QDialog不能从主窗口(pyQt)打开 [英] QDialog not opening from Main window (pyQt)
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问题描述
从PyQt4导入QtCore,QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
除了AttributeError:
_fromUtf8 = lambda s:s
类Ui_Dialog(对象):
def setupUi(self,Dialog):
Dialog.setObjectName(_fromUtf8(Dialog))
Dialog.setWindowModality(QtCore.Qt.WindowModal)
Dialog.resize(400,300)
Dialog.setWindowTitle(QtGui.QApplication.translate(Dialog,Dialog,None,QtGui.QApplication.UnicodeUTF8))
self.retranslateUi(Dialog)
QtCore $($)
def redlateUi(self,Dialog):
pass
class Ui_MainWindow(object):
def setupUi ,MainWindow):
MainWindow.setObjectName(_fromUtf8(MainWindow))
MainWindow.resize(309,148)
MainWindow.setWindowTitle(QtGui.QApplication.translate(MainWindo w,MainWindow,None,QtGui.QApplication.UnicodeUTF8))
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8(centralwidget))
self.pushButton = QtGui.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(50,30,191,71))
self.pushButton.setText(QtGui.QApplication。 translate(MainWindow,Open Dialog,None,QtGui.QApplication.UnicodeUTF8))
self.pushButton.setObjectName(_fromUtf8(pushButton))
MainWindow.setCentralWidget(self.centralwidget)
self.retranslateUi(MainWindow)
QtCore.QObject.connect(self.pushButton,QtCore.SIGNAL(_fromUtf8(clicked(QAbstractButton *))),self.showDial )
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self,MainWindow):
pass
def showDial(self):
Dialog = QtGui.QDialog()
u = Ui_Dialog()
u.setupUi(Dialog)
Dialog.exec_()
如果__name__ ==__main__:
import sys
app = QtGui.QApplication(sys.argv)
MainWindow = QtGui.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
解决方案
信号连接有错误,应该是:
QtCore.QObject.connect (self.pushButton,QtCore.SIGNAL(_fromUtf8(clicked())),self.showDial)
或更多的pythonic 新式信号和插槽语法 for PyQt 4.5 +:
self.pushButton.clicked.connect(self.showDial)
I'm trying to launch a dialog by clicking a button in the main window: Here's the (qtdesigner generated) code which I modified just to test it .. I've set the showDial function to show the dial when the button is clicked. But it doesn't work :
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.setWindowModality(QtCore.Qt.WindowModal)
Dialog.resize(400, 300)
Dialog.setWindowTitle(QtGui.QApplication.translate("Dialog", "Dialog", None, QtGui.QApplication.UnicodeUTF8))
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
pass
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(309, 148)
MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.pushButton = QtGui.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(50, 30, 191, 71))
self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "Open Dialog", None, QtGui.QApplication.UnicodeUTF8))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
MainWindow.setCentralWidget(self.centralwidget)
self.retranslateUi(MainWindow)
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL(_fromUtf8("clicked(QAbstractButton*)")), self.showDial)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
pass
def showDial(self):
Dialog = QtGui.QDialog()
u = Ui_Dialog()
u.setupUi(Dialog)
Dialog.exec_()
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
MainWindow = QtGui.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
解决方案
There is error in signal connection, it should be:
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL(_fromUtf8("clicked()")), self.showDial)
or in more pythonic New-style Signal and Slot syntax for PyQt 4.5+:
self.pushButton.clicked.connect(self.showDial)
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