hi i wrote a python program in qt i want to call a function in pushbutton but its not work
my code is:
i write this code in pycharm and run this code but its not work
i tested it in idle , vs , other environment but this is not work. when i use jcopy function to pushbutton event its work and its copy lineEdit text to lineEdit_2 text but when i want to use the jtrans function for translate the text of lineEdit and and copy result to lineEdit2 program is not work. in pycharm and vs , idle dont sent any error but not work,so i write the same consol program that run in terminal that run currectly
from PyQt5 import QtCore, QtGui, QtWidgets
from googletrans import Translator
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(598, 456)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(30, 30, 201, 16))
font = QtGui.QFont()
font.setPointSize(12)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setObjectName("label")
self.comboBox = QtWidgets.QComboBox(self.centralwidget)
self.comboBox.setGeometry(QtCore.QRect(150, 220, 131, 22))
self.comboBox.setObjectName("comboBox")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(30, 220, 201, 16))
font = QtGui.QFont()
font.setPointSize(12)
font.setBold(True)
font.setWeight(75)
self.label_2.setFont(font)
self.label_2.setObjectName("label_2")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(480, 220, 75, 23))
self.pushButton.setObjectName("pushButton")
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(30, 60, 551, 131))
self.lineEdit.setText("")
self.lineEdit.setObjectName("lineEdit")
self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit_2.setGeometry(QtCore.QRect(30, 250, 541, 141))
self.lineEdit_2.setObjectName("lineEdit_2")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 598, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
self.pushButton.clicked.connect(self.jtrans)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label.setText(_translate("MainWindow", "Input Text:"))
self.comboBox.setItemText(0, _translate("MainWindow", "persian"))
self.comboBox.setItemText(1, _translate("MainWindow", "english"))
self.comboBox.setItemText(2, _translate("MainWindow", "arabic"))
self.comboBox.setItemText(3, _translate("MainWindow", "danish"))
self.comboBox.setItemText(4, _translate("MainWindow", "dutch"))
self.label_2.setText(_translate("MainWindow", "output Text:"))
self.pushButton.setText(_translate("MainWindow", "translate"))
# def jcopy(self):
# t1=self.lineEdit.text()
# self.lineEdit_2.setText(t1)
def jtrans(self, translator=None):
srcString = self.lineEdit.text()
srcLang = translator.detect(srcString)
dstLang = self.comboBox.currentText()
translated = translator.translate(srcString, src=srcLang, dest=dstLang)
self.lineEdit_2.setText(translated.text)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
jcopy function only is a fuction that i know the pushbutton run the code
the problem is in sippet code:
def jtrans(self, translator=None):
srcString = self.lineEdit.text()
srcLang = translator.detect(srcString)
dstLang = self.comboBox.currentText()
translated = translator.translate(srcString, src=srcLang, dest=dstLang)
self.lineEdit_2.setText(translated.text)
anybody can solve this problem
tnx
You have a trivial error: Why do you set object translator to def jtrans(self, translator=None):? Do you think object translator was magically created? Well, no. If the error message is checked:
Traceback (most recent call last):
File "foo.py", line 74, in jtrans
srcLang = translator.detect(srcString)
AttributeError: 'bool' object has no attribute 'detect'
It is understandable that it is not magically created, but X takes the value of what the default clicked signal sends: a boolean.
Before proposing the PyQt solution, I recommend not modifying the code generated by Qt Designer, so you will have to use pyuic and regenerate the file, I will assume that the generated file is called gui.py.
Keep in mind that the translation process is very time consuming so it could crash the GUI so you will have to run it in another thread. Another problem in your code is that the detect method does not return the language but an object of the Detected class that has the language information.
