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+%%
+%% %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%
+%%
+
+%%
+%% ------------------------------------------------------------
+%% Basic Polygon Type
+%% ------------------------------------------------------------
+
+-module(gstk_polygon).
+
+
+%%-----------------------------------------------------------------------------
+%% POLYGON OPTIONS
+%%
+%% Attributes:
+%% bw Int
+%% coords [{X1,Y1}, {X2,Y2} | {Xn,Yn}]
+%% data Data
+%% fg Color
+%% fill Color
+%% smooth Bool
+%% splinesteps Int
+%% stipple Bool
+%%
+%% Commands:
+%% lower
+%% move {Dx, Dy}
+%% raise
+%% scale {Xo, Yo, Sx, Sy}
+%% setfocus Bool
+%%
+%% Events:
+%% buttonpress [Bool | {Bool, Data}]
+%% buttonrelease [Bool | {Bool, Data}]
+%% enter [Bool | {Bool, Data}]
+%% keypress [Bool | {Bool, Data}]
+%% keyrelease [Bool | {Bool, Data}]
+%% leave [Bool | {Bool, Data}]
+%% motion [Bool | {Bool, Data}]
+%%
+%% Read Options:
+%% children
+%% id
+%% parent
+%% type
+%%
+
+-export([create/3, config/3, read/3, delete/2, destroy/3, event/5,
+ option/5,read_option/5]).
+
+-include("gstk.hrl").
+
+%%-----------------------------------------------------------------------------
+%% MANDATORY INTERFACE FUNCTIONS
+%%-----------------------------------------------------------------------------
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Function : create/7
+%% Purpose : Create a widget of the type defined in this module.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+create(DB, Gstkid, Opts) ->
+ case pickout_coords(Opts, []) of
+ {error, Error} ->
+ {bad_result, Error};
+ {Coords, NewOpts} ->
+ Ngstkid=gstk_canvas:upd_gstkid(DB, Gstkid, Opts),
+ #gstkid{widget=CanvasTkW}=Ngstkid,
+ MCmd = [CanvasTkW, " create po ", Coords],
+ gstk_canvas:mk_cmd_and_call(NewOpts, Ngstkid,CanvasTkW, MCmd, DB)
+ end.
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Function : config/3
+%% Purpose : Configure a widget of the type defined in this module.
+%% Return : [true | {bad_result, Reason}]
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+config(DB, Gstkid, Opts) ->
+ gstk_canvas:item_config(DB, Gstkid, Opts).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Function : read/3
+%% Purpose : Read one option from a widget
+%% Args : DB - The Database
+%% Gstkid - The gstkid of the widget
+%% Opt - An option to read
+%%
+%% Return : [OptionValue | {bad_result, Reason}]
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+read(DB, Gstkid, Opt) ->
+ Item = Gstkid#gstkid.widget_data,
+ gstk_generic:read_option(DB,Gstkid,Opt,[gstk:to_ascii(Item)]).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Function : delete/2
+%% Purpose : Delete widget from databas and return tkwidget to destroy
+%% Args : DB - The Database
+%% Gstkid - The gstkid of the widget
+%%
+%% Return : TkWidget to destroy | {Parent, Objmod, Args}.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+delete(DB, Gstkid) ->
+ gstk_canvas:item_delete_impl(DB,Gstkid).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Function : destroy/3
+%% Purpose : Destroy a widget
+%% Args : DB - The Database
+%% Canvas - The canvas tk widget
+%% Item - The item number to destroy
+%%
+%% Return : [true | {bad_result, Reason}]
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+destroy(_DB, Canvas, Item) ->
+ gstk:exec([Canvas, " delete ", gstk:to_ascii(Item)]).
+
+
+event(DB, Gstkid, Etype, Edata, Args) ->
+ gstk_generic:event(DB, Gstkid, Etype, Edata, Args).
+
+%%-----------------------------------------------------------------------------
+%% MANDATORY FUNCTIONS
+%%-----------------------------------------------------------------------------
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Function : option/5
+%% Purpose : Take care of options
+%% Args : Option - An option tuple
+%% Gstkid - The gstkid of the widget
+%% MainW - The main tk-widget
+%% Canvas - The canvas tk-widget
+%% DB - The Database
+%%
+%% Return : A tuple {OptionType, OptionCmd}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+option(Option, _Gstkid, _Canvas, _DB, _AItem) ->
+ case Option of
+ {fg, Color} -> {s, [" -outline ", gstk:to_color(Color)]};
+ {bw, Int} -> {s, [" -w ", gstk:to_ascii(Int)]};
+ {smooth, Bool} -> {s, [" -sm ", gstk:to_ascii(Bool)]};
+ {splinesteps, Int} -> {s, [" -sp ", gstk:to_ascii(Int)]};
+ _ -> invalid_option
+ end.
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Function : read_option/5
+%% Purpose : Take care of a read option
+%% Return : The value of the option or invalid_option
+%% [OptionValue | {bad_result, Reason}]
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+read_option(Option, Gstkid, Canvas, _DB, AItem) ->
+ case Option of
+ bw -> tcl2erl:ret_int([Canvas, " itemcg ", AItem, " -w"]);
+ fg ->
+ tcl2erl:ret_color([Canvas, " itemcg ", AItem, " -outline"]);
+ smooth -> tcl2erl:ret_bool([Canvas, " itemcg ", AItem, " -sm"]);
+ splinesteps -> tcl2erl:ret_int([Canvas, " itemcg ", AItem, " -sp"]);
+ stipple ->
+ tcl2erl:ret_stipple([Canvas," itemcg ",AItem," -stipple"]);
+
+ _ -> {bad_result, {Gstkid#gstkid.objtype, invalid_option, Option}}
+ end.
+
+%%-----------------------------------------------------------------------------
+%% PRIMITIVES
+%%-----------------------------------------------------------------------------
+
+pickout_coords([{coords,Coords} | Rest], Opts) when length(Coords) >= 2 ->
+ case gstk_canvas:coords(Coords) of
+ invalid ->
+ {error, "A polygon must have at least four coordinates"};
+ RealCoords ->
+ {RealCoords, lists:append(Rest, Opts)}
+ end;
+pickout_coords([Opt | Rest], Opts) ->
+ pickout_coords(Rest, [Opt|Opts]);
+pickout_coords([], _Opts) ->
+ {error, "A polygon must have at least four coordinates"}.
+%% ----- Done -----
+