Question

当我运行如下的演示程序时，主窗口将调用子窗口，然后子窗口将调用窗口小部件。我想得到这个小部件的一些属性，例如＆＃34; messageLabel＆＃34;但它会报告一个错误，即TypeError：＆＃39; QLabel＆＃39;对象不可调用。那么如何修改这个错误呢？谢谢，

import sys
from PyQt4 import QtCore, QtGui

class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__()
        self.setWindowTitle("MainWindow Window!")
        self.setGeometry(400, 400, 100, 100) 
        self.centerWidget = QtGui.QWidget()
        self.setCentralWidget(self.centerWidget)

        self.pushButton = QtGui.QPushButton("&Button")
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.pushButton)
        self.centerWidget.setLayout(layout)    

class ChildWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(ChildWindow, self).__init__(parent)
        #QtGui.QMainWindow.__init__(self, parent)
        self.setWindowTitle("Child Window!")
        self.centerWidget = Widget(parent)
        self.setCentralWidget(self.centerWidget)

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

        self.messageLabel = QtGui.QLabel()
        self.messageLabel.setText("How to get this message label?")
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.messageLabel)         
        self.setLayout(layout) 

app = QtGui.QApplication(sys.argv)
myapp = MainWindow()  

def showChildWindow():
    child_win = ChildWindow(myapp)
    child_win.show()
    childLabel = child_win.centerWidget.messageLabel().text().__str__().__str__()    #how to call the messageLabel?
    print childLabel

myapp.show()
QtCore.QObject.connect(myapp.pushButton,QtCore.SIGNAL("clicked()"),showChildWindow)  
sys.exit(app.exec_())

TypeError：＆＃39; QLabel＆＃39;对象不可调用

0 个答案: