vcs.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
 220         @misc_utils.log_exception(_moduleLogger)
 221         def _on_search_edited(self, *args):
 222                 userInput = self._searchEntry.text()
 223                 if len(userInput) <  self.MINIMAL_ENTRY:
 224                         return
 225
 226                 lowerInput = str(userInput).lower()
 227                 for catIndex, category in enumerate(unit_data.UNIT_CATEGORIES):
 228                         units = unit_data.get_units(category)
 229                         for unitIndex, unit in enumerate(units):
 230                                 loweredUnit = unit.lower()
 231                                 if lowerInput in loweredUnit:
 232                                         twi = QtGui.QTreeWidgetItem(self._resultsBox)
 233                                         twi.setText(0, category)
 234                                         twi.setText(1, unit)
 235
 236
 237 class UnitData(object):
 238
 239         HEADERS = ["Name", "Value", "", "Unit"]
 240         ALIGNMENT = [QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignLeft, QtCore.Qt.AlignLeft]
 241
 242         def __init__(self, name, unit, description, conversion):
 243                 self._name = name
 244                 self._unit = unit
 245                 self._description = description
 246                 self._conversion = conversion
 247
 248                 self._value = 0.0
 249                 self._integerDisplay, self._fractionalDisplay = split_number(self._value)
 250
 251         @property
 252         def name(self):
 253                 return self._name
 254
 255         @property
 256         def value(self):
 257                 return self._value
 258
 259         def update_value(self, newValue):
 260                 self._value = newValue
 261                 self._integerDisplay, self._fractionalDisplay = split_number(newValue)
 262
 263         @property
 264         def unit(self):
 265                 return self._unit
 266
 267         @property
 268         def conversion(self):
 269                 return self._conversion
 270
 271         def data(self, column):
 272                 try:
 273                         return [self._name, self._integerDisplay, self._fractionalDisplay, self._unit][column]
 274                 except IndexError:
 275                         return None
 276
 277
 278 class UnitModel(QtCore.QAbstractItemModel):
 279
 280         def __init__(self, categoryName, parent=None):
 281                 super(UnitModel, self).__init__(parent)
 282                 self._categoryName = categoryName
 283                 self._unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
 284
 285                 self._children = []
 286                 for key in unit_data.get_units(self._categoryName):
 287                         conversion, unit, description = self._unitData[key]
 288                         self._children.append(UnitData(key, unit, description, conversion))
 289
 290         @misc_utils.log_exception(_moduleLogger)
 291         def columnCount(self, parent):
 292                 if parent.isValid():
 293                         return 0
 294                 else:
 295                         return len(UnitData.HEADERS)
 296
 297         @misc_utils.log_exception(_moduleLogger)
 298         def data(self, index, role):
 299                 if not index.isValid():
 300                         return None
 301                 elif role == QtCore.Qt.TextAlignmentRole:
 302                         return UnitData.ALIGNMENT[index.column()]
 303                 elif role != QtCore.Qt.DisplayRole:
 304                         return None
 305
 306                 item = index.internalPointer()
 307                 if isinstance(item, UnitData):
 308                         return item.data(index.column())
 309                 elif item is UnitData.HEADERS:
 310                         return item[index.column()]
 311
 312         @misc_utils.log_exception(_moduleLogger)
 313         def sort(self, column, order = QtCore.Qt.AscendingOrder):
 314                 isReverse = order == QtCore.Qt.AscendingOrder
 315                 if column == 0:
 316                         key_func = lambda item: item.name
 317                 elif column in [1, 2]:
 318                         key_func = lambda item: item.value
 319                 elif column == 3:
 320                         key_func = lambda item: item.unit
 321                 self._children.sort(key=key_func, reverse = isReverse)
 322
 323                 self._all_changed()
 324
 325         @misc_utils.log_exception(_moduleLogger)
 326         def flags(self, index):
 327                 if not index.isValid():
 328                         return QtCore.Qt.NoItemFlags
 329
 330                 return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
 331
 332         @misc_utils.log_exception(_moduleLogger)
