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TagViewModel.py
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TagViewModel.py
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from PyQt5.QtCore import Qt, QAbstractItemModel, QModelIndex
from Database import Tag
class TagViewModel(QAbstractItemModel):
def __init__(self, db):
QAbstractItemModel.__init__(self)
self._root = TagViewNode(None)
self.db = db
self.reloadTags()
def rowCount(self, in_index):
if in_index.isValid():
return in_index.internalPointer().childCount()
return self._root.childCount()
def columnCount(self, in_index):
return 1
def addChild(self, in_node, in_parent):
if not in_parent or not in_parent.isValid():
parent = self._root
else:
parent = in_parent.internalPointer()
parent.addChild(in_node)
def index(self, in_row, in_column, in_parent=None):
if not in_parent or not in_parent.isValid():
parent = self._root
else:
parent = in_parent.internalPointer()
if not QAbstractItemModel.hasIndex(self, in_row, in_column, in_parent):
return QModelIndex()
child = parent.child(in_row)
if child:
return QAbstractItemModel.createIndex(self, in_row, in_column, child)
else:
return QModelIndex()
def parent(self, in_index):
if in_index.isValid():
p = in_index.internalPointer().parent()
if p:
return QAbstractItemModel.createIndex(self, p.row(),0,p)
return QModelIndex()
def columnCount(self, in_index):
if in_index.isValid():
return in_index.internalPointer().columnCount()
return self._root.columnCount()
def data(self, in_index, role):
if not in_index.isValid():
return None
node = in_index.internalPointer()
if role == Qt.DisplayRole:
return node.data(in_index.column())
return None
def walkNode(self, p_node):
children = p_node.tag.children
for child in children:
new_node = TagViewNode("", child)
p_node.addChild(new_node)
self.walkNode(new_node)
def reloadTags(self):
root_tags = self.db.session.query(Tag).filter(Tag.parent == None).all()
for tag in root_tags:
new_node = TagViewNode("", tag)
self._root.addChild(new_node)
self.walkNode(new_node)
def reset(self):
super().beginResetModel()
self._root._children = []
super().endResetModel()
self.reloadTags()
class TagViewNode(object):
def __init__(self, in_data, in_tag=None):
if in_tag:
self.tag = in_tag
in_data = in_tag.name
self._data = in_data
if type(in_data) == tuple:
self._data = list(in_data)
if type(in_data) == str or not hasattr(in_data, '__getitem__'):
self._data = [in_data]
self._columncount = len(self._data)
self._children = []
self._parent = None
self._row = 0
self.media = None
def data(self, in_column):
if in_column >= 0 and in_column < len(self._data):
return self._data[in_column]
def columnCount(self):
return self._columncount
def childCount(self):
return len(self._children)
def child(self, in_row):
if in_row >= 0 and in_row < self.childCount():
return self._children[in_row]
def parent(self):
return self._parent
def row(self):
return self._row
def childCount(self):
return len(self._children)
def addChild(self, in_child):
in_child._parent = self
in_child._row = len(self._children)
self._children.append(in_child)
self._columncount = max(in_child.columnCount(), self._columncount)