PyQt6 键盘事件处理的实现及实例代码

def keyPressEvent(self, event):
    key = event.key()  # 获取按键编码
    if key == Qt.Key.Key_A:  # 检测特定按键
        print("A键被按下")

def keyReleaseEvent(self, event):
    if event.key() == Qt.Key.Key_Space:
        print("空格键已释放")

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

class MainWindow(QMainWindow):
    def keyPressEvent(self, event):
        modifiers = event.modifiers()
        
        # 检测单个修饰键
        if modifiers & Qt.ControlModifier:
            print("Ctrl 键被按下")
        
        # 检测组合修饰键
        if modifiers == (Qt.ControlModifier | Qt.ShiftModifier):
            print("Ctrl+Shift 组合键")
        
        # 检测按键+修饰键
        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("按任意键测试修饰键", 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"按键: {key_name} | 修饰键: {', '.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())