如何使用 SQL 數據庫更改 QCalendarWidget 中單元格的背景顏色

Question

這不是如何將 sql 數據輸出到 QCalendarWidget 的重復問題

這是該問題的補充。

這也不是Qt5 日歷小部件中突出顯示日期間隔的重復，因為這只是在用戶在實際 QT 頁面上選擇單元格時突出顯示單元格，而不是使用 SQL 數據。 這也不是着色 PyQt5 QCalendarWidget 單元格和在單元格內打印數據的重復問題，因為答案不符合我希望我的程序執行的操作，即使用我的 sql 數據庫更改日歷特定單元格的背景顏色這樣做，以及我無法得到工作的答案。

在第一個鏈接的問題中，我問用戶如何按下日期，如果該日期在 sql 數據庫中，它將輸出與該日期對應的文本。 在一些幫助下，我設法讓這個工作。 現在我想要做的是用藍色背景突出顯示那些日期，就像當前日期用紅色背景突出顯示一樣。

我制作的 QT 頁面是這樣的：

我的QT頁面

我的數據庫是這樣的：

我的數據庫

我的代碼是這樣的：

        # -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'Calendar.ui'
#
# Created by: PyQt5 UI code generator 5.14.1
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets
import sqlite3
import datetime
import PyQt5
from PyQt5.QtCore import QDate, Qt
from PyQt5.QtGui import (QColor, QFont, QTextCharFormat, QTextLength,
        QTextTableFormat)
from PyQt5.QtWidgets import (QApplication, QComboBox, QDateTimeEdit,
        QHBoxLayout, QLabel, QMainWindow, QSpinBox, QTextBrowser, QVBoxLayout,
        QWidget)

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1200, 900)
        MainWindow.setMinimumSize(QtCore.QSize(0, 0))
        MainWindow.setMaximumSize(QtCore.QSize(1200, 900))
        MainWindow.setStyleSheet("background-color: rgb(200, 200, 200);")
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.Header = QtWidgets.QTextEdit(self.centralwidget)
        self.Header.setEnabled(False)
        self.Header.setGeometry(QtCore.QRect(-10, 0, 1300, 110))
        self.Header.setMinimumSize(QtCore.QSize(1300, 110))
        self.Header.setMaximumSize(QtCore.QSize(1300, 110))
        self.Header.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"border-color: rgb(255, 255, 255);\n"
"border-width : 1.2px;\n"
"border-style:inset;")
        self.Header.setObjectName("Header")
        self.LECTURP = QtWidgets.QLabel(self.centralwidget)
        self.LECTURP.setGeometry(QtCore.QRect(512, 2, 180, 61))
        self.LECTURP.setStyleSheet("color: rgb(0, 176, 240);\n"
"font: 8pt \"MS Shell Dlg 2\";\n"
"text-decoration: underline;\n"
"background-color: rgb(255, 255, 255);\n"
"font: 28pt \"Calbri\";\n"
"text-decoration: underline;")
        self.LECTURP.setObjectName("LECTURP")
        self.LecturpBanner = QtWidgets.QLabel(self.centralwidget)
        self.LecturpBanner.setGeometry(QtCore.QRect(320, 60, 561, 31))
        self.LecturpBanner.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"color: rgb(0, 176, 240);\n"
"font: 14pt \"Calibri\";")
        self.LecturpBanner.setObjectName("LecturpBanner")
        self.calendarWidget = QtWidgets.QCalendarWidget(self.centralwidget)
        self.calendarWidget.setGeometry(QtCore.QRect(30, 110, 1141, 661))
        self.calendarWidget.setStyleSheet("alternate-background-color: rgb(255, 255, 255);\n"
"font: 75 16pt \"MS Shell Dlg 2\";\n"
"background-color: rgb(200, 200, 200);\n"
"selection-background-color: rgb(255, 0, 0);")
        self.calendarWidget.setObjectName("calendarWidget")
        self.DateInfoOutput = QtWidgets.QLabel(self.centralwidget)
        self.DateInfoOutput.setGeometry(QtCore.QRect(30, 778, 1141, 97))
        self.DateInfoOutput.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"border-color: rgb(0, 0, 0);\n"
"font: 16pt \"Calibri\";\n"
"border-width : 1.2px;\n"
"border-style:inset;")
        self.DateInfoOutput.setText("")
        self.DateInfoOutput.setObjectName("DateInfoOutput")
        self.WeekNumber = QtWidgets.QLabel(self.centralwidget)
        self.WeekNumber.setGeometry(QtCore.QRect(56, 168, 113, 49))
        self.WeekNumber.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"font: 16pt \"MS Shell Dlg 2\";")
        self.WeekNumber.setObjectName("WeekNumber")
        self.calendarWidget.raise_()
        self.Header.raise_()
        self.LECTURP.raise_()
        self.LecturpBanner.raise_()
        self.DateInfoOutput.raise_()
        self.WeekNumber.raise_()
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        self.editor = QTextBrowser()


