):
 345                 return self._value
 346
 347         def update_value(self, newValue):
 348                 self._value = newValue
 349                 self._integerDisplay, self._fractionalDisplay = split_number(newValue)
 350
 351         @property
 352         def unit(self):
 353                 return self._unit
 354
 355         @property
 356         def conversion(self):
 357                 return self._conversion
 358
 359         def data(self, column):
 360                 try:
 361                         return [self._name, self._integerDisplay, self._fractionalDisplay, self._unit][column]
 362                 except IndexError:
 363                         return None
 364
 365
 366 class UnitModel(QtCore.QAbstractItemModel):
 367
 368         def __init__(self, categoryName, parent=None):
 369                 super(UnitModel, self).__init__(parent)
 370                 self._categoryName = categoryName
 371                 self._unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
 372
 373                 self._children = []
 374                 for key in unit_data.get_units(self._categoryName):
 375                         conversion, unit, description = self._unitData[key]
 376                         self._children.append(UnitData(key, unit, description, conversion))
 377
 378         @misc_utils.log_exception(_moduleLogger)
 379         def columnCount(self, parent):
 380                 if parent.isValid():
 381                         return 0
 382                 else:
 383                         return len(UnitData.HEADERS)
 384
 385         @misc_utils.log_exception(_moduleLogger)
 386         def data(self, index, role):
 387                 if not index.isValid():
 388                         return None
 389                 elif role == QtCore.Qt.TextAlignmentRole:
 390                         return UnitData.ALIGNMENT[index.column()]
 391                 elif role != QtCore.Qt.DisplayRole:
 392                         return None
 393
 394                 item = index.internalPointer()
 395                 if isinstance(item, UnitData):
 396                         return item.data(index.column())
 397                 elif item is UnitData.HEADERS:
 398                         return item[index.column()]
 399
 400         @misc_utils.log_exception(_moduleLogger)
 401         def sort(self, column, order = QtCore.Qt.AscendingOrder):
 402                 isReverse = order == QtCore.Qt.AscendingOrder
 403                 if column == 0:
 404                         key_func = lambda item: item.name
 405                 elif column in [1, 2]:
 406                         key_func = lambda item: item.value
 407                 elif column == 3:
 408                         key_func = lambda item: item.unit
 409                 self._children.sort(key=key_func, reverse = isReverse)
 410
 411                 self._all_changed()
 412
 413         @misc_utils.log_exception(_moduleLogger)
 414         def flags(self, index):
 415                 if not index.isValid():
 416                         return QtCore.Qt.NoItemFlags
 417
 418                 return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
 419
 420         @misc_utils.log_exception(_moduleLogger)
 421         def headerData(self, section, orientation, role):
 422                 if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
 423                         return UnitData.HEADERS[section]
 424
 425                 return None
 426
 427         @misc_utils.log_exception(_moduleLogger)
 428         def index(self, row, column, parent):
 429                 if not self.hasIndex(row, column, parent):
 430                         return QtCore.QModelIndex()
 431
 432                 if parent.isValid():
 433                         return QtCore.QModelIndex()
 434
 435                 parentItem = UnitData.HEADERS
 436                 childItem = self._children[row]
 437                 if childItem:
 438                         return self.createIndex(row, column, childItem)
 439                 else:
 440                         return QtCore.QModelIndex()
 441
 442         @misc_utils.log_exception(_moduleLogger)
 443         def parent(self, index):
 444                 if not index.isValid():
 445                         return QtCore.QModelIndex()
 446
 447                 childItem = index.internalPointer()
 448                 if isinstance(childItem, UnitData):
 449                         return QtCore.QModelIndex()
