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| type
TForm1 = class(TForm)
PaintBox1: TPaintBox;
procedure PaintBox1Paint(Sender: TObject);
procedure PaintBox1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
procedure FormCreate(Sender: TObject);
private
FBitmap: TBitmap;
FOffset: TPoint;
FLastPointSet: TPoint;// point a partir duquel calculer le mouvement de souris
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.PaintBox1Paint(Sender: TObject);
begin
//ici, eventuellement, une restriction du XY pour que l'image ne soit pas completement en dehors de l'ecran
PaintBox1.Canvas.Draw(FOffset.X, FOffset.Y, FBitmap);
end;
procedure TForm1.PaintBox1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
if ssLeft in Shift then
FLastPointSet := Point(X, Y);
end;
procedure TForm1.PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
begin
if ssLeft in Shift then
begin
FOffset.X := FOffset.X + X - FLastPointSet.X;
FOffset.Y := FOffset.Y + Y - FLastPointSet.Y;
FLastPointSet := Point(X, Y);
PaintBox1.Invalidate;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Self.DoubleBuffered := true;
FBitmap := TBitmap.Create;
FBitmap.LoadFromFile('C:\Users\Alex\Pictures\perceuse.png.alpha.bmp');
end; |
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