topic Updating graphic layers in Qt Maps SDK Questions https://community.esri.com/t5/qt-maps-sdk-questions/updating-graphic-layers/m-p/709068#M3595 <HTML><HEAD></HEAD><BODY><P>This is a general question about the best methods to draw features that update within a graphics layer. &nbsp;For instance, I am interested in drawing a line of sight line that changes direction through time as I move a Q-slider. Should I have a pointer to a graphics overlay that I create a new instance of each time I want to redraw the line? &nbsp;Or is there a more elegant method for redrawing on a map?</P></BODY></HTML> Wed, 22 Feb 2017 18:01:44 GMT MichaelGreene2 2017-02-22T18:01:44Z Updating graphic layers https://community.esri.com/t5/qt-maps-sdk-questions/updating-graphic-layers/m-p/709068#M3595 <HTML><HEAD></HEAD><BODY><P>This is a general question about the best methods to draw features that update within a graphics layer. &nbsp;For instance, I am interested in drawing a line of sight line that changes direction through time as I move a Q-slider. Should I have a pointer to a graphics overlay that I create a new instance of each time I want to redraw the line? &nbsp;Or is there a more elegant method for redrawing on a map?</P></BODY></HTML> Wed, 22 Feb 2017 18:01:44 GMT https://community.esri.com/t5/qt-maps-sdk-questions/updating-graphic-layers/m-p/709068#M3595 MichaelGreene2 2017-02-22T18:01:44Z Re: Updating graphic layers https://community.esri.com/t5/qt-maps-sdk-questions/updating-graphic-layers/m-p/709069#M3596 <HTML><HEAD></HEAD><BODY><P>It would be best to have 1 graphics layer, and to have a renderer set on it defining how all the graphics in it should look. Then, have 1 graphic instance, where you continually just re-set the geometry on it. Create a new geometry each time the slider value&nbsp;changes and re-set it to the graphic, and it should update the graphic.</P></BODY></HTML> Wed, 22 Feb 2017 19:10:48 GMT https://community.esri.com/t5/qt-maps-sdk-questions/updating-graphic-layers/m-p/709069#M3596 LucasDanzinger 2017-02-22T19:10:48Z