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hi
excuse me for bad English!
i'm beginner in Qt Polar Plot and i need to calculate position of cursor in Polar screen so i use pole position.
i map cursor position to widget position and i aum with polar screen that result have error!
this error is change with change width/height!
how solve this problem?
Hi
I fix this error with add two line in mapping cursor to polar screen:
double dx=((QwtPolarPlot*)(m_polarWidget))->width()-canvasRect.width();
double dy=((QwtPolarPlot*)(m_polarWidget))->height()-canvasRect.height();
m_position=m_polarWidget->mapFromGlobal(QCursor::pos());
auto Position=QPointF(m_position.x()-(pole.x()+dx/2),(pole.y())-m_position.y())/(m_zoomScale.x()*scale);
but i have another Question that is :
this answer must scale in x/y to correct in polar screen,how find this scale number?
Please Help me....
thanks.
Mapping between polar and widget coordinates can be done using the QwtScaleMaps - see QwtPolarPlot::canvasMap(). But note the widget coordinates are positions of the plot canvas ( see QwtPolarPlot::canvas() ).
Uwe
thanks for answer me
I try and go back...
Added after 14 minutes:
Hi again...
i see two subject but :
1- Can't find QwtPolarPlot::canvasMap() Function!
2- I need to scale Global Position of cursor and do this for regular widget but for this widget i must calculate scale number to correct this process,in this progress,i can't find scale than normal render with painter!
how solve this Ooops problem!
please help me... :crying:
thanks...
It's QwtPolarMap::scaleMap().
Uwe
Hi
thanks for help me.
I Found this class but when i map shap in position(x,y) to polar plot screen,position don't correct!
please show me with code and help me more please...
thanks.
Hi
Thanks again for help me and reference me to solve this problem.
I finally solve this problem.
have good time.
a.a