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本例效果图: 代码文件: 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); begin DXPaintBox1.DIB.Greyscale(32); DXPaintBox1.Repaint; end; procedure TForm1.Button3Click(Sender: TObject); begin DXPaintBox1.DIB.Greyscale(4); DXPaintBox1.Repaint; end; procedure TForm1.Button4Click(Sender: TObject); begin DXPaintBox1.DIB.Greyscale(1); DXPaintBox1.Repaint; end; end. |
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