如果不遵守条件，我如何禁用下一个按钮 PyQt5 QWizard？
How can i disable the next button PyQt5 QWizard if a condition is not respected?
我必须在终端上为脚本 运行 做一个 GUI 来修改 Ubuntu 上的登录背景，我决定使用 PyQt5 QWizard 来做，在第一页我必须如果使用的发行版不兼容，请禁用下一步按钮。我找不到禁用它的方法，我到处搜索但我无法找到禁用它的方法..
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'wizard.ui'
#
# Created by: PyQt5 UI code generator 5.14.2
#
# WARNING! All changes made in this file will be lost!
import os
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QFileDialog
class Ui_Wizard(object):
def setupUi(self, Wizard):
Wizard.setObjectName("Wizard")
Wizard.resize(470, 454)
Wizard.setOptions(QtWidgets.QWizard.NoBackButtonOnLastPage|QtWidgets.QWizard.NoCancelButtonOnLastPage)
self.page_1 = QtWidgets.QWizardPage()
self.page_1.setEnabled(True)
self.page_1.setObjectName("page_1")
self.gridLayout_2 = QtWidgets.QGridLayout(self.page_1)
self.gridLayout_2.setObjectName("gridLayout_2")
self.label_2 = QtWidgets.QLabel(self.page_1)
self.label_2.setAlignment(QtCore.Qt.AlignCenter)
self.label_2.setObjectName("label_2")
self.gridLayout_2.addWidget(self.label_2, 3, 0, 1, 1)
spacerItem = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout_2.addItem(spacerItem, 5, 0, 1, 1)
spacerItem1 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout_2.addItem(spacerItem1, 1, 0, 1, 1)
self.label_1 = QtWidgets.QLabel(self.page_1)
self.label_1.setAlignment(QtCore.Qt.AlignCenter)
self.label_1.setObjectName("label_1")
self.gridLayout_2.addWidget(self.label_1, 2, 0, 1, 1)
self.label_3 = QtWidgets.QLabel(self.page_1)
self.label_3.setAlignment(QtCore.Qt.AlignCenter)
self.label_3.setObjectName("label_3")
self.gridLayout_2.addWidget(self.label_3, 4, 0, 1, 1)
Wizard.addPage(self.page_1)
self.page_2 = QtWidgets.QWizardPage()
self.page_2.setObjectName("page_2")
self.gridLayout = QtWidgets.QGridLayout(self.page_2)
self.gridLayout.setObjectName("gridLayout")
self.label_path = QtWidgets.QLabel(self.page_2)
self.label_path.setObjectName("label_path")
self.gridLayout.addWidget(self.label_path, 1, 0, 1, 1)
spacerItem2 = QtWidgets.QSpacerItem(20, 90, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout.addItem(spacerItem2, 0, 0, 1, 2)
spacerItem3 = QtWidgets.QSpacerItem(20, 90, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout.addItem(spacerItem3, 4, 0, 1, 2)
self.edit_path = QtWidgets.QLineEdit(self.page_2)
self.edit_path.setObjectName("edit_path")
self.gridLayout.addWidget(self.edit_path, 3, 0, 1, 1)
self.browse_path = QtWidgets.QPushButton(self.page_2)
self.browse_path.setObjectName("browse_path")
self.gridLayout.addWidget(self.browse_path, 3, 1, 1, 1)
Wizard.addPage(self.page_2)
self.page_3 = QtWidgets.QWizardPage()
self.page_3.setAutoFillBackground(False)
self.page_3.setObjectName("page_3")
self.verticalLayout = QtWidgets.QVBoxLayout(self.page_3)
self.verticalLayout.setObjectName("verticalLayout")
spacerItem4 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.verticalLayout.addItem(spacerItem4)
self.label_4 = QtWidgets.QLabel(self.page_3)
self.label_4.setAlignment(QtCore.Qt.AlignCenter)
self.label_4.setObjectName("label_4")
self.verticalLayout.addWidget(self.label_4)
self.label_5 = QtWidgets.QLabel(self.page_3)
self.label_5.setAlignment(QtCore.Qt.AlignCenter)
self.label_5.setObjectName("label_5")
self.verticalLayout.addWidget(self.label_5)
self.label_6 = QtWidgets.QLabel(self.page_3)
self.label_6.setAlignment(QtCore.Qt.AlignCenter)
self.label_6.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse)
self.label_6.setObjectName("label_6")
self.verticalLayout.addWidget(self.label_6)
