介绍

给窗体加上水印

效果

代码

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtGui import QPainter, QColor, QFont,QPen
from PyQt5.QtCore import Qtclass WatermarkedWindow(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setWindowTitle('Watermarked Window')self.setGeometry(100, 100, 400, 300)def paintEvent(self, event):painter = QPainter(self)painter.setRenderHint(QPainter.Antialiasing)# 设置水印文本和字体watermark_text = "WATERMARK"font = QFont()font.setPointSize(20)font.setItalic(True)font.setWeight(QFont.Light)painter.setFont(font)# 设置水印颜色（通常为半透明）color = QColor(0, 0, 0, 128)  # RGB(0, 0, 0) with alpha 128 (50% opacity)painter.setPen(QPen(color))# 绘制水印（可能需要调整位置和角度以使其看起来像水印）width, height = self.width(), self.height()tilt = 45  # 水印文本的倾斜角度（可选）for i in range(5):  # 绘制多个水印以增加效果for j in range(5):x = i * (width // 6) - width // 10y = j * (height // 6) - height // 10painter.save()  # 保存当前状态painter.translate(x, y)  # 移动到指定位置painter.rotate(tilt)  # 旋转文本（可选）painter.drawText(0, font.pointSize(), watermark_text)  # 绘制文本painter.restore()  # 恢复之前保存的状态# 如果有其他绘制内容，可以在这里添加if __name__ == '__main__':app = QApplication(sys.argv)ex = WatermarkedWindow()ex.show()sys.exit(app.exec_())