第二十五篇 -- QTreeWidget右击菜单的实现

效果图：

自己画一个ui，如图，前面已经讲过怎么用Qt Designer画图了，现在就不赘述了。

ui_play.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'ui_play2.ui'
#
# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(422, 375)
        self.treeWidget = QtWidgets.QTreeWidget(Form)
        self.treeWidget.setGeometry(QtCore.QRect(10, 10, 401, 351))
        self.treeWidget.setObjectName("treeWidget")
        self.treeWidget.headerItem().setTextAlignment(0, QtCore.Qt.AlignCenter)
        font = QtGui.QFont()
        font.setPointSize(14)
        font.setBold(True)
        font.setWeight(75)
        self.treeWidget.headerItem().setFont(0, font)
        self.treeWidget.headerItem().setBackground(0, QtGui.QColor(170, 255, 0))
        brush = QtGui.QBrush(QtGui.QColor(170, 85, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        self.treeWidget.headerItem().setForeground(0, brush)
        self.treeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignCenter)
        font = QtGui.QFont()
        font.setPointSize(14)
        font.setBold(True)
        font.setWeight(75)
        self.treeWidget.headerItem().setFont(1, font)
        self.treeWidget.headerItem().setBackground(1, QtGui.QColor(170, 255, 127))
        brush = QtGui.QBrush(QtGui.QColor(170, 85, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        self.treeWidget.headerItem().setForeground(1, brush)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(0, brush)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(1, brush)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(0, brush)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(1, brush)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(0, brush)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(1, brush)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(0, brush)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(1, brush)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(0, brush)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(1, brush)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(0, brush)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(1, brush)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(0, brush)
        brush = QtGui.QBrush(QtGui.QColor(85, 255, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        item_0.setBackground(1, brush)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Form"))
        self.treeWidget.headerItem().setText(0, _translate("Form", "姓名"))
        self.treeWidget.headerItem().setText(1, _translate("Form", "信息"))
        __sortingEnabled = self.treeWidget.isSortingEnabled()
        self.treeWidget.setSortingEnabled(False)
        self.treeWidget.topLevelItem(0).setText(0, _translate("Form", "张三"))
        self.treeWidget.topLevelItem(0).child(0).setText(0, _translate("Form", "性别"))
        self.treeWidget.topLevelItem(0).child(0).setText(1, _translate("Form", "男"))
        self.treeWidget.topLevelItem(0).child(1).setText(0, _translate("Form", "年龄"))
        self.treeWidget.topLevelItem(0).child(1).setText(1, _translate("Form", "18"))
        self.treeWidget.topLevelItem(0).child(2).setText(0, _translate("Form", "爱好"))
        self.treeWidget.topLevelItem(0).child(2).setText(1, _translate("Form", "LOL"))
        self.treeWidget.topLevelItem(1).setText(0, _translate("Form", "李四"))
        self.treeWidget.topLevelItem(1).child(0).setText(0, _translate("Form", "性别"))
        self.treeWidget.topLevelItem(1).child(0).setText(1, _translate("Form", "男"))
        self.treeWidget.topLevelItem(1).child(1).setText(0, _translate("Form", "年龄"))
        self.treeWidget.topLevelItem(1).child(1).setText(1, _translate("Form", "20"))
        self.treeWidget.topLevelItem(1).child(2).setText(0, _translate("Form", "爱好"))
        self.treeWidget.topLevelItem(1).child(2).setText(1, _translate("Form", "DOTA"))
        self.treeWidget.topLevelItem(2).setText(0, _translate("Form", "王五"))
        self.treeWidget.topLevelItem(2).child(0).setText(0, _translate("Form", "性别"))
        self.treeWidget.topLevelItem(2).child(0).setText(1, _translate("Form", "男"))
        self.treeWidget.topLevelItem(2).child(1).setText(0, _translate("Form", "年龄"))
        self.treeWidget.topLevelItem(2).child(1).setText(1, _translate("Form", "22"))
        self.treeWidget.topLevelItem(2).child(2).setText(0, _translate("Form", "爱好"))
        self.treeWidget.topLevelItem(2).child(2).setText(1, _translate("Form", "麻将"))
        self.treeWidget.topLevelItem(3).setText(0, _translate("Form", "芳芳"))
        self.treeWidget.topLevelItem(3).child(0).setText(0, _translate("Form", "性别"))
        self.treeWidget.topLevelItem(3).child(0).setText(1, _translate("Form", "女"))
        self.treeWidget.topLevelItem(3).child(1).setText(0, _translate("Form", "年龄"))
        self.treeWidget.topLevelItem(3).child(1).setText(1, _translate("Form", "20"))
        self.treeWidget.topLevelItem(3).child(2).setText(0, _translate("Form", "爱好"))
        self.treeWidget.topLevelItem(3).child(2).setText(1, _translate("Form", "看书"))
        self.treeWidget.topLevelItem(4).setText(0, _translate("Form", "小智"))
        self.treeWidget.topLevelItem(4).child(0).setText(0, _translate("Form", "性别"))
        self.treeWidget.topLevelItem(4).child(0).setText(1, _translate("Form", "男"))
        self.treeWidget.topLevelItem(4).child(1).setText(0, _translate("Form", "年龄"))
        self.treeWidget.topLevelItem(4).child(1).setText(1, _translate("Form", "25"))
        self.treeWidget.topLevelItem(4).child(2).setText(0, _translate("Form", "爱好"))
        self.treeWidget.topLevelItem(4).child(2).setText(1, _translate("Form", "解说"))
        self.treeWidget.topLevelItem(5).setText(0, _translate("Form", "婷婷"))
        self.treeWidget.topLevelItem(5).child(0).setText(0, _translate("Form", "性别"))
        self.treeWidget.topLevelItem(5).child(0).setText(1, _translate("Form", "女"))
        self.treeWidget.topLevelItem(5).child(1).setText(0, _translate("Form", "年龄"))
        self.treeWidget.topLevelItem(5).child(1).setText(1, _translate("Form", "27"))
        self.treeWidget.topLevelItem(5).child(2).setText(0, _translate("Form", "爱好"))
        self.treeWidget.topLevelItem(5).child(2).setText(1, _translate("Form", "健身"))
        self.treeWidget.topLevelItem(6).setText(0, _translate("Form", "大熊"))
        self.treeWidget.topLevelItem(6).child(0).setText(0, _translate("Form", "性别"))
        self.treeWidget.topLevelItem(6).child(0).setText(1, _translate("Form", "男"))
        self.treeWidget.topLevelItem(6).child(1).setText(0, _translate("Form", "年龄"))
        self.treeWidget.topLevelItem(6).child(1).setText(1, _translate("Form", "14"))
        self.treeWidget.topLevelItem(6).child(2).setText(0, _translate("Form", "爱好"))
        self.treeWidget.topLevelItem(6).child(2).setText(1, _translate("Form", "睡觉"))
        self.treeWidget.setSortingEnabled(__sortingEnabled)

