We will see in this practical tutorial, how to create a mini PyQt5 application With Qt Designer which asks the user to enter an integer N and return its double 2 * N by clicking on the Validate button:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def action(self):
N = int(self.lineEdit.text())
N2 = 2*N
self.lineEdit_2.setText(str(N2))
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(400, 300)
self.label = QtWidgets.QLabel(Form)
self.label.setGeometry(QtCore.QRect(20, 30, 151, 31))
font = QtGui.QFont()
font.setPointSize(16)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setStyleSheet("color: rgb(0, 0, 255);")
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(Form)
self.label_2.setGeometry(QtCore.QRect(20, 80, 151, 31))
font = QtGui.QFont()
font.setPointSize(16)
font.setBold(True)
font.setWeight(75)
self.label_2.setFont(font)
self.label_2.setStyleSheet("color: rgb(0, 0, 255);")
self.label_2.setObjectName("label_2")
self.lineEdit = QtWidgets.QLineEdit(Form)
self.lineEdit.setGeometry(QtCore.QRect(170, 29, 191, 31))
font = QtGui.QFont()
font.setPointSize(16)
font.setBold(True)
font.setWeight(75)
self.lineEdit.setFont(font)
self.lineEdit.setStyleSheet("color: rgb(255, 0, 0);")
self.lineEdit.setObjectName("lineEdit")
self.lineEdit_2 = QtWidgets.QLineEdit(Form)
self.lineEdit_2.setGeometry(QtCore.QRect(170, 80, 191, 31))
font = QtGui.QFont()
font.setPointSize(16)
font.setBold(True)
font.setWeight(75)
self.lineEdit_2.setFont(font)
self.lineEdit_2.setStyleSheet("color: rgb(255, 0, 0);")
self.lineEdit_2.setObjectName("lineEdit_2")
self.pushButton = QtWidgets.QPushButton(Form)
self.pushButton.clicked.connect(self.action)
self.pushButton.setGeometry(QtCore.QRect(170, 132, 181, 31))
font = QtGui.QFont()
font.setPointSize(16)
font.setBold(True)
font.setWeight(75)
self.pushButton.setFont(font)
self.pushButton.setStyleSheet("background-color: rgb(255, 255, 0);")
self.pushButton.setObjectName("pushButton")
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Form"))
self.label.setText(_translate("Form", "Value Of N :"))
self.label_2.setText(_translate("Form", "Double 2*N :"))
self.pushButton.setText(_translate("Form", "Validate"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Form = QtWidgets.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
sys.exit(app.exec_())Younes Derfoufi
my-courses.net
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