python: pyQt6 table paging

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# 描述：
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# os        : windows 10
# database  : mysql 9.0 sql server 2019, poostgreSQL 17.0
# Datetime  : 2024/12/8 9:21
# User      : geovindu
# Product   : PyCharm
# Project   : Pysimple
# File      : pyqt6tablepaging.py
# explain   : 学习
from PyQt6.QtWidgets import QApplication, QWidget, QVBoxLayout, QTableWidget, QTableWidgetItem, QPushButton


class MainWindow(QWidget):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("Table with Paging")
        self.resize(300,300)

        # Sample data
        self.data = [
            ['Alice', '25', 'New York'],
            ['Bob', '30', 'Los Angeles'],
            ['Charlie', '35', 'Chicago'],
            ['David', '40', 'San Francisco'],
            ['Emily', '28', 'Seattle'],
            ['Frank', '32', 'Boston'],
            ['Grace', '27', 'Miami'],
            ['Harry', '36', 'Dallas'],
            ['Ivy', '29', 'Atlanta'],
            ['Jack', '31', 'Denver'],
        ]

        self.page_size = 3
        self.current_page = 0
        self.rect=(2,4,200,280)
        self.table = QTableWidget()
        self.table.setColumnCount(3)
        self.table.setHorizontalHeaderLabels(['Name', 'Age', 'City'])
        self.table.geometry=self.rect

        self.rect2 = (2, 220, 220, 280)

        self.prev_button = QPushButton("Previous")
        self.next_button = QPushButton("Next")

        self.prev_button.clicked.connect(self.prev_page)
        self.next_button.clicked.connect(self.next_page)
        self.prev_button.geometry=self.rect2
        layout = QVBoxLayout()
        layout.addWidget(self.table)
        layout.addWidget(self.prev_button)
        layout.addWidget(self.next_button)
        self.setLayout(layout)

        self.update_table()

    def update_table(self):
        start_index = self.current_page * self.page_size
        end_index = start_index + self.page_size

        self.table.setRowCount(0)

        for row_data in self.data[start_index:end_index]:
            row = self.table.rowCount()
            self.table.insertRow(row)
            for col, item in enumerate(row_data):
                self.table.setItem(row, col, QTableWidgetItem(item))

        self.prev_button.setEnabled(self.current_page > 0)
        self.next_button.setEnabled(end_index < len(self.data))

    def prev_page(self):
        self.current_page -= 1
        self.update_table()

    def next_page(self):
        self.current_page += 1
        self.update_table()


if __name__ == '__main__':
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec()