python之Pyqt之如何因另一个组合框数据而更改组合框数据

我有一个表，有 4 列。 这 4 列中有两列是关于功能的。一个是特征，另一个是子特征。 在每一列中，所有单元格都有组合框。 我可以在这些单元格中打开 txt。 我想:当我选择电影作为特色时，我只想看到子特征组合框中的电影名称，而不是我的“数据”中的每个子特征......当我选择特色食物时，我只想看到我的子功能组合框中的食物类型...

.. 我不知道该怎么做...有办法吗？

这里有我的 def 将组合框放入表中并将文本文件打开到这些组合框中:

def createEd(self, parent, option, index): 
    if index.column() == POLARITY:  
        combobox = QComboBox(parent) 
        combobox.addItems(sorted(index.model().TPolarities)) 
        combobox.setEditable(True) 
        arquivo = codecs.open("ln2.txt",encoding='utf-8',mode="r")    
        conTWordsdo = arquivo.readlines() 
        lista =[]         
        for i in conTWordsdo: 
            lista.append(i.replace("\n","")) 
        combobox.addItems(sorted(lista)) 
        return combobox             
    elif index.column() == FEATURE:  
        combobox = QComboBox(parent) 
        combobox.addItems(sorted(index.model().TFeatures)) 
        combobox.setEditable(True) 
        arquivo = codecs.open("ln1.txt",encoding='utf-8',mode="r")   
        conTWordsdo = arquivo.readlines() 
        lista = []             
        for i in conTWordsdo: 
            lista.append(i.replace("\n","")) 
        combobox.addItems(sorted(lista)) 
        return combobox 
 
    elif index.column() == SUBFEATURE:  
        combobox = QComboBox(parent) 
        combobox.addItems(sorted(index.model().TSubFeatures)) 
        combobox.setEditable(True) 
        arquivo = codecs.open("ln3.txt",encoding='utf-8',mode="r")   
        conTWordsdo = arquivo.readlines() 
        lista = []             
        for i in conTWordsdo: 
            lista.append(i.replace("\n","")) 
        combobox.addItems(sorted(lista)) 
        return combobox              
 
    elif index.column() == SENTENCE: 
        editor = QLineEdit(parent) 
        self.connect(editor, SIGNAL("returnPressed()"), self.commitAndCloseEditor) 
        return editor 
    else: 
        return QItemDelegate.createEditor(self, parent, option, index) 

请您参考如下方法:

您将使用 currentIndexChanged信号，像这样:

#!/usr/bin/env python 
#-*- coding:utf-8 -*- 
 
from PyQt4 import QtGui, QtCore 
 
class MyWindow(QtGui.QWidget): 
    def __init__(self, parent=None): 
        super(MyWindow, self).__init__(parent) 
 
        self.items = dict(zip( 
            [   "Parent {0}".format(x) 
                for x in range(3) 
                ], 
            [    
                [ "Child {0} - {1}".format(x, y) 
                    for y in range(3) 
                    ] 
                for x in range(3) 
                ] 
        )) 
 
        self.comboBoxChild = QtGui.QComboBox(self) 
 
        self.comboBoxParent = QtGui.QComboBox(self) 
        self.comboBoxParent.addItems(self.items.keys()) 
        self.comboBoxParent.currentIndexChanged[str].connect(self.on_comboBoxParent_currentIndexChanged) 
        self.comboBoxParent.setCurrentIndex(1) 
 
        self.layoutVertical = QtGui.QVBoxLayout(self) 
        self.layoutVertical.addWidget(self.comboBoxParent) 
        self.layoutVertical.addWidget(self.comboBoxChild) 
 
    @QtCore.pyqtSlot(str) 
    def on_comboBoxParent_currentIndexChanged(self, index): 
        items = self.items[str(index)] 
 
        self.comboBoxChild.clear() 
        self.comboBoxChild.addItems(items) 
 
if __name__ == "__main__": 
    import sys 
 
    app = QtGui.QApplication(sys.argv) 
    app.setApplicationName('MyWindow') 
 
    main = MyWindow() 
    main.show() 
    main.resize(222, 111) 
 
    sys.exit(app.exec_())