Updating a Graphic in GraphicsLayer / thread safeness

ChristianEhrlicher

Hi,

we add a EsriRuntimeQt::Graphic to a EsriRuntimeQt::GraphicsLayer with GraphicsLayer::addGraphic(m_graphicPtr). Now we want to change the graphic (e.g. the line color). What's the recommended way to do this? The documentation does not say anything about this:

• simply modify m_graphicPtr (and hope the GraphicsLayer notices the change and updates it's graphical representation)
  • this would mean that all Functions for EsriRuntimeQt::Graphic must be thread-safe
  • or is there another synchronization mechanism
  • using updateGraphic with the same pointer used by addGraphic will lead to a crash (afaics addGraphic() moves ownership and updateGraphic() will delete the old graphic - at least this is what I'm seeing, the documentation only express this indirect with)
• create a new Graphic and replace the current one with EsriRuntimeQt::GraphicsLayer::updateGraphic()
• other ways I'm not aware of

Thx,

Christian

LucasDanzinger

Christian-

If you are wanting to update the symbol of a particular graphic, can you just use updateGraphic that takes in the graphic's ID and the new symbol? ArcGIS Runtime SDK for Qt C++ API: EsriRuntimeQt::GraphicsLayer Class Reference

Otherwise, you can create a new Graphic, and update the existing one with updateGraphic ArcGIS Runtime SDK for Qt C++ API: EsriRuntimeQt::GraphicsLayer Class Reference

That would be the recommended approach. I would need to see your code to get a hint at why it might be crashing.

-Luke