%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2011-2017. 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_obj_test).
-include_lib("wx/include/wx.hrl").
-export([start/1, stop/1, who_are_you/1]).
%% wx_object callbacks
-export([init/1, handle_info/2, terminate/2, code_change/3, handle_call/3,
handle_sync_event/3, handle_event/2, handle_cast/2]).
-record(state, {parent, me, opts, user_state}).
start(Opts) ->
wx_object:start_link(?MODULE, [{parent, self()}| Opts], []).
stop(Object) ->
wx_object:stop(Object).
who_are_you(Object) ->
wx_object:call(Object, who_are_you).
init(Opts) ->
Parent = proplists:get_value(parent, Opts),
put(parent_pid, Parent),
Init = proplists:get_value(init, Opts),
{Obj, UserState} = Init(),
{Obj, #state{me=Obj, parent=Parent, opts=Opts, user_state=UserState}}.
handle_sync_event(Event = #wx{obj=Panel, event=#wxPaint{}},
WxEvent, #state{parent=Parent, user_state=US, opts=Opts}) ->
case proplists:get_value(redraw, Opts) of
undefined ->
DC=wxPaintDC:new(Panel), %% We must create & destroy paintDC, or call wxEvent:skip(WxEvent))
wxPaintDC:destroy(DC), %% in sync_event. Otherwise wx on windows keeps sending the events.
Parent ! {sync_event, Event, WxEvent};
Redraw ->
Redraw(Event, WxEvent, US)
end,
ok;
handle_sync_event(Event, WxEvent, #state{parent=Parent}) ->
Parent ! {sync_event, Event, WxEvent},
ok.
handle_event(Event, State = #state{parent=Parent}) ->
Parent ! {event, Event},
{noreply, State}.
handle_call(who_are_you, _From, State = #state{me=Me}) ->
{reply, Me, State};
handle_call(What, From, State = #state{user_state=US}) when is_function(What) ->
Result = What(US),
{reply, {call, Result, From}, State};
handle_call(What, From, State) ->
{reply, {call, What, From}, State}.
handle_cast(What, State = #state{parent=Pid, user_state=US}) when is_function(What) ->
Result = What(US),
Pid ! {cast, Result},
{noreply, State};
handle_cast(What, State = #state{parent=Pid}) ->
Pid ! {cast, What},
{noreply, State}.
handle_info({call_undef_fun, {Mod, Fun}}, State) ->
Mod:Fun(),
{noreply, State};
handle_info(What, State = #state{parent=Pid}) ->
Pid ! {info, What},
{noreply, State}.
terminate(What, #state{parent=Pid, opts=Opts, user_state=US}) ->
case proplists:get_value(terminate, Opts) of
undefined ->
ok;
{Mod, Fun} ->
Mod:Fun();
Terminate ->
Terminate(US)
end,
Pid ! {terminate, What},
ok.
code_change(Ver1, Ver2, State = #state{parent=Pid}) ->
Pid ! {code_change, Ver1, Ver2},
State.
