在PyQt5中为圆角窗口做遮挡时的抗锯齿（增加平滑度）。

3 人关注
我正在制作一个窗口，我希望有圆角，我知道通过设置可以很容易地实现。
        self.mainframe=QFrame(self)
        self.mainframe.setStyleSheet("background:blue;border-radius:25px")
        self.setCentralWidget(self.mainframe)
        self.setWindowFlags(Qt.FramelessWindowHint)
        self.setAttribute(Qt.WA_TranslucentBackground)
它有很好的圆角，我的意思是角是光滑的（反碱）。

但我不想这样做，因为有一个原因。我有第二种选择，我用掩码来设置绘画者路径 in 缩放事件（resizeEvent.
Here is the code
def resizeEvent(self, event):
        path = QPainterPath()
        print(self.rect())
        path.addRoundedRect(QRectF(self.rect()),25, 25,Qt.AbsoluteSize)
        reg = QRegion(path.toFillPolygon().toPolygon())
        self.setMask(reg)  
但它的角落是不光滑的。有偏见.
Here is my complete code:
import sys
from PyQt5.QtCore import Qt,  QRectF
from PyQt5.QtGui import QPainterPath, QRegion
from PyQt5.QtWidgets import QApplication, QMainWindow, QFrame
class Example(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.resize(600,400)
        self.mainframe=QFrame(self)
        self.mainframe.setStyleSheet("background:blue;border-radius:25px")
        self.setCentralWidget(self.mainframe)
        # self.setWindowFlags(Qt.FramelessWindowHint)
        # self.setAttribute(Qt.WA_TranslucentBackground)
    def resizeEvent(self, event):
        path = QPainterPath()
        print(self.rect())
        path.addRoundedRect(QRectF(self.rect()),25, 25,Qt.AbsoluteSize)
        reg = QRegion(path.toFillPolygon().toPolygon())
        self.setMask(reg)     
if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = Example()