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6 kaklik 1 
unit Unit1;
2 
 
3 
interface
4 
 
5 
uses
6 
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
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  Dialogs, StdCtrls, ExtCtrls, OleCtrls, VCFI, Menus;
8 
 
9 
type
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  TForm1 = class(TForm)
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    vykreslit: TButton;
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    Button2: TButton;
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    reset: TButton;
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    vypis: TButton;
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    Obrazovka: TPaintBox;
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    Posuv: TScrollBar;
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    ScrollBar2: TScrollBar;
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    ScrollBar3: TScrollBar;
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    zoom: TScrollBar;
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    StaticText1: TStaticText;
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    procedure vykreslitClick(Sender: TObject);
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23 
    procedure obrazovkaShow(Sender: TObject);
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    procedure Button2Click(Sender: TObject);
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    procedure resetClick(Sender: TObject);
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    procedure vypisClick(Sender: TObject);
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    procedure ScrollBar2Change(Sender: TObject);
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    procedure ScrollBar3Change(Sender: TObject);
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    procedure zoomChange(Sender: TObject);
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    procedure PosuvChange(Sender: TObject);
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    procedure Button1Click(Sender: TObject);
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   private
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    { Private declarations }
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  public
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procedure smazat;
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    { Public declarations }
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  end;
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const
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  MAX=455;
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  pametMAX=6*MAX;
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var
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  Form1: TForm1;
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  PobrazovkaYMIN: array [0..MAX] of word;
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  PobrazovkaYMAX: array [0..MAX] of word;
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  pamet: array[0..pametMAX{,0..pametMAX}]of word;
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49 
implementation
50 
 
51 
uses Unit2;
52 
 
53 
{$R *.dfm}
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55 
procedure Tform1.smazat;
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begin
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  Form1.Canvas.Pen.Mode:=pmNot;
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  Form1.Obrazovka.Canvas.Brush.Color:=clblack;
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  Form1.Obrazovka.Canvas.Rectangle(0,0,455,256);
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  Form1.Obrazovka.Canvas.Pen.Color:=cllime;
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end;
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procedure Draw;
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var
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 x: word;
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begin
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  Form1.Obrazovka.Canvas.MoveTo(0,PobrazovkaYMAX[0]);
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  for x:=1 to MAX do
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  begin
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    Form1.Obrazovka.Canvas.LineTo(x,PobrazovkaYMAX[x]);
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    Form1.Obrazovka.Canvas.LineTo(x,PobrazovkaYMIN[x]);
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  end
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end;
76 
 
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procedure TForm1.vykreslitClick(Sender: TObject);
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  (*  ble:extended;*)
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var i,x: integer;
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begin
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  smazat;
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  for x:=0 to pametMAX do
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   begin
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     pamet[x]:=random(200); //round((sin(x/1)*100)+100);
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   end;
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  PosuvChange(Self);
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end;
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90 
 
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procedure TForm1.obrazovkaShow(Sender: TObject);
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begin
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  smazat;
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end;
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procedure TForm1.Button2Click(Sender: TObject);
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var n: integer;
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begin
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  n:=0;
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  while n<256 do
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  begin
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    Obrazovka.Canvas.Pen.Color:=clYellow;
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    Obrazovka.Canvas.MoveTo(0,n);
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    Obrazovka.Canvas.LineTo(455,n);
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    n:=n+70;
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  end;
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  n:=0;
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  while n<455 do
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  begin
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    Obrazovka.Canvas.Pen.Color:=clSilver;
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    Obrazovka.Canvas.MoveTo(n,0);
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    Obrazovka.Canvas.LineTo(n,455);
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    n:=n+70;
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  end;
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  Obrazovka.Canvas.Pen.Color:=cllime
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end;
117 
 
118 
procedure TForm1.resetClick(Sender: TObject);
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var j:word;
120 
begin
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  smazat;
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  for j:=0 to MAX do
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  PobrazovkaYMIN[j]:=0;
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  PobrazovkaYMAX[j]:=0;
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  for j:=0 to pametMAX do
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  pamet[j]:=0;
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end;
128 
 
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procedure TForm1.vypisClick(Sender: TObject);
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var faut:TextFile;
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    x:word;
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    ble: string;
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begin
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  Form2.ShowModal;
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  if Form2.Edit1.Text<>'' then
136 
  begin
137 
    AssignFile(faut,Form2.Edit1.Text);
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    Rewrite(faut);
139 
 
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    for x:=0 to 455 do
141 
    begin
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      str(x,ble);
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      Write(faut,'x='+ble+',');
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      str(PobrazovkaYMIN[x],ble);
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      Write(faut,'Ymin='+ble+',');
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      str(PobrazovkaYMAX[x],ble);
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      Writeln(faut,'Ymax='+ble+'; ');
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    end;
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    CloseFile(faut);
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  end
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end;
152 
 
153 
 
154 
procedure TForm1.ScrollBar2Change(Sender: TObject);
155 
 var
156 
   xold:word;
157 
   zoom: integer;
158 
   code: integer;
159 
begin
160 
  xold:=ScrollBar2.Position;
161 
 
162 
  Obrazovka.Canvas.Pen.Color:=clred;
163 
  Obrazovka.Canvas.Pen.Mode:=pmNotXor;
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  Form1.Obrazovka.Canvas.MoveTo(xold,Obrazovka.Height);
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  Form1.Obrazovka.Canvas.LineTo(xold,0);
166 
  Obrazovka.Canvas.Pen.Mode:=pmNot;
167 
end;
168 
 
169 
procedure TForm1.ScrollBar3Change(Sender: TObject);
170 
var
171 
  x,y:word;
172 
begin
173 
  obrazovka.Canvas.Pen.Color:=clred;
174 
  obrazovka.Canvas.Pen.Mode:=pmNotXor;
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  Form1.obrazovka.Canvas.MoveTo(0,ScrollBar3.Position);
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  Form1.obrazovka.Canvas.LineTo(obrazovka.Width,ScrollBar3.Position);
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  obrazovka.Canvas.Pen.Mode:=pmNop;
178 
end;
179 
 
180 
procedure TForm1.zoomChange(Sender: TObject);
181 
var
182 
  zoom, Xpamet, Xobraz, i, Ymax, Ymin : word;
183 
begin
184 
  zoom:=Form1.zoom.Position;
185 
  Xpamet:=Posuv.Position;
186 
 
187 
  Xobraz:=0;
188 
  while Xpamet < pametMAX do
189 
  begin
190 
    Ymax:=pamet[Xpamet];
191 
    Ymin:=pamet[Xpamet];
192 
    for i:=Xpamet to Xpamet+(zoom-1) do
193 
      begin
194 
        if pamet[Xpamet]<Ymin then Ymin:=pamet[Xpamet]
195 
          else if pamet[Xpamet]>Ymax then Ymax:=pamet[Xpamet]
196 
      end;
197 
  end;
198 
  smazat;
199 
  Draw;
200 
end;
201 
 
202 
procedure TForm1.PosuvChange(Sender: TObject);
203 
begin
204 
  Posuv.Max:=pametMAX-MAX;
205 
  zoomChange(Self);
206 
end;
207 
 
208 
procedure TForm1.Button1Click(Sender: TObject);
209 
begin
210 
 smazat;
211 
end;
212 
 
213 
end.