pyside6设置QTreeWidget背景色和QTreeWidgetItem复选框显示冲突

Question

一个简单的QTreeWidget，其中QTreeWidgetItem启用了复选框item1.setFlags(item1.flags() | Qt.ItemIsUserCheckable)，当我用qss设置QTreeWidget的背景色background-color:;时，勾选item则消失，取消勾选又出现了。这怎么解决？

from PySide6.QtWidgets import QApplication, QTreeWidget, QTreeWidgetItem
from PySide6.QtCore import Qt
import sys

app = QApplication(sys.argv)

tree = QTreeWidget()
tree.setHeaderLabels(['Items'])

tree.setStyleSheet("""QTreeWidget{
                        border: none;
                        outline: 0px;
                        padding: 10px;
                        margin: 0px;
                        background-color: #f0f0f0;
                    }""")

# 添加带复选框的项目
item1 = QTreeWidgetItem(tree, ['Item 1'])
item1.setFlags(item1.flags() | Qt.ItemIsUserCheckable)
item1.setCheckState(0, Qt.Checked)

item2 = QTreeWidgetItem(tree, ['Item 2'])
item2.setFlags(item2.flags() | Qt.ItemIsUserCheckable)
item2.setCheckState(0, Qt.Unchecked)

tree.show()
sys.exit(app.exec())

Answer 1

已经通过Gemini解决 ，

QTreeView::indicator {
    background-color: white;
    border: 1px solid #cccccc;
}
 
 
QTreeView::indicator:checked {
    background-color: #0078d7;
    border: 1px solid #005a9e;
}
QTreeView::indicator:unchecked {
    background-color: #0078d7;
    border: 1px solid #005a9e;
}
```python

```