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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from PySide6.QtCore import QModelIndex, Qt, QAbstractItemModel
from treeitem import TreeItem
class TreeModel(QAbstractItemModel):
def __init__(self, headers: list, data: str, parent=None):
super().__init__(parent)
self.root_data = headers
self.root_item = TreeItem(self.root_data.copy())
self.setup_model_data(data.split("\n"), self.root_item)
def columnCount(self, parent: QModelIndex = None) -> int:
return self.root_item.column_count()
def data(self, index: QModelIndex, role: int = None):
if not index.isValid():
return None
if role != Qt.DisplayRole and role != Qt.EditRole:
return None
item: TreeItem = self.get_item(index)
return item.data(index.column())
def flags(self, index: QModelIndex) -> Qt.ItemFlags:
if not index.isValid():
return Qt.NoItemFlags
return Qt.ItemIsEditable | QAbstractItemModel.flags(self, index)
def get_item(self, index: QModelIndex = QModelIndex()) -> TreeItem:
if index.isValid():
item: TreeItem = index.internalPointer()
if item:
return item
return self.root_item
def headerData(self, section: int, orientation: Qt.Orientation,
role: int = Qt.DisplayRole):
if orientation == Qt.Horizontal and role == Qt.DisplayRole:
return self.root_item.data(section)
return None
def index(self, row: int, column: int, parent: QModelIndex = QModelIndex()) -> QModelIndex:
if parent.isValid() and parent.column() != 0:
return QModelIndex()
parent_item: TreeItem = self.get_item(parent)
if not parent_item:
return QModelIndex()
child_item: TreeItem = parent_item.child(row)
if child_item:
return self.createIndex(row, column, child_item)
return QModelIndex()
def insertColumns(self, position: int, columns: int,
parent: QModelIndex = QModelIndex()) -> bool:
self.beginInsertColumns(parent, position, position + columns - 1)
success: bool = self.root_item.insert_columns(position, columns)
self.endInsertColumns()
return success
def insertRows(self, position: int, rows: int,
parent: QModelIndex = QModelIndex()) -> bool:
parent_item: TreeItem = self.get_item(parent)
if not parent_item:
return False
self.beginInsertRows(parent, position, position + rows - 1)
column_count = self.root_item.column_count()
success: bool = parent_item.insert_children(position, rows, column_count)
self.endInsertRows()
return success
def parent(self, index: QModelIndex = QModelIndex()) -> QModelIndex:
if not index.isValid():
return QModelIndex()
child_item: TreeItem = self.get_item(index)
if child_item:
parent_item: TreeItem = child_item.parent()
else:
parent_item = None
if parent_item == self.root_item or not parent_item:
return QModelIndex()
return self.createIndex(parent_item.child_number(), 0, parent_item)
def removeColumns(self, position: int, columns: int,
parent: QModelIndex = QModelIndex()) -> bool:
self.beginRemoveColumns(parent, position, position + columns - 1)
success: bool = self.root_item.remove_columns(position, columns)
self.endRemoveColumns()
if self.root_item.column_count() == 0:
self.removeRows(0, self.rowCount())
return success
def removeRows(self, position: int, rows: int,
parent: QModelIndex = QModelIndex()) -> bool:
parent_item: TreeItem = self.get_item(parent)
if not parent_item:
return False
self.beginRemoveRows(parent, position, position + rows - 1)
success: bool = parent_item.remove_children(position, rows)
self.endRemoveRows()
return success
def rowCount(self, parent: QModelIndex = QModelIndex()) -> int:
if parent.isValid() and parent.column() > 0:
return 0
parent_item: TreeItem = self.get_item(parent)
if not parent_item:
return 0
return parent_item.child_count()
def setData(self, index: QModelIndex, value, role: int) -> bool:
if role != Qt.EditRole:
return False
item: TreeItem = self.get_item(index)
result: bool = item.set_data(index.column(), value)
if result:
self.dataChanged.emit(index, index, [Qt.DisplayRole, Qt.EditRole])
return result
def setHeaderData(self, section: int, orientation: Qt.Orientation, value,
role: int = None) -> bool:
if role != Qt.EditRole or orientation != Qt.Horizontal:
return False
result: bool = self.root_item.set_data(section, value)
if result:
self.headerDataChanged.emit(orientation, section, section)
return result
def setup_model_data(self, lines: list, parent: TreeItem):
parents = [parent]
indentations = [0]
for line in lines:
line = line.rstrip()
if line and "\t" in line:
position = 0
while position < len(line):
if line[position] != " ":
break
position += 1
column_data = line[position:].split("\t")
column_data = [string for string in column_data if string]
if position > indentations[-1]:
if parents[-1].child_count() > 0:
parents.append(parents[-1].last_child())
indentations.append(position)
else:
while position < indentations[-1] and parents:
parents.pop()
indentations.pop()
parent: TreeItem = parents[-1]
col_count = self.root_item.column_count()
parent.insert_children(parent.child_count(), 1, col_count)
for column in range(len(column_data)):
child = parent.last_child()
child.set_data(column, column_data[column])
def _repr_recursion(self, item: TreeItem, indent: int = 0) -> str:
result = " " * indent + repr(item) + "\n"
for child in item.child_items:
result += self._repr_recursion(child, indent + 2)
return result
def __repr__(self) -> str:
return self._repr_recursion(self.root_item)
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