%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 2008-2009. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. %% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. %% %% %CopyrightEnd% %%%------------------------------------------------------------------- %%% File : wx.erl %%% Author : Dan Gudmundsson %%% Description : %%% %%% Created : 22 Feb 2007 by Dan Gudmundsson %%%------------------------------------------------------------------- %% @doc A port of wxWidgets. %% %% This is the base api of wxWidgets. %% This module contains functions for %% starting and stopping the wx-server, as well as other utility functions. %% %% wxWidgets is object oriented, and not functional. Thus, in wxErlang a %% module represents a class, and the object created by this class %% has an own type, wxCLASS(). This module represents the base %% class, and all other wxMODULE's are sub-classes of this class. %% %% Objects of a class are created with wxCLASS:new(...) and destroyed with %% wxCLASS:destroy(). Member functions are called with wxCLASS:member(Object, ...) %% instead of as in C++ Object.member(...). %% %% Sub class modules inherit (non static) functions from their parents. %% The inherited functions are not documented in the sub-classes. %% %% This erlang port of wxWidgets tries to be a one-to-one mapping with %% the original wxWidgets library. Some things are different though, %% as the optional arguments use property lists and can be in any %% order. The main difference is the event handling which is different %% from the original library. See {@link wxEvtHandler}. %% %% The following classes are implemented directly as erlang types:
%% wxPoint={x,y},wxSize={w,h},wxRect={x,y,w,h},wxColour={r,g,b [,a]}, %% wxString={@link //stdlib/unicode:charlist()}, %% wxGBPosition={r,c},wxGBSpan={rs,cs},wxGridCellCoords={r,c}. %% %% wxWidgets uses a process specific environment, which is created by %% {@link wx:new/0}. To be able to use the environment from other %% processes, call {@link get_env/0} to retrieve the environment and %% {@link set_env/1} to assign the environment in the other process. %% %% Global (classless) functions are located in the wx_misc module. %% @type wxObject(). Opaque object %% @type wx_env(). Wx process environment %% @type wx_mem(). Wx memory area %% @type colour(). A 3 or 4 tuple: {R,G,B,A} or as argument {R,G,B} is also accepted %% where each colour channel is a an integer between 0-255. %% @type datetime(). {{Year,Month,Day}, {Hour,Minute,Second}} in local timezone. %% @type mouseState(). See #wxMouseState{} defined in wx.hrl -module(wx). -export([parent_class/1, new/0, new/1, destroy/0, get_env/0,set_env/1, debug/1, batch/1,foreach/2,map/2,foldl/3,foldr/3, getObjectType/1, typeCast/2, null/0, is_null/1]). -export([create_memory/1, get_memory_bin/1, retain_memory/1, release_memory/1]). -export([demo/0]). -include("wxe.hrl"). %% @hidden parent_class(_) -> true. %% Let the null pointers be sent down. %% @spec () -> wxObject() %% @doc Starts a wx server. new() -> new([]). %% @spec ([Option]) -> wxObject() %% @doc Starts a wx server. %% Option may be {debug, Level}, see debug/1. new(Options) when is_list(Options) -> #wx_env{} = wxe_server:start(), Debug = proplists:get_value(debug, Options, 0), debug(Debug), null(). %% @spec () -> ok %% @doc Stops a wx server. destroy() -> wxe_server:stop(), erase(?WXE_IDENTIFIER), ok. %% @spec () -> wx_env() %% @doc Gets this process's current wx environment. %% Can be sent to other processes to allow them use this process wx environment. %% @see set_env/1 get_env() -> case get(?WXE_IDENTIFIER) of undefined -> erlang:error({wxe,unknown_port}); Env = #wx_env{} -> Env end. %% @spec (wx_env()) -> ok %% @doc Sets the process wx environment, allows this process to use %% another process wx environment. set_env(#wx_env{sv=Pid} = Env) -> put(?WXE_IDENTIFIER, Env), %% wxe_util:cast(?REGISTER_PID, <<>>), wxe_server:register_me(Pid), ok. %% @spec () -> wxObject() %% @doc Returns the null object null() -> #wx_ref{ref=0, type=wx}. %% @spec (wxObject()) -> boolean() %% @doc Returns true if object is null, false otherwise is_null(#wx_ref{ref=NULL}) -> NULL =:= 0. %% @spec (wxObject()) -> atom() %% @doc Returns the object type getObjectType(#wx_ref{type=Type}) -> Type. %% @spec (wxObject(), atom()) -> wxObject() %% @doc Casts the object to class NewType. %% It is needed when using functions like wxWindow:findWindow/2, which %% returns a generic wxObject type. typeCast(Old=#wx_ref{}, NewType) when is_atom(NewType) -> Old#wx_ref{type=NewType}. %% @spec (function()) -> term() %% @doc Batches all wx commands %% used in the fun. Improves performance of the command processing by %% grabbing the wxWidgets thread so that no event processing will be %% done before the complete batch of