урок на делфи 20 - след от курсора


задание на delphi. Оставить след от курсора на форме


unit Unit1;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls;
type
TForm1 = class(TForm)
procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
chet:integer;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
chet:=0;
end;
procedure TForm1.FormMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
Canvas.MoveTo(X+10, Y);
Canvas.LineTo(x+10,y+15);
Canvas.MoveTo(X+10, Y+15);
Canvas.LineTo(x+15,y+12);
Canvas.MoveTo(X+15, Y+12);
Canvas.LineTo(x+20,y+17);
Canvas.MoveTo(X+20, Y+16);
Canvas.LineTo(x+25,y+16);
Canvas.MoveTo(X+25, Y+16);
Canvas.LineTo(x+20,y+9);
Canvas.MoveTo(X+20, Y+9);
Canvas.LineTo(x+26,y+8);
Canvas.MoveTo(X+26, Y+8);
Canvas.LineTo(x+10,y);
chet:=chet+1;
if chet=100 then
begin
InvalidateRect(Form1.Handle,nil,true);
chet:=0;
end;
end;
end.



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