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.
Related
I want to add Qlabels on runtime by clicking the pushbutton.
For example, I want to add "Helloworld" text label each time the button is clicked.
I have written code but it replaces not add Qlabel in scrollArea, I want to add "Helloworld" in the scrollArea each time the pushbutton is pressed. Secondly, I have created the Qlabel label_99 on runtime, But I think this will not work. As
multiple Qlabels must be created on runtime, as I want to add Qlabel each time I click a pushbutton.
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'test.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# 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.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.scrollArea = QtWidgets.QScrollArea(self.centralwidget)
self.scrollArea.setGeometry(QtCore.QRect(130, 80, 221, 301))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.scrollArea.sizePolicy().hasHeightForWidth())
self.scrollArea.setSizePolicy(sizePolicy)
self.scrollArea.setWidgetResizable(True)
self.scrollArea.setObjectName("scrollArea")
self.scrollAreaWidgetContents = QtWidgets.QWidget()
self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 219, 299))
self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents")
self.verticalLayout = QtWidgets.QVBoxLayout(self.scrollAreaWidgetContents)
self.verticalLayout.setObjectName("verticalLayout")
self.label = QtWidgets.QLabel(self.scrollAreaWidgetContents)
self.label.setObjectName("label")
self.verticalLayout.addWidget(self.label)
self.label_2 = QtWidgets.QLabel(self.scrollAreaWidgetContents)
self.label_2.setObjectName("label_2")
self.verticalLayout.addWidget(self.label_2)
self.label_3 = QtWidgets.QLabel(self.scrollAreaWidgetContents)
self.label_3.setObjectName("label_3")
self.verticalLayout.addWidget(self.label_3)
self.label_4 = QtWidgets.QLabel(self.scrollAreaWidgetContents)
self.label_4.setObjectName("label_4")
self.verticalLayout.addWidget(self.label_4)
self.scrollArea.setWidget(self.scrollAreaWidgetContents)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(390, 110, 89, 25))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.button_pressed)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
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.label.setText(_translate("MainWindow", "TextLabel"))
self.label_2.setText(_translate("MainWindow", "TextLabel"))
self.label_3.setText(_translate("MainWindow", "TextLabel"))
self.label_4.setText(_translate("MainWindow", "TextLabel"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
def button_pressed(self):
print("button pressed")
self.add_new_label()
def add_new_label(self):
self.label_99 = QtWidgets.QLabel()
label_99=QtWidgets.QLabel()
label_99.setText("HelloWorld")
self.scrollArea.setWidget(label_99)
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_())
setWidget sets the widget for the scroll are, and that is why the code you have doesn't work since it removes the previous widget from the scroll area, and sets the new label as the scroll area widget.
You need to create a new instance of QLabel, and add it to the layout of the scroll area widget, which is self.verticalLayout for the above class.
def add_new_label(self):
newLabel = QtWidgets.QLabel('Hello World')
self.verticalLayout.addWidget(newLabel)
The code to create new label and assign it class instance attribute as self.label_99 = QtWidgets.QLabel() is useless in your case. You just need to create a local variable to hold the label, and finally add it to the scroll area's widget's layout.
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)
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
I have made two GUIs in Pyqt5 & Qt Designer. The first GUI is to show the person name in a comboBox. The second GUI will be opend by clicking + button and then the user can write the name,age and job which i need later in other thing.
My Question is, how can i get the new name from the 2. GUI and set it in comboBox of the 1. GUI. I tried that in the below code but it doesn't work.
