wx_object - Generic wx object behaviour.

wx_object - Generic wx object behaviour

This is a behaviour module that can be used for "sub classing" wx objects. It works like a regular gen_server module and creates a server per object.

NOTE: Currently no form of inheritance is implemented.

The user module should export:

init(Args) should return
{wxWindow, State} | {wxWindow, State, Timeout} | ignore | {stop, Reason}

Asynchronous window event handling:
handle_event(#wx{}, State) should return
{noreply, State} | {noreply, State, Timeout} | {stop, Reason, State}

The user module can export the following callback functions:

handle_call(Msg, {From, Tag}, State) should return
{reply, Reply, State} | {reply, Reply, State, Timeout} | {noreply, State} | {noreply, State, Timeout} | {stop, Reason, Reply, State}

handle_cast(Msg, State) should return
{noreply, State} | {noreply, State, Timeout} | {stop, Reason, State}

If the above are not exported but called, the wx_object process will crash. The user module can also export:

Info is message e.g. {'EXIT', P, R}, {nodedown, N}, ...
handle_info(Info, State) should return , ...
{noreply, State} | {noreply, State, Timeout} | {stop, Reason, State}

If a message is sent to the wx_object process when handle_info is not exported, the message will be dropped and ignored.

When stop is returned in one of the functions above with Reason = normal | shutdown | Term, terminate(State) is called. It lets the user module clean up, it is always called when server terminates or when wx_object() in the driver is deleted. If the Parent process terminates the Module:terminate/2 function is called.
terminate(Reason, State)

Example:

  -module(myDialog).
  -export([new/2, show/1, destroy/1]).  %% API
  -export([init/1, handle_call/3, handle_event/2,
           handle_info/2, code_change/3, terminate/2]).
           new/2, showModal/1, destroy/1]).  %% Callbacks

  %% Client API
  new(Parent, Msg) ->
     wx_object:start(?MODULE, [Parent,Id], []).

  show(Dialog) ->
     wx_object:call(Dialog, show_modal).

  destroy(Dialog) ->
     wx_object:call(Dialog, destroy).

  %% Server Implementation ala gen_server
  init([Parent, Str]) ->
     Dialog = wxDialog:new(Parent, 42, "Testing", []),
     ...
     wxDialog:connect(Dialog, command_button_clicked),
     {Dialog, MyState}.

  handle_call(show, _From, State) ->
     wxDialog:show(State#state.win),
     {reply, ok, State};
  ...
  handle_event(#wx{}, State) ->
     io:format("Users clicked button~n",[]),
     {noreply, State};
  ...

DATA TYPES

• request_id() = term()

• server_ref() = wx:wx_object() | atom() | pid()