如何以编程方式突出显示 QTreeView 中的选择？

Question

当我使用item_selected('Item2') 以编程方式在QTreeView 中选择一个选项时，该选项会按预期传递给处理程序。我还希望该项目具有选择突出显示，但我似乎无法弄清楚。有什么想法吗？

from PyQt5.Qt import Qt
from PyQt5.QtWidgets import QApplication, QTreeWidget, QTreeWidgetItem
import sys


def item_selected(selection):
    try:
        print(selection.text(0))
    except AttributeError:
        print(selection)


app = QApplication(sys.argv)

TreeList = ({
    'Header1': (('Item1', 'Item2', )),
    'Header2': (('Item11', 'Item21', )),
})

tree = QTreeWidget()

for key, value in TreeList.items():
    parent = QTreeWidgetItem(tree, [key])
    for val in value:
        child = QTreeWidgetItem([val])
        child.setFlags(child.flags() | Qt.ItemIsUserCheckable)
        child.setCheckState(0, Qt.Unchecked)
        parent.addChild(child)

tree.itemClicked.connect(item_selected)

tree.show()

# SELECT AND HIGHLIGHT THIS ONE
item_selected('Item2')

sys.exit(app.exec_())

如果上面的代码乱七八糟，请见谅。

Answer 1

你不能使用同一个插槽，它接收一个项目，只打印它，在你的情况下，你必须搜索项目的文本并选择它：

def item_selected(selection):
    print(selection.text(0))

app = QApplication(sys.argv)

TreeList = ({
    'Header1': (('Item1', 'Item2', )),
    'Header2': (('Item11', 'Item21', )),
})

tree = QTreeWidget()

for key, value in TreeList.items():
    parent = QTreeWidgetItem(tree, [key])
    for val in value:
        child = QTreeWidgetItem([val])
        child.setFlags(child.flags() | Qt.ItemIsUserCheckable)
        child.setCheckState(0, Qt.Unchecked)
        parent.addChild(child)

tree.itemClicked.connect(item_selected)

items = tree.findItems("Item2", Qt.MatchFixedString| Qt.MatchRecursive) 
[it.setSelected(True) for it in items]

tree.expandAll()
tree.show()

sys.exit(app.exec_())