如何在Python PyQt4中设置现有MainWidnow的中央小部件？ [英] How to set the central widget of existing MainWidnow in Python PyQt4?

问题描述

我有一个由 3个类组成的代码。类 widget1 和 widget2 继承自 QFrame 类，并包括 lineedit 和 combobox 中的一个供用户输入信息。

I have a code which consists of 3 classes. The classes widget1 and widget2 inherit from QFrame class and consists of several lineedit and combobox for the user to enter information.

所以，我想要的是：启动程序时，它将首先使用以下命令调出 QMainWindow 类 widget1 设置为中央小工具。

So, what I want is: when the program is launched, it will firstly bring up the QMainWindow class with widget1 set as the central widget.

widget1 具有检查功能，该功能已连接到一个按钮上。复选按钮将根据用户在页面上输入的数据来检查条件是否为真。

The widget1 has a Check function which is connected to a button on it. The check button will check whether a condition is true based on the data entered by the user on the page.

如果条件为真。我希望 widget2 将其设置为 MainWindow 中央假发 >替换现有的中央小工具，即 widget1 。

If the condition is true. I want the widget2 to set it as central wiget of MainWindow to replace existing central widget, the widget1.

我的问题是，如何将 widget2 设置为现有 MainWidnow 类实例的中央小部件？

My question is, how do I set the widget2 as the central widget of existing MainWidnow class instance?

这是我的代码格式：

class widget1(QtGui.QFrame):
    def __init__(self,parent = None):
        ......
        ......

    def Check(self):
       if (condition):
           #set widget2 as central widget on MainWindow

class widget2(QtGui.QFrame):
    def __int__(self,parent = None):
        .....
        .....

class MainWindow(QtGui.QMainWindow):
    def __init__(self,parent = None):
        QtGui.QMainWindow.__init__(self,parent)
        ....
        mywidgetone = widget1()
        self.setCentralWidget(mywidgetone)

if __name__ == '__main__':
    app = QtGui.QApplicaiton(sys.argv)
    main = MainWindow()
    main.show()
    app.exec_()

推荐答案

我将对 MainWindow ：

class MainWindow(QtGui.QMainWindow):
    def __init__(self,parent = None):
        QtGui.QMainWindow.__init__(self,parent)
        ....
        self.setMyCentral(widget1)

    def setMyCentral(self, widgetClass):
        mywidget = widgetClass(self)
        self.setCentralWidget(mywidget)

，然后在 widget1 中：

def Check(self):
   if (condition):
       self.parent().setMyCentral(widget2)

现在，请遵循以下约定：类以大写字母开头（ Widget1 ， Widget2 ）和方法不要（检查而不是检查）

Now, please, follow the conventions: classes start in capital letters (Widget1, Widget2) and methods don't (check instead of Check)

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