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-module(ex16).
-copyright('Copyright (c) 1991-97 Ericsson Telecom AB').
-vsn('$Revision: /main/release/3 $ ').
-export([start/0,init/0]).
start() -> spawn(ex16, init, []).
init() ->
I=gs:start(),
Win=gs:create(window, I,
[{width, 200},{height, 200},
{title,"Default Demo"},{map, true}]),
gs:create(canvas, can1,Win,
[{x,0},{y, 0},{width,200},{height,200},
{default,text,{font,{courier,bold,19}}},
{default,text,{fg,blue}},
{default,rectangle,{fill,red}},{default,text,{text,"Pow!"}},
{default,oval,{fill,green}}]),
{A,B,C} = erlang:now(),
random:seed(A,B,C),
loop().
loop() ->
receive
{gs,_Id,destroy,_Data,_Arg} -> bye
after 500 ->
XY = {random:uniform(200),random:uniform(200)},
draw(random:uniform(3),XY),
loop()
end.
draw(1,XY) ->
gs:create(text,can1,[{coords,[XY]}]);
draw(2,XY) ->
XY2 = {random:uniform(200),random:uniform(200)},
gs:create(rectangle,can1,[{coords,[XY,XY2]}]);
draw(3,XY) ->
XY2 = {random:uniform(200),random:uniform(200)},
gs:create(oval,can1,[{coords,[XY,XY2]}]).
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