whole code:
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(363, 165)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(30, 30, 68, 19))
self.label.setObjectName("label")
self.comboBox = QtWidgets.QComboBox(self.centralwidget)
self.comboBox.setGeometry(QtCore.QRect(120, 30, 131, 25))
self.comboBox.setObjectName("comboBox")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(280, 30, 41, 34))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 363, 31))
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.label.setText(_translate("MainWindow", "person"))
self.pushButton.setText(_translate("MainWindow", "+"))
def InputDialog1(self):
self.Dialog = QtWidgets.QDialog()
self.ui=Ui_Dialog()
self.ui.setupUi(self.Dialog)
self.Dialog.setWindowTitle('Add Infos')
self.Dialog.show()
class Person_data(object):
def __init__(self,parent=None):
self.Person_1 = {'-':[0,0]}
class MainWindow(QMainWindow, Ui_MainWindow,Person_data):
def __init__(self, parent=None):
QMainWindow.__init__(self, parent=parent)
Person_data.__init__(self, parent=parent)
self.setupUi(self)
self.initMe()
def initMe(self):
self.pushButton.clicked.connect(self.InputDialog1)
Person_list={}
for i in self.Person_1.keys():
Person_list[i] = ''
Person_list_2 = list(Person_list)
print(Person_list_2)
self.comboBox.addItems(Person_list_2)
class Ui_Dialog(Person_data):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(344, 231)
self.pushButton = QtWidgets.QPushButton(Dialog)
self.pushButton.setGeometry(QtCore.QRect(170, 160, 112, 34))
self.pushButton.setObjectName("pushButton")
self.pushButton_2 = QtWidgets.QPushButton(Dialog)
self.pushButton_2.setGeometry(QtCore.QRect(30, 160, 112, 34))
self.pushButton_2.setObjectName("pushButton_2")
self.gridLayoutWidget = QtWidgets.QWidget(Dialog)
self.gridLayoutWidget.setGeometry(QtCore.QRect(30, 20, 271, 121))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0)
self.gridLayout.setObjectName("gridLayout")
self.lineEdit_2 = QtWidgets.QLineEdit(self.gridLayoutWidget)
self.lineEdit_2.setObjectName("lineEdit_2")
self.gridLayout.addWidget(self.lineEdit_2, 1, 1, 1, 1)
self.lineEdit = QtWidgets.QLineEdit(self.gridLayoutWidget)
self.lineEdit.setObjectName("lineEdit")
self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 1)
self.lineEdit_3 = QtWidgets.QLineEdit(self.gridLayoutWidget)
self.lineEdit_3.setObjectName("lineEdit_3")
self.gridLayout.addWidget(self.lineEdit_3, 2, 1, 1, 1)
self.label_2 = QtWidgets.QLabel(self.gridLayoutWidget)
self.label_2.setObjectName("label_2")
self.gridLayout.addWidget(self.label_2, 2, 0, 1, 1)
self.label_3 = QtWidgets.QLabel(self.gridLayoutWidget)
self.label_3.setObjectName("label_3")
self.gridLayout.addWidget(self.label_3, 1, 0, 1, 1)
self.label = QtWidgets.QLabel(self.gridLayoutWidget)
self.label.setObjectName("label")
self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
self.pushButton.clicked.connect(self.okpress)
self.pushButton_2.clicked.connect(Dialog.close)
def okpress(self):
aa1=float(self.lineEdit_2.text());aa2=float(self.lineEdit_3.text())
self.Person_1[str(self.lineEdit.text())] = [aa1,aa2]
i = True
while i == True:
bb = MainWindow()
Person_list={}
for i in self.Person_1.keys():
Person_list[i] = ''
Person_list_2 = list(Person_list)
print(Person_list_2)
bb.comboBox.addItems(Person_list_2)
i=False #just to exit while
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.pushButton.setText(_translate("Dialog", "add"))
self.pushButton_2.setText(_translate("Dialog", "Cancel"))
self.label_2.setText(_translate("Dialog", "Age"))
self.label_3.setText(_translate("Dialog", "Job"))
self.label.setText(_translate("Dialog", "Name"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.setWindowTitle('Main Person Windows')
w.show()
sys.exit(app.exec_())
It is not recommended that you modify the code generated by Qt Designer, since you can have unexpected behaviors, in addition to messing up the code. The appropriate thing from my perspective is to create classes that inherit from the appropriate widgets and that use the design of QtDesigner, so my answer includes the restructuring of the code to make it more readable.
Analyzing in your code I see that you confuse the inheritance with the idea of sharing data, when it is inherited from a class it creates similar but not equal elements in each class, even though each object of those classes create similar objects among them but they are not the same , are not the same variables so they point to different memory space, in your case you think that as Ui_Dialog and MainWindow inherit from Person_data, then the variables Person_1 in both classes are the same, and in reality it is not.