        self.calendarWidget.clicked[QDate].connect(self.dateClicked)


    def dateClicked(self, clickedDate):
        connection = sqlite3.connect("Calendardatabase.db") 
        crsr = connection.cursor() 
        crsr.execute(
            'SELECT Text FROM Calendar WHERE Day = ? AND Month = ? AND YEAR = ?', 
            (clickedDate.day(), clickedDate.month(), clickedDate.year()))
        result = crsr.fetchone()

        if result:
            self.DateInfoOutput.setText(result[0])
        else:
            self.DateInfoOutput.setText('')


    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.LECTURP.setText(_translate("MainWindow", "LECTURP"))
        self.LecturpBanner.setText(_translate("MainWindow", "Lecture, Exam, Coursework, Timetable, Uploader and Reminder Program."))
        self.WeekNumber.setText(_translate("MainWindow", "Week No."))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

我試圖按照你的意見，我已經做到了這一點：

    crsr.execute('SELECT Date FROM Calendar2 WHERE Number = ?', (Count,))
        Dates3 = crsr.fetchone()
        Dates3 = str(Dates3)
        Dates3 = Dates3.replace("'", "")
        Dates3 = Dates3.replace('(', '')
        Dates3 = Dates3.replace(')', '')
        Dates3 = Dates3.replace(',', '')
        print(All_Dates)

        print(Dates3)
        Dates3 = Dates3.replace('/', ',')


        self.dates = { QDate(2020, 3, 20): ["Um Sure"] }

        format = QTextCharFormat() 
        format.setBackground(QColor("salmon")) 
        self.calendarWidget.setDateTextFormat(Dates3, format)

無論我嘗試運行它，我都會收到此錯誤：

Message=setDateTextFormat(self, Union[QDate, datetime.date], QTextCharFormat): 參數 1 有意外的類型 'str'

我嘗試使用 self.dates 變量，但這也不起作用。 我不確定如何將日期轉換為輸出的 QDate 部分可接受的格式。

好的，一切正常，但是當我做這個 while 循環時，我只是想知道我是否做錯了 python 或錯誤的 QT。

    Count = 1 
        while Count <= list3:
            connection = sqlite3.connect("Calendardatabase.db") 
            # This is the code for the database cursor 


            Current_Day = datetime.date.today().strftime("%A,")
            Current_Date = datetime.date.today().strftime("%d")
            Current_Month = datetime.date.today().strftime("%B")


            Combined_Date = ("It is a " + Current_Day + " It is the " + Current_Date + " of " + Current_Month)

