Controlling the margin of a QwtPolarPlot

[Momergil]

Hello!

Screenshot from 2014-07-16 14:29:37.png

In the above image one can see that there is big wasted spaces between the actual QwtPolarPlot and its background "widget". My question is: how can I control that so I may make those margins be thinner? I couldn't find any method in QwtPolarPlot to control such margins


Thanks,

Momergil

[Uwe]

First of all you can set the contents margins ( see QWidget::setContentsMargins(). The radius of the plot canvas is then calculated in QwtPolarPlot::plotRect().

Another factor might be the value, that is returned from QwtPolarGrid::marginHint(). This margin depends on the width for the tick labels and could be optimized for a plot like yours.

Uwe

[Momergil]

Thanks Uwe. QWidget::setContentsMargins() did the trick (although using negative values for such method sounds strange to say the least!)

Momergil