如何在PYQT5 treewidget中按下按钮时取消选中某个项目？

我使用树构件构建树结构，默认情况下检查所有项目。有一个列表保存了一些应该取消选中的项目。我想要做的是在单击按钮时取消选中这些项目。我可以使用findItems（uncheckitems，Qt.MatchExactly | Qt.MatchRecursive，0）来查找对象。但是当我使用setCheckState（0，Qt.Unchecked）时，程序总是崩溃。如何在PYQT5 treewidget中按下按钮时取消选中某个项目？

MENUS = [ 
("Action1", [ 
    ("Action4", [ 
     ("Action8", []), ("Action9", []), ("Action10", []) 
     ]), 
    ("Action6", [ 
     ("Action11", []), ("Action12", []), ("Action13", []) 
     ]), 
    ("Action7", [ 
     ("Action14", []), ("Action15", []), ("Action16", []) 
     ]), 
    ]), 
("Action2", [ 
    ("Action17", [ 
     ("Action20", [ 
      ("Action25", []), ("Action26", []), ("Action27", []) 
      ]), 
     ("Action21", []), 
     ("Action22", []), 
     ]), 
    ("Action18", [ 
     ("Action23", [ 
      ("Action28", []), ("Action29", []), ("Action30", []) 
      ]), 
     ("Action24", []), 
     ]), 
    ("Action19", []), 
    ]), 
("Action3", [ 
    ("Action31", [ 
     ("Action34", []), ("Action35", []), ("Action36", []) 
     ]), 
    ("Action32", [ 
     ("Action37", []), ("Action38", []), ("Action39", []) 
     ]), 
    ("Action33", []), 
    ]), 
] 

uncheckedaction = ["Action3", "Action11", "Action29"] 

from uitest import Ui_MainWindow 
from PyQt5.QtWidgets import (
    QApplication, QMainWindow, QTreeWidgetItem, 
    ) 
from PyQt5.QtCore import Qt 

class window(QMainWindow): 
    def __init__(self, parent=None): 
     super(window, self).__init__(parent) 
     self.ui = Ui_MainWindow() 
     self.ui.setupUi(self) 
     self.loadMenus(MENUS) 
     self.ui.Menutree.itemChanged.connect(self.handleItemChanged) 
     self.ui.Uncheck.clicked.connect(self.uncheckprocess) 

    def uncheckprocess(self): 
     menutree = self.ui.Menutree 
     for uncheck in uncheckedaction: 
      uncheckeditem = menutree.findItems(uncheck, Qt.MatchExactly | Qt.MatchRecursive, 0) 
      print("uncheckeditem:", uncheckeditem) 
      uncheckeditem.setCheckState(0, Qt.Unchecked) 

    def loadMenus(self, menus): 
     def recurse(parent, items): 
      for text, children in items: 
       item = QTreeWidgetItem(parent) 
       item.setText(0, text) 
       item.setCheckState(0, Qt.Checked) 
       recurse(item, children) 
     recurse(self.ui.Menutree, menus) 
     self.ui.Menutree.expandAll() 

    def handleItemChanged(self, item, column): 
     def recurse(parent, state): 
      for index in range(parent.childCount()): 
       child = parent.child(index) 
       # child.setCheckState(0, state) 
       child.setDisabled(state == Qt.Unchecked) 
       recurse(child, state) 
     recurse(item, item.checkState(0)) 

if __name__ == "__main__": 

    app = QApplication(['']) 
    gui = window() 
    gui.show() 
    app.exec_()

