如何在两个PyQt5 MainWindow小部件之间切换

时间:2018-06-27 19:56:31

标签: python pyqt5

我正在编写一个包含两个不同部分的程序-我们将其称为sub1和sub2。最初运行程序时,显示sub1,并且在后台加载sub2,但不显示它。我在sub1中有一个菜单操作,它允许您切换到sub2,而在sub2中有一个菜单操作,可以使您切换回sub1。我遇到的问题是尝试从sub2切换回sub1时。从sub1转到sub2可以正常工作; sub1被隐藏,sub2被显示。但是,当尝试再次显示sub1时,sub2不会被隐藏。我是PyQt和Python的新手,所以我还不了解所有的复杂性。因此,我使用的方法只是我通过反复试验得出的结论,而绝非必须采用这种方法。下面是简化的代码。

#mass module
class MASS(PyQt5.QtWidgets.QMainWindow, massUi.Ui_MainWindow):
    def __init__(self):
        super(MASS, self).__init__()
        self.actionSwitchToCompEval.triggered.connect(self.switchToCompEval)

    def switchToCompEval(self):
        massForm = main.massForm
        massForm.hide()
        compForm = main.compForm
        compForm.show()

    def showMass(self):
        main(1)

def main(initiate=None):
    if initiate == None:
        main.app = PyQt5.QtWidgets.QApplication(sys.argv)
        main.massForm = MASS()
        main.compForm = CompEval.CompEval()
        main.massForm.show()
        main.app.exec_()    
    elif initiate == 1:
        main.massForm = MASS()
        main.compForm = CompEval.CompEval()
        main.compForm.hide()
        main.massForm.show()
    elif initiate == 2:
        pass

if __name__ == '__main__':
    main()    


#comp module

class CompEval(PyQt5.QtWidgets.QMainWindow, compEvalUi.Ui_MainWindow):
    def __init__(self):
        super(CompEval, self).__init__()
        self.actionSwitchToMASS.triggered.connect(self.switchToMass)

    def switchToMass(self):
        mass.MASS().showMass()

def main():
    form = CompEval()
    form.show()

在switchToCompEval函数中,似乎似乎可以很好地引用main.massForm和main.compForm变量,但是当我尝试从sub2(comp)返回sub1(mass)时出现错误,该函数没有包含该变量,这对我来说似乎很奇怪。我知道目前如何进行此设置的几个方面很奇怪,远非理想,因此任何建议都将不胜感激。谢谢。

2 个答案:

答案 0 :(得分:0)

因此,经过大量的实验,我确定针对此问题的最佳解决方案是将模块组合为一个。如果您有多个MainWindow小部件,并且需要能够在它们之间来回切换,则将访问这些小部件的类都保留在同一模块中。

所以我有两个小部件类:

import PyQt5
import sys
#Below are the modules that are auto-generated when using Qt Designer to make an interface
import compWidget as compEvalUi
import massWidget as massUi 

class MASS(PyQt5.QtWidgets.QMainWindow, massUi.Ui_MainWindow
    def __init__(self):
        super(MASS, self).__init__()
        #setupUi function is in the auto-generated module and contains all the attributes of the interface
        self.setupUi(self)
        #menuSwitch is the name of the button/menu item that would need to be clicked
        #in order to switch windows. 
        #The example shown here is if the action was attached to a menu-dropdown item
        #which is why 'triggered' is used as opposed to 'clicked' if it were attached to a button
        self.menuSwitch.triggered.connect(self.switchToCompWidget)

    def switchToCompWidget(self):
        INITIALIZE.massForm.hide()
        INITIALIZE.compForm.show()

class CompEval(PyQt5.QtWidgets.QMainWindow, compEvalUi.Ui_MainWindow):
    def __init__(self):
        super(CompEval, self).__init__()
        self.setupUi(self)
        self.menuSwitch.triggered.connect(self.switchToMassWidget)

    def switchToMassWidget(self):
        INITIALIZE.compForm.hide()
        INITIALIZE.massForm.show()

class INITIALIZE:
    def __init__(self):
        app = PyQt5.QtWidgets.QApplication(sys.argv)
        INITIALIZE.massForm = MASS()
        INITIALIZE.massForm.show()
        INITIALIZE.compForm = CompEval()
        app.exec_()

def main():
    program = INITIALIZE()

if __name__ =='__main__':
    main()

答案 1 :(得分:0)

您可以使用信号和插槽来分隔逻辑,而不必在类之间共享全局参数。