Migrating from QWT 4.2 to QWT 6.14

[Atma K. <atm...@gm...>]

Hi All,
I am struggling with the following code snippet (written using QWT 4.2):
//Create scales for velocity and error
double scaleAngle = (int)(RTOD*acos(NEEDLE_RATIO/ARC_RATIO));
velocityScale = new QwtScaleDraw();
errorScale = new QwtScaleDraw();
velocityScale->setAngleRange(-scaleAngle, scaleAngle);
velocityScale->setScale(-maxVelocity,maxVelocity,2,2,maxVelocity/2.0);
velocityScale->setTickLength(2,2,3);
errorScale->setAngleRange(180 - scaleAngle,180 + scaleAngle);
errorScale->setScale(maxError,-maxError,2,2,maxError/2.0);
errorScale->setTickLength(2,2,3);

I haven't figured out how to setScale. I have changed the QwtScaleDraw to
QwtRoundScaleDraw
//Create scales for velocity and error
double scaleAngle = (int)(RTOD*acos(NEEDLE_RATIO/ARC_RATIO));
velocityScale = new QwtRoundScaleDraw();
errorScale = new QwtRoundScaleDraw();
velocityScale->setAngleRange(-scaleAngle, scaleAngle);

?? velocityScale->setScale(-maxVelocity,maxVelocity,2,2,maxVelocity/2.0);

velocityScale->setTickLength(QwtScaleDiv::MinorTick,2);
velocityScale->setTickLength(QwtScaleDiv::MediumTick,2);
velocityScale->setTickLength(QwtScaleDiv::MajorTick,3);
errorScale->setAngleRange(180 - scaleAngle,180 + scaleAngle);

?? errorScale->setScale(maxError,-maxError,2,2,maxError/2.0);

errorScale->setTickLength(QwtScaleDiv::MinorTick,2);
errorScale->setTickLength(QwtScaleDiv::MediumTick,2);
errorScale->setTickLength(QwtScaleDiv::MajorTick,3);

The setScale function declaration is as follows (from the documentation):
void QwtScaleDraw::setScale (double x1, double x2, int maxMajIntv, int
maxMinIntv,
double step = 0.0, int logscale = 0)

Any help is greatly appreciated
Thanks
Atma