spacerItem5 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.verticalLayout.addItem(spacerItem5)
Wizard.addPage(self.page_3)
self.retranslateUi(Wizard)
QtCore.QMetaObject.connectSlotsByName(Wizard)
def retranslateUi(self, Wizard):
_translate = QtCore.QCoreApplication.translate
Wizard.setWindowTitle(_translate("Wizard", "Wizard"))
self.page_1.setTitle(_translate("Wizard", "Change gdm Background wizard"))
self.page_1.setSubTitle(_translate("Wizard", "Welcomet to the Change gdm Background wizard, and thank you for the download"))
self.label_2.setText(_translate("Wizard", "Compatibility: Ubuntu 20.04"))
self.label_1.setText(_translate("Wizard", "Use at your own risk"))
value = self.check_distro()
self.label_3.setText(_translate("Wizard", value))
self.page_2.setSubTitle(_translate("Wizard", "Select the image to use as background"))
self.label_path.setText(_translate("Wizard", "File Path"))
self.browse_path.setText(_translate("Wizard", "..."))
self.browse_path.clicked.connect(self.select_file)
self.label_4.setText(_translate("Wizard", "Background set, restarting your device"))
self.label_5.setText(_translate("Wizard", "Thank you for download"))
self.label_6.setText(_translate("Wizard", "Credits to: ..."))
# To check ubuntu version
# script usable only if usinng ubuntu 20.04
def check_distro(self):
check = os.uname()
if "Ubuntu" and "20.04" not in check[3]:
value = "Not compatible with your Distro \n Please stop"
else:
value = "Compatible with your Distro \n Please go ahead"
# next_btn = QtWidget.QtGui.QWizard.NextButton
# next_btn.setEnabled(False)
return value
# To open FileDialog and select file
# TODO: Add filtering file, to select only specific extension files.
# example .jpg or photo format
def select_file(self):
title = "Explorer"
qfd = QFileDialog()
path = "$HOME"
filter = "All Images(*.jpg | *.jpeg | *.png);;JPG Only(*.jpg);;JPEG Only(*.jpeg);;PNG Only(*.png)"
filename = QFileDialog.getOpenFileName(qfd, title, path, filter)
# filter_file(title)
# filename = QFileDialog.getOpenFileName()
self.edit_path.setText(filename[0])
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Wizard = QtWidgets.QWizard()
ui = Ui_Wizard()
ui.setupUi(Wizard)
Wizard.show()
sys.exit(app.exec_())
就在第一页，在方法“check_distro”中，我必须在 if
的第一个案例中禁用“下一步”按钮
您必须覆盖 returns 是否可以前进到下一页的 isComplete 方法。
另一方面，您用来验证OS是否为Ubuntu 20.04的方法不正确，因此使用distro库重写（您可以安装它与 python -m pip install distro 或者如果你在 ubuntu 或兼容系统上那么你可以用 sudo apt-get python3-distro.
安装它
import distro
from PyQt5 import QtCore, QtGui, QtWidgets
class FirstPage(QtWidgets.QWizardPage):
def __init__(self, parent=None):
super().__init__(parent)
self.setTitle("Change gdm Background wizard")
self.setSubTitle(
"Welcomet to the Change gdm Background wizard, and thank you for the download"
)
lay = QtWidgets.QVBoxLayout(self)
self.message_label = QtWidgets.QLabel(alignment=QtCore.Qt.AlignCenter)
lay.addStretch()
lay.addWidget(self.message_label)
lay.addStretch()
message = "Use at your own risk\nCompatibility: Ubuntu 20.04\n%s" % (
"Compatible with your Distro \n Please go ahead"
if self.check_distro()
else "Not compatible with your Distro \n Please stop"
)
self.message_label.setText(message)
def check_distro(self):
return distro.name() == "Ubuntu" and distro.version() == "20.04"
def isComplete(self):
return self.check_distro() and super().isComplete()
class SecondPage(QtWidgets.QWizardPage):
def __init__(self, parent=None):
super().__init__(parent)
self.setSubTitle("Select the image to use as background")
self.path_le = QtWidgets.QLineEdit()
self.path_btn = QtWidgets.QPushButton("...")
