Delphi下的GDI+编程[7] 单色画刷-SolidBrush & 填充矩形-FillRectangle

本例效果图：

SolidBrush：定义单色画笔。画笔用于填充图形形状，如矩形、椭圆、扇形、多边形和封闭路径。

FillRectangle：填充由一对坐标、一个宽度和一个高度指定的矩形的内部

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  TForm1 = class(TForm)
    procedure FormPaint(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
uses GDIPAPI,GDIPOBJ;
procedure TForm1.FormPaint(Sender: TObject);
var
  g:TGPGraphics;
  p:TGPPen;
  hx:TGPSolidBrush;       {定义单色画刷类}
  rect:TGPRect;              {定义一个TGPRECT的结构}
begin
  g:=TGPGraphics.Create(Canvas.Handle);  {建立实例}
  p:=TGPPen.Create(aclRed,2);                  {建立实例}
  hx:=TGPSolidBrush.Create(aclYellow);       {建立实例}
  g.Clear(aclWhite);

  rect:=MakeRect(20,20,200,100);    {给结构传递数值}
  g.DrawRectangle(p,rect);     {画一个矩形}
  g.FillRectangle(hx,rect);      {填充这个矩形}

  hx.Free;    //释放实例
  p.Free;
  g.Free;
end;

end.