            Combined_Date = str(Combined_Date)

            self.DateInfoOutput.setText(Combined_Date)

            cursor = self.editor.textCursor()



            crsr.execute('SELECT Date FROM Calendar2 WHERE Number = ?', (Count,))
            Dates3 = crsr.fetchone()
            Dates3 = str(Dates3)
            Dates3 = Dates3.replace("'", "")
            Dates3 = Dates3.replace('(', '')
            Dates3 = Dates3.replace(')', '')
            Dates3 = Dates3.replace(',', '')


            crsr.execute('SELECT Text FROM Calendar2 WHERE Number = ?', (Count,))
            Text = crsr.fetchone()
            Text = str(Text)
            Text = Text.replace("'", "")
            Text = Text.replace('(', '')
            Text = Text.replace(')', '')
            Text = Text.replace(',', '')


            print(Dates3)

            Dates3 = Dates3.replace('/', ' ')
            Dates3 = Dates3.replace("'", '')
            Dates3.split()

            sqlDay = int(Dates3[0:2])
            sqlMonth = int(Dates3[3:4])
            sqlYear = int(Dates3[6:10])



            self.dates = { QDate(sqlYear, sqlMonth, sqlDay): ["Hi"]}



            format = QTextCharFormat() 
            format.setBackground(QColor("lightblue")) 


            Count = Count + 1
            for date, value in self.dates.items(): 
                self.calendarWidget.setDateTextFormat(date, format)
                self.DateInfoOutput.setText(Text)
            else:
                self.DateInfoOutput.setText(Combined_Date)
        else:
            self.DateInfoOutput.setText(Combined_Date)

Answer 1

本案的程序是：

• 對數據庫進行查詢。
• 以字符串形式獲取日期。
• 使用指向適當格式的QDate.fromString()方法將字符串轉換為QDate ，並且
• 使用QCalendarWidget.setDateTextFormat()在QCalendarWidget設置該日期的格式。

import os
import sqlite3

from PyQt5 import QtCore, QtGui, QtWidgets

CURRENT_DIR = os.path.dirname(os.path.realpath(__file__))

if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    calendar = QtWidgets.QCalendarWidget()
    calendar.show()

    connection = sqlite3.connect(os.path.join(CURRENT_DIR, "Calendardatabase.db"))
    crsr = connection.cursor()
    crsr.execute("""SELECT Date FROM Calendar2""")

    date_format = "d/M/yyyy"
    cell_format = QtGui.QTextCharFormat()
    cell_format.setBackground(QtGui.QColor("red"))

    for row in crsr.fetchall():
        date_str, *_ = row
        dt = QtCore.QDate.fromString(date_str, date_format)
        if dt.isValid():
            calendar.setDateTextFormat(dt, cell_format)
        else:
            print("{} does not match format {}".format(date_str, date_format))

    sys.exit(app.exec_())

Answer 2

在得到@eyllanesc 的幫助后，我已經完全完成了我的程序，我將把我的程序留在這里，這樣如果有人遇到困難，他們可以使用我的程序作為指導，或者在任何情況下提供幫助。

    # -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'Calendar.ui'
#
# Created by: PyQt5 UI code generator 5.14.1
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets
import sqlite3
import datetime
import PyQt5
from PyQt5.QtCore import QDate, Qt
from PyQt5.QtGui import (QColor, QFont, QTextCharFormat, QTextLength,
        QTextTableFormat)
from PyQt5.QtWidgets import (QApplication, QComboBox, QDateTimeEdit,
        QHBoxLayout, QLabel, QMainWindow, QSpinBox, QTextBrowser, QVBoxLayout,
        QWidget)

