Hi all,

I'd like to plot an image to QwtPlot and currently subclassing QwtPlotRasterItem by overriding renderImage method. Once the image is plotted:
1) I added a QwtPlotPicker, and it seems to work fine. But how can I get the picker selection (i.e. a rectangle or ellipsoid) to stay on the plot?
2) how can I iterate through the points on my image to highlight those that are inside the picker selection?

Thanks.