def __init__ (self, filePath = None, engine = None):
"""
Default constructor.
'filePath' - path to the *.CSV file.
'engine' - reference to CSVFileEngine object.
Used if the 'filePath' parameter has None value, ignored otherwise
"""
QtCore.QAbstractTableModel.__init__(self)
self._engine = engine
if self._engine == None:
engineFile = AutoResizeableFile(filePath)
self._engine = CSVFileEngine(engineFile)
def setUp(self):
self._file = AutoResizeableFile()
self._file.writeLine("T1;T02;T003")
self._engine = CSVFileEngine(self._file)
class CSVFileEngine_text(unittest.TestCase):
def setUp(self):
self._file = AutoResizeableFile()
self._file.writeLine("T1;T02;T003")
self._engine = CSVFileEngine(self._file)
def tearDown(self):
del self._file
del self._engine
def testEngineOperations(self):
self.assertEqual(self._engine.columnCount(), 3, ".columnCount() return error")
self.assertEqual(self._engine.rowCount(), 0, ".rowCount() return error")
self.assertEqual(tuple(self._engine.titles()), ("T1", "T02", "T003"), ".titles() return error")
self._engine.insertRow(0, ("a", "aaa", "aa"))
self._engine.insertRow(1, ("bb", "aaa", "bbb"))
self._engine.insertRow(0, ("ccc", "c", "bbb"))
self._engine.insertRow(3, ("dddd", "eeeee", "aa"))
self.assertEqual(self._engine.rowData(0), (0, "ccc", "c", "bbb"), ".rowData() return error")
self.assertEqual(self._engine.rowData(1), (1, "a", "aaa", "aa"), ".rowData() return error")
self.assertEqual(self._engine.rowData(2), (2, "bb", "aaa", "bbb"), ".rowData() return error")
self.assertEqual(self._engine.rowData(3), (3, "dddd", "eeeee", "aa"), ".rowData() return error")
self.assertEqual(self._engine.rowCount(), 4, ".rowCount() return error")
self._engine.removeRowAction(1)
self._engine.removeRowAction(2)
self.assertEqual(self._engine.rowCount(), 2, ".rowCount() return error")
self.assertEqual(self._engine.rowData(0), (0, "ccc", "c", "bbb"), ".rowData() return error")
self.assertEqual(self._engine.rowData(1), (1, "bb", "aaa", "bbb"), ".rowData() return error")
searchResult = self._engine.searchRows(2, "bbb")
self.assertEqual(searchResult.rowCount(), 2, "Search result length error")
self._engine.insertRow(0, ("a", "aaa", ""))
self._engine.insertRow(1, ("bb", "aaa", "bbb"))
self._engine.insertRow(2, ("ccc", "c", "bbb"))
self._engine.insertRow(3, ("dddd", "eeeee", "aa"))
self.assertEqual(self._engine.rowCount(), 6, ".rowCount() return error")
self._engine.changeFieldData(0, 2, "CHANGED")
self._engine.changeFieldData(2, 2, "0")
self._engine.changeFieldData(5, 2, "GO")
self._engine.changeFieldData(4, 0, "")
self.assertEqual(self._engine.fieldData(0, 2), "CHANGED", ".fieldData() return error")
self.assertEqual(self._engine.fieldData(2, 2), "0", ".fieldData() return error")
self.assertEqual(self._engine.fieldData(5, 2), "GO", ".fieldData() return error")
self.assertEqual(self._engine.fieldData(4, 0), "", ".fieldData() return error")
searchResult = self._engine.searchRows(1, "aaa")
self.assertEqual(searchResult.rowCount(), 3, "Search result length error")
self._engine.insertRow(0, ("", "", ""))
self._engine.changeFieldData(0, 0, "HI")
self._engine.changeFieldData(0, 1, "HELLO")
self._engine.changeFieldData(0, 2, "BYE")
self.assertEqual(tuple(self._engine.rowData(0)), (0, "HI", "HELLO", "BYE"), ".rowData() return error")
class CSVTableModel(QtCore.QAbstractTableModel):
"""
A class for representing *.CSV files as QAbstractTableModel objects
"""
def __init__ (self, filePath = None, engine = None):
"""
Default constructor.
'filePath' - path to the *.CSV file.
'engine' - reference to CSVFileEngine object.
Used if the 'filePath' parameter has None value, ignored otherwise
"""
QtCore.QAbstractTableModel.__init__(self)
self._engine = engine
if self._engine == None:
engineFile = AutoResizeableFile(filePath)
self._engine = CSVFileEngine(engineFile)
def rowCount(self, modelIndex = QtCore.QModelIndex()):
"""
Reimplemented from QAbstractTableModel class
"""
return self._engine.rowCount()
def columnCount(self, modelIndex = QtCore.QModelIndex()):
"""
Reimplemented from QAbstractTableModel class
"""
return self._engine.columnCount()
def data(self, index, role = QtCore.Qt.DisplayRole):
"""
Reimplemented from QAbstractTableModel class
"""
index = self._validateQModelIndex(index)
if not index.isValid() or role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
return QtCore.QVariant(self._engine.fieldData(index.row(), index.column()))
def headerData(self, section, orientation, role = QtCore.Qt.DisplayRole):
"""
Reimplemented from QAbstractTableModel class
"""
if role == QtCore.Qt.DisplayRole:
if orientation == QtCore.Qt.Horizontal:
return QtCore.QVariant(self._engine.titles()[section])
else:
return QtCore.QVariant(section + 1)
return QtCore.QVariant()
def insertRows(self, row, count, parent = QtCore.QModelIndex()):
"""
Reimplemented from QAbstractTableModel class
"""
for i in xrange(row, row + count):
self.insertRow(i)
return True
def insertRow(self, row, parent = QtCore.QModelIndex()):
"""
Reimplemented from QAbstractTableModel class
"""
emptyData = []
for i in xrange(0, self._engine.columnCount()):
emptyData.append("")
QtCore.QAbstractTableModel.beginInsertRows(self, parent, row, row)
self._engine.insertRow(row, emptyData)
QtCore.QAbstractTableModel.endInsertRows(self)
return True
def removeRow(self, row, parent = QtCore.QModelIndex()):
"""
Reimplemented from QAbstractTableModel class
"""
QtCore.QAbstractTableModel.beginRemoveRows(self, parent, row, row)
self._engine.removeRow(row)
QtCore.QAbstractTableModel.endRemoveRows(self)
return True
def removeRows(self, row, count, parent = QtCore.QModelIndex()):
"""
Reimplemented from QAbstractTableModel class
"""
for i in xrange(row, row + count):
self.removeRow(row)
return True
def setData(self, index, value, role = QtCore.Qt.EditRole):
"""
Reimplemented from QAbstractTableModel class
"""
self._engine.changeFieldData(index.row(), index.column(), value)
return True
def search(self, keyColumn, key):
"""
Searches rows that have the same string value in 'keyColumn' as 'key'.
Returns a CSVTableModel object, representing search results.
'keyColumn' - zero-based column index
'key' - string-convertable object to search
"""
return CSVTableModel(None, self._engine.searchRows(keyColumn, key))
def flags(self, index):
"""
Reimplemented from QAbstractTableModel class
"""
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
def save(self):
"""
Saves all changes made on the disk.
"""
self._engine.flush()
def _validateQModelIndex(self, index):
if not isinstance(index, QtCore.QModelIndex):
raise TypeError("Index must be have 'QModelIndex' type",
{"raisingObject": self, "index": index})
return index
