如何将 sql 数据输出到 QCalendarWidget

Question

我希望能够在我的日历小部件上突出显示我的 SQL 数据库中的一天，就像当您启动程序时如何突出显示当前日期一样，在我的示例中它是红色突出显示。

我想要发生的是当用户按下突出显示的日期时，数据库中日期旁边的文本显示在日历下方的标签上。

这是我使用 QT Designer 制作的页面：

PYQT 页面

这是包含所有数据的数据库：

SQL 数据库

这是创建 QT 页面的代码：

    # -*- 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()



    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_())

在我的代码中，我尝试使用此代码来执行此操作。这部分代码报错 date = Qdate(All_Dates, 3) 部分报错.

创建的错误是这样的：参数不匹配任何重载调用： QDate(): 参数太多 QDate(int, int, int)：参数 1 具有意外类型 'str' QDate(int, int, int, QCalendar)：参数 1 具有意外类型 'str' 下面的代码只是创建QT页面：

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()

        self.selectedDate = QDate.currentDate()


        All_Dates = (Day, Month, Year)
        All_Dates = str(All_Dates)



        date = QDate(All_Dates, 3)

        format = cursor.charFormat()
        format.setFontPointSize(self.fontSize)

        boldFormat = QTextCharFormat(format)
        boldFormat.setFontWeight(QFont.Bold)

        highlightedFormat = QTextCharFormat(boldFormat)
        highlightedFormat.setBackground(Qt.yellow)


        cell = table.cellAt(0, weekDay-1)
        cellCursor = cell.firstCursorPosition()
        cellCursor.insertText(QDate.longDayName(weekDay), boldFormat)

Answer 1

您需要连接到 clicked(date) 信号。

    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('')

除此之外：

从不，从不编辑使用 pyuic 创建的文件，而是将它们用作模块。在 using Designer.
避免对变量和属性使用大写名称。
避免小部件的固定位置和大小，除非真的有必要（通常不需要）；相反，更喜欢 layouts，它们可以在 Designer 的小部件框中轻松访问，或者可以通过上下文菜单在现有小部件上进行设置。
在问题中提供示例代码时，请始终确保它们都是 minimal and reproducible.

如何将 sql 数据输出到 QCalendarWidget

How to Output sql data onto a QCalendarWidget

python

sql

pyqt

qt-designer

pyqt5