In this article we will see how we can create a days from date calculator in PyQt5, days from date calculator is used to add or subtract the days from the selected date to get the new date. This calculator is used to get the exact date which would come after given number of days. Below is how the calculator will like
PyQt5 is 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 :
1. Create a heading label that display the calculator name
2. Create label to show user to select the date
3. Create a QCalendarWidget object for user to select the date
4. Create a label and spin box for telling user to enter days and get the days
5. Create two push buttons for adding and subtracting the days
6. Create a label to show the calculated dateBack-End Implementation :
1. Add action to both the push button
2. Inside the add push button action get the days and call the calculate method and pass days as argument
3. Inside the subtract push button action get the days and make the days negative and call the calculate method and pass days as argument
4. Inside the calculate method get the selected date of the calendar
5. Add the passed days to the selected date
6. Show the new date with the help of result label
Below is the implementation
# importing libraries from PyQt5.QtWidgets import * from PyQt5 import QtCore, QtGui from PyQt5.QtGui import * from PyQt5.QtCore import * import datetime import sys class Window(QMainWindow): def __init__(self): super().__init__() # setting title self.setWindowTitle("Python ") # width of window self.w_width = 400 # height of window self.w_height = 530 # setting geometry self.setGeometry(100, 100, self.w_width, self.w_height) # calling method self.UiComponents() # showing all the widgets self.show() # method for components def UiComponents(self): # creating head label head = QLabel("+/- Days from a date Calculator", self) head.setWordWrap(True) # setting geometry to the head head.setGeometry(0, 10, 400, 60) # font 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 b_label = QLabel("Select Date", self) # setting properties label b_label.setAlignment(Qt.AlignCenter) b_label.setGeometry(50, 100, 300, 20) b_label.setStyleSheet("QLabel" "{" "border : 1px solid black;" "background : rgba(70, 70, 70, 25);" "}") b_label.setFont(QFont('Times', 9)) # creating a calendar widget to select the date self.calendar = QCalendarWidget(self) # setting geometry of the calendar self.calendar.setGeometry(50, 120, 300, 180) # setting font to the calendar self.calendar.setFont(QFont('Times', 6)) # creating a label days_label = QLabel("Days", self) # setting geometry to the label days_label.setGeometry(50, 320, 147, 40) # setting alignment days_label.setAlignment(Qt.AlignCenter) # setting stylesheet days_label.setStyleSheet("QLabel" "{" "border : 2px solid black;" "background : rgba(70, 70, 70, 35);" "}") days_label.setFont(QFont('Times', 9)) # creating a spin box to get the days self.days = QSpinBox(self) # setting geometry to the spin box self.days.setGeometry(203, 320, 147, 40) # setting maximum value of spin box self.days.setMaximum(99999999) # setting font and alignment self.days.setFont(QFont('Times', 9)) self.days.setAlignment(Qt.AlignCenter) # creating a push button add = QPushButton("Add Days", self) # setting geometry to the push button add.setGeometry(80, 380, 100, 40) # adding action to the button add.clicked.connect(self.add_action) # adding color effect to the push button color = QGraphicsColorizeEffect() color.setColor(Qt.blue) add.setGraphicsEffect(color) # creating a push button subtract = QPushButton("Subtract Days", self) # setting geometry to the push button subtract.setGeometry(220, 380, 100, 40) # adding action to the button subtract.clicked.connect(self.subtract_action) # adding color effect to the push button color = QGraphicsColorizeEffect() color.setColor(Qt.red) subtract.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, 440, 300, 60) # 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 called by the add push button def add_action(self): # get the days from the spin box days = self.days.value() # call the calculate action self.calculate(days) # method called by the subtract push button def subtract_action(self): # get the days from the spin box # make the days value negative days = 0 - self.days.value() # call the calculate action self.calculate(days) def calculate(self, days): # get the selected date of calendar selected_date = self.calendar.selectedDate() # adding days to the selected days new_date = selected_date.addDays(days) # showing this date through label self.result.setText("Date : " + new_date.toString(Qt.ISODate)) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