Considering the above, the solution is:
main.py
import sys
import threading
from PyQt5 import QtCore, QtGui, QtWidgets
from googletrans import Translator
from gui import Ui_MainWindow
class WorkerTranslator(QtCore.QObject):
translateSignal = QtCore.pyqtSignal(str)
def translate(self, text, dst_lang):
threading.Thread(
target=self._translate, args=(text, dst_lang), daemon=True
).start()
def _translate(self, text, dst_lang):
translator = Translator()
src_lang = translator.detect(text).lang
translated = translator.translate(text, src=src_lang, dest=dst_lang)
self.translateSignal.emit(translated.text)
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
self.pushButton.clicked.connect(self.translate)
self.translator = WorkerTranslator()
self.translator.translateSignal.connect(self.lineEdit_2.setText)
#QtCore.pyqtSlot()
def translate(self):
text = self.lineEdit.text()
dst_lang = self.comboBox.currentText()
self.translator.translate(text, dst_lang)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
├── gui.py
└── main.py
Related
LOGIN.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_LOGIN_PAGE(object):
def setupUi(self, LOGIN_PAGE):
LOGIN_PAGE.setObjectName("LOGIN_PAGE")
LOGIN_PAGE.resize(1909, 995)
self.centralwidget = QtWidgets.QWidget(LOGIN_PAGE)
self.centralwidget.setObjectName("centralwidget")
self.frame = QtWidgets.QFrame(self.centralwidget)
self.frame.setGeometry(QtCore.QRect(690, 220, 501, 571))
font = QtGui.QFont()
font.setFamily("Cambria Math")
font.setPointSize(11)
self.frame.setFont(font)
self.frame.setStyleSheet("QFrame{\n""background:rgb(255, 250, 175);\n""border-radius:30px;\n"
"}\n""\n""QLineEdit{\n""border-radius:10px;\n""}\n""\n""QPushButton{\n""background:#03a9f4;\n"
"border-radius:10px;}")
self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame.setObjectName("frame")
self.pushButton = QtWidgets.QPushButton(self.frame)
self.pushButton.setGeometry(QtCore.QRect(30, 360, 441, 81))
font = QtGui.QFont()
font.setFamily("Cambria")
font.setPointSize(14)
font.setBold(True)
font.setWeight(75)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
self.pushButton_2 = QtWidgets.QPushButton(self.frame)
self.pushButton_2.setGeometry(QtCore.QRect(130, 480, 241, 41))
font = QtGui.QFont()
font.setFamily("Gill Sans MT")
font.setPointSize(10)
self.pushButton_2.setFont(font)
self.pushButton_2.setObjectName("pushButton_2")
self.lineEdit = QtWidgets.QLineEdit(self.frame)
self.lineEdit.setGeometry(QtCore.QRect(30, 260, 441, 51))
font = QtGui.QFont()
font.setFamily("Cambria Math")
font.setPointSize(12)
self.lineEdit.setFont(font)
self.lineEdit.setText("")
self.lineEdit.setEchoMode(QtWidgets.QLineEdit.Password)
self.lineEdit.setObjectName("lineEdit")
self.lineEdit_2 = QtWidgets.QLineEdit(self.frame)
self.lineEdit_2.setGeometry(QtCore.QRect(30, 110, 441, 51))
font = QtGui.QFont()
font.setFamily("Cambria Math")
font.setPointSize(12)
self.lineEdit_2.setFont(font)
self.lineEdit_2.setText("")
self.lineEdit_2.setObjectName("lineEdit_2")
self.label = QtWidgets.QLabel(self.frame)
self.label.setGeometry(QtCore.QRect(40, 60, 231, 41))
font = QtGui.QFont()
font.setFamily("Cambria Math")
font.setPointSize(11)
self.label.setFont(font)
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.frame)
self.label_2.setGeometry(QtCore.QRect(40, 210, 231, 41))
font = QtGui.QFont()
font.setFamily("Cambria Math")
font.setPointSize(11)
self.label_2.setFont(font)
self.label_2.setObjectName("label_2")
LOGIN_PAGE.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(LOGIN_PAGE)
self.statusbar.setObjectName("statusbar")
LOGIN_PAGE.setStatusBar(self.statusbar)
self.retranslateUi(LOGIN_PAGE)
QtCore.QMetaObject.connectSlotsByName(LOGIN_PAGE)
def retranslateUi(self, LOGIN_PAGE):
_translate = QtCore.QCoreApplication.translate
LOGIN_PAGE.setWindowTitle(_translate("LOGIN_PAGE", "MainWindow"))
self.pushButton.setText(_translate("LOGIN_PAGE", "LOGIN"))
self.pushButton_2.setText(_translate("LOGIN_PAGE", "Forget Password"))
self.lineEdit.setPlaceholderText(_translate("LOGIN_PAGE", "PASSWORD"))
self.lineEdit_2.setPlaceholderText(_translate("LOGIN_PAGE", "USERNAME"))
self.label.setText(_translate("LOGIN_PAGE", "USERNAME :"))
self.label_2.setText(_translate("LOGIN_PAGE", "PASSWORD :"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
LOGIN_PAGE = QtWidgets.QMainWindow()
ui = Ui_LOGIN_PAGE()
ui.setupUi(LOGIN_PAGE)
LOGIN_PAGE.show()
sys.exit(app.exec_())
LOGINCLICK.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(505, 256)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.frame = QtWidgets.QFrame(self.centralwidget)
self.frame.setGeometry(QtCore.QRect(-1, -1, 501, 251))
self.frame.setStyleSheet("QFrame{\n""background:rgb(248, 255, 185);}\n""\n""QPushButton{\n"
"background:#03a9f4;\n""border-radius:10px;}")
self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame.setObjectName("frame")
self.pushButton1 = QtWidgets.QPushButton(self.frame)
self.pushButton1.setGeometry(QtCore.QRect(70, 90, 151, 51))
self.pushButton1.setObjectName("pushButton1")
self.pushButton1_2 = QtWidgets.QPushButton(self.frame)
self.pushButton1_2.setGeometry(QtCore.QRect(280, 90, 151, 51))
self.pushButton1_2.setObjectName("pushButton1_2")
MainWindow.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton1.setText(_translate("MainWindow", "LOGIN"))
self.pushButton1_2.setText(_translate("MainWindow", "REGISTRATION"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
How to switch from LOGINCLICK.py to LOGIN.py by clicking a button?
