本例效果圖:
代碼文件:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DIB, StdCtrls;
type
TForm1 = class(TForm)
DXPaintBox1: TDXPaintBox;
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
const
ImgPath1 = 'C:\Temp\DX.jpg';
begin
DXPaintBox1.DIB.LoadFromFile(ImgPath1);
DXPaintBox1.Width := DXPaintBox1.DIB.Width;
DXPaintBox1.Height := DXPaintBox1.DIB.Height;
DXPaintBox1.Repaint;
end;
procedure TForm1.Button2Click(Sender: TObject);
var
w,h: Integer;
begin
w := DXPaintBox1.Width div 2;
h := DXPaintBox1.Height div 2;
DXPaintBox1.DIB.DoResample(w, h, TFilterTypeResample(0));
DXPaintBox1.Repaint;
end;
procedure TForm1.Button3Click(Sender: TObject);
var
w,h: Integer;
begin
w := DXPaintBox1.Width div 2;
h := DXPaintBox1.Height;
DXPaintBox1.DIB.DoResample(w, h, TFilterTypeResample(0));
DXPaintBox1.Repaint;
end;
procedure TForm1.Button4Click(Sender: TObject);
var
w,h: Integer;
begin
w := Trunc(DXPaintBox1.Width * 1.4);
h := Trunc(DXPaintBox1.Height * 1.4);
DXPaintBox1.DIB.DoResample(w, h, TFilterTypeResample(0));
DXPaintBox1.Repaint;
end;
end.
