The R13B03 release.OTP_R13B03

1 files changed, 255 insertions, 0 deletions

diff --git a/lib/gs/examples/file_dialog.erl b/lib/gs/examples/file_dialog.erl
new file mode 100644
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+++ b/lib/gs/examples/file_dialog.erl
@@ -0,0 +1,255 @@
+%%
+%% %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%
+%%
+
+%%
+%% ------------------------------------------------------------
+%% File Selection Dialog
+%% ------------------------------------------------------------
+
+-module(file_dialog).
+
+-export([start/0,start/1,start/2,fs_init/3]).
+
+-include_lib("kernel/include/file.hrl").
+
+
+%% ----- File Selection ----
+start() ->
+    {ok,Dir}=file:get_cwd(),
+    start(Dir,[]).
+
+start(Dir) ->
+    start(Dir,[]).
+
+start(Dir,File) ->
+    Dir0 = case lists:last(Dir) of
+	$/ -> Dir;
+	_  -> lists:append(Dir,"/")
+    end,
+    Pid=spawn(file_dialog,fs_init,[Dir0,File,self()]),	
+    receive
+	{file_dialog,Pid,Result} -> Result
+    end.
+
+
+%% ------------------------------------------------------------
+fs_init(Dir,File,Owner) ->
+    S=gs:start(),
+    gs:create(window,win,S,[{width,250},{height,265},{title,"File Dialog"},
+			    {configure,true}]),
+    gs:create(label,label,win,[{y,0},{width,250},{label, {text,Dir}}]),
+    gs:label(win,[{width,50},{y,30},{x,5},{label, {text,"File:"}}]),
+    gs:create(entry,entry,win,[{y,30},{width,190},{x,55},
+			{keypress,true},{focus,true}]),
+    gs:create(listbox,lb,win,[{x,5},{y,60},{width,160},{height,199},
+			   {vscroll,right},{click,true},{doubleclick,true}]),
+    gs:create(button,ok,win,[{label, {text,"OK"}},{width,40},{x,185},{y,170}]),
+    gs:create(button,cancel,win,[{label, {text,"Cancel"}},{x,175},{y,220},{width,65}]),
+    Items=refresh(Dir),
+    %% --- select File if it's given ---
+    case index_member(File,Items) of
+	{ok,Index} ->
+	    gs:config(lb,{selection,clear}),
+	    gs:config(lb,{selection,Index});
+	_ -> true
+    end,
+    gs:config(win,{map,true}),
+    fs_loop(Dir,Owner).
+
+fs_loop(Dir,Owner) ->
+    receive
+	{gs,ok,click,_,_} ->
+	    entered_name(Dir,Owner);
+	{gs,cancel,click,_,_} ->
+	    Owner ! {file_dialog,self(),cancel};
+	{gs,entry,keypress,_,['Return'|_]} ->
+	    entered_name(Dir,Owner);
+	{gs,entry,keypress,_,[_Keysym|_]} ->
+	    fs_loop(Dir,Owner);
+	{gs,lb,click,_,_} ->
+	    clicked(Dir,Owner);
+	{gs,lb,doubleclick,_,_} ->
+	    double_clicked(Dir,Owner);
+	{gs,win,configure,_,[250,265|_]} -> % already got that size
+	    fs_loop(Dir,Owner);
+	{gs,win,configure,_,_} ->
+	    gs:config(win,[{geometry,{250,265}}]),
+	    fs_loop(Dir,Owner);
+	stop ->
+	    exit(normal);
+	{gs,_,destroy,_,_} -> 
+	    Owner ! {file_dialog,self(),cancel};
+	X ->
+	    io:format("file_dialog: got other: ~w.~n",[X]),
+	    fs_loop(Dir,Owner)
+    end.
+
+
+
+refresh(Dir) ->
+    gs:config(lb,clear),
+    gs:config(label,{label, {text,Dir}}),
+    gs:config(entry,{text,""}),
+    Items=["../"|get_files(Dir)],
+    gs:config(lb,[{items,Items}]),
+    Items.
+
+    
+entered_name(Dir,Owner) ->
+    File=gs:read(entry,text),
+    case check_file(Dir,File) of
+	{file,Dir2,File2} ->
+	    Owner ! {file_dialog,self(),{ok,Dir2,File2}};
+	{dir,Dir2} ->
+	    refresh(Dir2),
+	    fs_loop(Dir2,Owner);
+	{error,no_file} ->
+	    double_clicked(Dir,Owner);
+	_ ->
+	    fs_loop(Dir,Owner)
+    end.
