用圆形区域剪辑文本

Question

如何制作带有文本的透明椭圆或用文本替换椭圆边框？

用边框替换文本

ellipse = QPainter(self)

ellipse.setOpacity(0.6)

ellipse.setPen(QtGui.QPen(Qt.darkGreen, 4, Qt.DashLine))    # Any way to replace 'DashLine with Text ?'

ellipse.setBrush(QBrush(QColor(self.window_bg), Qt.SolidPattern))

ellipse.drawEllipse(0, 0, self.ellipse_width, self.ellipse_height)

椭圆内的文字

ellipse = QPainter(self)

ellipse.setOpacity(0.6)

ellipse.setBrush(QBrush(QColor('#000000'), Qt.SolidPattern))

ellipse.drawEllipse(0, 0, 300, 300)

ellipse.drawText(10, 10, 'Random Text')

Answer 1

你必须使用一个setClipPath()：import randomfrom PyQt5 import QtCore, QtGui, QtWidgetsclass MainWindow(QtWidgets.QMainWindow):    def paintEvent(self, event):        window_bg = "#0011ff"        ellipse_width, ellipse_height = self.width(), self.height()        r = QtCore.QRectF(0, 0, ellipse_width, ellipse_height)        text = "Stack OverFlow :-)"        path = QtGui.QPainterPath()        path.addEllipse(r)        painter = QtGui.QPainter(self)        painter.setRenderHint(QtGui.QPainter.Antialiasing)        painter.setClipPath(path, QtCore.Qt.IntersectClip)        painter.setOpacity(0.6)        painter.setBrush(QtGui.QBrush(QtGui.QColor('#000000'), QtCore.Qt.SolidPattern))        painter.setPen(QtGui.QPen(QtCore.Qt.darkGreen, 4, QtCore.Qt.DashLine))            painter.setBrush(QtGui.QBrush(QtGui.QColor(window_bg), QtCore.Qt.SolidPattern))        painter.drawEllipse(r)        # draw text in random positions        for i in range(100):            x = random.randint(0, self.width())            y = random.randint(0, self.height())            painter.drawText(x, y, text)if __name__ == '__main__':    import sys    app = QtWidgets.QApplication(sys.argv)    w = MainWindow()    w.resize(640, 480)    w.show()    sys.exit(app.exec_())