0.3.0 comments, 0.3.1 suggestions

[Uwe R. <Uwe...@mu...>]

Hi,

0.3.0 comments:

a) QwtPlot::redrawPixmap is in the header and documented but not implemented
b) Does someone know what the error data is about ? I guess it needs some
   documentation.

0.3.1 suggestions:

A) I would like to improve the flexibility of qwt by changing
   several methods to virtual:

QwtPlot

   virtual: updatePixmap, updateAxis, clear, replot

What about inventing new methods:

   bool insertCurve(QwtPlotCurve *, long key = -1);
   bool insertMarker(QwtPlotMarker *, long key = -1);
   bool setAxisScale(int axis, QwtScale *);

   Now we could use derived classes for QwtPlotCurve,
   QwtPlotMarker and QwtScale what is a big step. 

QwtCurve 
    virtual: draw, drawIntv, drawSymbols, drawErrors, copy

QwtMarker
    virtual: draw

d) QwtScale:
    virtual: ??? ( paintEvent, the most important one, is alreadey virtual )

B) I would like to add the drawCurveIntervall of my example as QwtPlot::drawIntv

All these changes could be done easily, without changes to Josefs design
and improve the flexibility of qwt a lot.

Comments ?

Uwe