//绘制与填充路径
var
  g: TGPGraphics;
  path: TGPGraphicsPath;
  p: TGPPen;
  sb: TGPSolidBrush;
begin
  g := TGPGraphics.Create(Canvas.Handle);
  p := TGPPen.Create(MakeColor(128,255,0,0),4);
  sb := TGPSolidBrush.Create(MakeColor(128,255,255,0));
  path := TGPGraphicsPath.Create;

  path.StartFigure;
  path.AddLine(MakePoint(11,11), MakePoint(222,111));
  path.AddBezier(MakePoint(11,11), MakePoint(33,111), MakePoint(66,6),MakePoint(111,111));
  path.CloseFigure;

  g.DrawPath(p, path);
  g.FillPath(sb, path);

  p.Free;
  sb.Free;
  path.Free;
  g.Free;
end;

//路径中的拐点结合 var g: TGPGraphics; p: TGPPen; path: TGPGraphicsPath; p1,p2,p3: TGPPoint; begin g := TGPGraphics.Create(Canvas.Handle); p:= TGPPen.Create(MakeColor(255, 0, 0, 255),8); path:= TGPGraphicsPath.Create; p1.X := 50; p1.Y := 200; p2.X := 100; p2.Y := 200; p3.X := 100; p3.Y := 250; path.AddLine(p1, p2); path.AddLine(p2, p3); p.SetLineJoin(LineJoinBevel); {设置结合样式} g.DrawPath(p, path); path.Free; p.Free; g.Free; end;
路径中的拐点结合样式:

Delphi 微软 说明
LineJoinBevel Bevel 指定成斜角的联接。这将产生一个斜角。
LineJoinMiter Miter 指定斜联接。这将产生一个锐角或切除角,具体取决于斜联接的长度是否超过斜联接限制。
LineJoinMiterClipped  MiterClipped  指定斜联接。这将产生一个锐角或斜角,具体取决于斜联接的长度是否超过斜联接限制。
LineJoinRound Round 指定圆形联接。这将在两条线之间产生平滑的圆弧。


posted on 2007-12-27 19:06  万一  阅读(3952)  评论(3编辑  收藏  举报