Merge branch 'zandra/stdlib/optional-callbacks/OTP-13801'

* zandra/stdlib/optional-callbacks/OTP-13801:
  wx: make wx_object callbacks optional
  stdlib: Make gen_fsm callbacks optional
  stdlib: Make gen_event callbacks optional
  stdlib: Make gen_server callbacks optional

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/wx/test/wx_oc_object.erl b/lib/wx/test/wx_oc_object.erl
new file mode 100644
index 0000000000..3924202410
--- /dev/null
+++ b/lib/wx/test/wx_oc_object.erl
@@ -0,0 +1,44 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
+%% See the License for the specific language governing permissions and
+%% limitations under the License
+%%
+%% %CopyrightEnd%
+%%
+-module(wx_oc_object).
+-include_lib("wx/include/wx.hrl").
+
+-behaviour(wx_object).
+
+%% gen_server callbacks
+-export([init/1]).
+
+-record(state, {}).
+
+init([]) ->
+    Init = fun() ->
+        Frame0 = wxFrame:new(wx:null(), ?wxID_ANY, "Test wx_object", [{size, {500, 400}}]),
+        Frame = wx_object:set_pid(Frame0, self()),
+        Sz = wxBoxSizer:new(?wxHORIZONTAL),
+        Panel = wxPanel:new(Frame),
+        wxSizer:add(Sz, Panel, [{flag, ?wxEXPAND}, {proportion, 1}]),
+        wxWindow:show(Frame),
+        {Frame, {Frame, Panel}}
+    end,
+    {Obj, _UserState} = Init(),
+    {Obj, #state{}};
+init([Init]) ->
+    {Obj, _UserState} = Init(),
+    {Obj, #state{}}.