uiBasicWidget.py 文件源码

def generatePicture(self):
        ## pre-computing a QPicture object allows paint() to run much more quickly,
        ## rather than re-drawing the shapes every time.
        self.picture = QtGui.QPicture()
        p = QtGui.QPainter(self.picture)
        p.setPen(pg.mkPen(color='r', width=0.4))  # 0.4 means w*2
        # w = (self.data[1][0] - self.data[0][0]) / 3.
        w = 0.2
        for (t, open, close, min, max) in self.data:
            p.drawLine(QtCore.QPointF(t, min), QtCore.QPointF(t, max))
            if open > close:
                p.setBrush(pg.mkBrush('g'))
            else:
                p.setBrush(pg.mkBrush('r'))
            p.drawRect(QtCore.QRectF(t-w, open, w*2, close-open))
        p.end()