play_py

#!/usr/bin/env python
# _*_ coding: UTF-8 _*_
"""=================================================
@Project -> File    : FDS -> play2.py
@IDE     : PyCharm
@Author  : zihan
@Date    : 2020/5/13 10:41
@Desc    :
================================================="""

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QMenu, QMessageBox
from PyQt5.QtCore import Qt
from ui_play2 import Ui_Form


class QmyWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)  # 调用父类构造函数
        self.ui = Ui_Form()  # 创建UI对象
        self.ui.setupUi(self)  # 构造UI

        self.ui.treeWidget.expandAll()
        self.ui.treeWidget.setColumnWidth(0, 200)
        self.ui.treeWidget.setStyleSheet("QHeaderView::section{background:rgb(85, 170, 127);}")

        self.ui.treeWidget.setContextMenuPolicy(Qt.CustomContextMenu)
        self.ui.treeWidget.customContextMenuRequested.connect(self.do_custom_context_menu_request)

    def do_custom_context_menu_request(self, pos):
        # row_num = -1  # 当前节点的行号
        parent_num = -1  # 存放当前行的父节点的行号
        for i in self.ui.treeWidget.selectionModel().selection().indexes():
            # row_num = i.row()
            parent_num = i.parent().row()
        # print(parent_num)
        # print(row_num)
        if parent_num == -1:
            pass
        else:
            menu = QMenu()
            item1 = menu.addAction(u"选项一")
            item2 = menu.addAction(u"选项二")
            item3 = menu.addAction(u"选项三")
            action = menu.exec_(self.ui.treeWidget.mapToGlobal(pos))
            if action == item1:
                QMessageBox.information(self, "消息框标题", "你选择了：选项一", QMessageBox.Yes | QMessageBox.No)
                print("you select 1")
            elif action == item2:
                QMessageBox.information(self, "消息框标题", "你选择了：选项二", QMessageBox.Yes | QMessageBox.No)
                print("you select 2")
            elif action == item3:
                QMessageBox.information(self, "消息框标题", "你选择了：选项三", QMessageBox.Yes | QMessageBox.No)
                print("you select 3")
            else:
                return


if __name__ == '__main__':
    app = QApplication(sys.argv)  # 创建app
    form = QmyWidget()
    form.show()
    sys.exit(app.exec_())

这就可以实现右击菜单了。关键是有两句话

self.ui.treeWidget.setContextMenuPolicy(Qt.CustomContextMenu)  # 允许右击菜单
self.ui.treeWidget.customContextMenuRequested.connect(self.do_custom_context_menu_request)  # 右击时触发函数

这是关键。