Qt.CheckStateRole not work in Pyside 6.3.1

alonginhh

Hi everyone,

I upgraded the Pyside6 from 6.2.3 to 6.3.1, but I found the Qt.CheckStateRole didn't show correctly in QTreeWidgetItem。The check icon didn't show .

self.setData(0, Qt.CheckStateRole, Qt.Checked)

PySide6.3.1

PySide6.2.3

Could someone help this? THANK YOU!

JonB

@alonginhh
Not sure, but I think the bug report suggests converting Qt.Checked/Unchecked to int() to make it work for now?

SGaist

Hi and welcome to devnet,

Which platform are you running this on ?
How did you install it ?

Can you provide a minimal runnable script that shows this behaviour ?

CristianMaureira

Might be related to https://bugreports.qt.io/browse/PYSIDE-1930, there are many other issues duplicating the same wrong behavior. Will be fixed in 6.3.2

alonginhh

Thanks for the replies.

Here is my code.

import sys

from PySide6.QtCore import Qt
from PySide6.QtWidgets import (
    QAbstractItemView,
    QApplication,
    QHeaderView,
    QLabel,
    QMainWindow,
    QTreeWidget,
    QTreeWidgetItem,
    QVBoxLayout,
    QWidget,
)


class MyTreeItem(QTreeWidgetItem):
    def __init__(self, title):
        super().__init__()
        self.title = title
        self.setText(0, self.title)
        self.setData(0, Qt.CheckStateRole, Qt.Unchecked)
    def setChecked(self, checked):
        """Set the check state of the item."""
        self.setData(
            0,
            Qt.CheckStateRole,
            Qt.Checked if checked else Qt.Unchecked,
        )


class MyTreeWidget(QTreeWidget):
    def __init__(self, contents, parent=None):
        super().__init__(parent)
        self.setAllColumnsShowFocus(True)
        self.setDragDropMode(QAbstractItemView.NoDragDrop)
        self.setSelectionMode(QAbstractItemView.MultiSelection)
        self.setStyleSheet("QTreeView::item{margin-top:1px;margin-bottom:1px;}")
        self.setColumnCount(1)
        self.setHeaderLabels(["Title"])

        # add item to the tree
        my_items = []
        for content in contents:
            my_items.append(MyTreeItem(content))
        self.addTopLevelItems(my_items)
    def selectionChanged(self, selected, deselected):
        """Selection changed."""
        super().selectionChanged(selected, deselected)
        self.blockSignals(True)
        for index in selected.indexes():
            item = self.itemFromIndex(index)
            # did not work at PySide6.3.1
            item.setChecked(True)
            # item.setData(0, Qt.CheckStateRole, Qt.Checked)
        for index in deselected.indexes():
            item = self.itemFromIndex(index)
            # did not work at PySide6.3.1
            item.setChecked(False)
            # item.setData(0, Qt.CheckStateRole, Qt.Unchecked)
        self.blockSignals(False)


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('TREEWIDGET_DEMO')

        # self.setMinimumSize(400, 460)
        main_layout = QVBoxLayout()

        label = QLabel("Demo")
        label.setAlignment(Qt.AlignCenter)
        main_layout.addWidget(label)

        data = [
            "Demo 01",
            "Demo 02",
            "Demo 03",
            "Demo 04",
            "Demo 05",
            "Demo 06",
        ]
        self.my_list_tree = MyTreeWidget(data)
        self.my_list_tree.setFixedHeight(200)
        main_layout.addWidget(self.my_list_tree, 1)

        widget = QWidget()
        widget.setLayout(main_layout)
        self.setCentralWidget(widget)


app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec()

The selectionChanged method has different behavior between PySide6.2.3 and 6.3.1.

JonB

@alonginhh
Not sure, but I think the bug report suggests converting Qt.Checked/Unchecked to int() to make it work for now?

alonginhh

@JonB Yes, you are right. converting Qt.Checked/Unchecked to int() to make it work in PySide6.3.1. Thank you @SGaist @CristianMaureira @JonB !! Problem solved.