pyqt5双击treeview节点之后,完成编辑,获取完成编辑得信号完整demo

PyQt5中的QTreeView通常用于显示数据树形结构，如果你想要在用户双击节点后触发编辑，然后在编辑完成后接收信号，你可以使用`QStandardItemModel`、`QTreeWidget`以及相关的槽函数。以下是一个简单的示例：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QTreeView, QStandardItemModel, QLineEdit, QVBoxLayout

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        # 创建模型
        self.model = QStandardItemModel()
        self.model.setHorizontalHeaderLabels(['Name', 'Value'])

        # 添加一些初始数据
        item_1 = QStandardItem('Item 1')
        item_1.setEditable(True)
        item_2 = QStandardItem('Item 2')
        item_2.setEditable(True)

        item_1.child(0) = QStandardItem('Child 1')
        item_2.child(0) = QStandardItem('Child 2')

        self.model.appendRow([item_1, QLineEdit()])
        self.model.appendRow([item_2, QLineEdit()])

        # 设置QTreeView
        self.tree_view = QTreeView()
        self.tree_view.setModel(self.model)
        self.tree_view.doubleClicked.connect(self.edit_item)

        layout = QVBoxLayout()
        layout.addWidget(self.tree_view)
        widget = QWidget()
        widget.setLayout(layout)
        self.setCentralWidget(widget)

    def edit_item(self, index):
        item = index.internalPointer()
        if isinstance(item, QStandardItem):
            if not item.isEditable():
                return
            line_edit = QLineEdit()
            line_edit.setText(item.text())
            line_edit.editingFinished.connect(self.on_text_changed(line_edit))
            item.setData(line_edit)
            item.setEditable(False)
            line_edit.show()

    def on_text_changed(self, line_edit):
        text = line_edit.text()
        current_index = line_edit.parent().indexFromItem(line_edit.parent())
        self.model.setData(current_index, text)
        line_edit.close()
        item = current_index.internalPointer()
        item.setEditable(True)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_win = MainWindow()
    main_win.show()
    sys.exit(app.exec_())