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| # The QTreeWidget class provides a standard tree widget.
import sys
from PySide6.QtWidgets import (QApplication,
QWidget, QVBoxLayout, QTreeWidget,
QTreeWidgetItem, QLabel)
class Window(QWidget):
def __init__(self):
super().__init__()
layout = QVBoxLayout()
self.setLayout(layout)
# 1 - Create the tree widget
self.tree_widget = QTreeWidget()
# 2 - Create the tree widget items and add them
# to the tree widget
#
# QTreeWidgetItem.ItemType.Type value is 0
# You can use 0 instead of the enum value
# but there's no guarantee it will stay 0 in the future.
#
# apes parent is self.tree_widget which means
# apes is the root item
#
# ['Apes'] is the item text. It's a list with one element.
# That's because a tree widget has one column by default.
apes = QTreeWidgetItem(self.tree_widget, ['Apes'],
QTreeWidgetItem.ItemType.Type)
# Add other items to the tree. The pattern is the same
# as for the root item: (parent, text, type)
# There are several other QTreeWidgetItem
# constructors as well.
gibbons = QTreeWidgetItem(apes, ['Gibbons'], 0)
hominidae = QTreeWidgetItem(apes, ['Hominidae'], 0)
ponginae = QTreeWidgetItem(hominidae, ['Orangutans'], 0)
homininae = QTreeWidgetItem(hominidae, ['Homininae'], 0)
gorillinae = QTreeWidgetItem(homininae, ['Gorillas'], 0)
hominini = QTreeWidgetItem(homininae, ['Hominini'], 0)
panina = QTreeWidgetItem(hominini, ['Chimpanzees'], 0)
hominina = QTreeWidgetItem(hominini, ['Hominina'], 0)
# Add some event handling just for show.
self.tree_widget.currentItemChanged.connect(
self.on_current_item_changed)
self.label = QLabel()
# 3 - Add the tree widget to the layout
layout.addWidget(self.tree_widget)
layout.addWidget(self.label)
# The label will display currently selected item text.
def on_current_item_changed(self, current, previous):
self.label.setText(current.text(0))
if __name__ == '__main__':
if not QApplication.instance():
app = QApplication(sys.argv)
else:
app = QApplication.instance()
main_window = Window()
main_window.show()
sys.exit(app.exec())
|