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 ())
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Output :