 333         def headerData(self, section, orientation, role):
 334                 if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
 335                         return UnitData.HEADERS[section]
 336
 337                 return None
 338
 339         @misc_utils.log_exception(_moduleLogger)
 340         def index(self, row, column, parent):
 341                 if not self.hasIndex(row, column, parent):
 342                         return QtCore.QModelIndex()
 343
 344                 if parent.isValid():
 345                         return QtCore.QModelIndex()
 346
 347                 parentItem = UnitData.HEADERS
 348                 childItem = self._children[row]
 349                 if childItem:
 350                         return self.createIndex(row, column, childItem)
 351                 else:
 352                         return QtCore.QModelIndex()
 353
 354         @misc_utils.log_exception(_moduleLogger)
 355         def parent(self, index):
 356                 if not index.isValid():
 357                         return QtCore.QModelIndex()
 358
 359                 childItem = index.internalPointer()
 360                 if isinstance(childItem, UnitData):
 361                         return QtCore.QModelIndex()
 362                 elif childItem is UnitData.HEADERS:
 363                         return None
 364
 365         @misc_utils.log_exception(_moduleLogger)
 366         def rowCount(self, parent):
 367                 if 0 < parent.column():
 368                         return 0
 369
 370                 if not parent.isValid():
 371                         return len(self._children)
 372                 else:
 373                         return len(self._children)
 374
 375         def get_unit(self, index):
 376                 return self._children[index]
 377
 378         def index_unit(self, unitName):
 379                 for i, child in enumerate(self._children):
 380                         if child.name == unitName:
 381                                 return i
 382                 else:
 383                         raise RuntimeError("Unit not found")
 384
 385         def update_values(self, fromIndex, userInput):
 386                 value = self._sanitize_value(userInput)
 387                 func, arg = self._children[fromIndex].conversion
 388                 base = func.to_base(value, arg)
 389                 for i, child in enumerate(self._children):
 390                         if i == fromIndex:
 391                                 continue
 392                         func, arg = child.conversion
 393                         newValue = func.from_base(base, arg)
 394                         child.update_value(newValue)
 395
 396                 self._all_changed()
 397
 398         def _all_changed(self):
 399                 topLeft = self.createIndex(0, 1, self._children[0])
 400                 bottomRight = self.createIndex(len(self._children)-1, 2, self._children[-1])
 401                 self.dataChanged.emit(topLeft, bottomRight)
 402
 403         def _sanitize_value(self, userEntry):
 404                 if self._categoryName == "Computer Numbers":
 405                         if userEntry == '':
 406                                 value = '0'
 407                         else:
 408                                 value = userEntry
 409                 else:
 410                         if userEntry == '':
 411                                 value = 0.0
 412                         else:
 413                                 value = float(userEntry)
 414                 return value
 415
 416
 417 class UnitWindow(object):
 418
 419         def __init__(self, parent, category, app):
 420                 self._app = app
 421                 self._categoryName = category
 422                 self._selectedIndex = 0
 423
 424                 self._selectedUnitName = QtGui.QLabel()
 425                 self._selectedUnitValue = QtGui.QLineEdit()
 426                 self._selectedUnitValue.textEdited.connect(self._on_value_edited)
 427                 self._selectedUnitSymbol = QtGui.QLabel()
 428
 429                 self._selectedUnitLayout = QtGui.QHBoxLayout()
 430                 self._selectedUnitLayout.addWidget(self._selectedUnitName)
 431                 self._selectedUnitLayout.addWidget(self._selectedUnitValue)
 432                 self._selectedUnitLayout.addWidget(self._selectedUnitSymbol)
 433
 434                 self._unitsModel = UnitModel(self._categoryName)
 435                 self._unitsView = QtGui.QTreeView()
 436                 self._unitsView.setModel(self._unitsModel)
 437                 self._unitsView.clicked.connect(self._on_unit_clicked)
 438                 self._unitsView.setUniformRowHeights(True)
 439                 self._unitsView.header().setSortIndicatorShown(True)
 440                 self._unitsView.header().setClickable(True)
 441                 self._unitsView.setSortingEnabled(True)
