Question

我想基于combox和combox中的哪一行创建一个事件（在本例中为print）。我查看了old post并进行了一些扩展。它有道理吗？当我按下＆＃34;秒＆＃34;在左侧的combox中我想要输出＆＃34; 0,2＆＃34;当我按下＆＃34;第二个＆＃34;在正确的combox中我想要输出＆＃34; 1,2＆＃34;。

from PyQt4 import QtCore, QtGui
import sys


class MyClass(object):
    def __init__(self, arg):
        super(MyClass, self).__init__()
        self.row = arg
        self.col = []

    def add_column(self, col):
        self.col.append(col)


class myWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(myWindow, self).__init__(parent)
        comboBox = [None, None]
        myObject = [None, None]
        slotLambda = [None, None]
        for j in range(2):
            comboBox[j] = QtGui.QComboBox(self)
            if j > 0:
                comboBox[j].move(100, 0)
            test = [['first', 1], ['second', 2]]
            myObject[j] = MyClass(j)
            for num, value in test:
                comboBox[j].addItem(num)
                myObject[j].add_column(value)
                slotLambda[j] = lambda: self.indexChanged_lambda(myObject[j])
            comboBox[j].currentIndexChanged.connect(slotLambda[j])

    @QtCore.pyqtSlot(str)
    def indexChanged_lambda(self, string):
        print string.row, string.col

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    app.setApplicationName('myApp')
    dialog = myWindow()
    dialog.show()
    sys.exit(app.exec_())

Answer 1

如果使用QComboBox，QComboBox可以存储每个索引的信息，则无需使用lambda函数发送其他信息，addItem()还有一个附加参数可以保存信息我们可以通过itemData()方法访问它，我们可以使用setItemData()方法添加其他信息。

要知道QComboBox发出了我们可以使用sender()的信号，这个方法会返回发出信号的对象。

以上所有内容均在以下示例中实现：

from PyQt4 import QtCore, QtGui
import sys

class myWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(myWindow, self).__init__(parent)

        lay = QtGui.QHBoxLayout(self)
        test = [['first', 1], ['second', 2]]

        for j in range(5):
            comboBox = QtGui.QComboBox(self)
            lay.addWidget(comboBox)
            for i, values in enumerate(test):
                text, data = values
                comboBox.addItem(text, (j, data))
            comboBox.currentIndexChanged.connect(self.onCurrentIndexChanged)

    @QtCore.pyqtSlot(int)
    def onCurrentIndexChanged(self, ix):
        combo = self.sender()
        row, column = combo.itemData(ix)
        print(row, column)


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    app.setApplicationName('myApp')
    dialog = myWindow()
    dialog.show()
    sys.exit(app.exec_())

更改后的pyQT Combobox打印输出

1 个答案: