PyQt4 Combobox Not Updating After Initial Selection

Question

Combobox dbSelection does not update to apply in code when selecting table names from sqlite to display in combobox tabSelection.

It also takes a significant number of seconds to load the directory dialog window once the button is clicked.

I would also like to ensure that all tables within a database are listed in the tabSelection combobox.

The code is as follows and is associated with a Qt Designer file:

from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys
import qcDbWidget2
import os
import sqlite3

class MainDialog(QWidget, qcDbWidget2.Ui_qcQueryWidget):
    def __init__(self, parent=None):
        super(MainDialog, self).__init__(parent)
        self.setupUi(self)
        self.connect(self.dbDirSelect, SIGNAL("clicked()"), self.getDirName)

    def getDirName(self):
        existDir = QFileDialog.getExistingDirectory(self)
        dbDir = str(existDir)
        self.dbDirDisplay.setText(dbDir)

        dbFileList = []
        for root, dirs, files in os.walk(dbDir):
            for file in files:
                if file.endswith('.db'):
                    dbFileList.append(file)

        self.dbSelection.addItems(dbFileList)

        tableList = []
        self.dbSelection.update()

        dbName = str(self.dbSelection.currentText())
        dbPath = str(dbDir + '\\' + dbName)
        conn = sqlite3.connect(dbPath)
        c = conn.cursor()

        res = c.execute("SELECT name FROM sqlite_master WHERE type='table';")
        self.tabSelection.clear()
        for name in res:
            tableList.append(name[0])
            print(name[0])
        for name in tableList:
           self.tabSelection.addItems(tableList)

app = QApplication(sys.argv)
form = MainDialog()
form.show()
app.exec_()

Answer 1

Have you considered to use QTableView instead of QTableList ?
Qt uses MVC which methods are way faster than doing it by hand.

In this case, it's pretty simple.
You create a model:

my_model =  QStringListModel()

You can then save data to my_model :

my_list = ["toto", "tutu", "tata"]
my_model.setStringList(my_list)

Once you have a QTableView , you use it's method setModel() to provide the model.

my_table_view.setModel(my_model)