%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions 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 -----
