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|
unit UnitMainForm;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
const
ARRAY_DEFAULT_SIZE = 5;
type
{Exception lancée lorsque l'on cherche à assigner des valeurs négatives aux
coordonnées d'un point}
TNegativeIntException=class(Exception)
public
constructor Create(); overload;
constructor Create(Msg:String); overload;
constructor Create(Value:Integer); overload;
constructor Create(Msg:String; Value:Integer); overload;
end;
{Classe représentant un point}
TPoint = class
private
fx, fy:Integer;
procedure setX(x:Integer);
procedure setY(y:Integer);
public
constructor Create(); overload;
constructor Create(x:Integer); overload;
constructor Create(x,y:Integer); overload;
property x:Integer read fx write setX default 0;
property y:Integer read fy write setY default 0;
function AsString():String; virtual;
destructor Destroy(); override;
end;
{Classe de la fiche principale}
TMainForm = class(TForm)
private
Points:array of TPoint;
procedure InitArray(MaxVal:Integer); overload;
procedure InitArray(MaxVal, Size:Integer); overload;
procedure ClearArray();
procedure Refresh();
public
LabelPoints: TLabel;
LabelUsableIndex: TLabel;
LabelRange: TLabel;
ButtonInitArray: TButton;
ButtonClearArray: TButton;
ButtonRefreshForm: TButton;
EditChoosePoint: TEdit;
LabelChoosePoint: TLabel;
ButtonModifyPoint: TButton;
ButtonInsert: TButton;
constructor Create(AOwner:TComponent); override;
procedure ButtonInitArrayClick(Sender: TObject);
procedure ButtonRefreshFormClick(Sender: TObject);
procedure ButtonClearArrayClick(Sender: TObject);
end;
var
MainForm: TMainForm;
implementation
{$R *.dfm}
{Implémentation de la classe TNegativeIntException}
constructor TNegativeIntException.Create(); begin
inherited Create('Vous avez introduit une valeur négative !');
end;
constructor TNegativeIntException.Create(Msg:String); begin
inherited Create(Msg);
end;
constructor TNegativeIntException.Create(Value:Integer); begin
inherited Create('Vous avez introduit une valeur négative ('+
IntToStr(Value)+') !');
end;
constructor TNegativeIntException.Create(Msg:String; Value:Integer); begin
inherited Create(Msg+sLineBreak+'Valeur incorrecte: '+IntToStr(Value));
end;
{Implémentation de la classe TPoint}
constructor TPoint.Create(); begin
inherited Create();
x := 0;
y := 0;
end;
constructor TPoint.Create(x:Integer); begin
inherited Create();
Self.x := x;
y := 0;
end;
constructor TPoint.Create(x,y:Integer); begin
inherited Create();
Self.x := x;
Self.y := y;
end;
procedure TPoint.setX(x:Integer); begin
if(x<0) then
raise TNegativeIntException.Create(x);
fx := x;
end;
procedure TPoint.setY(y:Integer); begin
if(y<0) then
raise TNegativeIntException.Create(y);
fy := y;
end;
function TPoint.AsString():String; begin
Result := 'TPoint: x='+IntToStr(x)+', y='+IntToStr(y);
end;
destructor TPoint.Destroy(); begin
ShowMessage('TPoint.Destroy()');
inherited; {TObject.Destroy();}
end;
{Implémentation de la classe TMainForm}
constructor TMainForm.Create(AOwner:TComponent); begin
inherited; // invoque TForm.Create(AOwner);
ShowMessage('constructor TMainForm.Create(AOwner:TComponent)'); // <<=== ICI === //
InitArray(10);
Refresh();
end;
procedure TMainForm.InitArray(MaxVal:Integer); begin
Self.InitArray(MaxVal, ARRAY_DEFAULT_SIZE);
end;
procedure TMainForm.InitArray(MaxVal, Size:Integer);
var
i:Integer;
begin
{Contrôle paramètres}
if(MaxVal<=1)then
raise TNegativeIntException.Create(MaxVal);
if(Size<=0)then
raise TNegativeIntException.Create(Size);
SetLength(Points, Size);
for i := Low(Points) to High(Points) do
Points[i] := TPoint.Create(random(MaxVal), random(MaxVal));
ShowMessage('Array inited: '+IntToStr(Size)+' new points between 0 and '
+IntToStr(MaxVal)+' created !');
end;
procedure TMainForm.ClearArray(); begin
Finalize(Points);
ShowMessage('Points cleared !');
end;
procedure TMainForm.Refresh();
var
i:Integer;
s:String;
begin
if Low(Points) > High(Points) then
s := '(aucun point)'
else
s := '('+IntToStr(Low(Points))+' - '+IntToStr(High(Points))+')';
LabelRange.Caption := s;
s := '';
for i := Low(Points) to High(Points) do
s := s + sLineBreak + IntToStr(i)+ '>> ' + Points[i].AsString();
LabelPoints.Caption := s;
ShowMessage('Form Refreshed !');
end;
procedure TMainForm.ButtonInitArrayClick(Sender: TObject); begin
InitArray(100);
end;
procedure TMainForm.ButtonRefreshFormClick(Sender: TObject); begin
Refresh();
end;
procedure TMainForm.ButtonClearArrayClick(Sender: TObject); begin
ClearArray();
end;
end. |
Exception: EClassNotFound class TLabel
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Envoyé par bjl
: 
euh.........
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