class Ui_CalendarWidget(object):
    def setupUi(self, CalendarWidget):
        CalendarWidget.setObjectName("CalendarWidget")
        CalendarWidget.resize(1200, 900)
        CalendarWidget.setMinimumSize(QtCore.QSize(0, 0))
        CalendarWidget.setMaximumSize(QtCore.QSize(1200, 900))
        CalendarWidget.setStyleSheet("background-color: rgb(200, 200, 200);")
        self.centralWidget = QtWidgets.QWidget(CalendarWidget)
        self.centralWidget.setObjectName("centralWidget")
        self.Header = QtWidgets.QTextEdit(self.centralWidget)
        self.Header.setEnabled(False)
        self.Header.setGeometry(QtCore.QRect(-10, 0, 1300, 110))
        self.Header.setMinimumSize(QtCore.QSize(1300, 110))
        self.Header.setMaximumSize(QtCore.QSize(1300, 110))
        self.Header.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"border-color: rgb(255, 255, 255);\n"
"border-width : 1.2px;\n"
"border-style:inset;")
        self.Header.setObjectName("Header")
        self.LECTURP = QtWidgets.QLabel(self.centralWidget)
        self.LECTURP.setGeometry(QtCore.QRect(512, 2, 180, 61))
        self.LECTURP.setStyleSheet("color: rgb(0, 176, 240);\n"
"font: 8pt \"MS Shell Dlg 2\";\n"
"text-decoration: underline;\n"
"background-color: rgb(255, 255, 255);\n"
"font: 28pt \"Calbri\";\n"
"text-decoration: underline;")
        self.LECTURP.setObjectName("LECTURP")
        self.LecturpBanner = QtWidgets.QLabel(self.centralWidget)
        self.LecturpBanner.setGeometry(QtCore.QRect(320, 60, 561, 31))
        self.LecturpBanner.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"color: rgb(0, 176, 240);\n"
"font: 14pt \"Calibri\";")
        self.LecturpBanner.setObjectName("LecturpBanner")
        self.calendarWidget = QtWidgets.QCalendarWidget(self.centralWidget)
        self.calendarWidget.setGeometry(QtCore.QRect(30, 110, 1141, 661))
        self.calendarWidget.setStyleSheet("alternate-background-color: rgb(255, 255, 255);\n"
"font: 75 16pt \"MS Shell Dlg 2\";\n"
"background-color: rgb(200, 200, 200);\n"
"selection-background-color: rgb(255, 0, 0);")
        self.calendarWidget.setObjectName("calendarWidget")
        self.DateInfoOutput = QtWidgets.QLabel(self.centralWidget)
        self.DateInfoOutput.setGeometry(QtCore.QRect(30, 778, 1141, 97))
        self.DateInfoOutput.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"border-color: rgb(0, 0, 0);\n"
"font: 16pt \"Calibri\";\n"
"border-width : 1.2px;\n"
"border-style:inset;")
        self.DateInfoOutput.setText("")
        self.DateInfoOutput.setObjectName("DateInfoOutput")
        self.WeekNumber = QtWidgets.QLabel(self.centralWidget)
        self.WeekNumber.setGeometry(QtCore.QRect(56, 168, 113, 49))
        self.WeekNumber.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"font: 16pt \"MS Shell Dlg 2\";")
        self.WeekNumber.setObjectName("WeekNumber")
        self.calendarWidget.raise_()
        self.Header.raise_()
        self.LECTURP.raise_()
        self.LecturpBanner.raise_()
        self.DateInfoOutput.raise_()
        self.WeekNumber.raise_()
        CalendarWidget.setCentralWidget(self.centralWidget)
        self.statusbar = QtWidgets.QStatusBar(CalendarWidget)
        self.statusbar.setObjectName("statusbar")
        CalendarWidget.setStatusBar(self.statusbar)

        self.retranslateUi(CalendarWidget)
        QtCore.QMetaObject.connectSlotsByName(CalendarWidget)

        self.editor = QTextBrowser()


        self.calendarWidget.clicked[QDate].connect(self.dateClicked)

        connection = sqlite3.connect("Calendardatabase.db")
        crsr = connection.cursor()

        Current_Day = datetime.date.today().strftime("%A,")
        Current_Date = datetime.date.today().strftime("%d")
        Current_Month = datetime.date.today().strftime("%B")

        Combined_Date = ("It is a " + Current_Day + " It is the " + Current_Date + " of " + Current_Month)

        Combined_Date = str(Combined_Date)

        self.DateInfoOutput.setText(Combined_Date)


        #This is where the SQL Data is converted to d/M/yyyy and is then highlighted onto the calendar widget itself.

