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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 路徑 - SetFillMode

路徑 - SetFillMode

編輯:Delphi
代碼文件:unit Unit1;
interface
uses
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 Dialogs, StdCtrls, ExtCtrls;
type
 TForm1 = class(TForm)
  RadioGroup1: TRadioGroup;
  procedure FormCreate(Sender: TObject);
  procedure FormPaint(Sender: TObject);
  procedure RadioGroup1Click(Sender: TObject);
 end;
var
 Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ, GDIPAPI, TypInfo;
procedure TForm1.FormCreate(Sender: TObject);
var
 i: Integer;
begin
 RadioGroup1.Columns := 2;
 RadioGroup1.Caption := '路徑填充模式';
 for i := 0 to 1 do
  RadioGroup1.Items.Add(GetEnumName(TypeInfo(TFillMode), i));
 RadioGroup1.ItemIndex := 0;
end;
procedure TForm1.FormPaint(Sender: TObject);
var
 g: TGPGraphics;
 b: TGPBrush;
 p: TGPPen;
 path: TGPGraphicsPath;
 rect: TRect;
begin
 g := TGPGraphics.Create(Canvas.Handle);
 b := TGPHatchBrush.Create(HatchStyleCross, aclSilver, aclKhaki);
 p := TGPPen.Create(aclRed, 1.75);
 path := TGPGraphicsPath.Create;
 rect := Bounds(10, 20, 150, 100);
 path.AddEllipse(MakeRect(rect));
 OffsetRect(rect, 60, 0);
 path.AddEllipse(MakeRect(rect));
 if RadioGroup1.ItemIndex = 1 then path.SetFillMode(FillModeWinding);
 g.FillPath(b, path);
 g.DrawPath(p, path);
 p.Free;
 b.Free;
 path.Free;
 g.Free;
end;
procedure TForm1.RadioGroup1Click(Sender: TObject);
begin
 Repaint;
end;
end.
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