Delphi GDI+ 学习记录(29): 区域

//创建并填充区域

var
　g: TGPGraphics;
　sb: TGPSolidBrush;
　region: TGPRegion;　{定义区域}
begin
　g := TGPGraphics.Create(Canvas.Handle);
　sb := TGPSolidBrush.Create(aclGold);
　region := TGPRegion.Create(MakeRect(50, 50, 150, 150));　{建立区域}
　g.FillRegion(sb, region);　{填充区域}
　sb.Free;
　region.Free;
　g.Free;
end;

//根据路径建立区域

var
　g: TGPGraphics;
　path: TGPGraphicsPath;
　region: TGPRegion;
　sb: TGPSolidBrush;
const
　pts: array[0..3] of TGPPoint =
　　((x:10 ; y:10 ),
　　 (x:150; y:10 ),
　　 (x:100; y:75 ),
　　 (x:100; y:150));
begin
　g := TGPGraphics.Create(Canvas.Handle);
　sb := TGPSolidBrush.Create(aclRed);
　path := TGPGraphicsPath.Create;
　path.AddPolygon(PGPPoint(@pts), Length(pts));
　region := TGPRegion.Create(path);　{根据路径建立区域}
　g.FillRegion(sb, region);
　g.Free;
　path.Free;
　region.Free;
　sb.Free;
end;

时间： 2025-01-30 21:43:23

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