 450                 elif childItem is UnitData.HEADERS:
 451                         return None
 452
 453         @misc_utils.log_exception(_moduleLogger)
 454         def rowCount(self, parent):
 455                 if 0 < parent.column():
 456                         return 0
 457
 458                 if not parent.isValid():
 459                         return len(self._children)
 460                 else:
 461                         return len(self._children)
 462
 463         def get_unit(self, index):
 464                 return self._children[index]
 465
 466         def index_unit(self, unitName):
 467                 for i, child in enumerate(self._children):
 468                         if child.name == unitName:
 469                                 return i
 470                 else:
 471                         raise RuntimeError("Unit not found")
 472
 473         def update_values(self, fromIndex, userInput):
 474                 value = self._sanitize_value(userInput)
 475                 func, arg = self._children[fromIndex].conversion
 476                 base = func.to_base(value, arg)
 477                 for i, child in enumerate(self._children):
 478                         if i == fromIndex:
 479                                 continue
 480                         func, arg = child.conversion
 481                         newValue = func.from_base(base, arg)
 482                         child.update_value(newValue)
 483
 484                 self._all_changed()
 485
 486         def _all_changed(self):
 487                 topLeft = self.createIndex(0, 1, self._children[0])
 488                 bottomRight = self.createIndex(len(self._children)-1, 2, self._children[-1])
 489                 self.dataChanged.emit(topLeft, bottomRight)
 490
 491         def _sanitize_value(self, userEntry):
 492                 if self._categoryName == "Computer Numbers":
 493                         if userEntry == '':
 494                                 value = '0'
 495                         else:
 496                                 value = userEntry
 497                 else:
 498                         if userEntry == '':
 499                                 value = 0.0
 500                         else:
 501                                 value = float(userEntry)
 502                 return value
 503
 504
 505 class UnitWindow(object):
 506
 507         def __init__(self, parent, category, app):
 508                 self._app = app
 509                 self._categoryName = category
 510                 self._selectedIndex = 0
 511
 512                 self._selectedUnitName = QtGui.QLabel()
 513                 self._selectedUnitValue = QtGui.QLineEdit()
 514                 self._selectedUnitValue.textEdited.connect(self._on_value_edited)
 515                 self._selectedUnitSymbol = QtGui.QLabel()
 516
 517                 self._selectedUnitLayout = QtGui.QHBoxLayout()
 518                 self._selectedUnitLayout.addWidget(self._selectedUnitName)
 519                 self._selectedUnitLayout.addWidget(self._selectedUnitValue)
 520                 self._selectedUnitLayout.addWidget(self._selectedUnitSymbol)
 521
 522                 self._unitsModel = UnitModel(self._categoryName)
 523                 self._unitsView = QtGui.QTreeView()
 524                 self._unitsView.setModel(self._unitsModel)
 525                 self._unitsView.clicked.connect(self._on_unit_clicked)
 526                 self._unitsView.setUniformRowHeights(True)
 527                 self._unitsView.header().setSortIndicatorShown(True)
 528                 self._unitsView.header().setClickable(True)
 529                 self._unitsView.setSortingEnabled(True)
 530                 self._unitsView.setAlternatingRowColors(True)
 531                 if True:
 532                         self._unitsView.setHeaderHidden(True)
 533
 534                 self._layout = QtGui.QVBoxLayout()
 535                 self._layout.addLayout(self._selectedUnitLayout)
 536                 self._layout.addWidget(self._unitsView)
 537
 538                 centralWidget = QtGui.QWidget()
 539                 centralWidget.setLayout(self._layout)
 540
 541                 self._window = QtGui.QMainWindow(parent)
 542                 if parent is not None:
 543                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 544                 self._window.setWindowTitle("%s - %s" % (constants.__pretty_app_name__, category))
 545                 self._window.setWindowIcon(QtGui.QIcon(app.appIconPath))
