Re: OpenGL plot canvas

[David S. <David_Stranz@MassSpec.com>]

Hi Uwe,

 > So please do a test to see if there is such a second method:
 >
 > a) Make the API of QwtAbstractSeriesStore public ( instead of
 > protected) in qwt_series_store.h
 >

Still get compiler warnings.

 > b) When using a debugger, do you run into
 > QwtSeriesStore<T>::setRectOfInterest() for the following code:
 >
 > QwtPlotBarItem* item = new QwtPlotBarChart();
 > item->setRectOfInterest( QRectF() );

In the debugger, this:

	QwtPlotBarChart w;
	w.setRectOfInterest( QRectF() );

steps into this:

template <typename T>
void QwtSeriesStore<T>::setRectOfInterest( const QRectF &rect )
{
     if ( d_series )
         d_series->setRectOfInterest( rect );
}

Call stack shows this:

 > QwtSeriesStore<QPointF>::setRectOfInterest(const QRectF & rect={...}) 
  Line 174

So, the code seems to be doing the right thing.

Cheers,

David
_______________________________________________________________
David Stranz, Ph.D.	david_stranz@MassSpec.com

Sierra Analytics, Inc.
5815 Stoddard Road, Suite 601
Modesto, CA  95356

Tel: (209) 545-8508
http://www.massspec.com
_______________________________________________________________


On 3/29/2012 11:58 PM, Uwe Rathmann wrote:
> Hi David,
>
>>
>> 1>g:\qt\qwt_6\src\qwt_plot_barchart.h(62) : warning C4250:
>> 'QwtPlotBarChart' : inherits
>> 'QwtSeriesStore<T>::QwtSeriesStore<T>::setRectOfInterest' via dominance
>>
>
> It is in fact a diamond situation: QwtSeriesStore<T>  and
> QwtPlotSeriesItem both have QwtAbstractSeriesStore as virtual base
> class. QwtPlotBarChart derives from QwtSeriesStore<QPointF>  and
> QwtPlotBarItem ( what is a QwtPlotSeriesItem ). ( Unfortunately I had to
> introduce such a construction to get rid of the templates when
> inheriting plot items in several steps: I wanted QwtPlotBarChart and
> QwtPlotMultiBarChart to have a common base class ).
>
> But inheriting from
> QwtSeriesStore<T>::QwtSeriesStore<T>::setRectOfInterest is the intended
> behaviour and I don't see any second method that might be dominated -
> like it is for all other methods from the QwtAbstractSeriesStore API.
>
> So please do a test to see if there is such a second method:
>
> a) Make the API of QwtAbstractSeriesStore public ( instead of protected
> ) in qwt_series_store.h
>
> b) When using a debugger, do you run into
> QwtSeriesStore<T>::setRectOfInterest() for the following code:
>
> QwtPlotBarItem* item = new QwtPlotBarChart();
> item->setRectOfInterest( QRectF() );
>
> Maybe there are tools like "nm" and "c++-filt" on Windows to check the
> compiled code for the existence of these dominated methods ?
>
> Uwe
>
>
>
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