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//画刷类 TBrush 有三个重要属性: Color、Style、Bitmap.

{Style: 样式; Delphi 为画刷定义了样式枚举 TBrushStyle, 包含以下样式:}
bsSolid
bsClear
bsHorizontal
bsVertical
bsFDiagonal
bsBDiagonal
bsCross
bsDiagCross

//下面小程序展示了上面的其中填充样式: var i,n: Integer; r: TRect; begin Canvas.Pen.Color := clRed; Canvas.Pen.Width := 1; n := 10; for i := 0 to 7 do begin Canvas.Brush.Color := clYellow; Canvas.Brush.Style := TBrushStyle(i); r := Rect(n, 10, n+36, ClientHeight-10); Canvas.FillRect(r); Canvas.Rectangle(r); n := n + 48; end; end;
//效果图:

//使用画刷的 Bitmap 属性则可以使用图片填充.

procedure TForm1.FormClick(Sender: TObject);
var
  bit: TBitmap;
begin
  bit := TBitmap.Create;
  bit.LoadFromFile('c:\temp\bg.bmp');
  Canvas.Brush.Bitmap := bit;
  Canvas.Ellipse(0, 0, ClientWidth, ClientHeight);
  bit.Free;
end;

//效果图:


posted on 2008-02-18 18:52  万一  阅读(...)  评论(...编辑  收藏