Den 2016-11-29 kl. 04:04, skrev Robin Lee:
Hi,
I am learning to wrap a GObject-based library with gmmproc and encounter a
signal callback that comes with an argument of type GHashTable. But
there is
no wrapper for this type, so I am figuring out what to do next.
One straight approach is wrapping GHashTable like Glib::BalancedTree
for GTree.
But I also found that glibmm is following a trend that use std::vector
in API
instead of exposing wrappers of Glib data structures. So for
GHashTable, we
may replace the argument with type std::unordered_map, and make a
HashTableHandler for the conversion.
Any ideas?
-robin
Yes, the trend is to not wrap glib classes with the same functionality
as standard C++ classes. As an example, the Glib::Thread and
Glib::Threads::Thread classes have been deprecated, and will be removed
from the coming ABI-breaking glibmm-2.52 release, because there is the
std::thread class in C++11. I don't know why GTree was ever wrapped in
glibmm. The commit message of the commit that added it does not explain
why it was added, nor does it refer to a bug report.
The best approach is to use std::unordered_map in your library's API. If
you make a HashTableHandler, use it only internally in your library's
own code, like e.g. ArrayHandler is used in gtkmm-3.
Kjell
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