Pyqt - How to change combobox data because of another combobox data?

Question

I have a table, with 4 columns. Two of this 4 columns are about features. One is Feature, another is subfeature. in each column, there are comboboxes for all cells. I can open txt in these cells. I want to: when I choose cinema for feature, I want to see only name of films in subfeature comboboxes and no every subfeature that I have in my "data"... and when I choose Food in feature, I want to see only types of food in my subfeature comboboxes... .. I dont know how to do it... there is a way to do it? Here there is my def to put combobox in table and open the text file into these comboboxes: ``` 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("
","")) combobox.addItems(sorted(lista)) return combobox elif in…

Accepted Answer

You'll be using the currentIndexChanged signal, something like this:

```
#!/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_())
```

Pyqt - How to change combobox data because of another combobox data?

Solution

Problem