+
+
+clicked(Dir,Owner) ->
+    [Idx|_]=gs:read(lb,selection),
+    File=gs:read(lb,{get,Idx}),
+    case lists:last(File) of
+	$/ -> %it's a dir
+	    true;
+	_ -> % it's a file
+	    gs:config(entry,{text,File})
+    end,
+    fs_loop(Dir,Owner).
+
+
+double_clicked(Dir,Owner) ->
+    case gs:read(lb,selection) of
+	[0] -> % up one dir
+	    NewDir=up_one_dir(Dir),
+	    refresh(NewDir),
+	    fs_loop(NewDir,Owner);
+	[] ->
+	    fs_loop(Dir,Owner);
+	[Idx] ->
+	    File=gs:read(lb,{get,Idx}),
+	    case lists:last(File) of
+		$/ -> % down a dir
+		    NewDir=lists:append(Dir,File),
+		    refresh(NewDir),
+		    fs_loop(NewDir,Owner);
+		_ -> % done
+		    Owner!{file_dialog,self(),{ok,Dir,File}}
+	    end
+    end.
+
+
+%% checks if a file exists
+%% returns {file,Dir,File}
+%%         {dir,Dir}
+%%    or   {error,What}
+check_file(Dir,File) ->
+    case catch lists:last(File) of
+	$/ -> % File is a Dir
+	    NewDir = case File of
+			 [$/|_] -> %absolute path
+			     File;
+			 _ -> %relative path
+			     lists:append(Dir,File)
+	    end,
+	    case file:list_dir(NewDir) of
+		{ok,_} -> {dir,NewDir};
+		_      -> {error,bad_dir}
+	    end;
+	{'EXIT',_Why} -> {error,no_file};
+	_ ->
+	    Words=string:tokens(File,[$/,$\\]),
+	    NewFile=lists:last(Words),
+	    NewDir = case File of
+		[$/|_] -> %absolute path
+		    up_one_dir(File);
+		_ -> %relative path
+		    case up_one_dir(File) of
+			[$/]        -> Dir;
+			[$/|SubDir] -> lists:flatten([Dir,SubDir,$/])
+		    end
+	    end,
+	    case file:read_file_info(lists:append(NewDir,NewFile)) of
+		{ok,_} -> 
+		    {file,NewDir,NewFile};
+		_ -> 
+		    {error,bad_file}
+	    end
+    end.
+
+	        
+get_files(Dir) -> 
+    {ok,Files} = file:list_dir(Dir),
+    add_slash(Dir,lists:sort(Files)).
+ 
+add_slash(_,[]) -> [];
+add_slash(Dir,[H|T]) ->
+    case file:read_file_info(lists:append(Dir,[$/|H])) of
+	{ok,FI} when FI#file_info.type==directory ->
+            [lists:append(H,"/")|add_slash(Dir,T)];
+        _ ->
+	    [H|add_slash(Dir,T)]
+    end.
+
+
+%filter([H|T]) ->
+%    case lists:last(H) of
+%	$/ -> [H|filter(T)];
+%	_ ->
+%	    Len =length(H),
+%	    if Len>4 ->
+%		    case lists:nthtail(Len-4,H) of
+%			".erl" -> [H|filter(T)];
+%			_ -> filter(T)
+%		    end;
+%		true -> filter(T)
+%	    end
+%    end;
+%filter([]) ->    
+%    [].
+	
+    
+%% like member but also returns index
+index_member(Item,List) ->
+    i_m(0,Item,List).
+
+i_m(N,Item,[Item|_List]) ->
+    {ok,N};
+i_m(N,Item,[_|List]) ->
+    i_m(N+1,Item,List);
+i_m(_N,_Item,[]) ->
+    false.
+
+up_one_dir(Dir) ->
+    L =string:tokens(Dir,[$/,$\\]),
+    lists:flatten(rem_last(L)).
+
+rem_last([_Last]) ->
+    [$/];
+rem_last([Head|Tail]) ->
+    [$/,Head|rem_last(Tail)];
+rem_last([]) ->
+    [$/].
+		  
+%% ----------------------------------------
+%% done