Handle nonexistent node position in graph visualization (#1187)

* Handle nonexistent node position in graph visualization

Add check for node position on hover before creating the tooltip

* Increase Agents version

Author: jmaspons

Project.toml

@@ -1,7 +1,7 @@
 name = "Agents"
 uuid = "46ada45e-f475-11e8-01d0-f70cc89e6671"
 authors = ["George Datseris", "Tim DuBois", "Aayush Sabharwal", "Ali Vahdati", "Adriano Meligrana"]
-version = "6.3.0"
+version = "6.3.1"
 
 [deps]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"

ext/AgentsGraphVisualizations/src/spaces/graph.jl

@@ -74,6 +74,9 @@ function Makie.show_data(inspector::DataInspector,
     gp = p.plots[findfirst(x -> isa(x, GraphMakie.GraphPlot), p.plots)]
     # get position (Int) matching currently hovered node position (Point2f/Point3f)
     node_pos = findfirst(==(pos), gp.node_pos[])
+    if isnothing(node_pos)
+        return false
+    end
 
     model = p.abmobs[].model[]
     a = inspector.plot.attributes