Keep Julia ownership when setting values in a JuliaPropertyMap

Fixes Segfault when exiting Julia after replacing a JuliaItemModel #218

Author: barche

Project.toml

@@ -1,6 +1,6 @@
 name = "QML"
 uuid = "2db162a6-7e43-52c3-8d84-290c1c42d82a"
-version = "0.13.1"
+version = "0.13.2"
 authors = ["Bart Janssens <bart@bartjanssens.org>"]
 
 [deps]
@@ -30,7 +30,7 @@ MacroTools = "0.5"
 Observables = "0.5"
 Qt6Svg_jll = "6.10"
 Qt6Wayland_jll = "6.10"
-jlqml_jll = "0.10.2"
+jlqml_jll = "0.10.3"
 julia = "1.10"
 
 [extras]

src/QML.jl

@@ -330,6 +330,10 @@ end
 # QQmlPropertyMap indexing interface
 Base.getindex(propmap::QQmlPropertyMap, key::AbstractString) = value(value(propmap, key))
 Base.setindex!(propmap::QQmlPropertyMap, val, key::AbstractString) = insert(propmap, QString(key), QVariant(val))
+function Base.setindex!(propmap::QQmlPropertyMap, val::QObject, key::AbstractString)
+  insert(propmap, QString(key), QVariant(val))
+  setObjectOwnership(CxxPtr(val), CppOwnership)
+end
 Base.setindex!(propmap::QQmlPropertyMap, val::QVariant, key::AbstractString) = insert(propmap, key, val)
 Base.setindex!(propmap::QQmlPropertyMap, val::Irrational, key::AbstractString) = (propmap[key] = convert(Float64, val))