1 files changed, 104 insertions, 0 deletions
diff --git a/lib/gs/examples/rubber.erl b/lib/gs/examples/rubber.erl
new file mode 100644
index 0000000000..ba263f07ac
--- /dev/null
+++ b/lib/gs/examples/rubber.erl
@@ -0,0 +1,104 @@
+%%
+%% %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%
+%%
+
+%%
+%% ------------------------------------------------------------
+%% A rubberbanding example in Erlang
+%% ------------------------------------------------------------
+
+-module(rubber).
+
+-export([start/0, init/0]).
+
+start() ->
+    spawn(rubber,init,[]).
+
+init() ->
+    I=gs:start(),
+    Win = gs:window(I,[{title,"Rubberbanding in Erlang"},
+		      {width,300},{height,200}]),
+    C= gs:canvas(Win,[{width,300},{height,200},{bg,green}]),
+    gs:radiobutton(Win,[{width,100},{label,{text,"Oval"}},{align,w},
+			{data,oval},{y,0},{select,true}]),
+    gs:radiobutton(Win,[{width,100},{label,{text,"Rectangle"}},{align,w},
+			{data,rectangle},{y,30}]),
+    gs:radiobutton(Win,[{width,100},{label,{text,"Line"}},{align,w},
+			{data,line},{y,60}]),
+    gs:button(Win,[{label,{text,"Quit"}},{data,quit},{y,90}]),
+    gs:config(Win,[{motion,true},{buttonpress,true},{buttonrelease,true}]),
+    gs:config(Win,{map,true}),
+    loop(C,nil,oval,0,0).
+
+
+loop(Win,Obj,Objtype,X1,Y1) ->
+    receive
+	{gs,_,motion,_,[X2,Y2]} -> 
+	    flush(Win,Obj,Objtype,X1,Y1,X2,Y2);
+	{gs,_,buttonpress,_,[1,X2,Y2]} -> 
+	    down(Win,Obj,Objtype,X2,Y2);
+	{gs,_,buttonrelease,_,[1,X2,Y2]} -> 
+	    up(Win,Obj,Objtype,X1,Y1,X2,Y2);
+	{gs,_,click,quit,_} -> 
+	    exit(normal);
+	{gs,_,click,Newtype,_} -> 
+	    loop(Win,Obj,Newtype,X1,Y1);
+	{gs,_,destroy,_,_} -> 
+	    exit(normal);
+	Other -> 
+	    io:format("Other:~w~n",[Other]),
+	    loop(Win,Obj,Objtype,X1,Y1)
+    end.
+
+
+down(Win,nil,oval,X1,Y1) ->
+    Obj = gs:create(oval,Win,[{coords,[{X1,Y1},{X1+1,Y1+1}]},{fill,red}]),
+    loop(Win,Obj,oval,X1,Y1);
+down(Win,nil,line,X1,Y1) ->
+    Obj = gs:create(line,Win,[{coords,[{X1,Y1},{X1+1,Y1+1}]},{width,3},{fg,black}]),
+    loop(Win,Obj,line,X1,Y1);
+down(Win,nil,Objtype,X1,Y1) ->
+    Obj = gs:create(Objtype,Win,[{coords,[{X1,Y1},{X1+1,Y1+1}]},{bw,2},{fg,blue}]),
+    loop(Win,Obj,Objtype,X1,Y1);
+down(Win,Obj,Objtype,X1,Y1) ->
+    gs:destroy(Obj),
+    down(Win,nil,Objtype,X1,Y1).
+
+up(Win,nil,Objtype,_X1,_Y1,X2,Y2) ->
+    loop(Win,nil,Objtype,X2,Y2);
+up(Win,Obj,Objtype,X1,Y1,X2,Y2) ->
+    gs:config(Obj,{coords,[{X1,Y1},{X2,Y2}]}),
+    loop(Win,nil,Objtype,X2,Y2).
+
+
+move(Win,nil,Objtype,X1,Y1,_X2,_Y2) ->
+    loop(Win,nil,Objtype,X1,Y1);
+move(Win,Obj,Objtype,X1,Y1,X2,Y2) ->
+    gs:config(Obj,{coords,[{X1,Y1},{X2,Y2}]}),
+    loop(Win,Obj,Objtype,X1,Y1).
+
+
+flush(Win,Obj,Objtype,X1,Y1,X2,Y2) ->
+    receive
+        {gs,_,motion,_,[XX2,YY2]} -> 
+            flush(Win,Obj,Objtype,X1,Y1,XX2,YY2)
+    after
+        0 -> move(Win,Obj,Objtype,X1,Y1,X2,Y2)
+    end.
+
+%% ------------------------------------------------------------