self.path_lbl = QtWidgets.QLabel()
lay = QtWidgets.QGridLayout(self)
lay.addWidget(QtWidgets.QLabel("File Path"))
lay.addWidget(self.path_le, 1, 0)
lay.addWidget(self.path_btn, 1, 1)
lay.addWidget(self.path_lbl, 2, 0, 1, 2)
self.path_btn.clicked.connect(self.handle_clicked)
@QtCore.pyqtSlot()
def handle_clicked(self):
title = "Explorer"
path = "$HOME"
filter = "All Images(*.jpg | *.jpeg | *.png);;JPG Only(*.jpg);;JPEG Only(*.jpeg);;PNG Only(*.png)"
filename, _ = QtWidgets.QFileDialog.getOpenFileName(None, title, path, filter)
if filename:
self.path_le.setText(filename)
self.path_lbl.setPixmap(QtGui.QPixmap(filename))
self.completeChanged.emit()
def isComplete(self):
return bool(self.path_le.text()) and super().isComplete()
class ThirdPage(QtWidgets.QWizardPage):
def __init__(self, parent=None):
super().__init__(parent)
lay = QtWidgets.QVBoxLayout(self)
self.message_label = QtWidgets.QLabel(alignment=QtCore.Qt.AlignCenter)
lay.addStretch()
lay.addWidget(self.message_label)
lay.addStretch()
self.message_label.setText(
"Background set, restarting your device\nThank you for download\nCredits to: ..."
)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = QtWidgets.QWizard()
w.setOptions(
QtWidgets.QWizard.NoBackButtonOnLastPage
| QtWidgets.QWizard.NoCancelButtonOnLastPage
)
w.addPage(FirstPage())
w.addPage(SecondPage())
w.addPage(ThirdPage())
w.show()
sys.exit(app.exec_())
我必须在终端上为脚本 运行 做一个 GUI 来修改 Ubuntu 上的登录背景，我决定使用 PyQt5 QWizard 来做，在第一页我必须如果使用的发行版不兼容，请禁用下一步按钮。我找不到禁用它的方法，我到处搜索但我无法找到禁用它的方法..
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'wizard.ui'
#
# Created by: PyQt5 UI code generator 5.14.2
#
# WARNING! All changes made in this file will be lost!
import os
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QFileDialog
class Ui_Wizard(object):
def setupUi(self, Wizard):
Wizard.setObjectName("Wizard")
Wizard.resize(470, 454)
Wizard.setOptions(QtWidgets.QWizard.NoBackButtonOnLastPage|QtWidgets.QWizard.NoCancelButtonOnLastPage)
self.page_1 = QtWidgets.QWizardPage()
self.page_1.setEnabled(True)
self.page_1.setObjectName("page_1")
self.gridLayout_2 = QtWidgets.QGridLayout(self.page_1)
self.gridLayout_2.setObjectName("gridLayout_2")
self.label_2 = QtWidgets.QLabel(self.page_1)
self.label_2.setAlignment(QtCore.Qt.AlignCenter)
self.label_2.setObjectName("label_2")
self.gridLayout_2.addWidget(self.label_2, 3, 0, 1, 1)
spacerItem = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout_2.addItem(spacerItem, 5, 0, 1, 1)
spacerItem1 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout_2.addItem(spacerItem1, 1, 0, 1, 1)
self.label_1 = QtWidgets.QLabel(self.page_1)
self.label_1.setAlignment(QtCore.Qt.AlignCenter)
self.label_1.setObjectName("label_1")
self.gridLayout_2.addWidget(self.label_1, 2, 0, 1, 1)
self.label_3 = QtWidgets.QLabel(self.page_1)
self.label_3.setAlignment(QtCore.Qt.AlignCenter)
self.label_3.setObjectName("label_3")
self.gridLayout_2.addWidget(self.label_3, 4, 0, 1, 1)
Wizard.addPage(self.page_1)
self.page_2 = QtWidgets.QWizardPage()
