Dibujarr elipse

[ConejitaKatrina]

Hola a todos, necesito ayuda en esto, quiero terminar este simple programa en delphi que su autor empezo y dejo a medias. Quiero que se pueda crear una elipse al igual que se hizo con el rectangulo. Se que puede ser una tonteria pero solo quiero terminarlo para ver como seria.

Por favor no me juzguen, no me gusta la programacion, solo trato de entenderla.

Código Delphi [-]
unit main;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Menus, Buttons, ExtCtrls, StdCtrls;

type
  TMainForm = class(TForm)
    MainMenu1: TMainMenu;
    FileMenu: TMenuItem;
    Exit1: TMenuItem;
    Panel1: TPanel;
    Pencil: TSpeedButton;
    Image1: TImage;
    SaveAs1: TMenuItem;
    SaveDialog1: TSaveDialog;
    Open1: TMenuItem;
    OpenDialog1: TOpenDialog;
    ColorDialog1: TColorDialog;
    ColorBtn: TBitBtn;
    Boxtool: TSpeedButton;
    procedure Exit1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Image1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure Image1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure SaveAs1Click(Sender: TObject);
    procedure Open1Click(Sender: TObject);
    procedure ColorBtnClick(Sender: TObject);
    procedure Capture(x1,y1,x,y: integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  MainForm: TMainForm;
  drawing: Boolean;
  filename: string;
  x1,y1,x2,y2,toolinUse: integer;
  holdingArea: Tbitmap;
  holdingSomething : Boolean;
  r1,r2: Trect;
implementation

{$R *.dfm}

procedure TMainForm.ColorBtnClick(Sender: TObject);
begin
  ColorDialog1.Execute;
  Image1.Canvas.Pen.Color:= ColorDialog1.Color;
end;

procedure TMainForm.Exit1Click(Sender: TObject);
begin
  MainForm.Close;
end;

procedure TMainForm.FormCreate(Sender: TObject);
begin
  //drawing:= False;
  holdingSomething := false;
end;

procedure TMainForm.Image1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Image1.Canvas.MoveTo(x,y);
  x1:= x;
  y1:= y;
  toolinUse:= 0;
  if Pencil.Down then
  toolinUse:=1;
  if boxtool.Down then
  begin
    toolinUse:=2;
    Image1.Canvas.Brush.Style:= bsclear;
  end;
end;

procedure TMainForm.Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  if toolinUse= 1 then
  with Image1.Canvas do lineto(x,y);
  if toolinUse= 2 then  //rectangle tool
  begin
    if holdingSomething then
    begin
      with Image1.Canvas do
        copyrect(r1,holdingArea.Canvas,r2);
        holdingArea.Free;
    end;
     capture(x1,y1,x,y);
     Image1.Canvas.Rectangle(x1,y1,x2,y2);
  end;

end;

procedure TMainForm.Image1MouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  if toolInUse = 2 then
  begin
    if holdingSomething then
      begin
        with image1.canvas do
          copyrect(R1,holdingArea.canvas,R2);
        holdingArea.free;  holdingsomething := false;
       end;
      Image1.canvas.rectangle(x1,y1,x2,y2);
  end;
toolInUse := 0;
end;

procedure TMainForm.Open1Click(Sender: TObject);
begin
  OpenDialog1.DefaultExt:='BMP';
  if OpenDialog1.Execute then
    begin
      OpenDialog1.Filter:='Bitmap(*.bmp)|*.BMP';
      Image1.Picture.LoadFromFile(filename);
    end;
end;

procedure TMainForm.SaveAs1Click(Sender: TObject);
begin
  SaveDialog1.DefaultExt:='BMP';
  if SaveDialog1.Execute then
     begin
       filename:= SaveDialog1.Filename;
        Image1.Picture.SaveToFile(filename)
     end;
end;

procedure TMainForm.Capture(x1,y1,x,y: integer);
begin
  x2 := x; y2 := y; {remember this spot}
  holdingArea := Tbitmap.create;
  holdingArea.width := abs(x2-x1) + 2;
  holdingArea.height := abs(y2-y1) + 2;

  With R1 do
   begin
    {find left & right sides of rectangle to capture}
    if x1 < x2 then begin left := x1; right := x2+1 end
               else begin left := x2; right := x1+1 end;
    {find top & bottom of rectangle to capture}
    if y1 < y2 then begin top:=y1-1; bottom := y2+1 end
             else begin top := y2-1; bottom := y1+1 end;
   end;
  With R2 do
   begin
     left := 0; top := 0; right := R1.right-R1.left;
     bottom := R1.bottom-R1.top
   end;
  With holdingArea.canvas do
    copyrect(R2,Image1.canvas,R1);
  holdingSomething := true;
end;
end.

No me dejan colocar enlaces pero la pagina del autor la pueden encontrar asi
Create your own Paint Program

[Casimiro Notevi]

Bienvenido a clubdelphi, ¿ya leiste nuestra guía de estilo?, gracias por tu colaboración

Recuerda poner los tags al código fuente, ejemplo:



Gracias

[Casimiro Notevi]

Por favor, no repitas hilos, gracias.

pd: he borrado el otro.