import sys
from typing import Sequence

from PySide6.QtWidgets import QApplication, QDialog, QLabel, QPushButton, QVBoxLayout
from PySide6.QtCore import Slot

class Application():
    def __init__(self, argv: Sequence[str]):
        self.app = QApplication(argv)
        self.counter = 0
        self.window = QDialog()
        self.layout = QVBoxLayout(self.window)
        self.label = QLabel("0")
        self.button_increment = QPushButton("Increment counter!")
        self.button_decrement = QPushButton("Decrement counter!")

        self.window.setWindowTitle("PDF Table Extractor")
        self.layout.addWidget(self.label)
        self.layout.addWidget(self.button_increment)
        self.layout.addWidget(self.button_decrement)
        self.button_increment.clicked.connect(self.increment)
        self.button_decrement.clicked.connect(self.decrement)
        print(self.window.layout())

    @Slot()
    def increment(self):
        self.counter += 1
        self.label.setText(f"{self.counter}")

    @Slot()
    def decrement(self):
        self.counter -= 1
        self.label.setText(f"{self.counter}")

    def exec(self):
        self.window.show()
        self.app.exec()

if __name__ == "__main__":
    app = Application(sys.argv)
    app.exec()