First of all, and this is more a matter of concept, you're not going to "switch" between those files, but between the instances of the classes that are in those files.
Second, you should create a file that acts as a "main" script, which is the file that you'll actually run from python; this is a general rule for programs that use multiple files as "modules", and is almost mandatory for PyQt when using files generated by pyuic; note that you should also never modify the contents of those files, but import them as python modules (read more about using Designer).
Recreate the files with pyuic, then create a new file that will look like this:
from PyQt5 import QtWidgets
from LOGINCLICK import Ui_MainWindow
from LOGIN import Ui_LOGIN_PAGE
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
super().__init__()
self.setupUi(self)
self.pushButton1.clicked.connect(self.showLogin)
def showLogin(self):
self.loginWindow = LoginWindow()
self.loginWindow.show()
class LoginWindow(QtWidgets.QMainWindow, Ui_LOGIN_PAGE):
def __init__(self):
super().__init__()
self.setupUi(self)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
mainWindow = MainWindow()
mainWindow.show()
sys.exit(app.exec_())
Now, some suggestions:
avoid fixed geometries in any case, and use layout managers instead (like QGridLayout, QHBoxLayout or QVBoxLayout) so that the contents of the windows will always adjust to the available size, otherwise some of the widgets might become unaccessible if the user resizes the window to a smaller size than you decided (there are also other reasons for this, but this is the most important);
don't use uppercase names for files or variables; read more about naming conventions in the Style Guide for Python Code;
a login window should probably be "modal" (shown over the current windows and avoiding interaction with them until the login window is closed); you can use a QDialog for this: from Designer create a new empty dialog, copy the elements of your current login form and paste them to the new dialog (or select all of them and use ctrl+drag), save and generate the file with pyuic, then change the above code considering the following modifications:
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
#...
def showLogin(self):
self.loginWindow = LoginWindow(self)
self.loginWindow.exec_()
class LoginWindow(QtWidgets.QDialog, Ui_LOGIN_PAGE):
def __init__(self, parent=None):
super().__init__()
self.setupUi(self)
Hello dear Users of stackoverflow
Introduction:
I am kind of new to Python and want to build a touch GUI for my Raspberry Pi with PyQt5. Therefore, I use the QtDesigner to build up .ui files on Windows 7. After that, the files are translated to .py files using "pyuic5 -x file.ui -o file.py" in the LXTerminal of the Pi.
My GUI:
I need to build up one output window (MainWindow) with a label and a push button, which opens up another window (I chose Dialog) for input. The input window has a spin box to set the value and a horizontal slider for bigger value steps. At the bottom of the window is a push button, which sets the spin box value as global variable and closes the Input window again.
The problem:
I want the push button of the input window that closes this window to also refresh the output label of the MainWindow, so that it shows the new value.
Pictures:
I am not allowed to embed Pictures of my GUI yet, so please see the following links.
MainWindow
InputWindow
InputWindow with Connections between slider and spin box
My Code:
The following code is a simple example and has everything working except the refresh of the Label. Please help me to get this work, even if it might be very simple for advanced and professional developers. I spent days on trying and googling for this and got lots of more complicated things working.
Best wishes,
RaspiManu
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets
value = 0
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(890, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(180, 100, 500, 250))
font = QtGui.QFont()
font.setPointSize(20)
self.label.setFont(font)
self.label.setStyleSheet("background-color: rgb(255, 255, 255);")
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(180, 370, 500, 100))
font = QtGui.QFont()
font.setPointSize(15)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
############
self.pushButton.clicked.connect(self.OpenInput)
############
MainWindow.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label.setText(_translate("MainWindow", "Value"))
self.pushButton.setText(_translate("MainWindow", "Go to input window"))
##############################
# Show second window for input
def OpenInput(self, MainWindow):
Dialog.show()
##############################
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(889, 598)
self.spinBox = QtWidgets.QSpinBox(Dialog)
self.spinBox.setGeometry(QtCore.QRect(210, 170, 471, 141))
font = QtGui.QFont()
font.setPointSize(33)
self.spinBox.setFont(font)
self.spinBox.setAlignment(QtCore.Qt.AlignCenter)
self.spinBox.setObjectName("spinBox")
self.horizontalSlider = QtWidgets.QSlider(Dialog)
self.horizontalSlider.setGeometry(QtCore.QRect(209, 360, 471, 61))
self.horizontalSlider.setOrientation(QtCore.Qt.Horizontal)
self.horizontalSlider.setObjectName("horizontalSlider")
self.pushButton = QtWidgets.QPushButton(Dialog)
self.pushButton.setGeometry(QtCore.QRect(310, 460, 271, 71))
font = QtGui.QFont()
font.setPointSize(13)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
############
self.pushButton.clicked.connect(self.CloseAndRefresh)
############
self.label = QtWidgets.QLabel(Dialog)
self.label.setGeometry(QtCore.QRect(210, 40, 471, 91))
font = QtGui.QFont()
font.setPointSize(24)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.retranslateUi(Dialog)
self.horizontalSlider.valueChanged['int'].connect(self.spinBox.setValue)
self.spinBox.valueChanged['int'].connect(self.horizontalSlider.setValue)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.pushButton.setText(_translate("Dialog", "Back to first Window"))
self.label.setText(_translate("Dialog", "Value"))
#######################################################
# Close second window and refresh label on first window
def CloseAndRefresh(self):
global value
value = self.spinBox.value()
print(value) #checking input
##################################################
# The refresh of the outputting label on the #
# MainWindow should be started at this position. #
##################################################
Dialog.close()
#######################################################
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
Dialog = QtWidgets.QDialog()
dia = Ui_Dialog()
dia.setupUi(Dialog)
sys.exit(app.exec_())
Try it:
from PyQt5 import QtCore, QtGui, QtWidgets
value = 0
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(890, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(180, 100, 500, 250))
font = QtGui.QFont()
font.setPointSize(20)
self.label.setFont(font)
self.label.setStyleSheet("background-color: rgb(255, 255, 255);")
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(180, 370, 500, 100))
font = QtGui.QFont()
font.setPointSize(15)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
############
self.pushButton.clicked.connect(self.OpenInput)
############
MainWindow.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label.setText(_translate("MainWindow", "Value"))
self.pushButton.setText(_translate("MainWindow", "Go to input window"))
##############################
# Show second window for input
def OpenInput(self, MainWindow):
Dialog.show()
##############################
# +++
def labelText(self, MainWindow, value):
self.label.setText(str(value))
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(889, 598)
self.spinBox = QtWidgets.QSpinBox(Dialog)
self.spinBox.setGeometry(QtCore.QRect(210, 170, 471, 141))
font = QtGui.QFont()
font.setPointSize(33)
self.spinBox.setFont(font)
self.spinBox.setAlignment(QtCore.Qt.AlignCenter)
self.spinBox.setObjectName("spinBox")
self.horizontalSlider = QtWidgets.QSlider(Dialog)
self.horizontalSlider.setGeometry(QtCore.QRect(209, 360, 471, 61))
self.horizontalSlider.setOrientation(QtCore.Qt.Horizontal)
self.horizontalSlider.setObjectName("horizontalSlider")
self.pushButton = QtWidgets.QPushButton(Dialog)
self.pushButton.setGeometry(QtCore.QRect(310, 460, 271, 71))
font = QtGui.QFont()
font.setPointSize(13)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
############
self.pushButton.clicked.connect(self.CloseAndRefresh)
############
self.label = QtWidgets.QLabel(Dialog)
self.label.setGeometry(QtCore.QRect(210, 40, 471, 91))
font = QtGui.QFont()
font.setPointSize(24)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.retranslateUi(Dialog)
self.horizontalSlider.valueChanged['int'].connect(self.spinBox.setValue)
self.spinBox.valueChanged['int'].connect(self.horizontalSlider.setValue)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.pushButton.setText(_translate("Dialog", "Back to first Window"))
self.label.setText(_translate("Dialog", "Value"))
#######################################################
# Close second window and refresh label on first window
def CloseAndRefresh(self):
global value
value = self.spinBox.value()
print(value) #checking input
# +++
ui.labelText(MainWindow, value)
##################################################
# The refresh of the outputting label on the #
# MainWindow should be started at this position. #
##################################################
Dialog.close()
#######################################################
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
Dialog = QtWidgets.QDialog()
dia = Ui_Dialog()
dia.setupUi(Dialog)
sys.exit(app.exec_())
I have 2 class files login-form.py and welcome.py
In login-form.py,authentication of user in performed with sqlite3 database.
