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| import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QTreeView, QFileSystemModel
from PyQt5.QtCore import QModelIndex, QAbstractItemModel, QVariant, Qt
class MyTreeView(QTreeView):
pass
class TreeItem:
def __init__(self, parent=None, text=''):
self.parent = parent
self.text = text
self.children = []
###########
def __repr__(self):
return '<TreeItem(%s, %s)>' % (self.parent, self.text)
###########
@property
def children_count(self):
return len(self.children)
def append_children(self, item):
self.children.append(item)
class MyTreeModel(QAbstractItemModel):
_column_labels = ('')
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self._root = TreeItem(text="Root")
##############
root_item = self._root
for word in ('alpha', 'beta', 'gamma', 'epsilon', 'omega', 'delta', 'zet'):
item = TreeItem(root_item, word)
#print('treeitem:', item)
root_item.append_children(item)
root_item = item
##############
def flags(self, index):
return Qt.ItemIsEnabled
def headerData(self, section, orientation, role):
if role == Qt.DisplayRole and orientation == Qt.Horizontal:
return self._column_labels[section]
else:
return QVariant()
def rowCount(self, parent):
print()
print('=== rowCount ===')
print('parent row:', parent.row(), 'col:', parent.column())
print('valid:', parent.isValid())
if not parent.isValid():
parent_item = self._root
else:
parent_item = parent.internalPointer()
children_count = parent_item.children_count
print('rows: %s' % children_count)
return children_count
def columnCount(self, parent):
return len(self._column_labels)
def index(self, row, column, parent):
print('')
print('=== index ===')
print('row:%s col:%s parent:%s' % (row, column, parent))
if not self.hasIndex(row, column, parent):
return QModelIndex()
if not parent.isValid():
parent_item = self._root
else:
parent_item = parent.internalPointer()
try:
child_item = parent_item.children[row]
print('index created')
return self.createIndex(row, column, child_item)
except IndexError:
return QModelIndex()
def parent(self, index):
print('')
print('=== index ===')
node = index.internalPointer()
if node is None:
return QModelIndex()
parent = node.parent
if parent is None:
return QModelIndex()
grandparent = parent.parent
if grandparent is None:
return QModelIndex()
row = grandparent.child.index(parent)
return self.createIndex(row, 0, parent)
def data(self, index, role):
print()
print('=== data ===')
print('row:', index.row(), 'col:', index.column())
if not index.isValid():
return QVariant()
if role == Qt.DisplayRole:
print('display data')
if index.column() == 0:
#return QVariant(index.internalPointer().text)
return '123'
else:
return QVariant()
else:
return QVariant()
app = QApplication(sys.argv)
#wnd = QWidget()
wnd = QMainWindow()
wnd.resize(500, 500)
wnd.move(300, 100)
wnd.show()
#tree_model = QFileSystemModel()
#tree_model.setRootPath('/')
tree_model = MyTreeModel()
tree_view = MyTreeView()
tree_view.setModel(tree_model)
wnd.setCentralWidget(tree_view)
sys.exit(app.exec_()) |
(
