PYQT4 多窗口切换问题

qq_36893425 2017-08-14 04:25:45

hi,坛里的高手们
引用一片文章里的例子
http://blog.csdn.net/sollor525/article/details/40076395
在这个例子中，用PYQT4 实现了多窗口的切换，但是有一个问题想请教下，主窗体在调用dialog1和dialog2的时候，被调用的窗体dialog1和dialog2上的工具栏上原本是缩小和放大的图案显示的是问号，我想这个应该是调用QDailog类窗体的原因吧，那么如果要把这个改成QWidget类型的话，是不是就ok了，但是我不知道该怎么写，请大牛帮助下，谢谢！

主界面：

# -*- coding: utf-8 -*-



from PyQt4 import QtCore, QtGui

from dialog1 import Dialog1

from dialog2 import Dialog2

import sys



try:

    _fromUtf8 = QtCore.QString.fromUtf8

except AttributeError:

    def _fromUtf8(s):

        return s



try:

    _encoding = QtGui.QApplication.UnicodeUTF8

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig, _encoding)

except AttributeError:

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig)

    

class MainWindow(QtGui.QWidget): 

    

    dialog1_signal = QtCore.pyqtSignal()          #定义一个无参数的信号，串口设定与子站初始化信号

    dialog2_signal = QtCore.pyqtSignal()          #定义一个无参数的信号，串口设定与子站初始化信号

    exit_signal = QtCore.pyqtSignal()          #定义一个无参数的信号，串口设定与子站初始化信号

    

    def __init__(self):

        super(MainWindow,self).__init__()

        

    def setupUi(self, Form):

        Form.setObjectName(_fromUtf8("Form"))

        Form.resize(400, 300)

        self.form = Form

        self.pushButton = QtGui.QPushButton(Form)

        self.pushButton.setGeometry(QtCore.QRect(70, 90, 75, 23))

        self.pushButton.setObjectName(_fromUtf8("pushButton"))

        self.pushButton_2 = QtGui.QPushButton(Form)

        self.pushButton_2.setGeometry(QtCore.QRect(240, 90, 75, 23))

        self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))

        self.pushButton_3 = QtGui.QPushButton(Form)

        self.pushButton_3.setGeometry(QtCore.QRect(150, 160, 75, 23))

        self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))

        self.label = QtGui.QLabel(Form)

        self.label.setGeometry(QtCore.QRect(170, 40, 54, 16))

        self.label.setObjectName(_fromUtf8("label"))



        self.retranslateUi(Form)

        QtCore.QMetaObject.connectSlotsByName(Form)



        #信号连接到指定槽

        self.pushButton.clicked.connect(self.on_pushButton_clicked)

        self.pushButton_2.clicked.connect(self.on_pushButton_2_clicked)

        self.pushButton_3.clicked.connect(self.on_pushButton_3_clicked)

        

        

    def retranslateUi(self, Form):

        Form.setWindowTitle(_translate("Form", "Form", None))

        self.pushButton.setText(_translate("Form", "进入dialog1", None))

        self.pushButton_2.setText(_translate("Form", "进入dialog2", None))

        self.pushButton_3.setText(_translate("Form", "退出", None))

        self.label.setText(_translate("Form", "主窗体", None))

        

    def on_pushButton_clicked(self):

        self.form.hide()

        Form1 = QtGui.QDialog()

        ui = Dialog1()

        ui.setupUi(Form1)

        Form1.show()

        Form1.exec_()

        self.form.show()



    def on_pushButton_3_clicked(self, Form):

        #QtCore.QObject.connect( self.pushButton_3, QtCore.SIGNAL("clicked()"), self, QtCore.SLOT(quit()))

        #也可以这样

        self.form.close()

        

    def on_pushButton_2_clicked(self):

        self.form.close()

        Form1 = QtGui.QDialog()

        ui = Dialog2()

        ui.setupUi(Form1)

        Form1.show()

        Form1.exec_()

        self.form.show()



if __name__ == '__main__':

    app = QtGui.QApplication(sys.argv)

    Form = QtGui.QWidget()

    window = MainWindow()  

    window.setupUi(Form)

    Form.show()   

    sys.exit(app.exec_())

