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<body class='hmmessage'><div dir='ltr'><div>Hi Martin,</div><div> I'm sorry to ask you again.</div><div> I looked up QgsRubberBand class, it has 5 Geometry types: Point, Line, Polygon, UnknownGeometry, NoGeometry. It seems there's no way to add a svg symbol as a car icon on the map, or I was on a wrong way? </div><div> Here is some questions:</div><div> 1, How to add a svg symbol as a instance's icon? I tried QgssvgmarkerSymbolLayerV2 class, but it didn't display.</div><div> 2, How to draw a line or polygon using QgsRubberBand? I constructed a QgsRubberband instance, set some attributes, however it was not display.</div><div> Sorry to bother you.</div><div><br></div><div>Best Regards</div><div>Bob</div><br><div>> Date: Tue, 19 Aug 2014 10:44:04 +0700<br>> Subject: Re: [Qgis-developer] Is QGIS supports dynamic display?<br>> From: wonder.sk@gmail.com<br>> To: niubob@hotmail.com<br>> CC: qgis-developer@lists.osgeo.org<br>> <br>> Hi Bob<br>> <br>> QGIS allows you to have dynamic objects on top of map canvas. These<br>> objects are called map canvas items, having QgsMapCanvasItem as a base<br>> class. You can either implement your own item or use an existing<br>> implementation, e.g. QgsRubberBand class (used for example to<br>> highlight features when doing identification). In your case, you could<br>> have one QgsRubberBand instance and just change its position on map<br>> whenever appropriate.<br>> <br>> Cheers<br>> Martin<br>> <br>> <br>> On Mon, Aug 11, 2014 at 9:11 AM, ÌÚ·É Å£ <niubob@hotmail.com> wrote:<br>> > Dear all,<br>> > I'm a new developer of QGIS using C++. I am doing a project which needs<br>> > dynamically displaying maps/layers(just like GPS,layers automatically<br>> > refreshing with the changing of object's position).I kown ARCGIS has the<br>> > technique called dynamic diasplay(or something like that),which supports the<br>> > capacity to do such things. Is QGIS has this ability? Any advices would be<br>> > appreciated!<br>> ><br>> > Regards<br>> > Bob<br>> ><br>> > _______________________________________________<br>> > Qgis-developer mailing list<br>> > Qgis-developer@lists.osgeo.org<br>> > http://lists.osgeo.org/mailman/listinfo/qgis-developer<br></div> </div></body>
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