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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.AddRGB(64, 0, 0); DXPaintBox1.Repaint; end; procedure TForm1.Button3Click(Sender: TObject); begin DXPaintBox1.DIB.AddRGB(0, 64, 0); DXPaintBox1.Repaint; end; procedure TForm1.Button4Click(Sender: TObject); begin DXPaintBox1.DIB.AddRGB(0, 0, 64); DXPaintBox1.Repaint; end; end. 窗体文件: object Form1: TForm1 Left = 0 Top = 0 Caption = 'Form1' ClientHeight = 142 ClientWidth = 226 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object DXPaintBox1: TDXPaintBox Left = 8 Top = 8 Width = 81 Height = 73 AutoStretch = False Center = False KeepAspect = False Stretch = False ViewWidth = 0 ViewHeight = 0 end object Button1: TButton Left = 143 Top = 8 Width = 75 Height = 25 Caption = 'Button1' TabOrder = 0 OnClick = Button1Click end object Button2: TButton Left = 143 Top = 47 Width = 75 Height = 25 Caption = 'Button2' TabOrder = 1 OnClick = Button2Click end object Button3: TButton Left = 143 Top = 78 Width = 75 Height = 25 Caption = 'Button3' TabOrder = 2 OnClick = Button3Click end object Button4: TButton Left = 143 Top = 109 Width = 75 Height = 25 Caption = 'Button4' TabOrder = 3 OnClick = Button4Click end end |
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