%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2012. 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%
%%
%%
%% ------------------------------------------------------------
%% Focus Demo
%% ------------------------------------------------------------
-module(focus_demo).
-compile([{nowarn_deprecated_function,{gs,config,2}},
{nowarn_deprecated_function,{gs,create,4}},
{nowarn_deprecated_function,{gs,read,2}},
{nowarn_deprecated_function,{gs,start,0}},
{nowarn_deprecated_function,{gs,window,2}}]).
-export([start/0,init/0]).
%% ----- File Selection ----
start() ->
spawn(focus_demo,init,[]).
init() ->
S=gs:start(),
Font = case gs:read(S,{choose_font,{screen,12}}) of
{screen,_,12} = Screen ->
Screen;
_ ->
gs:read(S,{choose_font,{courier,12}})
end,
Win=gs:window(S,[{title,"Focus Demo"},{width,200},{height,150}]),
gs:create(entry,e1,Win,[{y,0},{focus,true}]),
gs:create(entry,e2,Win,[{y,30},{focus,true}]),
gs:create(entry,e3,Win,[{y,60},{focus,true}]),
gs:create(entry,e4,Win,[{y,90},{focus,true}]),
gs:create(button,b1,Win,[{x,100},{width,30},
{label,{text,"e1"}},{font,Font}]),
gs:create(button,b2,Win,[{y,30},{x,100},{width,30},
{label,{text,"e2"}},{font,Font}]),
gs:create(button,b3,Win,[{y,60},{x,100},{width,30},
{label,{text,"e3"}},{font,Font}]),
gs:create(button,b4,Win,[{y,90},{x,100},{width,30},
{label,{text,"e4"}},{font,Font}]),
gs:create(button,clear,Win,[{y,120},{x,35},{width,50},
{label,{text,"Clear"}},{font,Font}]),
gs:create(button,ask,Win,[{y,120},{x,85},{width,30},
{label,{text,"?"}},{font,Font}]),
gs:create(button,quit,Win,[{y,120},{x,115},{width,50},
{label,{text,"Quit"}},{font,Font}]),
gs:config(Win,{map,true}),
loop().
loop() ->
receive
{gs,quit,_,_,_} -> exit(normal);
{gs,ask,_,_,_} ->
R1=gs:read(e1,setfocus),R2=gs:read(e2,setfocus),
R3=gs:read(e3,setfocus),R4=gs:read(e4,setfocus),
R= if R1==true -> e1;
R2==true -> e2;
R3==true -> e3;
R4==true -> e4;
true -> nobody
end,
io:format("Focus status: ~w has focus.~n",[R]);
{gs,clear,_,_,_} ->
gs:config(clear,{setfocus,true}),
io:format("Focus is cleared.~n",[]);
{gs,b1,_,_,_} -> gs:config(e1,{setfocus,true});
{gs,b2,_,_,_} -> gs:config(e2,{setfocus,true});
{gs,b3,_,_,_} -> gs:config(e3,{setfocus,true});
{gs,b4,_,_,_} -> gs:config(e4,{setfocus,true});
{gs,Id,focus,_,[0|_]} ->
io:format("~w lost focus.~n",[Id]);
{gs,Id,focus,_,[1|_]} ->
io:format("~w gained focus.~n",[Id]);
{gs,_,destroy,_,_} ->
exit(normal);
X ->
io:format("Got X=~w~n",[X])
end,
loop().
%% ----------------------------------------
%% done