 442                 self._unitsView.setAlternatingRowColors(True)
 443                 if True:
 444                         self._unitsView.setHeaderHidden(True)
 445
 446                 self._layout = QtGui.QVBoxLayout()
 447                 self._layout.addLayout(self._selectedUnitLayout)
 448                 self._layout.addWidget(self._unitsView)
 449
 450                 centralWidget = QtGui.QWidget()
 451                 centralWidget.setLayout(self._layout)
 452
 453                 self._window = QtGui.QMainWindow(parent)
 454                 if parent is not None:
 455                         self._window.setWindowModality(QtCore.Qt.WindowModal)
 456                 self._window.setWindowTitle("%s - %s" % (constants.__pretty_app_name__, category))
 457                 self._window.setWindowIcon(QtGui.QIcon(app.appIconPath))
 458                 self._window.setCentralWidget(centralWidget)
 459
 460                 self._select_unit(0)
 461                 self._unitsModel.sort(1)
 462
 463                 self._sortActionGroup = QtGui.QActionGroup(None)
 464                 self._sortByNameAction = QtGui.QAction(self._sortActionGroup)
 465                 self._sortByNameAction.setText("Sort By Name")
 466                 self._sortByNameAction.setStatusTip("Sort the units by name")
 467                 self._sortByNameAction.setToolTip("Sort the units by name")
 468                 self._sortByValueAction = QtGui.QAction(self._sortActionGroup)
 469                 self._sortByValueAction.setText("Sort By Value")
 470                 self._sortByValueAction.setStatusTip("Sort the units by value")
 471                 self._sortByValueAction.setToolTip("Sort the units by value")
 472                 self._sortByUnitAction = QtGui.QAction(self._sortActionGroup)
 473                 self._sortByUnitAction.setText("Sort By Unit")
 474                 self._sortByUnitAction.setStatusTip("Sort the units by unit")
 475                 self._sortByUnitAction.setToolTip("Sort the units by unit")
 476
 477                 self._sortByValueAction.setChecked(True)
 478
 479                 viewMenu = self._window.menuBar().addMenu("&View")
 480                 viewMenu.addAction(self._app.jumpAction)
 481                 viewMenu.addSeparator()
 482                 viewMenu.addAction(self._sortByNameAction)
 483                 viewMenu.addAction(self._sortByValueAction)
 484                 viewMenu.addAction(self._sortByUnitAction)
 485
 486                 self._sortByNameAction.triggered.connect(self._on_sort_by_name)
 487                 self._sortByValueAction.triggered.connect(self._on_sort_by_value)
 488                 self._sortByUnitAction.triggered.connect(self._on_sort_by_unit)
 489
 490                 self._window.show()
 491
 492         def close(self):
 493                 self._window.close()
 494
 495         def select_unit(self, unitName):
 496                 index = self._unitsModel.index_unit(unitName)
 497                 self._select_unit(index)
 498
 499         @misc_utils.log_exception(_moduleLogger)
 500         def _on_sort_by_name(self, checked = False):
 501                 self._unitsModel.sort(0, QtCore.Qt.DescendingOrder)
 502
 503         @misc_utils.log_exception(_moduleLogger)
 504         def _on_sort_by_value(self, checked = False):
 505                 self._unitsModel.sort(1)
 506
 507         @misc_utils.log_exception(_moduleLogger)
 508         def _on_sort_by_unit(self, checked = False):
 509                 self._unitsModel.sort(3, QtCore.Qt.DescendingOrder)
 510
 511         @misc_utils.log_exception(_moduleLogger)
 512         def _on_unit_clicked(self, index):
 513                 self._select_unit(index.row())
 514
 515         @misc_utils.log_exception(_moduleLogger)
 516         def _on_value_edited(self, *args):
 517                 userInput = self._selectedUnitValue.text()
 518                 self._unitsModel.update_values(self._selectedIndex, str(userInput))
 519
 520         def _select_unit(self, index):
 521                 unit = self._unitsModel.get_unit(index)
 522                 self._selectedUnitName.setText(unit.name)
 523                 self._selectedUnitValue.setText(str(unit.value))
 524                 self._selectedUnitSymbol.setText(unit.unit)
 525
 526                 self._selectedIndex = index
 527                 qindex = self._unitsModel.createIndex(index, 0, self._unitsModel.get_unit(index))
 528                 self._unitsView.scrollTo(qindex)
 529
 530
 531 def run_gonvert():
 532         app = QtGui.QApplication([])
 533         handle = Gonvert()
 534         return app.exec_()
 535
 536
 537 if __name__ == "__main__":
 538         logging.basicConfig(level = logging.DEBUG)
 539         try:
 540                 os.makedirs(constants._data_path_)
 541         except OSError, e:
 542                 if e.errno != 17:
 543                         raise
 544
 545         val = run_gonvert()
 546         sys.exit(val)