def keyPressEvent(self, event):
    key = event.key()  # 獲取按鍵編碼
    if key == Qt.Key.Key_A:  # 檢測特定按鍵
        print("A鍵被按下")

def keyReleaseEvent(self, event):
    if event.key() == Qt.Key.Key_Space:
        print("空格鍵已釋放")

from PyQt6.QtCore import Qt
from PyQt6.QtWidgets import QMainWindow

class MainWindow(QMainWindow):
    def keyPressEvent(self, event):
        modifiers = event.modifiers()
        
        # 檢測單個修飾鍵
        if modifiers & Qt.ControlModifier:
            print("Ctrl 鍵被按下")
        
        # 檢測組合修飾鍵
        if modifiers == (Qt.ControlModifier | Qt.ShiftModifier):
            print("Ctrl+Shift 組合鍵")
        
        # 檢測按鍵+修飾鍵
        if event.key() == Qt.Key_S and modifiers & Qt.ControlModifier:
            print("Ctrl+S 保存操作")

from PyQt6.QtWidgets import QApplication, QMainWindow, QLabel
from PyQt6.QtCore import Qt

class KeyDemoWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.label = QLabel("按任意鍵測試修飾鍵", self)
        self.setCentralWidget(self.label)
        
    def keyPressEvent(self, event):
        mod_text = []
        modifiers = event.modifiers()
        
        if modifiers & Qt.ShiftModifier:
            mod_text.append("Shift")
        if modifiers & Qt.ControlModifier:
            mod_text.append("Ctrl")
        if modifiers & Qt.AltModifier:
            mod_text.append("Alt")
        
        key_name = event.text() if event.text().isprintable() else f"Key_{event.key()}"
        self.label.setText(f"按鍵: {key_name} | 修飾鍵: {', '.join(mod_text)}")

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

import sys
import serial
from PyQt6.QtCore import QThread, pyqtSignal, Qt
from PyQt6.QtSerialPort import QSerialPortInfo
from PyQt6.QtWidgets import (QApplication, QMainWindow, QVBoxLayout, QHBoxLayout,
                             QWidget, QLabel, QComboBox, QPushButton,
                             QTextEdit, QCheckBox, QSpinBox, QGroupBox)
from PyQt6.QtGui import QFont, QIcon, QPalette, QColor,QPainter

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.resize(800,600)
        self.x = 0
        self.y = 0

    def paintEvent(self, a0, QPaintEvent=None):
        p = QPainter(self)
        p.fillRect(self.x,self.y,100,100,Qt.GlobalColor.red)

    def keyPressEvent(self, event):
        if event.key() == Qt.Key.Key_Up:
            self.y-=10
        elif event.key() == Qt.Key.Key_Down:
            self.y+=10
        elif event.key() == Qt.Key.Key_Left:
            self.x-=10
        elif event.key() == Qt.Key.Key_Right:
            self.x += 10
        elif event.modifiers() == Qt.KeyboardModifier.ControlModifier and event.key() == Qt.Key.Key_Q:
            self.close()
        self.update()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec())