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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2009. 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%
%%
-module(pman_tool).
%% Listbox selection window
-export([select/3]).
-record(state, {topwin,
frame,
listbox}).
%% Constants
-define(WIN_WIDTH, 350).
-define(WIN_HEIGHT, 350).
select(Win, Title, Choices) ->
Self = self(),
Pid = spawn_link(fun() -> init(Self, Win, Title, Choices) end),
receive
{Pid, Result} ->
Result
end.
init(Pid, Win, Title, Choices) ->
%% Create window
State = create_window(Win, Title, Choices),
gse:map(State#state.topwin),
%% enter event loop
loop(Pid, Choices, State).
loop(Pid, Choices, State) ->
receive
{gs, _, destroy, _Data, _Args} ->
Pid ! {self(), cancelled};
{gs, _, configure, _Data, [W, H|_]} ->
gse:resize(State#state.frame, W, H),
loop(Pid, Choices, State);
{gs, _, click, ok, _Args} ->
case gs:read(State#state.listbox, selection) of
[] ->
Pid ! {self(), cancelled};
Indices ->
Selection = selection(Indices, Choices),
Pid ! {self(), Selection}
end;
{gs, _, click, cancel, _Args} ->
Pid ! {self(), cancelled};
{gs, Obj, doubleclick, _Data, _Args} ->
self() ! {gs, Obj, click, ok, []},
loop(Pid, Choices, State);
_GSEvent ->
loop(Pid, Choices, State)
end.
selection(Indices, Choices) ->
selection(0, Indices, Choices).
selection(I, [I|Is], [{Val,_Str}|Vals]) ->
[Val | selection(I+1, Is, Vals)];
selection(I, [I|Is], [Val|Vals]) ->
[Val | selection(I+1, Is, Vals)];
selection(_I, [], _Vals) ->
[];
selection(I, Is, [_Val|Vals]) ->
selection(I+1, Is, Vals).
create_window(Win, Title, Choices) ->
Font = pman_win:font(Win),
%% Top window and a frame that covers it entirely, to allow
%% usage of the packer for geometry management.
Topwin = gse:window(Win, [{width, ?WIN_WIDTH},
{height,?WIN_HEIGHT},
{configure, true},
{title, Title}]),
Frame = gse:frame(Topwin, [{packer_x,[{stretch,1},
{stretch,1}]},
{packer_y,[{stretch,1},
{stretch,5},
{stretch,1}]}]),
%% Caption above the list of items
CaptionTxt = "Select one or more of the following:",
gse:label(Frame, [{pack_x,{1,2}},
{pack_y,{1,1}},
{label,{text,CaptionTxt}}, {font,Font}]),
%% List of selectable items
Listbox = gse:listbox(Frame, [{pack_x,{1,2}},
{pack_y,{2,2}},
{selectmode,multiple},
{doubleclick, true},
{font,Font},
{items, str_choices(Choices)}]),
%% OK and Cancel buttons in a separate frame.
F13 = gse:frame(Frame, [{bw,1},
{pack_xy,{{1,2},3}},
{packer_x,[{stretch,1},
{fixed, 60},
{stretch,1},
{fixed, 60},
{stretch,1}]},
{packer_y,[{stretch,1},
{fixed, 30},
{stretch,1}]}]),
gse:button(F13, [{pack_xy,{2,2}},
{label,{text,"OK"}}, {font,Font},
{data,ok}]),
gse:button(F13, [{pack_xy,{4,2}},
{label,{text,"Cancel"}}, {font,Font},
{data,cancel}]),
gse:resize(Frame, ?WIN_WIDTH, ?WIN_HEIGHT),
#state{topwin=Topwin, frame=Frame, listbox=Listbox}.
str_choices(Choices) ->
lists:map(
fun({Val, Str}) ->
lists:flatten(io_lib:format("~p: ~s", [Val, Str]));
(Term) ->
lists:flatten(io_lib:format("~p", [Term]))
end,
Choices).
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