PyQt5 – 日期计算器的天数
在本文中，我们将了解如何在 PyQt5 中创建日期计算器的天数，日期计算器的天数用于添加或减去所选日期的天数以获取新日期。该计算器用于获取给定天数后的确切日期。下面是计算器的样子
PyQt5是跨平台的 GUI 工具包，一组用于 Qt v5 的Python绑定。由于该库提供的工具和简单性，人们可以非常轻松地开发交互式桌面应用程序。下面是安装 PyQt5 的命令
pip install PyQt5GUI 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 date
Back-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
下面是实现
# 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())
输出 ：