Doxygen would still generate xml for private_api::ArrayModel and would
try to resolve a reference to iself, which is not possible because we've
excluded the namespace:
```
stderr: (!) Critical error while generating the file for [/home/vagrant/sixtyfps/target/cppdocs/api/classsixtyfps_1_1Model.rst].Traceback (most recent call last):
File "/home/vagrant/.local/share/virtualenvs/docs-4wjFCyEr/lib/python3.8/site-packages/exhale/graph.py", line 2591, in generateSingleNodeRST
gen_file.write("{0}\n".format(node.baseOrDerivedListString(
File "/home/vagrant/.local/share/virtualenvs/docs-4wjFCyEr/lib/python3.8/site-packages/exhale/graph.py", line 393, in baseOrDerivedListString
link=nodeByRefid[refid].link_name
KeyError: 'classsixtyfps_1_1private__api_1_1ArrayModel'
```
Making the entire class as \private works around it.
Oddly, this isn't needed for IntModel, perhaps because it's not a template?
Move those two classes into the private_api namespace, which is excluded
from the API reference documentation.
For generate code the explicit qualification of Property<T> is changed,
for the cbindgen generated item types the private_api namespace is
pulled into the cbindgen_private namespace.
A few problem:
- the horizontal and vertical property were swapped
- The implementation of the "preferred_xxx" property was not materialized properly
because the `bindings` were borrowed in the materialize_fake_properties pass
- Since the Window has a stretch factor of 0., the preferred size of the inner layout
was not taken into account when merging the LayoutInfo. I believe taking the
maximum preferred size is the right solution when merging them.
The item tree is intended to be initialized with pointers to the item
vtables, which are implemented using data relocation records that
resolve to the symbols exported by the sixtyfps_cpp shared library.
On windows, according to
https://docs.microsoft.com/en-us/cpp/c-language/rules-and-limitations-for-dllimport-dllexport?view=msvc-160
such data relocations are not supported, so this patch implements the
fallback through getter functions.
I can't seem to convince sphinx/breathe/doxygen to include them like
they work in the class docs.
I tried the markdown quotes, spaces, \code/\endcode, \rst/\endrst but no luck yet.
