wx_object

MODULE

wx_object

MODULE SUMMARY

wx_object - Generic wx object behaviour.

DESCRIPTION

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
{wxObject, State} | {wxObject, State, Timeout} | ignore | {stop, Reason}

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

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

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

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};
  ...

EXPORTS

start(Name, Mod, Args, Options) -> wxWindow:wxWindow() | {error, term()}

Types:

Name = {local, atom()}

Mod = atom()

Args = term()

Flag = trace | log | {logfile, string()} | statistics | debug

Options = [{timeout, timeout()} | {debug, [Flag]}]

Starts a generic wx_object server and invokes Mod:init(Args) in the new process.

start_link(Mod, Args, Options) -> wxWindow:wxWindow() | {error, term()}

Types:

Mod = atom()

Args = term()

Flag = trace | log | {logfile, string()} | statistics | debug

Options = [{timeout, timeout()} | {debug, [Flag]}]

Starts a generic wx_object server and invokes Mod:init(Args) in the new process.

start_link(Name, Mod, Args, Options) -> wxWindow:wxWindow() | {error, term()}

Types:

Name = {local, atom()}

Mod = atom()

Args = term()

Flag = trace | log | {logfile, string()} | statistics | debug

Options = [{timeout, timeout()} | {debug, [Flag]}]

Starts a generic wx_object server and invokes Mod:init(Args) in the new process.

stop(Obj) -> ok

Types:

Obj = wx:wx_object() | atom() | pid()

Stops a generic wx_object server with reason 'normal'. Invokes terminate(Reason,State) in the server. The call waits until the process is terminated. If the process does not exist, an exception is raised.

stop(Obj, Reason, Timeout) -> ok

Types:

Obj = wx:wx_object() | atom() | pid()

Reason = term()

Timeout = timeout()

Stops a generic wx_object server with the given Reason. Invokes terminate(Reason,State) in the server. The call waits until the process is terminated. If the call times out, or if the process does not exist, an exception is raised.

call(Obj, Request) -> term()

Types:

Obj = wx:wx_object() | atom() | pid()

Request = term()

Make a call to a wx_object server. The call waits until it gets a result. Invokes handle_call(Request, From, State) in the server

call(Obj, Request, Timeout) -> term()

Types:

Obj = wx:wx_object() | atom() | pid()

Request = term()

Timeout = integer()

Make a call to a wx_object server with a timeout. Invokes handle_call(Request, From, State) in server

cast(Obj, Request) -> ok

Types:

Obj = wx:wx_object() | atom() | pid()

Request = term()

Make a cast to a wx_object server. Invokes handle_cast(Request, State) in the server

get_pid(Obj) -> pid()

Types:

Obj = wx:wx_object() | atom() | pid()

Get the pid of the object handle.

set_pid(Obj, Pid::pid()) -> wx:wx_object()

Types:

Obj = wx:wx_object() | atom() | pid()

Sets the controlling process of the object handle.

reply(X1::{pid(), Tag::term()}, Reply::term()) -> pid()

Get the pid of the object handle.