class TreeModel(QAbstractItemModel):
checkChanged = Signal(int, str)
def __init__(self, headers, data, tablemodel, parent=None):
super(TreeModel, self).__init__(parent)
rootData = [header for header in headers]
self.rootItem = TreeItem(rootData)
self.treeDict = data
self.tablemodel = tablemodel
self.setupModelData(data, self.rootItem)
self.examingParents = False
self.examiningChildren = False
def changeLeafCheck(self, source):
curNode = self.rootItem.child(0)
keyNames = source.split("/")
curRow = 0
for key in keyNames:
for i in range(curNode.childCount()):
if curNode.child(i).itemData[0] == key:
curNode = curNode.child(i)
curRow = i
break
anIndex = self.createIndex(curRow, curNode.columnCount(), curNode)
self.setData(anIndex, 0, Qt.CheckStateRole)
def columnCount(self, parent=QModelIndex()):
return self.rootItem.columnCount()
def data(self, index, role):
if not index.isValid():
return None
item = self.getItem(index)
if role == Qt.DisplayRole:
return item.data(index.column())
elif role == Qt.CheckStateRole:
return item.checked
return None
def flags(self, index):
if not index.isValid():
return 0
return Qt.ItemIsUserCheckable | super(TreeModel, self).flags(index)
def getItem(self, index):
if index.isValid():
item = index.internalPointer()
if item:
return item
return self.rootItem
def headerData(self, section, orientation, role=Qt.DisplayRole):
if orientation == Qt.Horizontal and role == Qt.DisplayRole:
return self.rootItem.data(section)
return None
def index(self, row, column, parent=QModelIndex()):
if parent.isValid() and parent.column() != 0:
return QModelIndex()
parentItem = self.getItem(parent)
childItem = parentItem.child(row)
if childItem:
return self.createIndex(row, column, childItem)
else:
return QModelIndex()
def insertColumns(self, position, columns, parent=QModelIndex()):
self.beginInsertColumns(parent, position, position + columns - 1)
success = self.rootItem.insertColumns(position, columns)
self.endInsertColumns()
return success
def insertRows(self, position, rows, parent=QModelIndex()):
parentItem = self.getItem(parent)
self.beginInsertRows(parent, position, position + rows - 1)
success = parentItem.insertChildren(position, rows,
self.rootItem.columnCount())
self.endInsertRows()
return success
def parent(self, index):
if not index.isValid():
return QModelIndex()
childItem = self.getItem(index)
parentItem = childItem.parent()
if parentItem == self.rootItem:
return QModelIndex()
return self.createIndex(parentItem.childNumber(), 0, parentItem)
def removeColumns(self, position, columns, parent=QModelIndex()):
self.beginRemoveColumns(parent, position, position + columns - 1)
success = self.rootItem.removeColumns(position, columns)
self.endRemoveColumns()
if self.rootItem.columnCount() == 0:
self.removeRows(0, self.rowCount())
return success
def removeRows(self, position, rows, parent=QModelIndex()):
parentItem = self.getItem(parent)
self.beginRemoveRows(parent, position, position + rows - 1)
success = parentItem.removeChildren(position, rows)
self.endRemoveRows()
return success
def rowCount(self, parent=QModelIndex()):
parentItem = self.getItem(parent)
return parentItem.childCount()
def setData(self, index, value, role=Qt.EditRole):
if role == Qt.EditRole:
item = self.getItem(index)
result = item.setData(index.column(), value)
if result:
self.dataChanged.emit(index, index)
return result
elif role == Qt.CheckStateRole:
item = self.getItem(index)
item.checked = value
checked = item.checked
source=""
sourceList= []
while item.parentItem:
sourceList.insert(0,item.itemData[0]+"/")
item = item.parentItem
if self.examingParents == False:
self.checkChanged.emit(checked,source.join(sourceList)[:-1])
self.checkChildren(index,value)
self.checkParent(index)
self.dataChanged.emit(index, index)
return True
return False
def setHeaderData(self, section, orientation, value, role=Qt.EditRole):
if role != Qt.EditRole or orientation != Qt.Horizontal:
return False
result = self.rootItem.setData(section, value)
if result:
self.headerDataChanged.emit(orientation, section, section)
return result
def setupModelData(self, data, parent):
visited={}
queue=[]
grandParents = {}
for key in data.keys():
visited[(parent.itemData[0])]=[key]
queue.append((key,parent,""))
grandParents[key] = (data[key],parent)
curDict = data
tempSource= ""
while queue:
poppedItem = queue.pop(0)
child = poppedItem[0]
parentOfChild = poppedItem[1]
childSource = poppedItem[2]
parent = parentOfChild
parent.insertChildren(parent.childCount(),1,self.rootItem.columnCount())
parent.child(parent.childCount() -1).setData(0,child)
if child in grandParents:
curDict = grandParents[child][0]
tempSource = childSource+child+"/"
for curChild in range(grandParents[child][1].childCount()):
if child == grandParents[child][1].child(curChild).itemData[0]:
parent = grandParents[child][1].child(curChild)
visited[(parent.itemData[0])]=[]
if isinstance(curDict, dict):
for key in curDict.keys():
if key not in visited[(parent.itemData[0])]:
visited[(parent.itemData[0])].append(key)
queue.append((key,parent,tempSource))
if (isinstance(curDict[key],dict)):
grandParents[key]= (curDict[key],parent)
else:
self.tablemodel.addRow(curDict,tempSource,key)
def checkChildren(self,index,value):
self.examingChildren = True
if not index.isValid() or self.examingParents:
self.examingChildren = False
return
else:
childCount = self.rowCount(index)
for i in range(childCount):
child = index.child(i, 0)
if value == 1:
return
self.setData(child, value, Qt.CheckStateRole)
self.checkChildren(child,value)
def checkParent(self,index):
self.examingParents = True
