Hi Bob QGIS allows you to have dynamic objects on top of map canvas. These objects are called map canvas items, having QgsMapCanvasItem as a base class. You can either implement your own item or use an existing implementation, e.g. QgsRubberBand class (used for example to highlight features when doing identification). In your case, you could have one QgsRubberBand instance and just change its position on map whenever appropriate.
Cheers Martin On Mon, Aug 11, 2014 at 9:11 AM, 腾飞 牛 <niu...@hotmail.com> wrote: > Dear all, > I'm a new developer of QGIS using C++. I am doing a project which needs > dynamically displaying maps/layers(just like GPS,layers automatically > refreshing with the changing of object's position).I kown ARCGIS has the > technique called dynamic diasplay(or something like that),which supports the > capacity to do such things. Is QGIS has this ability? Any advices would be > appreciated! > > Regards > Bob > > _______________________________________________ > Qgis-developer mailing list > Qgis-developer@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
