python PYQT5 键盘，鼠标，绘制，焦点，改变，输入法，事件的方法和使用例子

 https://img-blog.csdnimg.cn/7630017d3ee444eab9bdedf8d48d575f.png

                                

from PyQt5.Qt import *
import sys
class MyQwidget(QWidget):
    def __init__(self):
        super().__init__()

    def showEvent(self, a0) -> None:
        print("窗口被展示出来",a0)

    def closeEvent(self,a0) -> bool:
        print("窗口被关闭了")

    def moveEvent(self, a0) -> None:
        print("窗口被移动了")
    def resizeEvent(self, a0) -> None:
        print("窗口改变了尺寸大小")

    def enterEvent(self, a0) -> None:
        print("鼠标进来了")
        self.setStyleSheet("background-color: yellow;")

    def leaveEvent(self, a0) -> None:
        print("鼠标移出了控件范围了")
        self.setStyleSheet("background-color: green;")

    def mousePressEvent(self, a0) -> None:
        print("鼠标被按下了")

    def mouseReleaseEvent(self, a0) -> None:
        print("鼠标被释放")

    def mouseDoubleClickEvent(self, a0) -> None:
        print("鼠标双击")

    def mouseMoveEvent(self, a0) -> None:
        print("鼠标移动了")

    def keyPressEvent(self, a0) -> None:
        print("键盘上某一个按键被按下了")

    def keyReleaseEvent(self, a0) -> None:
        print("键盘上某一个按键被释放了")

    
app = QApplication(sys.argv)
win = MyQwidget()
win.setWindowTitle("鼠标操作的相关案例")
win.move(200, 200)


win.show()

sys.exit(app.exec_())

 使用方法文章来源地址https://uudwc.com/A/AZebE