diff -r 000000000000 -r de9c2efb9d02 Helpviewer/History/HistoryTreeModel.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Helpviewer/History/HistoryTreeModel.py Mon Dec 28 16:03:33 2009 +0000
@@ -0,0 +1,382 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2009 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing the history tree model.
+"""
+
+import bisect
+
+from PyQt4.QtCore import *
+from PyQt4.QtGui import QAbstractProxyModel
+
+from HistoryModel import HistoryModel
+
+import UI.PixmapCache
+
+class HistoryTreeModel(QAbstractProxyModel):
+ """
+ Class implementing the history tree model.
+ """
+ def __init__(self, sourceModel, parent = None):
+ """
+ Constructor
+
+ @param sourceModel reference to the source model (QAbstractItemModel)
+ @param parent reference to the parent object (QObject)
+ """
+ QAbstractProxyModel.__init__(self, parent)
+
+ self.__sourceRowCache = []
+ self.__removingDown = False
+
+ self.setSourceModel(sourceModel)
+
+ def headerData(self, section, orientation, role = Qt.DisplayRole):
+ """
+ Public method to get the header data.
+
+ @param section section number (integer)
+ @param orientation header orientation (Qt.Orientation)
+ @param role data role (integer)
+ @return header data (QVariant)
+ """
+ return self.sourceModel().headerData(section, orientation, role)
+
+ def data(self, index, role = Qt.DisplayRole):
+ """
+ Public method to get data from the model.
+
+ @param index index of history entry to get data for (QModelIndex)
+ @param role data role (integer)
+ @return history entry data (QVariant)
+ """
+ if role in [Qt.DisplayRole, Qt.EditRole]:
+ start = index.internalId()
+ if start == 0:
+ offset = self.__sourceDateRow(index.row())
+ if index.column() == 0:
+ idx = self.sourceModel().index(offset, 0)
+ date = idx.data(HistoryModel.DateRole).toDate()
+ if date == QDate.currentDate():
+ return QVariant(self.trUtf8("Earlier Today"))
+ return QVariant(date.toString("yyyy-MM-dd"))
+ if index.column() == 1:
+ return QVariant(self.trUtf8(
+ "%n item(s)", "", self.rowCount(index.sibling(index.row(), 0))))
+
+ elif role == Qt.DecorationRole:
+ if index.column() == 0 and not index.parent().isValid():
+ return QVariant(UI.PixmapCache.getIcon("history.png"))
+
+ elif role == HistoryModel.DateRole:
+ if index.column() == 0 and index.internalId() == 0:
+ offset = self.__sourceDateRow(index.row())
+ idx = self.sourceModel().index(offset, 0)
+ return idx.data(HistoryModel.DateRole)
+
+ return QAbstractProxyModel.data(self, index, role)
+
+ def columnCount(self, parent = QModelIndex()):
+ """
+ Public method to get the number of columns.
+
+ @param parent index of parent (QModelIndex)
+ @return number of columns (integer)
+ """
+ return self.sourceModel().columnCount(self.mapToSource(parent))
+
+ def rowCount(self, parent = QModelIndex()):
+ """
+ Public method to determine the number of rows.
+
+ @param parent index of parent (QModelIndex)
+ @return number of rows (integer)
+ """
+ if parent.internalId() != 0 or \
+ parent.column() > 0 or \
+ self.sourceModel() is None:
+ return 0
+
+ # row count OF dates
+ if not parent.isValid():
+ if self.__sourceRowCache:
+ return len(self.__sourceRowCache)
+
+ currentDate = QDate()
+ rows = 0
+ totalRows = self.sourceModel().rowCount()
+
+ for row in range(totalRows):
+ rowDate = \
+ self.sourceModel().index(row, 0).data(HistoryModel.DateRole).toDate()
+ if rowDate != currentDate:
+ self.__sourceRowCache.append(row)
+ currentDate = rowDate
+ rows += 1
+ return rows
+
+ # row count FOR a date
+ start = self.__sourceDateRow(parent.row())
+ end = self.__sourceDateRow(parent.row() + 1)
+ return end - start
+
+ def __sourceDateRow(self, row):
+ """
+ Private method to translate the top level date row into the offset
+ where that date starts.
