再学GDI+[20]: TGPTextureBrush与TWrapMode

再学GDI+[20]: TGPTextureBrush与TWrapMode2012-04-29 cnblogs 万一

TGPTextureBrush.Create（
 image: TGPImage;          {用于画刷的图像}
 wrapMode: TWrapMode = WrapModeTile {平铺样式, 是可选值, 见下表}
）;

本例效果图:

代码文件:

unit Unit1;
interface
uses
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 Dialogs, StdCtrls;
type
 TForm1 = class（TForm）
  ComboBox1: TComboBox;
  procedure FormCreate（Sender: TObject）;
  procedure FormPaint（Sender: TObject）;
  procedure ComboBox1Change（Sender: TObject）;
 end;
var
 Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ, GDIPAPI, TypInfo;
procedure TForm1.FormCreate（Sender: TObject）;
var
 i: Integer;
begin
 for i := 0 to 4 do
  ComboBox1.Items.Add（GetEnumName（TypeInfo（TWrapMode）, i））;
 ComboBox1.ItemIndex := 0;
end;
procedure TForm1.FormPaint（Sender: TObject）;
var
 g: TGPGraphics;
 r: TGPRect;
 img: TGPImage;
 tb: TGPTextureBrush;
begin
 g := TGPGraphics.Create（Canvas.Handle）;
 r := MakeRect（ClientRect）;
 img := TGPImage.Create（"c:	empcat.png"）;
 tb := TGPTextureBrush.Create（img）;
 tb.SetWrapMode（TWrapMode（ComboBox1.ItemIndex））;
 g.FillRectangle（tb, r）;
 img.Free;
 tb.Free;
 g.Free;
end;
procedure TForm1.ComboBox1Change（Sender: TObject）;
begin
 Repaint;
end;
end.