bubbleswidget.py 文件源码

def paintEvent(self, event):

        background = QRadialGradient(QPointF(self.rect().topLeft()), 500,
                QPointF(self.rect().bottomRight()))
        background.setColorAt(0, self.backgroundColor1)
        background.setColorAt(1, self.backgroundColor2)

        painter = QPainter()
        painter.begin(self)
        painter.setRenderHint(QPainter.Antialiasing)
        painter.fillRect(event.rect(), QBrush(background))

        painter.setPen(self.pen)

        for bubble in self.bubbles:

            if QRectF(bubble.position - QPointF(bubble.radius, bubble.radius),
                      QSizeF(2*bubble.radius, 2*bubble.radius)).intersects(QRectF(event.rect())):
                bubble.drawBubble(painter)

        if self.newBubble:

            self.newBubble.drawBubble(painter)

        painter.end()