Code for login-form.py
from PyQt5 import QtCore, QtGui, QtWidgets
from welcome import Ui_MainWindow
import sqlite3
class Ui_Dialog2(object):
def login_check(self):
uname = self.U_name_text.text()
passw = self.pass_text.text()
connection = sqlite3.connect("login.db")
result = connection.execute("SELECT * FROM USERS WHERE USERNAME = ? AND PASSWORD = ?", (uname, passw))
if (len(result.fetchall()) > 0):
print("Login success")
self.welcomewindow = QtWidgets.QMainWindow()
self.ui = Ui_MainWindow()
self.ui.setupUi(self.welcomewindow)
Dialog.hide()
self.welcomewindow.show()
else:
print("invalid login")
def setupUi2(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(301, 386)
Dialog.setStyleSheet("QDialog{\n"
"background-color: rgb(167, 210, 255);\n"
"}\n"
"QPushButton{\n"
"background-color: rgb(255, 255, 255);\n"
"border:none;\n"
"}\n"
"QLabel{\n"
"color:rgb(255, 23, 54);\n"
"font-size:20px;\n"
"}")
self.U_name_Lable = QtWidgets.QLabel(Dialog)
self.U_name_Lable.setGeometry(QtCore.QRect(20, 110, 111, 21))
self.U_name_Lable.setObjectName("U_name_Lable")
self.Pass_Lable = QtWidgets.QLabel(Dialog)
self.Pass_Lable.setGeometry(QtCore.QRect(20, 150, 111, 21))
self.Pass_Lable.setObjectName("Pass_Lable")
self.label = QtWidgets.QLabel(Dialog)
self.label.setGeometry(QtCore.QRect(60, 30, 201, 31))
font = QtGui.QFont()
font.setPointSize(-1)
self.label.setFont(font)
self.label.setStyleSheet("QLabel#label{\n"
"font-size:30px;\n"
"}")
self.label.setObjectName("label")
self.pass_text = QtWidgets.QLineEdit(Dialog)
self.pass_text.setGeometry(QtCore.QRect(140, 150, 131, 20))
self.pass_text.setObjectName("pass_text")
self.login_button = QtWidgets.QPushButton(Dialog)
self.login_button.setGeometry(QtCore.QRect(140, 190, 61, 23))
self.login_button.setObjectName("login_button")
##############button event################
self.login_button.clicked.connect(self.login_check)
##########################################
self.sighup_button = QtWidgets.QPushButton(Dialog)
self.sighup_button.setGeometry(QtCore.QRect(210, 190, 61, 23))
self.sighup_button.setObjectName("sighup_button")
self.U_name_text = QtWidgets.QLineEdit(Dialog)
self.U_name_text.setGeometry(QtCore.QRect(140, 110, 131, 20))
self.U_name_text.setStyleSheet("")
self.U_name_text.setObjectName("U_name_text")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.U_name_Lable.setText(_translate("Dialog", "USER NAME"))
self.Pass_Lable.setText(_translate("Dialog", "PASSWORD"))
self.label.setText(_translate("Dialog", "LOGIN FORM"))
self.login_button.setText(_translate("Dialog", "Login"))
self.sighup_button.setText(_translate("Dialog", "Sign-up"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = Ui_Dialog2()
ui.setupUi2(Dialog)
Dialog.show()
sys.exit(app.exec_())
After login i want to display username in QlineEdit in welcome.py file
code for welcome.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(220, 90, 151, 61))
font = QtGui.QFont()
font.setFamily("Times New Roman")
font.setPointSize(28)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(20, 300, 551, 61))
self.lineEdit = QtWidgets.QLineEdit(MainWindow)
self.lineEdit.setGeometry(QtCore.QRect(130, 220, 113, 20))
self.lineEdit.setObjectName("lineEdit")
font = QtGui.QFont()
font.setFamily("Times New Roman")
font.setPointSize(28)
font.setBold(True)
font.setWeight(75)
self.label_2.setFont(font)
self.label_2.setObjectName("label_2")
MainWindow.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label.setText(_translate("MainWindow", "Welcome"))
self.label_2.setText(_translate("MainWindow", "Good Morning "))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
I am new to python GUI i dont know how to fetch value from one form to another.
The way you are implementing the solution is not scalable, it will give you many headaches. Qt Designer recommends not to modify the classes or the files that it generates since for example you want to change the color of a window, add some widgets, you will have to rewrite all the logic and that is time and money wasted.
The classes generated by Qt Designer are not widgets, but are classes used to fill a widget.
What you should do is create another file that takes care of the logic and use the classes generated by Qt Designer.
In this case, you must eliminate the changes to the .py files generated using Qt Designer.
Recommendation: use appropriate names for the files, do not use -, since these files can be imported by another file and if you do not comply with the rules of python syntax you will have problems. So change the name of login-form.py to login_form.py.