self.page_2.setObjectName("page_2")
self.gridLayout = QtWidgets.QGridLayout(self.page_2)
self.gridLayout.setObjectName("gridLayout")
self.label_path = QtWidgets.QLabel(self.page_2)
self.label_path.setObjectName("label_path")
self.gridLayout.addWidget(self.label_path, 1, 0, 1, 1)
spacerItem2 = QtWidgets.QSpacerItem(20, 90, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout.addItem(spacerItem2, 0, 0, 1, 2)
spacerItem3 = QtWidgets.QSpacerItem(20, 90, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout.addItem(spacerItem3, 4, 0, 1, 2)
self.edit_path = QtWidgets.QLineEdit(self.page_2)
self.edit_path.setObjectName("edit_path")
self.gridLayout.addWidget(self.edit_path, 3, 0, 1, 1)
self.browse_path = QtWidgets.QPushButton(self.page_2)
self.browse_path.setObjectName("browse_path")
self.gridLayout.addWidget(self.browse_path, 3, 1, 1, 1)
Wizard.addPage(self.page_2)
self.page_3 = QtWidgets.QWizardPage()
self.page_3.setAutoFillBackground(False)
self.page_3.setObjectName("page_3")
self.verticalLayout = QtWidgets.QVBoxLayout(self.page_3)
self.verticalLayout.setObjectName("verticalLayout")
spacerItem4 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.verticalLayout.addItem(spacerItem4)
self.label_4 = QtWidgets.QLabel(self.page_3)
self.label_4.setAlignment(QtCore.Qt.AlignCenter)
self.label_4.setObjectName("label_4")
self.verticalLayout.addWidget(self.label_4)
self.label_5 = QtWidgets.QLabel(self.page_3)
self.label_5.setAlignment(QtCore.Qt.AlignCenter)
self.label_5.setObjectName("label_5")
self.verticalLayout.addWidget(self.label_5)
self.label_6 = QtWidgets.QLabel(self.page_3)
self.label_6.setAlignment(QtCore.Qt.AlignCenter)
self.label_6.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByMouse)
self.label_6.setObjectName("label_6")
self.verticalLayout.addWidget(self.label_6)
spacerItem5 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.verticalLayout.addItem(spacerItem5)
Wizard.addPage(self.page_3)
self.retranslateUi(Wizard)
QtCore.QMetaObject.connectSlotsByName(Wizard)
def retranslateUi(self, Wizard):
_translate = QtCore.QCoreApplication.translate
Wizard.setWindowTitle(_translate("Wizard", "Wizard"))
self.page_1.setTitle(_translate("Wizard", "Change gdm Background wizard"))
self.page_1.setSubTitle(_translate("Wizard", "Welcomet to the Change gdm Background wizard, and thank you for the download"))
self.label_2.setText(_translate("Wizard", "Compatibility: Ubuntu 20.04"))
self.label_1.setText(_translate("Wizard", "Use at your own risk"))
value = self.check_distro()
self.label_3.setText(_translate("Wizard", value))
self.page_2.setSubTitle(_translate("Wizard", "Select the image to use as background"))
self.label_path.setText(_translate("Wizard", "File Path"))
self.browse_path.setText(_translate("Wizard", "..."))
self.browse_path.clicked.connect(self.select_file)
self.label_4.setText(_translate("Wizard", "Background set, restarting your device"))
self.label_5.setText(_translate("Wizard", "Thank you for download"))
self.label_6.setText(_translate("Wizard", "Credits to: ..."))