if not index.isValid() or self.examiningChildren:
self.examingParents = False
return
else:
parent = index.parent()
if parent.data() == None:
self.examingParents = False
return
value = self.checkChildrenStates(parent)
self.setData(parent, value, Qt.CheckStateRole)
def checkChildrenStates(self, index):
childCount = self.rowCount(index)
checkedChildrenCount = 0
for i in range(childCount):
child = index.child(i, 0)
if child.data(Qt.CheckStateRole) == Qt.Checked or child.data(Qt.CheckStateRole) == Qt.PartiallyChecked:
checkedChildrenCount += 1
if checkedChildrenCount == 0:
return 0
elif checkedChildrenCount == childCount:
return 2
else:
return 1
class TreeModel(QAbstractItemModel):
#Roles to filter input and output view
Item_Role = Qt.UserRole
def __init__(self, headers, data, parent=None) -> None:
super(TreeModel, self).__init__(parent)
rootData = []
for header in headers:
rootData.append(header)
self._rootItem = TreeItem(rootData)
#self._setupModelData(data.split('\n'), self._rootItem)
def rootItem(self) -> TreeItem:
"""
Return the root item of this model
"""
return self._rootItem
def getItem(self, index) -> TreeItem:
"""
Return the TreeItem from model using the index
"""
if index.isValid():
item = index.internalPointer()
if item:
return item
return self._rootItem
def data(self, index, role) -> object:
"""
Return data from model to the view
"""
if not index.isValid():
return None
item = self.getItem(index)
if role == Qt.DisplayRole or role == Qt.EditRole:
return item.data(index.column())
if role == TreeModel.Item_Role:
return item
return QVariant()
def headerData(self, section, orientation, role) -> object:
if orientation == Qt.Horizontal and role == Qt.DisplayRole:
return self._rootItem.data(section)
def index(self, row, column, parent=QModelIndex()) -> QModelIndex:
"""
Obtain model indexes corresponding to children of given parent item
"""
#Only return model indexes for child items if the parent index in invalid (root item)
#or if it has a zero column number
if parent.isValid() and parent.column() != 0:
return QModelIndex()
parentItem = self.getItem(parent)
if not parentItem:
return QModelIndex()
#Create a model index to uniquely with the row and column numbers
#and a pointer to the item
childItem = parentItem.child(row)
if childItem:
return self.createIndex(row, column, childItem)
return QModelIndex()
def parent(self, index) -> QModelIndex:
"""
Return the model indexes for parents of item by finding the correspoinding item for a
give model index, using its parent() function to obtain its parent item, then
creating a model index to represent the parent.
Item without parents, including the root item, are handled by returning a null model index.
Otherwise, a model index ins created and returned as in the index() function, with a suitable row number,
but with a zero column
"""
if not index.isValid():
return QModelIndex()
childItem = self.getItem(index)
parentItem = None
if childItem:
parentItem = childItem.parent()
if parentItem == self._rootItem or not parentItem:
return QModelIndex()
return self.createIndex(parentItem.childNumber(), 0, parentItem)
def rowCount(self, parent=QModelIndex()) -> int:
"""
Return the children that parent has
"""
parentItem = self.getItem(parent)
if parentItem:
return parentItem.childCount()
else:
return 0
def columnCount(self, parent=QModelIndex()) -> int:
"""
All items are defined to have the same number of columns associated with them
"""
return self._rootItem.columnCount()
def flags(self, index) -> Qt.ItemFlags:
"""
Return flags ItemIsEditable, ItemIsSelectable and ItemIsEnable to be able to edit and select item
"""
if not index.isValid():
return Qt.NoItemFlags
return Qt.ItemIsEditable | Qt.ItemIsSelectable | Qt.ItemIsEnabled
def setData(self, index, value, role=Qt.EditRole) -> bool:
"""
Set data from view back to the model
"""
if role != Qt.EditRole:
return False
item = self.getItem(index)
result = item.setData(index.column(), value)
if result:
self.dataChanged.emit(index, index, [Qt.DisplayRole, Qt.EditRole])
return result
def setHeaderData(self,
section,
orientation,
value,
role=Qt.EditRole) -> bool:
if role != Qt.EditRole or orientation != Qt.Horizontal:
return False
result = self._rootItem.setData(section, value)
if result:
self.headerDataChanged.emit(orientation, section, section)
return result
def insertColumns(self, position, columns, parent=QModelIndex()) -> bool:
"""
Insert columns into the model
"""
self.beginInsertColumns(parent, position, position + columns - 1)
success = self._rootItem.insertColumns(position, columns)
self.endInsertColumns()
return success
def removeColumns(self, position, columns, parent=QModelIndex()) -> bool:
"""
Remove columns from the model
"""
self.beginRemoveColumns(parent, position, position + columns - 1)
success = self._rootItem.removeColumns(position, columns)
self.endRemoveColumns()
if self._rootItem.columnCount() == 0:
self.removeRows(0, self.rowCount())
return success
def insertRows(self, position, rows, parent=QModelIndex()) -> bool:
"""
Insert rows into model
"""
parentItem = self.getItem(parent)
if not parentItem:
return False
self.beginInsertRows(parent, position, position + rows - 1)
success = parentItem.insertChildren(position, rows,
self._rootItem.columnCount())
self.endInsertRows()
return success
def removeRows(self, position, rows, parent=QModelIndex()) -> bool:
"""
Remove rows from model
"""
parentItem = self.getItem(parent)
if not parentItem:
return False
self.beginRemoveRows(parent, position, position + rows - 1)
success = parentItem.removeChildren(position, rows)
self.endRemoveRows()
return success