Re: Symbols in custom legend

[Vedran F. <ved...@gm...>]

Thanks for your reply.

On 21.05.2010 11:06, Uwe Rathmann wrote:

> The legend items are updated by the curves in replot - killing your local 
> changes. When updating a curve uses the identifierMode from the legend.  The 
> font of the plot items should be inherited from the legend. So simply assign 
> mode and font to the legend instead to the legend items.

Works!

> If you want to have different symbols for curve and legend item you have to 
> overload YourCurve:.legendItem(). In Qwt 6.x you would could also reimplement 
> QwtPlotCurve::drawLegendIdentifier().

I use Qwt 5 and have now overloaded legendItem in my QwtPlotCurve
subclass as suggested:

    QwtLegendItem* legendItem() const
    {
        QwtLegendItem* legendItem = new QwtLegendItem;
        legendItem->setSymbol(QwtSymbol(QwtSymbol::Rect,
                                        QBrush(Qt::blue),
                                        QPen(QBrush(Qt::blue),1),
                                        QSize(6,6)));

        return legendItem;
    }

But now I don't get any symbol in the legend, only text is displayed.

Thanks,
Vedran


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