You must create a new file that will call main.py and in it handle the logic, as it is a QDialog the login will use exec_() instead of show(), and verify that it is called to accept() by the result that returns.
import sqlite3
from PyQt5 import QtCore, QtGui, QtWidgets
from login_form import Ui_Dialog2
from welcome import Ui_MainWindow
class LoginDialog(QtWidgets.QDialog, Ui_Dialog2):
def __init__(self, *args, **kwargs):
QtWidgets.QDialog.__init__(self, *args, **kwargs)
self.setupUi(self)
self.login_button.clicked.connect(self.login_check)
def login_check(self):
uname = self.U_name_text.text()
passw = self.pass_text.text()
connection = sqlite3.connect("login.db")
result = connection.execute("SELECT * FROM USERS WHERE USERNAME = ? AND PASSWORD = ?", (uname, passw))
if result.fetchall():
self.accept()
else:
print("invalid login")
class WelcomeWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, *args, **kwargs):
QtWidgets.QMainWindow.__init__(self, *args, **kwargs)
self.setupUi(self)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
login = LoginDialog()
w = WelcomeWindow()
if login.exec_() == QtWidgets.QDialog.Accepted:
username = login.U_name_text.text()
w.lineEdit.setText(username)
w.show()
sys.exit(app.exec_())
The complete example can be found in the following link.
I used Qt Designer to design a GUI and use the command in PyQt5 to convert the .ui file to .py. From that, I want to output a messagebox when a button is clicked. I have successfully done it using this line of code on the function of the button listener:
QtWidgets.QMessageBox.about(MainWindow, "Result", "Invalid number entered!")
I have searched around the internet but I don't understand why this one don't work.
QtWidgets.QMessageBox.about(self, "Result", "Invalid number entered!")
Does the self their refer to the MainWindow also?
Here is the full source code.
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setWindowModality(QtCore.Qt.WindowModal)
#MainWindow.resize(310, 185)
MainWindow.setFixedSize(310, 185)
MainWindow.setStyleSheet("#MainWindow\n"
"{\n"
" background-color:qradialgradient(spread:pad, cx:0.5, cy:0.5,
radius:1.696, fx:0.5, fy:0.505682, stop:0 rgba(0, 85, 255, 255), stop:1
rgba(255, 255, 255, 255))\n"
"}\n"
"\n"
"#firstNo_lineedit, #secondNo_lineedit\n"
"{\n"
" \n"
" background-color: rgb(28, 255, 123);\n"
"}\n"
"\n"
"")
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.firstNo_lineedit = QtWidgets.QLineEdit(self.centralwidget)
self.firstNo_lineedit.setGeometry(QtCore.QRect(130, 40, 113, 20))
self.firstNo_lineedit.setObjectName("firstNo_lineedit")
self.secondNo_lineedit = QtWidgets.QLineEdit(self.centralwidget)
self.secondNo_lineedit.setGeometry(QtCore.QRect(130, 70, 113, 20))
self.secondNo_lineedit.setObjectName("secondNo_lineedit")
self.calculate_button = QtWidgets.QPushButton(self.centralwidget)
self.calculate_button.setGeometry(QtCore.QRect(170, 100, 75, 23))
self.calculate_button.setObjectName("calculate_button")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(60, 40, 81, 20))
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(60, 70, 61, 20))
self.label_2.setObjectName("label_2")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 310, 21))
self.menubar.setObjectName("menubar")
self.menuAbout = QtWidgets.QMenu(self.menubar)
self.menuAbout.setObjectName("menuAbout")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.menubar.addAction(self.menuAbout.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
# ================= Listeners ===================
self.calculate_button.clicked.connect(self.basicArithmetic)
# ============================================
# ================= Events ===================
def basicArithmetic(self):
try:
firstNo=float(self.firstNo_lineedit.text())
secondNo=float(self.secondNo_lineedit.text())
resSum=firstNo+secondNo
resDiff=firstNo-secondNo
resMul=firstNo*secondNo
resDiv=round(firstNo/secondNo,2)
print("Sum: {}".format(resSum))
print("Difference: {}".format(resDiff))
print("Product: {}".format(resMul))
print("Quotient: {}".format(resDiv))
toDisplay="Sum: {}".format(resSum)
toDisplay+="\n"
toDisplay+="Difference: {}".format(resDiff)
toDisplay+="\n"
toDisplay+="Product: {}".format(resMul)
toDisplay+="\n"
toDisplay+="Quotient: {}".format(resDiv)
#QtWidgets.QMessageBox.about(self, "Result", toDisplay)
QtWidgets.QMessageBox.about(MainWindow, "Result", toDisplay)
except ValueError:
#QtWidgets.QMessageBox.about(self, "Result", toDisplay)
QtWidgets.QMessageBox.about(MainWindow, "Result", "Invalid number entered!")
