python - 带有圆形图像的 Qlabel

Question

我想在 QT/PySide2 应用程序中显示圆形图像。

下面是我试过的代码。

self.statusWidget = QLabel()
img = QImage(":/image.jpg").scaled(49, 49, Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
self.statusWidget.setPixmap(QPixmap.fromImage(img))
self.statusWidget.setStyleSheet("border-radius:20px")

我得到了低于输出。



我想要像下面这样的 Qlabel。

Answer 1

用户头像 QLabel

制作圆形头像的最佳方法

该方法使用 setClipPath QPainter 方法与 QPainterPath 结合使用
裁剪图像。

import sys
from PyQt5.QtCore    import Qt
from PyQt5.QtGui     import QPixmap, QPainter, QPainterPath
from PyQt5.QtWidgets import QLabel, QWidget, QHBoxLayout, QApplication

class Label(QLabel):
    def __init__(self, *args, antialiasing=True, **kwargs):
        super(Label, self).__init__(*args, **kwargs)
        self.Antialiasing = antialiasing
        self.setMaximumSize(50, 50)
        self.setMinimumSize(50, 50)
        self.radius = 25 

        self.target = QPixmap(self.size())  
        self.target.fill(Qt.transparent)   

        p = QPixmap("E:/_Qt/img/qt-logo.png").scaled(  
            50, 50, Qt.KeepAspectRatioByExpanding, Qt.SmoothTransformation)

        painter = QPainter(self.target)
        if self.Antialiasing:
            painter.setRenderHint(QPainter.Antialiasing, True)
            painter.setRenderHint(QPainter.HighQualityAntialiasing, True)
            painter.setRenderHint(QPainter.SmoothPixmapTransform, True)

        path = QPainterPath()
        path.addRoundedRect(
            0, 0, self.width(), self.height(), self.radius, self.radius)

        painter.setClipPath(path)
        painter.drawPixmap(0, 0, p)
        self.setPixmap(self.target)

class Window(QWidget):
    def __init__(self, *args, **kwargs):
        super(Window, self).__init__(*args, **kwargs)
        layout = QHBoxLayout(self)
        layout.addWidget(Label(self))
        layout.addWidget(Label(self, antialiasing=False))  
        self.setStyleSheet("background: blue;")           

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