Loading a simple Qt Designer form in to Pyside

I create a simple form in Qt designer and am trying to load it in to a Qt application I'm creating with PySide but without much luck.

Here's the generated code from `pyside-uic':

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

# Form implementation generated from reading ui file 'clientEditorForm.ui'
#
# Created: Tue Nov  3 23:46:41 2009
#      by: PySide uic UI code generator
#
# WARNING! All changes made in this file will be lost!

from PySide import QtCore, QtGui

class Ui_clientEditorForm(object):
    def setupUi(self, clientEditorForm):
        clientEditorForm.setObjectName("clientEditorForm")
        clientEditorForm.resize(575, 446)
        self.horizontalLayout_3 = QtGui.QHBoxLayout(clientEditorForm)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.splitter = QtGui.QSplitter(clientEditorForm)
        self.splitter.setOrientation(QtCore.Qt.Horizontal)
        self.splitter.setObjectName("splitter")
        self.layoutWidget = QtGui.QWidget(self.splitter)
        self.layoutWidget.setObjectName("layoutWidget")
        self.verticalLayout = QtGui.QVBoxLayout(self.layoutWidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout_2 = QtGui.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.searchLabel = QtGui.QLabel(self.layoutWidget)
        self.searchLabel.setObjectName("searchLabel")
        self.horizontalLayout_2.addWidget(self.searchLabel)
        self.searchEdit = QtGui.QLineEdit(self.layoutWidget)
        self.searchEdit.setObjectName("searchEdit")
        self.horizontalLayout_2.addWidget(self.searchEdit)
        self.clearButton = QtGui.QPushButton(self.layoutWidget)
        self.clearButton.setObjectName("clearButton")
        self.horizontalLayout_2.addWidget(self.clearButton)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.clientListView = QtGui.QListView(self.layoutWidget)
        sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.clientListView.sizePolicy().hasHeightForWidth())
        self.clientListView.setSizePolicy(sizePolicy)
        self.clientListView.setObjectName("clientListView")
        self.verticalLayout.addWidget(self.clientListView)
        self.frame = QtGui.QFrame(self.splitter)
        self.frame.setFrameShape(QtGui.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtGui.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.verticalLayout_3 = QtGui.QVBoxLayout(self.frame)
        self.verticalLayout_3.setObjectName("verticalLayout_3")
        self.formLayout = QtGui.QFormLayout()
        self.formLayout.setObjectName("formLayout")
        self.nameEdit = QtGui.QLineEdit(self.frame)
        self.nameEdit.setObjectName("nameEdit")
        self.formLayout.setWidget(0, QtGui.QFormLayout.FieldRole, self.nameEdit)
        self.nameLabel = QtGui.QLabel(self.frame)
        self.nameLabel.setObjectName("nameLabel")
        self.formLayout.setWidget(0, QtGui.QFormLayout.LabelRole, self.nameLabel)
        self.profileButton = QtGui.QLabel(self.frame)
        self.profileButton.setObjectName("profileButton")
        self.formLayout.setWidget(1, QtGui.QFormLayout.LabelRole, self.profileButton)
        self.addressLabel = QtGui.QLabel(self.frame)
        self.addressLabel.setObjectName("addressLabel")
        self.formLayout.setWidget(2, QtGui.QFormLayout.LabelRole, self.addressLabel)
        self.locationLabel = QtGui.QLabel(self.frame)
        self.locationLabel.setObjectName("locationLabel")
        self.formLayout.setWidget(3, QtGui.QFormLayout.LabelRole, self.locationLabel)
        self.secureLabel = QtGui.QLabel(self.frame)
        self.secureLabel.setObjectName("secureLabel")
        self.formLayout.setWidget(4, QtGui.QFormLayout.LabelRole, self.secureLabel)
        self.UUIDLabel = QtGui.QLabel(self.frame)
        self.UUIDLabel.setObjectName("UUIDLabel")
        self.formLayout.setWidget(5, QtGui.QFormLayout.LabelRole, self.UUIDLabel)