# ============================================
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.calculate_button.setText(_translate("MainWindow", "Calculate"))
self.label.setText(_translate("MainWindow", "First No.:"))
self.label_2.setText(_translate("MainWindow", "Second No.:"))
self.menuAbout.setTitle(_translate("MainWindow", "About"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
self is the first parameter of the methods (the name is by convention, is not mandatory) of a class that refers to the instance of the same.
For another QMessageBox.about() requires as first parameter an object of some kind that inherits from QWidget or also None.
If we review the class generated by Qt Designer, we clearly see that it is not a widget, in fact the only objective of that class is to be an interface to fill in another widget:
MainWindow = QtWidgets.QMainWindow() # create widget
ui = Ui_MainWindow() # create interface
ui.setupUi(MainWindow) # fill widget
Therefore the self, the instance of Ui_MainWindow, you want to pass is not appropriate because it does not refer to the widget, but the MainWindow is a widget, so it works correctly with that change.
Also within the generated file you have the following message:
# WARNING! All changes made in this file will be lost!
That message is because if you want to change the design you will have to overwrite the logic that you wrote, such as your basicArithmetic method, which makes the project untenable.
PyQt I recommend to create another class that uses the class that generates QtDesigner, I assume that the generated file is called design.py
design.py:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'design.ui'
#
# Created by: PyQt5 UI code generator 5.10.1
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setWindowModality(QtCore.Qt.WindowModal)
#MainWindow.resize(310, 185)
MainWindow.setFixedSize(310, 185)
MainWindow.setStyleSheet("#MainWindow\n"
"{\n"
" background-color:qradialgradient(spread:pad, cx:0.5, cy:0.5,"
"radius:1.696, fx:0.5, fy:0.505682, stop:0 rgba(0, 85, 255, 255), stop:1"
"rgba(255, 255, 255, 255))\n"
"}\n"
"\n"
"#firstNo_lineedit, #secondNo_lineedit\n"
"{\n"
" \n"
" background-color: rgb(28, 255, 123);\n"
"}\n"
"\n"
"")
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.firstNo_lineedit = QtWidgets.QLineEdit(self.centralwidget)
self.firstNo_lineedit.setGeometry(QtCore.QRect(130, 40, 113, 20))
self.firstNo_lineedit.setObjectName("firstNo_lineedit")
self.secondNo_lineedit = QtWidgets.QLineEdit(self.centralwidget)
self.secondNo_lineedit.setGeometry(QtCore.QRect(130, 70, 113, 20))
self.secondNo_lineedit.setObjectName("secondNo_lineedit")
self.calculate_button = QtWidgets.QPushButton(self.centralwidget)
self.calculate_button.setGeometry(QtCore.QRect(170, 100, 75, 23))
self.calculate_button.setObjectName("calculate_button")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(60, 40, 81, 20))
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(60, 70, 61, 20))
self.label_2.setObjectName("label_2")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 310, 21))
self.menubar.setObjectName("menubar")
self.menuAbout = QtWidgets.QMenu(self.menubar)
self.menuAbout.setObjectName("menuAbout")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.menubar.addAction(self.menuAbout.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.calculate_button.setText(_translate("MainWindow", "Calculate"))
self.label.setText(_translate("MainWindow", "First No.:"))
self.label_2.setText(_translate("MainWindow", "Second No.:"))
self.menuAbout.setTitle(_translate("MainWindow", "About"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
This new class can have the following form:
main.py:
from PyQt5 import QtCore, QtGui, QtWidgets
from design import Ui_MainWindow
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, *args, **kwargs):
QtWidgets.QMainWindow.__init__(self, *args, **kwargs)
self.setupUi(self)
# ================= Listeners ===================
self.calculate_button.clicked.connect(self.basicArithmetic)
# ============================================
# ================= Events ===================
def basicArithmetic(self):
try:
firstNo=float(self.firstNo_lineedit.text())
secondNo=float(self.secondNo_lineedit.text())
resSum=firstNo+secondNo
resDiff=firstNo-secondNo
resMul=firstNo*secondNo
resDiv=round(firstNo/secondNo,2)
print("Sum: {}".format(resSum))
print("Difference: {}".format(resDiff))
print("Product: {}".format(resMul))
print("Quotient: {}".format(resDiv))
toDisplay="Sum: {}".format(resSum)
toDisplay+="\n"
toDisplay+="Difference: {}".format(resDiff)
toDisplay+="\n"
toDisplay+="Product: {}".format(resMul)
toDisplay+="\n"
toDisplay+="Quotient: {}".format(resDiv)
#QtWidgets.QMessageBox.about(self, "Result", toDisplay)
QtWidgets.QMessageBox.about(self, "Result", toDisplay)
except ValueError:
#QtWidgets.QMessageBox.about(self, "Result", toDisplay)
QtWidgets.QMessageBox.about(self, "Result", "Invalid number entered!")
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
And that is the reason why, in many cases, self is seen as the first parameter.