UI：

from PyQt5 import QtCore, QtGui, QtWidgets 

class Ui_MainWindow(object): 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName("MainWindow") 
     MainWindow.resize(816, 577) 
     self.centralwidget = QtWidgets.QWidget(MainWindow) 
     self.centralwidget.setObjectName("centralwidget") 
     self.gridLayout = QtWidgets.QGridLayout(self.centralwidget) 
     self.gridLayout.setObjectName("gridLayout") 
     self.scrollArea = QtWidgets.QScrollArea(self.centralwidget) 
     self.scrollArea.setWidgetResizable(True) 
     self.scrollArea.setObjectName("scrollArea") 
     self.scrollAreaWidgetContents = QtWidgets.QWidget() 
     self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 796, 468)) 
     self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents") 
     self.verticalLayout = QtWidgets.QVBoxLayout(self.scrollAreaWidgetContents) 
     self.verticalLayout.setContentsMargins(0, 0, 0, 0) 
     self.verticalLayout.setObjectName("verticalLayout") 
     self.Menutree = QtWidgets.QTreeWidget(self.scrollAreaWidgetContents) 
     self.Menutree.setObjectName("Menutree") 
     self.Menutree.headerItem().setText(0, "1") 
     self.Menutree.header().setVisible(False) 
     self.verticalLayout.addWidget(self.Menutree) 
     spacerItem = QtWidgets.QSpacerItem(20, 10, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Minimum) 
     self.verticalLayout.addItem(spacerItem) 
     self.groupBox = QtWidgets.QGroupBox(self.scrollAreaWidgetContents) 
     self.groupBox.setTitle("") 
     self.groupBox.setObjectName("groupBox") 
     self.horizontalLayout = QtWidgets.QHBoxLayout(self.groupBox) 
     self.horizontalLayout.setObjectName("horizontalLayout") 
     spacerItem1 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum) 
     self.horizontalLayout.addItem(spacerItem1) 
     self.Previous = QtWidgets.QPushButton(self.groupBox) 
     font = QtGui.QFont() 
     font.setPointSize(14) 
     font.setBold(True) 
     font.setWeight(75) 
     self.Previous.setFont(font) 
     self.Previous.setObjectName("Previous") 
     self.horizontalLayout.addWidget(self.Previous) 
     spacerItem2 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) 
     self.horizontalLayout.addItem(spacerItem2) 
     self.Uncheck = QtWidgets.QPushButton(self.groupBox) 
     self.Uncheck.setObjectName("Uncheck") 
     self.horizontalLayout.addWidget(self.Uncheck) 
     spacerItem3 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum) 
     self.horizontalLayout.addItem(spacerItem3) 
     self.Next = QtWidgets.QPushButton(self.groupBox) 
     font = QtGui.QFont() 
     font.setPointSize(14) 
     font.setBold(True) 
     font.setWeight(75) 
     self.Next.setFont(font) 
     self.Next.setObjectName("Next") 
     self.horizontalLayout.addWidget(self.Next) 
     spacerItem4 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum) 
     self.horizontalLayout.addItem(spacerItem4) 
     self.Next_Save = QtWidgets.QPushButton(self.groupBox) 
     font = QtGui.QFont() 
     font.setPointSize(14) 
     font.setBold(True) 
     font.setWeight(75) 
     self.Next_Save.setFont(font) 
     self.Next_Save.setObjectName("Next_Save") 
     self.horizontalLayout.addWidget(self.Next_Save) 
     spacerItem5 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum) 
     self.horizontalLayout.addItem(spacerItem5) 
     self.verticalLayout.addWidget(self.groupBox) 
     self.scrollArea.setWidget(self.scrollAreaWidgetContents) 
     self.gridLayout.addWidget(self.scrollArea, 0, 0, 1, 1) 
     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtWidgets.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 816, 21)) 
     self.menubar.setObjectName("menubar") 
     MainWindow.setMenuBar(self.menubar) 
     self.statusbar = QtWidgets.QStatusBar(MainWindow) 
     self.statusbar.setObjectName("statusbar") 
     MainWindow.setStatusBar(self.statusbar) 
     self.TBlevel1 = QtWidgets.QToolBar(MainWindow) 
     sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred) 
     sizePolicy.setHorizontalStretch(0) 
     sizePolicy.setVerticalStretch(0) 
     sizePolicy.setHeightForWidth(self.TBlevel1.sizePolicy().hasHeightForWidth()) 
     self.TBlevel1.setSizePolicy(sizePolicy) 
     font = QtGui.QFont() 
     font.setPointSize(14) 
     self.TBlevel1.setFont(font) 
     self.TBlevel1.setObjectName("TBlevel1") 
     MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.TBlevel1) 
     self.TBlevel2 = QtWidgets.QToolBar(MainWindow) 
     font = QtGui.QFont() 
     font.setPointSize(12) 
     self.TBlevel2.setFont(font) 
     self.TBlevel2.setObjectName("TBlevel2") 
     MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.TBlevel2) 
     MainWindow.insertToolBarBreak(self.TBlevel2) 
     self.TBlevel3 = QtWidgets.QToolBar(MainWindow) 
     font = QtGui.QFont() 
     font.setPointSize(10) 
     self.TBlevel3.setFont(font) 
     self.TBlevel3.setObjectName("TBlevel3") 
     MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.TBlevel3) 
     MainWindow.insertToolBarBreak(self.TBlevel3) 
     self.TBlevel4 = QtWidgets.QToolBar(MainWindow) 
     self.TBlevel4.setObjectName("TBlevel4") 
     MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.TBlevel4) 
     MainWindow.insertToolBarBreak(self.TBlevel4) 

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

    def retranslateUi(self, MainWindow): 
     _translate = QtCore.QCoreApplication.translate 
     MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) 
     self.Previous.setText(_translate("MainWindow", "Previous")) 
     self.Uncheck.setText(_translate("MainWindow", "Uncheck")) 
     self.Next.setText(_translate("MainWindow", "Next")) 
     self.Next_Save.setText(_translate("MainWindow", "Next and Save")) 
     self.TBlevel1.setWindowTitle(_translate("MainWindow", "toolBar")) 
     self.TBlevel2.setWindowTitle(_translate("MainWindow", "toolBar")) 
     self.TBlevel3.setWindowTitle(_translate("MainWindow", "toolBar_2")) 
     self.TBlevel4.setWindowTitle(_translate("MainWindow", "toolBar")) 


if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    MainWindow = QtWidgets.QMainWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_())

有人能帮助我吗？非常感谢你。

来源

2017-03-14 Zhentao

您正在寻找的对象的列表，而不是一个单一的对象：

def uncheckprocess(self): 
    menutree = self.ui.Menutree 
    for uncheck in uncheckedaction: 
     uncheckeditems = menutree.findItems(uncheck, Qt.MatchExactly | Qt.MatchRecursive, 0) 
     for uncheckeditem in uncheckeditems: 
      uncheckeditem.setCheckState(0, Qt.Unchecked)

来源

2017-03-14 09:07:07 suiwenfeng

太谢谢你了。有用！ – Zhentao

如何在PYQT5 treewidget中按下按钮时取消选中某个项目？

回答

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