        self.passwordLabel = QtGui.QLabel(self.frame)
        self.passwordLabel.setObjectName("passwordLabel")
        self.formLayout.setWidget(6, QtGui.QFormLayout.LabelRole, self.passwordLabel)
        self.profileComboBox = QtGui.QComboBox(self.frame)
        self.profileComboBox.setObjectName("profileComboBox")
        self.formLayout.setWidget(1, QtGui.QFormLayout.FieldRole, self.profileComboBox)
        self.addressEdit = QtGui.QLineEdit(self.frame)
        self.addressEdit.setObjectName("addressEdit")
        self.formLayout.setWidget(2, QtGui.QFormLayout.FieldRole, self.addressEdit)
        self.locationComboBox = QtGui.QComboBox(self.frame)
        self.locationComboBox.setObjectName("locationComboBox")
        self.formLayout.setWidget(3, QtGui.QFormLayout.FieldRole, self.locationComboBox)
        self.secureComboBox = QtGui.QComboBox(self.frame)
        self.secureComboBox.setObjectName("secureComboBox")
        self.formLayout.setWidget(4, QtGui.QFormLayout.FieldRole, self.secureComboBox)
        self.UUIDEdit = QtGui.QLineEdit(self.frame)
        self.UUIDEdit.setObjectName("UUIDEdit")
        self.formLayout.setWidget(5, QtGui.QFormLayout.FieldRole, self.UUIDEdit)
        self.passwordEdit = QtGui.QLineEdit(self.frame)
        self.passwordEdit.setObjectName("passwordEdit")
        self.formLayout.setWidget(6, QtGui.QFormLayout.FieldRole, self.passwordEdit)
        self.verticalLayout_3.addLayout(self.formLayout)
        self.aliasesGroupBox = QtGui.QGroupBox(self.frame)
        self.aliasesGroupBox.setFlat(False)
        self.aliasesGroupBox.setCheckable(False)
        self.aliasesGroupBox.setObjectName("aliasesGroupBox")
        self.verticalLayout_2 = QtGui.QVBoxLayout(self.aliasesGroupBox)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.aliasesListView = QtGui.QListView(self.aliasesGroupBox)
        self.aliasesListView.setObjectName("aliasesListView")
        self.verticalLayout_2.addWidget(self.aliasesListView)
        self.horizontalLayout_4 = QtGui.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        spacerItem = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
        self.horizontalLayout_4.addItem(spacerItem)
        self.addButton = QtGui.QPushButton(self.aliasesGroupBox)
        self.addButton.setObjectName("addButton")
        self.horizontalLayout_4.addWidget(self.addButton)
        self.removeButton = QtGui.QPushButton(self.aliasesGroupBox)
        self.removeButton.setObjectName("removeButton")
        self.horizontalLayout_4.addWidget(self.removeButton)
        self.verticalLayout_2.addLayout(self.horizontalLayout_4)
        self.verticalLayout_3.addWidget(self.aliasesGroupBox)
        spacerItem1 = QtGui.QSpacerItem(20, 38, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
        self.verticalLayout_3.addItem(spacerItem1)
        self.horizontalLayout = QtGui.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        spacerItem2 = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
        self.horizontalLayout.addItem(spacerItem2)
        self.revertButton = QtGui.QPushButton(self.frame)
        self.revertButton.setObjectName("revertButton")
        self.horizontalLayout.addWidget(self.revertButton)
        self.applyButton = QtGui.QPushButton(self.frame)
        self.applyButton.setObjectName("applyButton")
        self.horizontalLayout.addWidget(self.applyButton)
        self.verticalLayout_3.addLayout(self.horizontalLayout)
        self.horizontalLayout_3.addWidget(self.splitter)
        self.searchLabel.setBuddy(self.searchEdit)
        self.nameLabel.setBuddy(self.nameEdit)
        self.profileButton.setBuddy(self.profileComboBox)
        self.addressLabel.setBuddy(self.addressEdit)
        self.locationLabel.setBuddy(self.locationComboBox)
        self.secureLabel.setBuddy(self.secureComboBox)
        self.UUIDLabel.setBuddy(self.UUIDEdit)
        self.passwordLabel.setBuddy(self.passwordEdit)

