From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,d90e14e0a574d567
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!news4.google.com!news.glorb.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail
NNTP-Posting-Date: Tue, 19 Apr 2005 16:29:52 -0500
From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: graphical output with claw
References: <e499e546.0504191145.248c9348@posting.google.com>
X-Newsreader: Tom's custom newsreader
Message-ID: <XtOdnf9d9erM5fjfRVn-rg@comcast.com>
Date: Tue, 19 Apr 2005 16:29:53 -0500
NNTP-Posting-Host: 67.161.24.234
X-Trace: 
 sv3-fcH+X2PD1EL9I4HBruYM72Wi0O6qVc+XJQ9aRwIkHTw7jkxI2iA6K6J1d4PdXJqnFT/KfhiXOOfjNqa!mk5jXGoag3Nw/ZKPVc5P80TehTUT/FxQg1VTx8gPJ8UEg18uY6bpYCTnH+vL7g==
X-Complaints-To: abuse@comcast.net
X-DMCA-Complaints-To: dmca@comcast.net
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint
 properly
X-Postfilter: 1.3.32
Xref: g2news1.google.com comp.lang.ada:10583
Date: 2005-04-19T16:29:53-05:00
List-Id: <comp.lang.ada>

>Can somebody show me an example program with claw that draws just one
>pixel in a defined color into a window?
   How about 50 pixels (a single pixel is hard to see)
with Claw,
     Claw.Basic_Window,
     Claw.Canvas;
package Pixels is
  type Window_Type is new Claw.Basic_Window.Basic_Window_Type with private;
  -- an open window of this type shows a cloud of random red dots

  procedure Open(Window   : in out Window_Type;
                 Title    : in String);

private
  type Window_Type is new Claw.Basic_Window.Basic_Window_Type with record
    Is_Active : Boolean := False;
  end record;

  procedure When_Draw(Window           : in out Window_Type;
                      Easel            : in out Claw.Canvas.Basic_Canvas_Type'Class;
                      Erase_Background : in     Boolean;
                      Area             : in     Claw.Rectangle_Type);
end Pixels;
-----------------
with Ada.Numerics.Float_Random,
     Claw.Bitmaps;
package body Pixels is

  Gen : Ada.Numerics.Float_Random.Generator;

  procedure Open(Window   : in out Window_Type;
                 Title    : in String) is
  begin
    Create(Window, Title);
    Show(Window, Claw.Codes.Show_Startup);
    Window.Is_Active := True;
    Update(Window);
  end Open;

  procedure When_Draw(Window           : in out Window_Type;
                      Easel            : in out Claw.Canvas.Basic_Canvas_Type'Class;
                      Erase_Background : in     Boolean;
                      Area             : in     Claw.Rectangle_Type) is
    use Ada.Numerics.Float_Random;
  begin
    if Window.Is_Active then
      for i in 1 .. 50 loop
        Claw.Bitmaps.Set_Pixel(Easel,
                               (X=>Claw.Int(10.0+40.0*Random(Gen)),
                                Y=>Claw.Int(10.0+20.0*Random(Gen))),
                               Claw.Colors.RGB(Red=>255,Blue=>0,Green=>0));
      end loop;
    end if;
  end When_Draw;

end Pixels;
-----------------
with Claw,
     Pixels;
procedure Showdots is
  A_Window : Pixels.Window_Type;
begin
  Pixels.Open(A_Window,"Simple Example");
  delay 10.0;
end Showdots;