如果未选中项目，如何从Qlistidget的QPlaintextEdit中删除确切的文本？

问题描述

我想在取消选中项目时从Qlistwidget的QPlaintextEdit中删除完全匹配的文本。 它不仅删除了项目，还删除了其他匹配的文本。例如：“ Fname1 Lname1” “ Fname2 Lname2”，“ Fname3 LName3”，“ Fname”，“ Lname1。我选择了所有项目，并且要移动未选中项目“ Fname”的项目。它删除了单独的“ Fname”，也删除了“ Fname1 Lname1”，并将输出显示为“ 1 Lname1”。我只想删除确切的项目（文本）。怎么办？ 下面是我的示例代码：

from PyQt5 import QtCore,QtGui,QtWidgets


class Ui_Form(object):
    def setupUi(self,Form):
        Form.setobjectName("Form")
        Form.resize(691,327)
        self.listWidget = QtWidgets.QListWidget(Form)
        self.listWidget.setGeometry(QtCore.QRect(70,40,256,192))
        self.listWidget.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
        self.listWidget.setobjectName("listWidget")
        self.plainTextEdit = QtWidgets.QPlainTextEdit(Form)
        self.plainTextEdit.setGeometry(QtCore.QRect(360,261,191))
        self.plainTextEdit.setTabChangesFocus(True)
        self.plainTextEdit.setReadOnly(True)
        self.plainTextEdit.setobjectName("plainTextEdit")

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)
          
    def retranslateUi(self,Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setwindowTitle(_translate("Form","Form"))


class MainWindow(QtWidgets.QWidget,Ui_Form):                             
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        
        self.lists = {
            "Fname1 Lname1": 0,"Fname2 Lname2": 0,"Fname3 LName3": 0,"Fname":0,"lname1":0
        }  

        for i in self.lists.keys():                                   
            item = QtWidgets.QListWidgetItem(i)
            item.setFlags(item.flags() | QtCore.Qt.ItemIsUserCheckable)
            item.setCheckState(QtCore.Qt.Unchecked)
            self.listWidget.addItem(item)
           


    def on_listWidget_itemClicked(self,item):    

        if item.checkState() == QtCore.Qt.Checked and self.lists[item.text()] == 0:
            self.plainTextEdit.appendplainText(item.text())
            self.lists[item.text()] = 1                                  
        elif item.checkState() == QtCore.Qt.Unchecked:
            text = self.plainTextEdit.toPlainText()
            text = text.replace(item.text(),'')
         
            _list = text.split('\n')                                   
            _list = [ i for i in _list if i ]                           
            text = '\n'.join(_list)              
            self.plainTextEdit.setPlainText(text)   
            self.lists[item.text()] = 0     


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Form = MainWindow() 
    Form.show()
    sys.exit(app.exec_())

解决方法

尝试一下：

from PyQt5 import QtCore,QtGui,QtWidgets


class Ui_Form(object):
    def setupUi(self,Form):
        Form.setObjectName("Form")
        Form.resize(691,327)
        self.listWidget = QtWidgets.QListWidget(Form)
        self.listWidget.setGeometry(QtCore.QRect(70,40,256,192))
        self.listWidget.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
        self.listWidget.setObjectName("listWidget")
        self.plainTextEdit = QtWidgets.QPlainTextEdit(Form)
        self.plainTextEdit.setGeometry(QtCore.QRect(360,261,191))
        self.plainTextEdit.setTabChangesFocus(True)
        self.plainTextEdit.setReadOnly(True)
        self.plainTextEdit.setObjectName("plainTextEdit")

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)
          
    def retranslateUi(self,Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form","Form"))


class MainWindow(QtWidgets.QWidget,Ui_Form):                             
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        
        self.lists = {
            "Fname1 Lname1": 0,"Fname2 Lname2": 0,"Fname3 LName3": 0,"Fname":0,"lname1":0
        }  

        for i in self.lists.keys():                                   
            item = QtWidgets.QListWidgetItem(i)
            item.setFlags(item.flags() | QtCore.Qt.ItemIsUserCheckable)
            item.setCheckState(QtCore.Qt.Unchecked)
            self.listWidget.addItem(item)

    def on_listWidget_itemClicked(self,item):    

        if item.checkState() == QtCore.Qt.Checked and self.lists[item.text()] == 0:
            self.plainTextEdit.appendPlainText(item.text())
            self.lists[item.text()] = 1                                  
        elif item.checkState() == QtCore.Qt.Unchecked:
            text = self.plainTextEdit.toPlainText()
            
#            text = text.replace(item.text(),'')                         # ---
          
            _list = text.split('\n')                                   
#            _list = [ i for i in _list if i ]                            # --- 
            _list = [ i for i in _list if i != item.text() ]              # +++  

            
            text = '\n'.join(_list)              
            self.plainTextEdit.setPlainText(text)   
            self.lists[item.text()] = 0     


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Form = MainWindow() 
    Form.show()
    sys.exit(app.exec_())