016 QCalendarWidget (달력 위젯)

1. 코드

from PyQt5.QtWidgets import QWidget, QApplication, QLabel, QVBoxLayout, QCalendarWidget,QPushButton
from PyQt5.QtCore import Qt, QDate
import sys

class 달력위젯(QWidget):

    def __init__(self):
        super().__init__()
        self.UI초기화()

    def UI초기화(self):
        self.cal = QCalendarWidget() 
        self.cal.setGridVisible(True) 
        self.cal.setDateRange(QDate(2020, 1, 1), QDate.currentDate()) 
        self.cal.clicked[QDate].connect(self.PastDate)  

        self.label1 = QLabel(self)
        self.date = self.cal.selectedDate() 
        self.label1.setText(self.date.toString())  

        self.label2 = QLabel(self) 
        previousBtn = QPushButton('이전 달')
        previousBtn.clicked.connect(self.preMonth)
        nextBtn = QPushButton('다음 달')
        nextBtn.clicked.connect(self.nextMonth)

        vbox = QVBoxLayout()
        vbox.addWidget(self.cal)
        vbox.addWidget(self.label1)
        vbox.addWidget(self.label2)
        vbox.addWidget(previousBtn)
        vbox.addWidget(nextBtn)

        self.setLayout(vbox)

        self.setWindowTitle('QCalendarWidget')
        self.setGeometry(300, 300, 500, 400)
        self.show()

    def PastDate(self, date):  
        self.label1.setText(date.toString()) 
        self.label2.setText(f'2020년 1월 1일부터 {QDate(2020,1,1).daysTo(date)}일이 지났습니다.') 

    def preMonth(self):
        self.cal.showPreviousMonth()

    def nextMonth(self):
        self.cal.showNextMonth()    


프로그램무한반복 = QApplication(sys.argv)
실행인스턴스 = 달력위젯()
프로그램무한반복.exec_()

2. 상세 내용

QCalendarWidget - Qt for Python

The widget is initialized with the current month and year, but provides several public slots to change the year and month that is shown. By default, today's date is selected, and the user can select a date using both mouse and keyboard. The currently selected date can be retrieved using the function.

https://doc.qt.io/qtforpython/PySide2/QtWidgets/QCalendarWidget.html

self.cal = QCalendarWidget()
self.cal.setGridVisible(True)
self.cal.setDateRange(QDate(2020, 1, 1), QDate.currentDate())
self.cal.clicked[QDate].connect(self.PastDate)

• setGridVisivle(True/Flase) : 격자 표시 설정

• clicked[QDate]를 통해 달력내 날짜가 눌리면 PasteDate 호출

def PastDate(self, date):
    self.label1.setText(date.toString())
    self.label2.setText(f'2020년 1월 1일부터 {QDate(2020,1,1).daysTo(date)}일이 지났습니다.') 

• toStirng()을 통해 라벨에 선택된 날짜 표시

• 시작날짜.daysTo(날짜) : 시작날짜로부터 선택된 날짜까지의 일 수를 반환

self.label1 = QLabel(self)
self.date = self.cal.selectedDate()
self.label1.setText(self.date.toString())

self.label2 = QLabel(self)
previousBtn = QPushButton('이전 달')
previousBtn.clicked.connect(self.preMonth)
nextBtn = QPushButton('다음 달')
nextBtn.clicked.connect(self.nextMonth)

• selectedDate() : 현재 선택된 날짜를 반환

def preMonth(self):
    self.cal.showPreviousMonth()

def nextMonth(self):
    self.cal.showNextMonth()

• showPreviousMonth() : 현재 월 기준 1달전 달력을 보여줌

• showNextMonth() : 현재 월 기준 1달후 달력을 보여줌

3. 실행 화면