+
+ @param row row number of the date (integer)
+ @return offset where that date starts (integer)
+ """
+ if row <= 0:
+ return 0
+
+ if len(self.__sourceRowCache) == 0:
+ self.rowCount(QModelIndex())
+
+ if row >= len(self.__sourceRowCache):
+ if self.sourceModel() is None:
+ return 0
+ return self.sourceModel().rowCount()
+
+ return self.__sourceRowCache[row]
+
+ def mapToSource(self, proxyIndex):
+ """
+ Public method to map an index to the source model index.
+
+ @param proxyIndex reference to a proxy model index (QModelIndex)
+ @return source model index (QModelIndex)
+ """
+ offset = proxyIndex.internalId()
+ if offset == 0:
+ return QModelIndex()
+ startDateRow = self.__sourceDateRow(offset - 1)
+ return self.sourceModel().index(
+ startDateRow + proxyIndex.row(), proxyIndex.column())
+
+ def index(self, row, column, parent = QModelIndex()):
+ """
+ Public method to create an index.
+
+ @param row row number for the index (integer)
+ @param column column number for the index (integer)
+ @param parent index of the parent item (QModelIndex)
+ @return requested index (QModelIndex)
+ """
+ if row < 0 or \
+ column < 0 or \
+ column >= self.columnCount(parent) or \
+ parent.column() > 0:
+ return QModelIndex()
+
+ if not parent.isValid():
+ return self.createIndex(row, column, 0)
+ return self.createIndex(row, column, parent.row() + 1)
+
+ def parent(self, index):
+ """
+ Public method to get the parent index.
+
+ @param index index of item to get parent (QModelIndex)
+ @return index of parent (QModelIndex)
+ """
+ offset = index.internalId()
+ if offset == 0 or not index.isValid():
+ return QModelIndex()
+ return self.createIndex(offset - 1, 0, 0)
+
+ def hasChildren(self, parent = QModelIndex()):
+ """
+ Public method to check, if an entry has some children.
+
+ @param parent index of the entry to check (QModelIndex)
+ @return flag indicating the presence of children (boolean)
+ """
+ grandparent = parent.parent()
+ if not grandparent.isValid():
+ return True
+ return False
+
+ def flags(self, index):
+ """
+ Public method to get the item flags.
+
+ @param index index of the item (QModelIndex)
+ @return flags (Qt.ItemFlags)
+ """
+ if not index.isValid():
+ return Qt.ItemFlags(Qt.NoItemFlags)
+ return Qt.ItemFlags(Qt.ItemIsSelectable | Qt.ItemIsEnabled | Qt.ItemIsDragEnabled)
+
+ def setSourceModel(self, sourceModel):
+ """
+ Public method to set the source model.
+
+ @param sourceModel reference to the source model (QAbstractItemModel)
+ """
+ if self.sourceModel() is not None:
+ self.disconnect(self.sourceModel(),
+ SIGNAL("modelReset()"),
+ self.__sourceReset)
+ self.disconnect(self.sourceModel(),
+ SIGNAL("layoutChanged()"),
+ self.__sourceReset)
+ self.disconnect(self.sourceModel(),
+ SIGNAL("rowsInserted(const QModelIndex &, int, int)"),
+ self.__sourceRowsInserted)
+ self.disconnect(self.sourceModel(),
+ SIGNAL("rowsRemoved(const QModelIndex &, int, int)"),
+ self.__sourceRowsRemoved)
+
+ QAbstractProxyModel.setSourceModel(self, sourceModel)
+
+ if self.sourceModel() is not None:
+ self.__loaded = False
+ self.connect(self.sourceModel(),
+ SIGNAL("modelReset()"),
+ self.__sourceReset)
+ self.connect(self.sourceModel(),
+ SIGNAL("layoutChanged()"),
+ self.__sourceReset)
+ self.connect(self.sourceModel(),
+ SIGNAL("rowsInserted(const QModelIndex &, int, int)"),
+ self.__sourceRowsInserted)
+ self.connect(self.sourceModel(),
+ SIGNAL("rowsRemoved(const QModelIndex &, int, int)"),
+ self.__sourceRowsRemoved)
+
+ self.reset()
+
+ def __sourceReset(self):
+ """
+ Private slot to handle a reset of the source model.
+ """
+ self.__sourceRowCache = []
+ self.reset()
+
+ def __sourceRowsInserted(self, parent, start, end):
+ """
+ Private slot to handle the insertion of data in the source model.
