wx_object
Module
Module Summary
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}
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};
...Exports
start(Name, Mod, Args, Options) -> wxWindow:wxWindow() | {error, term()}
Types
start_link(Mod, Args, Options) -> wxWindow:wxWindow() | {error, term()}
Types
start_link(Name, Mod, Args, Options) -> wxWindow:wxWindow() | {error, term()}
Types
Types
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
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.
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()
Make a call to a wx_object server with a timeout. Invokes handle_call(Request, From, State) in server
Types
set_pid(Obj, Pid::pid()) -> wx:wx_object()