In this article, we will see how we can create a dog year calculator using PyQt5. Dog year calculator will tell the age of a dog if the dog was human, the dog grew a lot faster than humans. Below is how the calculator will look like :
PyQt5 is a cross-platform GUI toolkit, a set of python bindings for Qt v5. One can develop an interactive desktop application with so much ease because of the tools and simplicity provided by this library. Below is the command to install the PyQt5
pip install PyQt5
GUI Implementation Steps :
- Create a heading label that displays the calculator name.
- Create a label to show users to enter the age of the dog.
- Create a QSpinBox object for the user to enter the years.
- Create push-button for calculating the age.
- Create a label to show the calculated age.
Back-End Implementation :
- Add an action to the push button.
- Set minimum and maximum values to the spin box.
- Inside the push button, an action gets the value of spin box.
- If the value is 1 then age is 15, if the value is 2 then age is 24 else age is increment by 4 for next years.
- Show the calculated age with the help of a label.
Below is the implementation
Python3
# importing required libraries from PyQt5.QtWidgets import * from PyQt5 import QtCore, QtGui from PyQt5.QtGui import * from PyQt5.QtCore import * import datetime import sys # window class class Window(QMainWindow): # Constructor def __init__(self): super().__init__() # setting title of the window self.setWindowTitle("Python ") # width of the window self.w_width = 400 # height of the window self.w_height = 400 # setting geometry of the window self.setGeometry(100, 100, self.w_width, self.w_height) # method calling self.UiComponents() # showing all the widgets self.show() # method for components creation def UiComponents(self): # creating head label head = QLabel("Dog Age Calculator", self) head.setWordWrap(True) # setting geometry of the head head.setGeometry(0, 10, 400, 60) # font work font = QFont('Times', 15) font.setBold(True) font.setItalic(True) font.setUnderline(True) # setting font to the head head.setFont(font) # setting alignment of the head head.setAlignment(Qt.AlignCenter) # setting color effect to the head color = QGraphicsColorizeEffect(self) color.setColor(Qt.darkCyan) head.setGraphicsEffect(color) # creating a label age_label = QLabel("Age of Dog ", self) # setting geometry to the label age_label.setGeometry(50, 120, 147, 40) # setting alignment age_label.setAlignment(Qt.AlignCenter) # setting stylesheet age_label.setStyleSheet("QLabel" "{" "border : 2px solid black;" "background : rgba(70, 70, 70, 35);" "}") age_label.setFont(QFont('Times', 9)) # creating a spin box self.age = QSpinBox(self) # setting geometry to the spin box self.age.setGeometry(203, 120, 147, 40) # setting maximum value of spin box self.age.setMaximum(20) # setting minimum value of spin box self.age.setMinimum(1) # setting suffix to the spin box self.age.setSuffix(" year(s)") # setting font and alignment self.age.setFont(QFont('Times', 9)) self.age.setAlignment(Qt.AlignCenter) # creating a push button calculate = QPushButton("Calculate Age", self) # setting geometry to the push button calculate.setGeometry(100, 200, 200, 40) # adding action to the button calculate.clicked.connect(self.calculate) # adding color effect to the push button color = QGraphicsColorizeEffect() color.setColor(Qt.blue) calculate.setGraphicsEffect(color) # creating a label to show result self.result = QLabel(self) # setting properties to result label self.result.setAlignment(Qt.AlignCenter) # setting geometry self.result.setGeometry(50, 280, 300, 70) # making it multi line self.result.setWordWrap(True) # setting stylesheet # adding border and background self.result.setStyleSheet("QLabel" "{" "border : 3px solid black;" "background : white;" "}") # setting font self.result.setFont(QFont('Arial', 11)) # method for calculating the dog's age def calculate(self): # getting the spin box value value = self.age.value() # if value is 1 if value == 1: # dog age is 15 d_age = 15 # if value is 2 elif value == 2: # dog age is 24 d_age = 24 # else dog age get incremented by 4 else: d_age = 24 + (value - 2) * 4 # showing age through label self.result.setText("If your dog were a human, it would be : " +str(d_age) + " years old !") # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