        connection = sqlite3.connect("Calendardatabase.db")
        crsr = connection.cursor()
        crsr.execute("""SELECT Date FROM Calendar2""")

        date_format = "d/M/yyyy"
        cell_format = QtGui.QTextCharFormat()
        cell_format.setBackground(QtGui.QColor("lightblue"))

        for row in crsr.fetchall():
            date_str, *_ = row
            dt = QtCore.QDate.fromString(date_str, date_format)
            if dt.isValid():
                self.calendarWidget.setDateTextFormat(dt, cell_format)
            else:
                self.DateInfoOutput.setText("{} does not match format {}".format(date_str, date_format))









    def dateClicked(self, clickedDate):
        connection = sqlite3.connect("Calendardatabase.db") 
        # This is the code for the database cursor 
        crsr = connection.cursor() 
        Count = 1
        crsr.execute('SELECT Day FROM Calendar WHERE Number = ?', (Count,))
        RawDay = crsr.fetchone()
        Day = str(RawDay)
        Day = Day.replace('(', '')
        Day = Day.replace(')', '')
        Day = Day.replace(',', '')
        Day = int(Day)

        crsr.execute('SELECT Month FROM Calendar WHERE Number = ?', (Count,))
        RawMonth = crsr.fetchone()
        Month = str(RawMonth)
        Month = Month.replace('(', '')
        Month = Month.replace(')', '')
        Month = Month.replace(',', '')
        Month = int(Month)

        crsr.execute('SELECT Year FROM Calendar WHERE Number = ?', (Count,))
        RawYear = crsr.fetchone()
        Year = str(RawDay)
        Year = Year.replace('(', '')
        Year = Year.replace(')', '')
        Year = Year.replace(',', '')
        Year = int(Year)        


        Current_Day = datetime.date.today().strftime("%A,")
        Current_Date = datetime.date.today().strftime("%d")
        Current_Month = datetime.date.today().strftime("%B")


        Combined_Date = ("It is a " + Current_Day + " It is the " + Current_Date + " of " + Current_Month)

        Combined_Date = str(Combined_Date)

        self.DateInfoOutput.setText(Combined_Date)

        cursor = self.editor.textCursor()

        All_Dates = (Day, Month, Year)

        self.selectedDate = QDate.currentDate()
        connection = sqlite3.connect("Calendardatabase.db") 
        crsr = connection.cursor() 
        crsr.execute(
            'SELECT Text FROM Calendar WHERE Day = ? AND Month = ? AND YEAR = ?', 
            (clickedDate.day(), clickedDate.month(), clickedDate.year()))
        result = crsr.fetchone()

        self.Date = (clickedDate.day() , '/' , clickedDate.month() , '/' , clickedDate.year())



        if result:
            self.DateInfoOutput.setText(result[0])


        else:
            self.DateInfoOutput.setText(Combined_Date)








    def retranslateUi(self, CalendarWidget):
        _translate = QtCore.QCoreApplication.translate
        CalendarWidget.setWindowTitle(_translate("CalendarWidget", "CalendarWidget"))
        self.LECTURP.setText(_translate("CalendarWidget", "LECTURP"))
        self.LecturpBanner.setText(_translate("CalendarWidget", "Lecture, Exam, Coursework, Timetable, Uploader and Reminder Program."))
        self.WeekNumber.setText(_translate("CalendarWidget", "Week No."))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    CalendarWidget = QtWidgets.QMainWindow()
    ui = Ui_CalendarWidget()
    ui.setupUi(CalendarWidget)
    CalendarWidget.show()
    sys.exit(app.exec_())

為了讓這個程序工作，你還需要我的數據庫，你可以從這里得到它： https : //www.dropbox.com/s/cua9gypkl869hnm/Calendardatabase.db?dl=0如果你只是把它放在同一個文件夾中作為程序文件，這應該可以工作。

謝謝@eyllanesc 的所有幫助，如果沒有你的幫助，我會在這個問題上被困數周:)