commands is invoked. %% %% @see map/2 %% @see foreach/2 %% @see foldl/3 %% @see foldr/3 batch(Fun) -> ok = wxe_util:cast(?BATCH_BEGIN, <<>>), try Fun() catch error:W -> erlang:exit({W, erlang:get_stacktrace()}); throw:W -> erlang:throw(W); exit:W -> erlang:exit(W) after ok = wxe_util:cast(?BATCH_END, <<>>) end. %% @spec (function(), list()) -> ok %% @doc Behaves like {@link //stdlib/lists:foreach/2} but batches wx commands. See {@link batch/1}. foreach(Fun, List) -> ok = wxe_util:cast(?BATCH_BEGIN, <<>>), try lists:foreach(Fun, List) catch error:W -> erlang:exit({W, erlang:get_stacktrace()}); throw:W -> erlang:throw(W); exit:W -> erlang:exit(W) after ok = wxe_util:cast(?BATCH_END, <<>>) end. %% @spec (function(), list()) -> list() %% @doc Behaves like {@link //stdlib/lists:map/2} but batches wx commands. See {@link batch/1}. map(Fun, List) -> ok = wxe_util:cast(?BATCH_BEGIN, <<>>), try lists:map(Fun, List) catch error:W -> erlang:exit({W, erlang:get_stacktrace()}); throw:W -> erlang:throw(W); exit:W -> erlang:exit(W) after ok = wxe_util:cast(?BATCH_END, <<>>) end. %% @spec (function(), term(), list()) -> term() %% @doc Behaves like {@link //stdlib/lists:foldl/3} but batches wx commands. See {@link batch/1}. foldl(Fun, Acc, List) -> ok = wxe_util:cast(?BATCH_BEGIN, <<>>), try lists:foldl(Fun, Acc, List) catch error:W -> erlang:exit({W, erlang:get_stacktrace()}); throw:W -> erlang:throw(W); exit:W -> erlang:exit(W) after ok = wxe_util:cast(?BATCH_END, <<>>) end. %% @spec (function(), term(), list()) -> term() %% @doc Behaves like {@link //stdlib/lists:foldr/3} but batches wx commands. See {@link batch/1}. foldr(Fun, Acc, List) -> ok = wxe_util:cast(?BATCH_BEGIN, <<>>), try lists:foldr(Fun, Acc, List) catch error:W -> erlang:exit({W, erlang:get_stacktrace()}); throw:W -> erlang:throw(W); exit:W -> erlang:exit(W) after ok = wxe_util:cast(?BATCH_END, <<>>) end. -define(MIN_BIN_SIZE, 64). %% Current emulator min off heap size %% @spec (integer()) -> wx_memory() %% @doc Creates a memory area (of Size in bytes) which can be used by an external library (i.e. opengl). %% It is up to the client to keep a reference to this object so it does %% not get garbage collected by erlang while still in use by the external %% library. %% %% This is far from erlang's intentional usage and can crash the erlang emulator. %% Use it carefully. create_memory(Size) when Size > ?MIN_BIN_SIZE -> #wx_mem{bin = <<0:(Size*8)>>, size = Size}; create_memory(Size) -> #wx_mem{bin = <<0:((?MIN_BIN_SIZE+1)*8)>>, size = Size}. %% @spec (wx_memory()) -> binary() %% @doc Returns the memory area as a binary. get_memory_bin(#wx_mem{bin=Bin, size=Size}) when Size > ?MIN_BIN_SIZE -> Bin; get_memory_bin(#wx_mem{bin=Bin, size=Size}) -> <> = Bin, WithCorrectSize. %% @spec (wx_memory()) -> ok %% @doc Saves the memory from deletion until release_memory/1 is called. %% If release_memory/1 is not called the memory will not be garbage collected. retain_memory(#wx_mem{bin=Bin}) -> wxe_util:send_bin(Bin), ok = wxe_util:cast(?WXE_BIN_INCR, <<>>); retain_memory(Bin) when is_binary(Bin) -> case byte_size(Bin) > ?MIN_BIN_SIZE of true -> ok; false -> erlang:error(small_bin) end, wxe_util:send_bin(Bin), ok = wxe_util:cast(?WXE_BIN_INCR, <<>>). release_memory(#wx_mem{bin=Bin}) -> wxe_util:send_bin(Bin), ok = wxe_util:cast(?WXE_BIN_DECR, <<>>); release_memory(Bin) when is_binary(Bin) -> wxe_util:send_bin(Bin), ok = wxe_util:cast(?WXE_BIN_DECR, <<>>). %% @spec (Level::term()) -> ok %% Level = none | verbose | trace | driver | [Level] %% @doc Sets debug level. If debug level is verbose or trace %% each call is printed on console. If Level is driver each allocated %% object and deletion is printed on the console. debug(none) -> debug(0); debug(verbose) -> debug(1); debug(trace) -> debug(2); debug(driver) -> debug(16); debug([]) -> debug(0); debug(List) when is_list(List) -> {Drv,Erl} = lists:foldl(fun(verbose, {Drv,_Erl}) -> {Drv,1}; (trace, {Drv,_Erl}) -> {Drv,2}; (driver, {_Drv,Erl}) -> {16, Erl} end, {0,0}, List), debug(Drv + Erl); debug(Level) when is_integer(Level) -> case get(?WXE_IDENTIFIER) of undefined -> erlang:error({wxe,unknown_port}); #wx_env{debug=Old} when Old =:= Level -> ok; Env = #wx_env{sv=Server, port=Port, debug=Old} -> if Old > 16, Level > 16 -> ok; Old < 16, Level < 16 -> ok; true -> erlang:port_call(Port,?WXE_DEBUG_DRIVER, [Level bsr 4]) end, put(?WXE_IDENTIFIER, Env#wx_env{debug=Level}), wxe_server:set_debug(Server,Level), ok end. %% @spec () -> ok %% @doc Starts a wxErlang demo if examples directory exists and is compiled demo() -> Priv = code:priv_dir(wx), Demo = filename:join([filename:dirname(Priv),examples,demo]), Mod = list_to_atom("demo"), %% Fool xref tests case file:set_cwd(Demo) of ok -> apply(Mod, start, []); _ -> {error, no_demo_dir} end.