# To check ubuntu version
# script usable only if usinng ubuntu 20.04
def check_distro(self):
check = os.uname()
if "Ubuntu" and "20.04" not in check[3]:
value = "Not compatible with your Distro \n Please stop"
else:
value = "Compatible with your Distro \n Please go ahead"
# next_btn = QtWidget.QtGui.QWizard.NextButton
# next_btn.setEnabled(False)
return value
# To open FileDialog and select file
# TODO: Add filtering file, to select only specific extension files.
# example .jpg or photo format
def select_file(self):
title = "Explorer"
qfd = QFileDialog()
path = "$HOME"
filter = "All Images(*.jpg | *.jpeg | *.png);;JPG Only(*.jpg);;JPEG Only(*.jpeg);;PNG Only(*.png)"
filename = QFileDialog.getOpenFileName(qfd, title, path, filter)
# filter_file(title)
# filename = QFileDialog.getOpenFileName()
self.edit_path.setText(filename[0])
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Wizard = QtWidgets.QWizard()
ui = Ui_Wizard()
ui.setupUi(Wizard)
Wizard.show()
sys.exit(app.exec_())
就在第一页，在方法“check_distro”中，我必须在 if
的第一个案例中禁用“下一步”按钮您必须覆盖 returns 是否可以前进到下一页的 isComplete 方法。
另一方面，您用来验证OS是否为Ubuntu 20.04的方法不正确，因此使用distro库重写（您可以安装它与 python -m pip install distro 或者如果你在 ubuntu 或兼容系统上那么你可以用 sudo apt-get python3-distro.
import distro
from PyQt5 import QtCore, QtGui, QtWidgets
class FirstPage(QtWidgets.QWizardPage):
def __init__(self, parent=None):
super().__init__(parent)
self.setTitle("Change gdm Background wizard")
self.setSubTitle(
"Welcomet to the Change gdm Background wizard, and thank you for the download"
)
lay = QtWidgets.QVBoxLayout(self)
self.message_label = QtWidgets.QLabel(alignment=QtCore.Qt.AlignCenter)
lay.addStretch()
lay.addWidget(self.message_label)
lay.addStretch()
message = "Use at your own risk\nCompatibility: Ubuntu 20.04\n%s" % (
"Compatible with your Distro \n Please go ahead"
if self.check_distro()
else "Not compatible with your Distro \n Please stop"
)
self.message_label.setText(message)
def check_distro(self):
return distro.name() == "Ubuntu" and distro.version() == "20.04"
def isComplete(self):
return self.check_distro() and super().isComplete()
class SecondPage(QtWidgets.QWizardPage):
def __init__(self, parent=None):
super().__init__(parent)
self.setSubTitle("Select the image to use as background")
self.path_le = QtWidgets.QLineEdit()
self.path_btn = QtWidgets.QPushButton("...")
self.path_lbl = QtWidgets.QLabel()
lay = QtWidgets.QGridLayout(self)
lay.addWidget(QtWidgets.QLabel("File Path"))
lay.addWidget(self.path_le, 1, 0)
lay.addWidget(self.path_btn, 1, 1)
lay.addWidget(self.path_lbl, 2, 0, 1, 2)
self.path_btn.clicked.connect(self.handle_clicked)
@QtCore.pyqtSlot()
def handle_clicked(self):
title = "Explorer"
path = "$HOME"
filter = "All Images(*.jpg | *.jpeg | *.png);;JPG Only(*.jpg);;JPEG Only(*.jpeg);;PNG Only(*.png)"
filename, _ = QtWidgets.QFileDialog.getOpenFileName(None, title, path, filter)
if filename:
self.path_le.setText(filename)
self.path_lbl.setPixmap(QtGui.QPixmap(filename))
self.completeChanged.emit()
def isComplete(self):
return bool(self.path_le.text()) and super().isComplete()
class ThirdPage(QtWidgets.QWizardPage):
def __init__(self, parent=None):
super().__init__(parent)
lay = QtWidgets.QVBoxLayout(self)
self.message_label = QtWidgets.QLabel(alignment=QtCore.Qt.AlignCenter)
lay.addStretch()
lay.addWidget(self.message_label)
lay.addStretch()
self.message_label.setText(
"Background set, restarting your device\nThank you for download\nCredits to: ..."
)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = QtWidgets.QWizard()
w.setOptions(
QtWidgets.QWizard.NoBackButtonOnLastPage
| QtWidgets.QWizard.NoCancelButtonOnLastPage
)
w.addPage(FirstPage())
w.addPage(SecondPage())
w.addPage(ThirdPage())
w.show()
sys.exit(app.exec_())