Dialog1界面的代码如下：

# -*- coding: utf-8 -*-



from PyQt4 import QtCore, QtGui





try:

    _fromUtf8 = QtCore.QString.fromUtf8

except AttributeError:

    def _fromUtf8(s):

        return s



try:

    _encoding = QtGui.QApplication.UnicodeUTF8

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig, _encoding)

except AttributeError:

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig)

 

class Dialog1(QtGui.QWidget):

    def setupUi(self, Dialog):

        Dialog.setObjectName(_fromUtf8("Dialog"))

        Dialog.resize(400, 300)

        self.form = Dialog

        self.label = QtGui.QLabel(Dialog)

        self.label.setGeometry(QtCore.QRect(180, 50, 54, 12))

        self.label.setObjectName(_fromUtf8("label"))

        self.dialog1_pushButton = QtGui.QPushButton(Dialog)

        self.dialog1_pushButton.setGeometry(QtCore.QRect(160, 130, 75, 23))

        self.dialog1_pushButton.setObjectName(_fromUtf8("pushButton"))



        self.retranslateUi(Dialog)

        QtCore.QMetaObject.connectSlotsByName(Dialog)



        #信号连接到指定槽

        self.dialog1_pushButton.clicked.connect(self.on_dialog1_pushButton_clicked)

        

    def retranslateUi(self, Dialog):

        Dialog.setWindowTitle(_translate("Dialog", "Dialog", None))

        self.label.setText(_translate("Dialog", "dialog1", None))

        self.dialog1_pushButton.setText(_translate("Dialog", "返回主窗体", None))



    def on_dialog1_pushButton_clicked(self):

        self.form.close()



if __name__ == "__main__":

    import sys

    app = QtGui.QApplication(sys.argv)

    Dialog = QtGui.QDialog()

    ui = Dialog1()

    ui.setupUi(Dialog)

    Dialog.show()

    sys.exit(app.exec_())

Dialog2界面的代码如下：

# -*- coding: utf-8 -*-



from PyQt4 import QtCore, QtGui





try:

    _fromUtf8 = QtCore.QString.fromUtf8

except AttributeError:

    def _fromUtf8(s):

        return s



try:

    _encoding = QtGui.QApplication.UnicodeUTF8

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig, _encoding)

except AttributeError:

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig)

 

class Dialog2(object):

    def setupUi(self, Dialog):

        Dialog.setObjectName(_fromUtf8("Dialog"))

        Dialog.resize(400, 300)

        self.form = Dialog

        self.label = QtGui.QLabel(Dialog)

        self.label.setGeometry(QtCore.QRect(180, 60, 54, 12))

        self.label.setObjectName(_fromUtf8("label"))

        self.pushButton = QtGui.QPushButton(Dialog)

        self.pushButton.setGeometry(QtCore.QRect(160, 140, 75, 23))

        self.pushButton.setObjectName(_fromUtf8("pushButton"))



        self.retranslateUi(Dialog)

        QtCore.QMetaObject.connectSlotsByName(Dialog)

        

        #信号连接到指定槽

        self.pushButton.clicked.connect(self.on_pushButton_clicked)

        

    def retranslateUi(self, Dialog):

        Dialog.setWindowTitle(_translate("Dialog", "Dialog", None))

        self.label.setText(_translate("Dialog", "dialog2", None))

        self.pushButton.setText(_translate("Dialog", "返回主窗体", None))

        

    def on_pushButton_clicked(self):

        self.form .close()



if __name__ == "__main__":

    import sys

    app = QtGui.QApplication(sys.argv)

    Dialog = QtGui.QDialog()

    ui = Dialog2()

    ui.setupUi(Dialog)

    Dialog.show()

    sys.exit(app.exec_())

其实，如果将Dialog1和Dialog2中的主函数中Dialog = QtGui.QDialog()改成Dialog = QtGui.QWidget()，单独运行后工具栏上都不会有问号出现，但是当它们都被主界面函数调用的时候，如果在主界面函数中写成

    def on_pushButton_clicked(self):

        self.form.hide()

        Form1 = QtGui.QWidget ()

        ui = Dialog1()

        ui.setupUi(Form1)

        Form1.show()

        Form1.exec_()

        self.form.show()