You can find more information at the following link:
http://pyqt.sourceforge.net/Docs/PyQt5/designer.html
No self refers to Ui_MainWindowclass where MainWindow reffers to QtWidgets.QMainWindow()
So when you say QtWidgets.QMessageBox.about(self, "Result", toDisplay) it will treat Ui_MainWindow as a parent QWidget which is not correct.
when you call QtWidgets.QMessageBox.about(MainWindow, "Result", toDisplay) this time your code will run fine because MainWindow is a valid QWidget i.e QtWidgets.QMainWindow()
hope this helps.
I am writing a Python Programm that mainly consists of Data organized in a Python object and I want to write a GUI using PyQt for it.
Since I want to be able to use the Python part without the GUI as well, I don't want Qt code in my Data structure. Qt encourages you to separate the data model from the GUI/View part of the program, so I thought this approach should be fairly common in PyQt. However I don't understand how the Data is to be connected and kept persistent with the GUI.
I think I understand the model/view concept - but it seems to me that the model in Qt terms is a Qt object as well and would need to be kept in sync with my pure python object so I don't see the point of it.
I guess there is still something crucial that I don't understand yet. Can anyone give me a hint?
Update 1:
Following Armatita's comment I give the following minimal example:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
#Python Data:
class car:
def __init__(self, name, color):
self.name = name
self.color = color
#Window:
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(650, 510, 75, 23))
self.pushButton.setObjectName("pushButton")
self.treeView = QtWidgets.QTreeView(self.centralwidget)
self.treeView.setGeometry(QtCore.QRect(30, 20, 591, 481))
self.treeView.setObjectName("treeView")
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(680, 120, 113, 20))
self.lineEdit.setObjectName("lineEdit")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(630, 120, 46, 13))
self.label.setObjectName("label")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "Apply"))
self.label.setText(_translate("MainWindow", "Value"))
if __name__ == "__main__":
#create Data
blue_car = car("family_car", "blue")
red_car = car("sports_car", "red")
#open UI
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
#now I would like to show the cars and their properties (name, color) in the treeview...
In this Example I would like to show the cars I created in the tree view Widget and manipulate them with the input field an the apply button.
There are typically two types of interfaces to widgets in Qt. One is the view version, the other is the widget version (which inherits the view). The easiest to use is the widget version, and for what you seem to be trying to do it is what I recommend.
Also, although its possible to software the way you were doing it is generally better to follow the more common conventions. I've adapted your code (including the way you build the MainWindow) to have the small GUI working with a new method (addCar) to add your car class information to the QTreeWidget:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
#Python Data:
class car:
def __init__(self, name, color):
self.name = name
self.color = color
#Window:
class Ui_MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super(Ui_MainWindow, self).__init__()
self.setupUi()
def setupUi(self):
self.setObjectName("MainWindow")
self.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(self)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(650, 510, 75, 23))
self.pushButton.setObjectName("pushButton")
# self.treeView = QtWidgets.QTreeView(self.centralwidget)
self.treeView = QtWidgets.QTreeWidget(self.centralwidget)
self.treeView.setColumnCount(1)
self.treeView.setGeometry(QtCore.QRect(30, 20, 591, 481))
self.treeView.setObjectName("treeView")
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(680, 120, 113, 20))
self.lineEdit.setObjectName("lineEdit")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(630, 120, 46, 13))
self.label.setObjectName("label")
self.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(self)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
self.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(self)
self.statusbar.setObjectName("statusbar")
self.setStatusBar(self.statusbar)
self.retranslateUi()
QtCore.QMetaObject.connectSlotsByName(self)
def addCar(self, car, name):
item = QtWidgets.QTreeWidgetItem([name])
child1 = QtWidgets.QTreeWidgetItem(["Type: " + car.name])
child2 = QtWidgets.QTreeWidgetItem(["Type: " + car.color])
item.addChild(child1)
item.addChild(child2)
self.treeView.addTopLevelItem(item)
def retranslateUi(self):
_translate = QtCore.QCoreApplication.translate
self.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "Apply"))
self.label.setText(_translate("MainWindow", "Value"))
if __name__ == "__main__":
#create Data
blue_car = car("family_car", "blue")
red_car = car("sports_car", "red")
#open UI
app = QtWidgets.QApplication(sys.argv)
# MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
# ui.setupUi(MainWindow)
# Add car object
ui.addCar(blue_car, "Blue Car")
ui.addCar(red_car, "Red Car")
ui.show()
sys.exit(app.exec_())
The result is this:
Also I recommend you try checking out an online quick tutorial for pyQt5 (arbitrary example: zetcode) since if you start building software now using the methodology it seems to me you were trying to apply you'll end up re-writing most of it in the future (I think...). I've made the same mistake in the past.