Python PyQt5 日历小工具：添加提醒功能和删除提醒功能

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5 import QtCore
import datetime


class CalendarExample(QWidget):
    def __init__(self):
        super(CalendarExample, self).__init__()
        self.init_ui()
        self.memo_items = []

    def init_ui(self):
        self.setWindowTitle('我的超级无敌小日历')
        grid = QGridLayout()

        # 创建日历控件对象
        self.calendar = QCalendarWidget(self)
        self.calendar.setGridVisible(True)
        self.calendar.setMinimumDate(QDate(1970, 1, 1))
        self.calendar.setMaximumDate(QDate(3200, 1, 1))
        grid.addWidget(self.calendar, 4, 0, 1, 1)

        self.current_date_label = QLabel(self)
        self.current_date_label.setText('大人您选的日子是：')
        grid.addWidget(self.current_date_label, 0, 0, 1, 1)

        self.time_difference_label = QLabel(self)
        self.time_difference_label.setText('和您现在的日子差：')
        grid.addWidget(self.time_difference_label, 3, 0, 1, 1)

        self.calendar.clicked[QtCore.QDate].connect(self.show_current_date)
        self.calendar.clicked[QtCore.QDate].connect(self.show_time_difference)

        self.current_date = QLabel(self)
        self.current_date.setText(self.calendar.selectedDate().toString('yyyy-MM-dd'))
        grid.addWidget(self.current_date, 2, 0, 1, 1)

        self.setGeometry(100, 100, 100, 100)

        self.memo = QTextEdit(self)
        self.memo.setGeometry(30, 10, 30, 20)
        grid.addWidget(self.memo, 4, 2, 1, 1)

        # 回到今天
        self.button_today = QPushButton(self)
        self.button_today.setText('速速回到今天')
        self.button_today.clicked.connect(self.go_to_today)
        grid.addWidget(self.button_today, 5, 0, 1, 1)

        # 备忘录
        self.button_memo = QPushButton(self)
        self.button_memo.setText('主人想要记录点东西吗')
        self.button_memo.clicked.connect(self.add_memo)
        grid.addWidget(self.button_memo, 6, 0, 1, 1)
        # 删除软件
        self.button_memo2 = QPushButton(self)
        self.button_memo2.setText('主人想删了这个指令吗')
        self.button_memo2.clicked.connect(self.delete_memo_item) # 删除所有提醒事项
        grid.addWidget(self.button_memo2, 7, 0, 1, 1)
        # 实时时钟
        self.label_date = QLabel(self)
        self.label_date.move(20, 100)
        self.label_date.setFixedHeight(30)
        self.label_date.setFont(QFont('Arial', 10))
        grid.addWidget(self.label_date, 10, 0, 1, 1)

        # 显示日期
        self.show_date()

        # 显示时间
        self.label_time = QLabel(self)
        self.label_time.move(20, 100)
        self.label_time.setFont(QFont('Arial', 26))
        palette = QPalette()
        brush = QBrush(QColor(200, 100, 0))
        brush.setStyle(Qt.SolidPattern)
        palette.setBrush(QPalette.Active, QPalette.WindowText, brush)
        self.label_time.setPalette(palette)
        self.label_time.setFixedHeight(60)
        grid.addWidget(self.label_time, 11, 0, 1, 1)

        self.setLayout(grid)

        # 添加定时器
        self.timer = QTimer()
        self.timer.timeout.connect(self.show_time)
        self.timer.start(1000)

        # 添加提醒列表
        self.memos = QListWidget(self)
        grid.addWidget(self.memos, 4, 1, 1, 1)

        # 添加提醒定时器
        self.reminder_timer = QTimer()
        self.reminder_timer.timeout.connect(self.check_reminders)
        self.reminder_timer.start(1000)

        # 删除按钮
        self.button_delete = QPushButton(self)
        self.button_delete.setText('主人想删除选中项吗')
        self.button_delete.clicked.connect(self.delete_memo_item) # 删除选中提醒事项
        grid.addWidget(self.button_delete, 8, 0, 1, 1)

    def show_current_date(self, date):
        self.current_date.setText(date.toString('yyyy-MM-dd'))

    def show_time_difference(self, date):
        date1 = self.calendar.selectedDate()
        if date1.isValid():
            datetime1 = QDateTime(date1)
            seconds_difference = abs(datetime1.toSecsSinceEpoch() - QDateTime.currentDateTime().toSecsSinceEpoch())
            days_difference = seconds_difference // (24 * 3600)
            self.time_difference_label.setText('和您现在的日子差：%d天' % days_difference)
        else:
            self.time_difference_label.setText('和您现在的日子差：')

    def show_date(self):
        date = QDate.currentDate()
        self.label_date.setText(date.toString('yyyy年MM月dd日'))

    def show_time(self):
        time = QTime.currentTime()
        self.label_time.setText(time.toString('hh:mm:ss'))

    def go_to_today(self):
        today = QDate.currentDate()
        self.calendar.setSelectedDate(today)

    def add_memo(self):
        memo_dialog = QDialog(self)
        memo_dialog.setWindowTitle('主人，我会提醒你的 喵')
        memo_dialog.setWindowModality(Qt.ApplicationModal)

        # 添加标题
        title_label = QLabel('下旨', memo_dialog)
        title_input = QLineEdit(memo_dialog)

        # 添加内容
        content_label = QLabel('奉天承运，皇帝诏曰', memo_dialog)
        content_input = QTextEdit(memo_dialog)

        # 添加提醒时间
        time_label = QLabel('提醒时间', memo_dialog)
        time_edit = QDateTimeEdit(memo_dialog)
        time_edit.setDateTime(QDateTime.currentDateTime())

        # 添加按钮
        add_button = QPushButton('盖章', memo_dialog)
        add_button.clicked.connect(lambda: self.add_memo_item(title_input.text(), content_input.toPlainText(),
                                                             time_edit.dateTime()))

        # 添加布局
        memo_layout = QVBoxLayout()
        memo_layout.addWidget(title_label)
        memo_layout.addWidget(title_input)
        memo_layout.addWidget(content_label)
        memo_layout.addWidget(content_input)
        memo_layout.addWidget(time_label)
        memo_layout.addWidget(time_edit)
        memo_layout.addWidget(add_button)
        memo_dialog.setLayout(memo_layout)

        memo_dialog.exec_()

    def add_memo_item(self, title, content, time):
        memo_item = QListWidgetItem(title)
        memo_item.setData(Qt.UserRole, content)
        memo_item.setData(Qt.UserRole+1, time)
        self.memos.addItem(memo_item)
        self.memo_items.append(memo_item) # 将新添加的提醒item加入列表

    def delete_memo_item(self):
        selected_items = self.memos.selectedItems() # 获取所有选中的提醒item
        if not selected_items:
            return
        for item in selected_items:
            self.memos.takeItem(self.memos.row(item))
            self.memo_items.remove(item) # 从列表中移除该提醒item

    def check_reminders(self):
        current_time = QDateTime.currentDateTime()
        for i, item in enumerate(self.memo_items):
            memo_time = item.data(Qt.UserRole+1)
            if memo_time <= current_time:
                memo_content = item.data(Qt.UserRole)
                QMessageBox.information(self, '嗯嗯~~', memo_content)
                self.memo_items.pop(i) # 在提醒弹窗中删除该提醒item
                self.memos.takeItem(i) # 在提醒列表中删除该提醒item


if __name__ == '__main__':
    app = QApplication(sys.argv)
    demo = CalendarExample()
    demo.show()
    sys.exit(app.exec_())