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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, ExtDlgs, Menus;
type
TForm1 = class(TForm)
PaintBox1: TPaintBox;
MainMenu1: TMainMenu;
Ouvrir1: TMenuItem;
Image1: TImage;
OpenPictureDialog1: TOpenPictureDialog;
ScrollBox1: TScrollBox;
procedure PaintBox1Paint(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure FormMouseWheelDown(Sender: TObject; Shift: TShiftState;
MousePos: TPoint; var Handled: Boolean);
procedure FormMouseWheelUp(Sender: TObject; Shift: TShiftState;
MousePos: TPoint; var Handled: Boolean);
procedure Ouvrir1Click(Sender: TObject);
private
{ Déclarations privées }
bmp : TBitmap;
public
{ Déclarations publiques }
end;
var
Form1: TForm1;
const inc : integer = 10; //incrément de zoom
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
bmp:=TBitmap.Create;
With bmp do
begin
Width:=Paintbox1.ClientWidth;
Height:=Paintbox1.ClientHeight;
end;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
bmp.Free;
end;
procedure TForm1.PaintBox1Paint(Sender: TObject);
begin
bmp.Width:=Paintbox1.ClientWidth;
bmp.Height:=Paintbox1.ClientHeight;
With bmp.Canvas do
begin
Brush.Color:=clWhite;
Fillrect(Paintbox1.ClientRect);
StretchDraw(PaintBox1.ClientRect,Image1.Picture.Bitmap);
end;
Paintbox1.Canvas.Draw(0,0,bmp);
end;
procedure TForm1.Ouvrir1Click(Sender: TObject); //ouvrir une image
begin
if OpenPictureDialog1.Execute then
begin
Image1.Picture.Bitmap.LoadFromFile(OpenPictureDialog1.FileName); //possible que pour une image d'extension .bmp
Paintbox1.Width:=Image1.Picture.Width;
Paintbox1.Height:=Image1.Picture.Height;
Paintbox1.OnPaint(nil);
end;
end;
procedure TForm1.FormMouseWheelDown(Sender: TObject; Shift: TShiftState;
MousePos: TPoint; var Handled: Boolean);
begin
Paintbox1.Width:=Paintbox1.Width-inc;
Paintbox1.Height:=Paintbox1.Height-inc;
Paintbox1.OnPaint(nil);
end;
procedure TForm1.FormMouseWheelUp(Sender: TObject; Shift: TShiftState;
MousePos: TPoint; var Handled: Boolean);
begin
Paintbox1.Width:=Paintbox1.Width+inc;
Paintbox1.Height:=Paintbox1.Height+inc;
Paintbox1.OnPaint(nil);
end;
end. |
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