 546                 self._window.setCentralWidget(centralWidget)
 547
 548                 defaultUnitName = self._app.get_recent_unit(self._categoryName)
 549                 if defaultUnitName:
 550                         self.select_unit(defaultUnitName)
 551                 else:
 552                         self._select_unit(0)
 553                 self._unitsModel.sort(1)
 554
 555                 self._sortActionGroup = QtGui.QActionGroup(None)
 556                 self._sortByNameAction = QtGui.QAction(self._sortActionGroup)
 557                 self._sortByNameAction.setText("Sort By Name")
 558                 self._sortByNameAction.setStatusTip("Sort the units by name")
 559                 self._sortByNameAction.setToolTip("Sort the units by name")
 560                 self._sortByValueAction = QtGui.QAction(self._sortActionGroup)
 561                 self._sortByValueAction.setText("Sort By Value")
 562                 self._sortByValueAction.setStatusTip("Sort the units by value")
 563                 self._sortByValueAction.setToolTip("Sort the units by value")
 564                 self._sortByUnitAction = QtGui.QAction(self._sortActionGroup)
 565                 self._sortByUnitAction.setText("Sort By Unit")
 566                 self._sortByUnitAction.setStatusTip("Sort the units by unit")
 567                 self._sortByUnitAction.setToolTip("Sort the units by unit")
 568
 569                 self._sortByValueAction.setChecked(True)
 570
 571                 viewMenu = self._window.menuBar().addMenu("&View")
 572                 viewMenu.addAction(self._app.jumpAction)
 573                 viewMenu.addAction(self._app.recentAction)
 574                 viewMenu.addSeparator()
 575                 viewMenu.addAction(self._sortByNameAction)
 576                 viewMenu.addAction(self._sortByValueAction)
 577                 viewMenu.addAction(self._sortByUnitAction)
 578
 579                 self._sortByNameAction.triggered.connect(self._on_sort_by_name)
 580                 self._sortByValueAction.triggered.connect(self._on_sort_by_value)
 581                 self._sortByUnitAction.triggered.connect(self._on_sort_by_unit)
 582
 583                 self._window.show()
 584
 585         def close(self):
 586                 self._window.close()
 587
 588         def select_unit(self, unitName):
 589                 index = self._unitsModel.index_unit(unitName)
 590                 self._select_unit(index)
 591
 592         @misc_utils.log_exception(_moduleLogger)
 593         def _on_sort_by_name(self, checked = False):
 594                 self._unitsModel.sort(0, QtCore.Qt.DescendingOrder)
 595
 596         @misc_utils.log_exception(_moduleLogger)
 597         def _on_sort_by_value(self, checked = False):
 598                 self._unitsModel.sort(1)
 599
 600         @misc_utils.log_exception(_moduleLogger)
 601         def _on_sort_by_unit(self, checked = False):
 602                 self._unitsModel.sort(3, QtCore.Qt.DescendingOrder)
 603
 604         @misc_utils.log_exception(_moduleLogger)
 605         def _on_unit_clicked(self, index):
 606                 self._select_unit(index.row())
 607
 608         @misc_utils.log_exception(_moduleLogger)
 609         def _on_value_edited(self, *args):
 610                 userInput = self._selectedUnitValue.text()
 611                 self._unitsModel.update_values(self._selectedIndex, str(userInput))
 612
 613         def _select_unit(self, index):
 614                 unit = self._unitsModel.get_unit(index)
 615                 self._selectedUnitName.setText(unit.name)
 616                 self._selectedUnitValue.setText(str(unit.value))
 617                 self._selectedUnitSymbol.setText(unit.unit)
 618
 619                 self._selectedIndex = index
 620                 qindex = self._unitsModel.createIndex(index, 0, self._unitsModel.get_unit(index))
 621                 self._unitsView.scrollTo(qindex)
 622                 self._app.add_recent(self._categoryName, self._unitsModel.get_unit(index).name)
 623
 624
 625 def run_gonvert():
 626         app = QtGui.QApplication([])
 627         handle = Gonvert()
 628         return app.exec_()
 629
 630
 631 if __name__ == "__main__":
 632         logging.basicConfig(level = logging.DEBUG)
 633         try:
 634                 os.makedirs(constants._data_path_)
 635         except OSError, e:
 636                 if e.errno != 17:
 637                         raise
 638
 639         val = run_gonvert()
 640         sys.exit(val)