+
+ @param parent reference to the parent index (QModelIndex)
+ @param start start row (integer)
+ @param end end row (integer)
+ """
+ if not parent.isValid():
+ if start != 0 or start != end:
+ self.__sourceRowCache = []
+ self.reset()
+ return
+
+ self.__sourceRowCache = []
+ treeIndex = self.mapFromSource(self.sourceModel().index(start, 0))
+ treeParent = treeIndex.parent()
+ if self.rowCount(treeParent) == 1:
+ self.beginInsertRows(QModelIndex(), 0, 0)
+ self.endInsertRows()
+ else:
+ self.beginInsertRows(treeParent, treeIndex.row(), treeIndex.row())
+ self.endInsertRows()
+
+ def mapFromSource(self, sourceIndex):
+ """
+ Public method to map an index to the proxy model index.
+
+ @param sourceIndex reference to a source model index (QModelIndex)
+ @return proxy model index (QModelIndex)
+ """
+ if not sourceIndex.isValid():
+ return QModelIndex()
+
+ if len(self.__sourceRowCache) == 0:
+ self.rowCount(QModelIndex())
+
+ try:
+ row = self.__sourceRowCache.index(sourceIndex.row())
+ except ValueError:
+ row = bisect.bisect_left(self.__sourceRowCache, sourceIndex.row())
+ if row == len(self.__sourceRowCache) or \
+ self.__sourceRowCache[row] != sourceIndex.row():
+ row -= 1
+ dateRow = max(0, row)
+ row = sourceIndex.row() - self.__sourceRowCache[dateRow]
+ return self.createIndex(row, sourceIndex.column(), dateRow + 1)
+
+ def removeRows(self, row, count, parent = QModelIndex()):
+ """
+ Public method to remove entries from the model.
+
+ @param row row of the first entry to remove (integer)
+ @param count number of entries to remove (integer)
+ @param index of the parent entry (QModelIndex)
+ @return flag indicating successful removal (boolean)
+ """
+ if row < 0 or \
+ count <= 0 or \
+ row + count > self.rowCount(parent):
+ return False
+
+ self.__removingDown = True
+ if parent.isValid() and self.rowCount(parent) == count - row:
+ self.beginRemoveRows(QModelIndex(), parent.row(), parent.row())
+ else:
+ self.beginRemoveRows(parent, row, row + count - 1)
+ if parent.isValid():
+ # removing pages
+ offset = self.__sourceDateRow(parent.row())
+ return self.sourceModel().removeRows(offset + row, count)
+ else:
+ # removing whole dates
+ for i in range(row + count - 1, row - 1, -1):
+ dateParent = self.index(i, 0)
+ offset = self.__sourceDateRow(dateParent.row())
+ if not self.sourceModel().removeRows(offset, self.rowCount(dateParent)):
+ return False
+ return True
+
+ def __sourceRowsRemoved(self, parent, start, end):
+ """
+ Private slot to handle the removal of data in the source model.
+
+ @param parent reference to the parent index (QModelIndex)
+ @param start start row (integer)
+ @param end end row (integer)
+ """
+ if not self.__removingDown:
+ self.__sourceRowCache = []
+ self.reset()
+ return
+
+ if not parent.isValid():
+ if self.__sourceRowCache:
+ i = end
+ while i >= start:
+ try:
+ ind = self.__sourceRowCache.index(i)
+ except ValueError:
+ ind = bisect.bisect_left(self.__sourceRowCache, i)
+ if ind == len(self.__sourceRowCache) or \
+ self.__sourceRowCache[ind] != i:
+ ind -= 1
+ row = max(0, ind)
+ offset = self.__sourceRowCache[row]
+ dateParent = self.index(row, 0)
+ # If we can remove all the rows in the date do that
+ # and skip over them.
+ rc = self.rowCount(dateParent)
+ if i - rc + 1 == offset and start <= i - rc + 1:
+ del self.__sourceRowCache[row]
+ i -= rc + 1
+ else:
+ row += 1
+ i -= 1
+ for j in range(row, len(self.__sourceRowCache)):
+ self.__sourceRowCache[j] -= 1
+
+ if self.__removingDown:
+ self.endRemoveRows()
+ self.__removingDown = False
