Auto scale of QwtPoltItem.

[jesse_mark]

I'm sub classing QwtPlotItem, and when i attached it to the plot, im trying to auto scale myPlotItem and the Y and X-Axis

so the the item that i attached will be in the visible area of the plot and I don't need to zoom out and pan around to find it.

so I'm doing :

myItem->setItemAttribute(QwtPlotItem::AutoScale,true);
                    myPlot->setAxisAutoScale(QwtPlot::xBottom);
                    myPlot->setAxisAutoScale(QwtPlot::yLeft);

myItem->setItemAttribute(QwtPlotItem::AutoScale,true);
                    myPlot->setAxisAutoScale(QwtPlot::xBottom);
                    myPlot->setAxisAutoScale(QwtPlot::yLeft);

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but its still not working and still need to zoom out to find my item.

what else i need to do to achieve this ??

Thanks

[Uwe]

You have to return a valid bounding rectangle ( see QwtPlotItem::boundingRect() ).

Uwe