python 框选截屏

以下是使用Python实现框选截屏的方法：

1. 使用PyQt库实现框选截屏：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel, QRubberBand
from PyQt5.QtGui import QPixmap, QPainter, QPen
from PyQt5.QtCore import Qt, QRect

class ScreenshotWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Screenshot")
        self.setWindowFlags(Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint)
        self.setWindowState(Qt.WindowFullScreen)
        self.setMouseTracking(True)
        self.rubberBand = QRubberBand(QRubberBand.Rectangle, self)
        self.origin = None

    def paintEvent(self, event):
        if self.origin:
            painter = QPainter(self)
            painter.setPen(QPen(Qt.red, 2, Qt.SolidLine))
            painter.drawRect(QRect(self.origin, self.end))

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.origin = event.pos()
            self.end = event.pos()
            self.rubberBand.setGeometry(QRect(self.origin, QSize()))
            self.rubberBand.show()

    def mouseMoveEvent(self, event):
        if self.origin:
            self.end = event.pos()
            self.rubberBand.setGeometry(QRect(self.origin, self.end).normalized())

    def mouseReleaseEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.rubberBand.hide()
            screenshot = QApplication.primaryScreen().grabWindow(0, self.origin.x(), self.origin.y(),
                                                                  self.end.x() - self.origin.x(),
                                                                  self.end.y() - self.origin.y())
            screenshot.save("screenshot.png", "png")
            self.close()

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

2. 使用Pillow库实现框选截屏：

from PIL import ImageGrab

def screenshot():
    im = ImageGrab.grab()
    im.show()

if __name__ == "__main__":
    screenshot()