组合框在PyQt中的存储值

Question

我正在制作一个简单的图形界面。我有两个名为calling_directory和receiving_directory的表。我使用组合框显示值。现在我想知道，我选择了哪个值，并希望将该值存储在变量中。我怎么做？其次，我想使用一个重置按钮，它将组合框的值设置为默认值。我怎么做？

import re 
import serial 
import sqlite3 
import os 
import csv 
import time 
from subprocess import * 
import serial.tools.list_ports 
import sys 
from PyQt4 import QtGui, QtCore 
from PyQt4.QtGui import * 
from PyQt4.QtCore import * 
import threading 

global data 
con_ports=[] 
ports=[] 
dial_ports=[] 
receiving_ports=[] 

class Example(QtGui.QWidget): 

    def __init__(self): 
     super(Example, self).__init__() 
     self.initUI() 

    def initUI(self): 
     btn1 = QtGui.QPushButton('Proceed', self) 
     btn1.resize(btn1.sizeHint()) 
     btn1.move(460, 220) 
     btn2 = QtGui.QPushButton('Reset',self) 
     btn2.resize(btn2.sizeHint()) 
     btn2.move(5, 220) 
     self.setGeometry(300,300,550,250) 
     self.setWindowTitle('Calling Functions') 
     self.setWindowIcon(QtGui.QIcon('images.jpg')) 

     self.lbl1 = QtGui.QLabel("Dialing Number", self) 
     combo1 = QtGui.QComboBox(self) 
     conn = sqlite3.connect('database') 
     combo1.addItem('None') 
     c = conn.cursor() 
     c.execute('''select number from Calling_Directory''') 
     rows = c.fetchall() 
     for row in rows: 
      calling_number=row[0] 
      combo1.addItem(row[0]) 
      #calling_location=row[1] 
      #x=x+120 
     #conn.commit() 
     combo1.move(10, 40) 
     self.lbl1.move(10, 20) 
     self.lbl1.adjustSize() 

     self.lbl2 = QtGui.QLabel("Receiving Number", self) 
     combo2 = QtGui.QComboBox(self) 
     #conn = sqlite3.connect('database') 
     combo2.addItem('None') 
     #c = conn.cursor() 
     c.execute('''select number from Receiving_Directory''') 
     rows2 = c.fetchall() 
     for row in rows2: 
      receiving_number=row[0] 
      combo2.addItem(row[0]) 
      #calling_location=row[1] 
       #x=x+120 
     conn.commit() 
     combo2.move(150, 40) 
     self.lbl2.move(150, 20) 

     self.lbl2.adjustSize() 
     self.show() 

    def closeEvent(self,event): 
     reply=QtGui.QMessageBox.question(self,'Mesage',"Are you sure you want to quit?",QtGui.QMessageBox.Yes | QtGui.QMessageBox.No) 
     if(reply==QtGui.QMessageBox.Yes): 
      event.accept() 
     else: 
      event.ignore() 

def main(): 
    app = QtGui.QApplication(sys.argv) 
    ex=Example() 
    sys.exit(app.exec_()) 

if __name__ == '__main__': 
    main() 

Answer 1

下面是摘录我初始化我的例子类，你想要做什么方法。

它演示了一种简单的方法来从sql调用中填充组合框，然后从组合框中检测用户选择。

cursor = db.cursor() # declare cursor 

    cursor.execute (""" 
     select distinct(region) 
     from mytable 
     where source = %s 
    order by region 
    """ , (mystring)) 

    result = cursor.fetchall() 

    regionlist = [row[0] for row in result] # use list comprehension to convert the tuple array into a list 

    regionlist.insert(0,"*") # prepend * to the list 

    self.ui.region.insertItems(0,regionlist) # set combobox values 

    index = self.ui.region.findText("region7"); # get the corresponding index for specified string in combobox 
    self.ui.region.setCurrentIndex(index) # preselect a combobox value by index 

    #--------------------------------------------- 
    # new style signal slot connections 
    #--------------------------------------------- 

    self.ui.region.currentIndexChanged.connect(self.regionChanged) 

这是可以添加到上面的connect调用的示例类的方法。

def ChangeRegion(self,index): 

    index = self.ui.region.currentIndex() # get current selection from combobox