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Diffstat (limited to 'lib/gs/examples/man.erl')
| -rw-r--r-- | lib/gs/examples/man.erl | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/lib/gs/examples/man.erl b/lib/gs/examples/man.erl new file mode 100644 index 0000000000..a0ffd3364e --- /dev/null +++ b/lib/gs/examples/man.erl @@ -0,0 +1,192 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 1996-2009. 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% +%% + +%% +%% ------------------------------------------------------------ +%% Simple Manual Page Browser +%% ------------------------------------------------------------ + +-module(man). + +-export([start/0,init/0]). +-export([man_list/0]). +-export([browser/1,browser_init/2]). + + +start() -> + case whereis(man) of + undefined -> + register(man,Pid=spawn(man,init,[])), + Pid; + Pid -> + Pid + end. + + +%% ---- Man Directories ----- +dirManual() -> + filename:join([code:root_dir(), "man", "cat3"]). + + +%% ----- init ----- +init() -> + S=gs:start(), + Width=520,Height=520, + gs:create(window,win,S,[{title,"Manual Browser"}, + {width,Width},{height,Height}]), + gs:create(button,quit,win,[{width,60},{label,{text,"Quit"}}]), + gs:create(button,select,win,[{x,60},{label,{text,"Select Page"}}]), + gs:create(editor,editor,win,[{y,30},{width,Width},{height,Height-30}, + {hscroll,false},{vscroll,left}]), + gs:config(win,[{map,true},{configure,true}]), + man_loop(Width,Height). + +man_loop(Width0,Height0) -> + receive + {gs,_Win,configure,_,[Width0,Height0|_]} -> %% already got that size! + man_loop(Width0,Height0); + {gs,_Win,configure,_,[Width,Height|_]} -> + %%io:format("man: width=~w, height=~w ~n",[Width,Height]), + gs:config(editor,[{width,Width},{height,Height-30}]), + man_loop(Width,Height); + {gs,quit,click,_,_} -> + %%io:format("man: exiting.~n",[]), + exit(normal); + {gs,select,click,_,_} -> + case browser(man_list()) of + cancel -> true; + {ok,Page} -> load_page(Page); + O -> io:format("man: bad browser result: ~w~n",[O]) + end, + man_loop(Width0,Height0); + {gs,_,destroy,_,_} -> + exit(normal); + X -> + io:format("man: got other: ~w~n",[X]), + man_loop(Width0,Height0) + end. + + +%% ----- man_list ---- +%% +man_list() -> + {ok,FirstList} = file:list_dir(dirManual()), + SecondList = + mapfilter(fun(File) -> + case filename:extension(File) of + ".3" -> + {true, filename:basename(File, ".3")}; + _ -> false + end + end, + FirstList), + lists:sort(SecondList). + +mapfilter(Fun, [H|T]) -> + case Fun(H) of + {true, Val} -> + [Val|mapfilter(Fun, T)]; + false -> + mapfilter(Fun, T) + end; +mapfilter(_Fun, []) -> + []. + + +%% ------------------------------------------------------------ +%% Load in the Page + +load_page(Page) -> + %%io:format("man: load page start ~p.~n",[Page]), + Filename = filename:join([dirManual(),Page++".3"]), + {ok,Bin}=file:read_file(Filename), + _Txt=binary_to_list(Bin), + gs:config(editor,{enable,true}), + gs:config(editor,{load,Filename}), + gs:config(editor,{enable,false}), + %%io:format("man: load page done.~n",[]), + true. + + +%% ------------------------------------------------------------ +%% Simple Browser +%% ------------------------------------------------------------ + +browser(Items) -> + Browser=spawn_link(man,browser_init,[self(),Items]), + await_reply(Browser). + +await_reply(Browser) -> + receive + {browser,Result} -> + Result; + {gs,_,destroy,_,_} -> exit(normal); + {gs,quit,click,_,_} -> exit(normal); + {gs,select,click,_,_} -> + Browser ! wake_up, + await_reply(Browser) + end. + +browser_init(Pid,Items) -> + process_flag(trap_exit,true), + S=gs:start(), + Win=gs:window(win,S,[{width,250},{height,270},{title,"Browser"}]), + _Lbl=gs:label(Win,[{label,{text,"Select a Manual Page"}},{width,250}]), + gs:label(Win,[{width,40},{y,35},{label,{text,"Page:"}}]), + Entry=gs:entry(Win,[{y,35},{width,205},{x,40}, + {keypress,true},{focus,true}]), + Lb=gs:listbox(Win,[{x,5},{y,65},{width,160},{height,195}, + {vscroll,right},{click,true},{doubleclick,true}]), + Ok=gs:button(Win,[{label,{text,"OK"}},{width,40},{x,185},{y,175}]), + Cancel=gs:button(Win,[{label,{text,"Cancel"}},{x,175},{y,225},{width,65}]), + gs:config(Lb,[{items,Items}]), + gs:config(Win,{map,true}), + browser_loop(Pid,Ok,Cancel,Entry,Lb). + +browser_loop(Pid,Ok,Cancel,Entry,Lb) -> + receive + {gs,Ok,click,_,_} -> + Txt=gs:read(Entry,text), + Pid ! {browser,{ok,Txt}}; + {gs,Cancel,click,_,_} -> + Pid ! {browser,cancel}; + {gs,Entry,keypress,_,['Return'|_]} -> + Txt=gs:read(Entry,text), + Pid ! {browser,{ok,Txt}}; + {gs,Entry,keypress,_,_} -> + browser_loop(Pid,Ok,Cancel,Entry,Lb); + {gs,Lb,click,_,[_Idx, Txt| _Rest]} -> + gs:config(Entry,{text,Txt}), + browser_loop(Pid,Ok,Cancel,Entry,Lb); + {gs,Lb,doubleclick,_,[_Idx, Txt| _Rest]} -> + Pid ! {browser,{ok,Txt}}; + {gs,_,destroy,_,_} -> + Pid ! {browser,cancel}; + wake_up -> + gs:config(win,[{iconify,false},raise]), + browser_loop(Pid,Ok,Cancel,Entry,Lb); + {'EXIT',_Man,Why} -> + exit(Why); + X -> + io:format("man: browser got other: ~w.~n",[X]), + browser_loop(Pid,Ok,Cancel,Entry,Lb) + end. + +%% ------------------------------------------------------------ +%% end of man.erl |