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89 lines
3.3 KiB
Python
89 lines
3.3 KiB
Python
# -*- coding: iso-8859-1 -*-
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# Copyright (C) 2011-2014 Bastian Kleineidam
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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from PyQt4 import QtCore
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EmptyQVariant = QtCore.QVariant()
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class RecentDocumentModel(QtCore.QAbstractListModel):
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"""Model class for list of recent documents."""
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def __init__ (self, parent=None, documents=[], maxentries=10):
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"""Set document list."""
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super(RecentDocumentModel, self).__init__(parent)
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self.maxentries = maxentries
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self.documents = documents[:maxentries]
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def rowCount (self, parent=QtCore.QModelIndex()):
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"""Return number of documents."""
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return len(self.documents)
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def index (self, row, column=0, parent=QtCore.QModelIndex()):
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"""Return index of document in given row."""
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return self.createIndex(row, column)
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def data (self, index, role=QtCore.Qt.DisplayRole):
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"""Return data at given index for given role."""
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V = QtCore.QVariant
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if not index.isValid() or \
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not (0 <= index.row() < len(self.documents)) or \
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index.column() != 0:
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return EmptyQVariant
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if role == QtCore.Qt.DisplayRole:
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return V(self.documents[index.row()])
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return EmptyQVariant
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def headerData (self, section, orientation, role):
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"""Return header column data for given parameters."""
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return EmptyQVariant
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def flags (self, index):
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"""Return flags that given valid item index is enabled and
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selected."""
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if not index.isValid():
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return 0
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return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
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def clear (self):
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"""Empty the document list."""
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self.beginResetModel()
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self.documents = []
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self.endResetModel()
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def add_document (self, document):
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"""Add document to model."""
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if not document:
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return False
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assert isinstance(document, unicode)
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while document in self.documents:
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row = self.documents.index(document)
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self.beginRemoveRows(QtCore.QModelIndex(), row, row)
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del self.documents[row]
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self.endRemoveRows()
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while len(self.documents) >= self.maxentries:
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row = len(self.documents) - 1
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self.beginRemoveRows(QtCore.QModelIndex(), row, row)
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del self.documents[row]
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self.endRemoveRows()
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self.beginInsertRows(QtCore.QModelIndex(), 0, 0)
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self.documents.insert(0, document)
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self.endInsertRows()
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return True
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def get_documents (self):
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"""Return copy of document list."""
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return self.documents[:]
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