        self.retranslateUi(clientEditorForm)
        QtCore.QMetaObject.connectSlotsByName(clientEditorForm)

    def retranslateUi(self, clientEditorForm):
        clientEditorForm.setWindowTitle(QtGui.QApplication.translate("clientEditorForm", "Form", None, QtGui.QApplication.UnicodeUTF8))
        self.searchLabel.setText(QtGui.QApplication.translate("clientEditorForm", "Search", None, QtGui.QApplication.UnicodeUTF8))
        self.clearButton.setText(QtGui.QApplication.translate("clientEditorForm", "Clear", None, QtGui.QApplication.UnicodeUTF8))
        self.nameLabel.setText(QtGui.QApplication.translate("clientEditorForm", "Name", None, QtGui.QApplication.UnicodeUTF8))
        self.profileButton.setText(QtGui.QApplication.translate("clientEditorForm", "Profile", None, QtGui.QApplication.UnicodeUTF8))
        self.addressLabel.setText(QtGui.QApplication.translate("clientEditorForm", "Address", None, QtGui.QApplication.UnicodeUTF8))
        self.locationLabel.setText(QtGui.QApplication.translate("clientEditorForm", "Location", None, QtGui.QApplication.UnicodeUTF8))
        self.secureLabel.setText(QtGui.QApplication.translate("clientEditorForm", "Secure", None, QtGui.QApplication.UnicodeUTF8))
        self.UUIDLabel.setText(QtGui.QApplication.translate("clientEditorForm", "UUID", None, QtGui.QApplication.UnicodeUTF8))
        self.passwordLabel.setText(QtGui.QApplication.translate("clientEditorForm", "Password", None, QtGui.QApplication.UnicodeUTF8))
        self.aliasesGroupBox.setTitle(QtGui.QApplication.translate("clientEditorForm", "Aliases", None, QtGui.QApplication.UnicodeUTF8))
        self.addButton.setText(QtGui.QApplication.translate("clientEditorForm", "Add", None, QtGui.QApplication.UnicodeUTF8))
        self.removeButton.setText(QtGui.QApplication.translate("clientEditorForm", "Remove", None, QtGui.QApplication.UnicodeUTF8))
        self.revertButton.setText(QtGui.QApplication.translate("clientEditorForm", "Revert", None, QtGui.QApplication.UnicodeUTF8))
        self.applyButton.setText(QtGui.QApplication.translate("clientEditorForm", "Apply", None, QtGui.QApplication.UnicodeUTF8))

Then my simple application:

import sys
from PySide import QtCore, QtGui

from clientEditorForm import Ui_clientEditorForm

class MyMainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MyMainWindow, self).__init__(parent)
        self.ui = Ui_clientEditorForm()
        self.ui.setupUi(self)

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    myapp = MyMainWindow()
    myapp.show()
    sys.exit(app.exec_()开发者_Python百科)

However, when I try to run it, I get the following:

QLayout: Attempting to add QLayout "" to QMainWindow "clientEditorForm", which already has a layout

and a segmentation fault. I'm following the basic instructions in this tutorial but I can't tell what I'm doing wrong.

Turns out there is a bug in PySide with the QSpacerItem class. Commenting out the QSpacerItem instances in the code above makes it work just fine. There's a bug report on the PySide bugzilla.

Firstly you are using PySide(Nokia) not PyQt4(Riverbank Computing), although their API's are nearly identical they are not the same project. The PySide examples are available here: git clone git://gitorious.org/pyside/pyside-examples.git

I think the problem may have to do with your call of

super(MyMainWindow, self).__init__(parent)

try

QtGui.QMainWindow.__init__(self, parent)

instead.

I know it seems like it is the same thing, but I've ran into similar problems with super using PyQt4, and from what I can tell Nokia's PySide has the same troubles. It has something to do with weather the Python owns the parent or it's owned by an underlying C++ object. At least give it a try, it'll take less than 5 seconds!

Below is the example I'm basing this off of, it's from the git repo for PySide.

#!/usr/bin/env python

#############################################################################
##
## Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
##
## This file is part of the example classes of the Qt Toolkit.
##
## This file may be used under the terms of the GNU General Public
## License version 2.0 as published by the Free Software Foundation
## and appearing in the file LICENSE.GPL included in the packaging of
## this file.  Please review the following information to ensure GNU
## General Public Licensing requirements will be met:
## http://www.trolltech.com/products/qt/opensource.html
##
## If you are unsure which license is appropriate for your use, please
## review the following information:
## http://www.trolltech.com/products/qt/licensing.html or contact the
## sales department at sales@trolltech.com.
##
## This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
## WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
##
#############################################################################

import sys
from PySide import QtCore, QtGui

from ui_calculatorform import Ui_CalculatorForm


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

        self.ui = Ui_CalculatorForm()

        self.ui.setupUi(self)

    @QtCore.pyqtSignature("int")
    def on_inputSpinBox1_valueChanged(self, value):
        self.ui.outputWidget.setText(QtCore.QString.number(value + self.ui.inputSpinBox2.value()))

    @QtCore.pyqtSignature("int")
    def on_inputSpinBox2_valueChanged(self, value):
        self.ui.outputWidget.setText(QtCore.QString.number(value + self.ui.inputSpinBox1.value()))


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    calculator = CalculatorForm()
    calculator.show()
    sys.exit(app.exec_())