将项目从 QTreeWidget 移动到 QListWidget

Posted 2023-02-18

【中文标题】将项目从 QTreeWidget 移动到 QListWidget

【英文标题】：Moving items from QTreeWidget to QListWidget

【发布时间】：2021-09-12 11:48:41

【问题描述】：

当用户按下“确定”按钮时，我试图将选中的项目移动到空列表中。 但我得到这个错误：

 Traceback (most recent call last):   File "Desktop/abstract.py", line 42, in okButtonSlot
    self.listWidget.addItem(item) TypeError: arguments did not match any overloaded call:   addItem(self, QListWidgetItem): argument 1 has unexpected type 'QTreeWidgetItem'   addItem(self, str): argument 1 has unexpected type 'QTreeWidgetItem'

程序如下所示：

这是代码：

import sys
from PyQt5 import QtWidgets, QtCore
from PyQt5.QtWidgets import QHBoxLayout, QListWidget, QPushButton, 
QTreeWidgetItem, QWidget, QTreeWidget

parameterList = ["Suction", "Discharge", "Oil", "Motor", "Capacity"]

class TreeTilList(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        layout = QHBoxLayout()
        self.treeWidget = QTreeWidget()
        self.treeWidget.setHeaderLabel("Parameter")
        self.listWidget = QListWidget()
        self.okButton = QPushButton("Ok")

        self.okButton.clicked.connect(self.okButtonSlot)

        self.parameter = QTreeWidgetItem(self.treeWidget, ["Control values"])
        self.items = list()

        for i in parameterList:
            item = QTreeWidgetItem(self.parameter, [i])
            item.setFlags(QtCore.Qt.ItemIsUserCheckable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable)
            item.setCheckState(0, QtCore.Qt.Unchecked)
            self.items.append(item)

        layout.addWidget(self.treeWidget)
        layout.addWidget(self.listWidget)
        layout.addWidget(self.okButton)
        self.setLayout(layout)

    def okButtonSlot(self):
        for item in self.items:
            if item.checkState(0) == QtCore.Qt.Checked:
                self.listWidget.addItem(item)

            else:
                print(item.checkState(0))


def window():
    app = QtWidgets.QApplication(sys.argv)
    win = TreeTilList()
    win.show()
    sys.exit(app.exec())

window()

【问题讨论】：

当我这样做时：self.listWidget.addItem(str(item)，它会将项目添加到列表中，但项目的对象地址而不是它们的值

【参考方案1】：

报错说明QTreeWidgetItem和QListWidgetItem不一样，所以必须从第一个获取信息，复制到第二个：

def okButtonSlot(self):
    for item in self.items:
        if item.checkState(0) == QtCore.Qt.Checked:
            list_item = QListWidgetItem(item.text(0))
            self.listWidget.addItem(list_item)