topic How to query the Message Processor/Layer (mil2525c)? in Qt Maps SDK Questions https://community.esri.com/t5/qt-maps-sdk-questions/how-to-query-the-message-processor-layer-mil2525c/m-p/139010#M649 <HTML><HEAD></HEAD><BODY><P>We use the ArcGIS SDK for Qt to display nautical maps from a WMS Server. On top of the actual map, we have a MessageGroupLayer for mil2525c messages. The messages are rendered just fine, but how do i query them? For example i want to enable the user to click on a message on the map to get more Information about it. How do i do that?</P><P>How do i get a message at or near a certain location?</P></BODY></HTML> Wed, 10 Aug 2016 07:10:28 GMT JohannesOhlemacher 2016-08-10T07:10:28Z How to query the Message Processor/Layer (mil2525c)? https://community.esri.com/t5/qt-maps-sdk-questions/how-to-query-the-message-processor-layer-mil2525c/m-p/139010#M649 <HTML><HEAD></HEAD><BODY><P>We use the ArcGIS SDK for Qt to display nautical maps from a WMS Server. On top of the actual map, we have a MessageGroupLayer for mil2525c messages. The messages are rendered just fine, but how do i query them? For example i want to enable the user to click on a message on the map to get more Information about it. How do i do that?</P><P>How do i get a message at or near a certain location?</P></BODY></HTML> Wed, 10 Aug 2016 07:10:28 GMT https://community.esri.com/t5/qt-maps-sdk-questions/how-to-query-the-message-processor-layer-mil2525c/m-p/139010#M649 JohannesOhlemacher 2016-08-10T07:10:28Z Re: How to query the Message Processor/Layer (mil2525c)? https://community.esri.com/t5/qt-maps-sdk-questions/how-to-query-the-message-processor-layer-mil2525c/m-p/139011#M650 <HTML><HEAD></HEAD><BODY><P>Hi Johannes,</P><P></P><P>Once you start sending messages into the MessageGroupLayer, a new GraphicsLayer is created for the different geometry types. The MessageGroupLayer then becomes basically a GroupLayer of GraphicsLayers. What you can do is get the individual layer out of the MessageGroupLayer with GroupLayerBase::getLayers, then static_cast the one you want to GraphicsLayer. Once you have a GraphicsLayer, you can call graphicIds, and pass in your screen coordinates from a mouse click event, and it will return a list of graphic IDs that you clicked near.</P><P></P><P>- Luke</P></BODY></HTML> Wed, 10 Aug 2016 21:47:38 GMT https://community.esri.com/t5/qt-maps-sdk-questions/how-to-query-the-message-processor-layer-mil2525c/m-p/139011#M650 LucasDanzinger 2016-08-10T21:47:38Z