Another problem that your code has is the validation, one must try that the user places appropriate values and must interact with certain elements when necessary, for example the conversion to float can cause problems if the text is empty or is not a number, also the add button should only be enabled if all fields are filled in properly, for this Qt provides classes such as QIntValidator.
QDialog is a class specialized in forms and we should try as much as possible to use exec_() since it returns if the form is accepted or not, but for this you must use the accept and reject methods when the buttons are appropriate.
Code:
class PersonDialog(QtWidgets.QDialog, Ui_Dialog):
def __init__(self, *args, **kwargs):
QtWidgets.QDialog.__init__(self, *args, **kwargs)
self.setupUi(self)
self.pushButton.clicked.connect(self.accept)
self.pushButton_2.clicked.connect(self.reject)
self.lineEdit_3.setValidator(QtGui.QIntValidator(0, 100))
self.lineEdit.textChanged.connect(self.enableButtonAccept)
self.lineEdit_2.textChanged.connect(self.enableButtonAccept)
self.lineEdit_3.textChanged.connect(self.enableButtonAccept)
self.enableButtonAccept()
def enableButtonAccept(self):
if self.lineEdit.text() != "" and self.lineEdit_2.text() != "" and self.lineEdit_3.text() != "":
self.pushButton.setEnabled(True)
else:
self.pushButton.setEnabled(False)
def getPerson(self):
values = self.lineEdit.text(), self.lineEdit_2.text(), int(self.lineEdit_3.text())
self.lineEdit.clear()
self.lineEdit_2.clear()
self.lineEdit_3.clear()
return values
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, *args, **kwargs):
QtWidgets.QMainWindow.__init__(self, *args, **kwargs)
self.setupUi(self)
self.Person_1 = {}
self.initMe()
def initMe(self):
self.personDialog = PersonDialog(self)
self.pushButton.clicked.connect(self.InputDialog1)
def InputDialog1(self):
if self.personDialog.exec_() == PersonDialog.Accepted:
name, job, edad = self.personDialog.getPerson()
self.Person_1[name] = [job, edad]
self.comboBox.addItem(name)
I'm trying to make a lineEdit widget have place holder text (look like 'MM/DD/YYYY') when not in focus and have input masking (looks like ' / / ', or you can put in slashes through other means) when in focus.
Currently the input mask setInputMask('99/99/9999') takes precedence and I can't figure out a way to put a hasFocus (or similiar) signal on a LineEdit widget.
How would you implement both of these functionalities in one widget?
Would it be easier to leave the place holder text as is and create a method that adds in a slash after entering a certain number of characters?
Also, the flicking cursor is really thick when you set a mask. What's up with that and how do you revert it?
Full code:
from PySide import QtCore, QtGui
class Ui_MainWindow(object):
def myChanges(self):
self.lineEdit.installEventFilter(self.lineEdit.setInputMask('99/99/9999'))
self.lineEdit.setPlaceholderText('MM/DD/YYYY')
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(557, 351)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.lineEdit = QtGui.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(100, 130, 113, 20))
self.lineEdit.setObjectName("lineEdit")
self.lineEdit_2 = QtGui.QLineEdit(self.centralwidget)
self.lineEdit_2.setGeometry(QtCore.QRect(320, 130, 113, 20))
self.lineEdit_2.setObjectName("lineEdit_2")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 557, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtGui.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
self.myChanges()
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
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_())
If you want a custom behavior of a widget you must create a class that inherits from this, in your case of QLineEdit. To get your specific objective you must use the focusInEvent and focusOutEvent methods as described in the following section:
class LineEdit(QtGui.QLineEdit):
def __init__(self, parent=None):
QtGui.QLineEdit.__init__(self, parent=parent)
self.setPlaceholderText('MM/DD/YYYY')
def focusInEvent(self, event):
self.setInputMask('99/99/9999')
def focusOutEvent(self, event):
self.setInputMask('')
And then you should change to:
self.lineEdit = QtGui.QLineEdit(self.centralwidget)
to:
self.lineEdit = LineEdit(self.centralwidget)