PyQt：如何从QCombobox这是一个QTableWidgetItem信号

Question

我有一个QTableWidget表，其中每行的第一列是QComboBoxex，而这又是表的QTableWidgetItems，其余是正常的文本输入单元格。

请问如何从任何QCombobox中获取“currentIndexChanged（int）”信号，它会告诉我comboboxex从它们发出的行号？

下不起作用：

def insert_row_cb(self, table, cb_col): 
    rows = table.rowCount() 
    table.insertRow(rows) 
    self.set_row_items_cb(table, cb_col) 
    self.resize_rows(table) 
    return table 

def set_row_items_cb(self, table, cb_col): 
    cb = QtGui.QComboBox() 
    signalMapper = QtCore.QSignalMapper() 

    rows = table.rowCount() 
    cols = table.columnCount() 
    for col in range(cols): 
     if col == cb_col: 
      table.setCellWidget(rows - 1, cb_col, cb) 
      signalMapper.setMapping(cb, table.item(0, 0)) 
      cb.currentIndexChanged.connect(signalMapper.map) 
      signalMapper.mapped.connect(self.cb_index_changed) 
     else: 
      table.setItem(rows - 1, col, QtGui.QTableWidgetItem('')) 
    return table 

def cb_index_changed(self, index): 
    print(index) 

谢谢。

*编辑 - 我知道了！ *

我的DataTable类：

from PyQt4 import QtGui, QtCore 

class DataTable(QtCore.QObject): 
cb_index_changed_signal = QtCore.pyqtSignal(QtGui.QWidget) 
def __init__(self, parent = None): 
    QtCore.QObject.__init__(self) 

    self.signalMapper = QtCore.QSignalMapper() 
    self.signalMapper.mapped[QtGui.QWidget].connect(self.on_signalMapper_mapped) 

def insert_row_cb(self, table, cb_col): 
    rows = table.rowCount() 
    table.insertRow(rows) 
    self.set_row_items_cb(table, cb_col) 
    self.resize_rows(table) 
    return table 

def set_row_items_cb(self, table, cb_col): 
    cb = QtGui.QComboBox() 
    cb.currentIndexChanged.connect(self.signalMapper.map) 

    rows = table.rowCount() 
    cols = table.columnCount() 
    for col in range(cols): 
     if col == cb_col: 
      table.setCellWidget(rows - 1, cb_col, cb) 
      cb.row = rows - 1 
      cb.column = cb_col 
      self.signalMapper.setMapping(cb, cb) 
     else: 
      table.setItem(rows - 1, col, QtGui.QTableWidgetItem('')) 
    return table 

def on_signalMapper_mapped(self, cb): 
    self.cb_index_changed_signal.emit(cb) 

在这里，在另一个类我创建一个表：

from scripts.data_table import DataTable 

self.data_table = DataTable(self) 
self.consumption_table = self.data_table.insert_row_cb(self.consumption_table, 0) 
self.data_table.cb_index_changed_signal.connect(self.cb_index_changed_signal) 

def cb_index_changed_signal(self, cb): 
    print ("row: "+str(cb.row)+" column: "+str(cb.column)+" text: "+cb.currentText()) 

Answer 1

像这样的东西应该工作：

#!/usr/bin/env python 
#-*- coding:utf-8 -*- 

#--------- 
# IMPORT 
#--------- 
from PyQt4 import QtGui, QtCore 

#--------- 
# MAIN 
#--------- 
class MyWindow(QtGui.QWidget): 
    def __init__(self, parent=None): 
     super(MyWindow, self).__init__(parent) 

     numberRows = 3 
     numberColumns = 3 

     self.tableWidget = QtGui.QTableWidget(self) 
     self.tableWidget.setRowCount(numberRows) 
     self.tableWidget.setColumnCount(numberColumns) 

     self.signalMapper = QtCore.QSignalMapper(self) 
     self.signalMapper.mapped[QtGui.QWidget].connect(self.on_signalMapper_mapped) 

     for rowNumber in range(numberRows): 
      for columnNumber in range(numberColumns):  
       comboBox = QtGui.QComboBox() 
       comboBox.currentIndexChanged.connect(self.signalMapper.map) 
       comboBox.addItems([ 
        "{0}-{1}-{2}".format(rowNumber, columnNumber, itemNumber) 
        for itemNumber in range(3) 
       ]) 
       comboBox.row = rowNumber 
       comboBox.column = columnNumber 

       self.tableWidget.setCellWidget(rowNumber, columnNumber, comboBox) 

       self.signalMapper.setMapping(comboBox, comboBox) 

     self.layoutVertical = QtGui.QVBoxLayout(self) 
     self.layoutVertical.addWidget(self.tableWidget) 

    @QtCore.pyqtSlot(QtGui.QWidget) 
    def on_signalMapper_mapped(self, comboBox): 
     print "row: {0} column: {1} text: {2}".format(
      comboBox.row, 
      comboBox.column, 
      comboBox.currentText() 
     ) 

if __name__ == "__main__": 
    import sys 

    app = QtGui.QApplication(sys.argv) 
    app.setApplicationName('MyWindow') 

    main = MyWindow() 
    main.resize(333, 111) 
    main.show() 

    sys.exit(app.exec_())