График с проверкой попадпния, Делфи.Графика Опции

[Zundell]

Ребят помогите пожалуйста...никак не могу проверить на попадпние в заданную область...вот код...график начертил..на форме только image и lable1:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Image1: TImage;
    Label1: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure Image1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
with image1.Canvas do
  begin
    pen.Color := clBlack;
    brush.Color := clRed;

    moveTo(200,50);
    lineTo(200, 350);
    moveTo(50,200);
    LineTo(350, 200);

    moveTo(200,60);
    lineTo(340,200);
    lineTo(200,340);

    arc(60,60,340,340,200,50,201,350);

    floodFill(199,199, clBlack, fsBorder);
    floodFill(201,199, clBlack, fsBorder);
    floodFill(199,201, clBlack, fsBorder);
    floodFill(201,201, clBlack, fsBorder);
    textout(190,205,'0');
    textout(70,205,'-1');
    textout(307,205,'1');
    textout(190,65,'1');
    textout(190,315,'-1');
  end;
end;

procedure TForm1.Image1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  if (x<0) and (x*x+y*y<?)or (x>0) and ((x+y)<?) then
form1.Label1.Caption:='Принадлежит' else
form1.Label1.Caption:='Не принадлежит';
end;

end.

Никак не могу понять с чем нужно сравнивать...заранее спасибо.

[Zundell]

Все..программу написал,все работает...если кому пригодится,выкладываю:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls, TeEngine, Series, TeeProcs, Chart;

type
  TForm1 = class(TForm)
    Image1: TImage;
    Label1: TLabel;
    Button1: TButton;
    Button2: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Chart1: TChart;
    Series1: TLineSeries;
    Button3: TButton;
    PrintDialog1: TPrintDialog;
    Button4: TButton;
    Button5: TButton;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    Label10: TLabel;
    Label11: TLabel;
    Label12: TLabel;
    Label13: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure Image1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses Unit2;

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
with image1.Canvas do
  begin
    pen.Color := clBlack;
    brush.Color := clAqua;

    moveTo(200,50);
    lineTo(200, 350);
    moveTo(50,200);
    LineTo(350, 200);

    moveTo(200,60);
    lineTo(340,200);
    lineTo(200,340);

    arc(60,60,340,340,200,50,201,350);

    floodFill(199,199, clBlack, fsBorder);
    floodFill(201,199, clBlack, fsBorder);
    floodFill(199,201, clBlack, fsBorder);
    floodFill(201,201, clBlack, fsBorder);
    textout(190,205,'0');
    textout(70,205,'-1');
    textout(307,205,'1');
    textout(190,65,'1');
    textout(190,315,'-1');
  end;

end;

procedure TForm1.Image1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
   X := X - 200; Y := Y - 200;
  If (X < 0) and (sqr(X)+sqr(Y) < sqr(139)) or
     (X >= 0) and (140 - X - abs(Y) > 0) Then form1.Label1.Caption:= 'Принадлежит'
  else form1.Label1.Caption := 'Не принадлежит';
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  y,x:real;
begin
  try
    x:=strtofloat(Edit1.Text);
  y:=Arctan(x/sqrt(1-sqr(x)))+exp(2);
  Label4.Caption:='Y= '+floattostr(y);
  except
    on EConvertError do
    begin
      ShowMessage('Введите число!'+#13+'При записи дробного числа используйте запятую.');
      exit;
    end;
  end;
  if Label4.Caption<>'' then Button3.Enabled:=True;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
l,m:real;
begin
if (form1.Edit2.text<>'')and(form1.Edit3.text<>'') then
begin
 l:=strtofloat(form1.Edit2.text);
 m:=strtofloat(form1.Edit3.text);
end;
if (l<=0) and ((l*l+m*m)<=1) or (l>=0) and (abs(l+m)<=1) then
form1.Label1.Caption:='Принадлежит' else
form1.Label1.Caption:='Не принадлежит';
end;

procedure TForm1.Button3Click(Sender: TObject);
var
  i:integer;
begin
for i:=0 to 100 do
    Series1.AddXY(0.01*Pi*i,Arctan((0.01*Pi*i)/sqr(1-(0.01*Pi*i)*(0.01*Pi*i)))+(0.01*Pi*i)*(0.01*Pi*i));
end;


procedure TForm1.Button4Click(Sender: TObject);
begin
  Form2.Image1.Picture.Bitmap:=GetFormImage;
  Form2.Showmodal;
end;
procedure TForm1.Button5Click(Sender: TObject);
begin
  if PrintDialog1.Execute then Form1.Print;
end;

end.