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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> WinAPI: CreatePolygonRgn - 建立多邊形區域

WinAPI: CreatePolygonRgn - 建立多邊形區域

編輯:Delphi

 本例效果圖:

WinAPI: CreatePolygonRgn - 建立多邊形區域

unit Unit1; 
 
interface 
 
uses 
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
 Dialogs, StdCtrls; 
 
type 
 TForm1 = class(TForm) 
  procedure FormPaint(Sender: TObject); 
 end; 
 
var 
 Form1: TForm1; 
 
implementation 
 
{$R *.dfm} 
 
procedure TForm1.FormPaint(Sender: TObject); 
var 
 ps: array[0..9] of TPoint; 
 Rgn: HRGN; 
begin 
 ps[0] := Point(120, 5); 
 ps[1] := Point(140, 70); 
 ps[2] := Point(210, 70); 
 ps[3] := Point(150, 100); 
 ps[4] := Point(180, 175); 
 ps[5] := Point(120, 120); 
 ps[6] := Point(60, 175); 
 ps[7] := Point(90, 100); 
 ps[8] := Point(30, 70); 
 ps[9] := Point(100, 70); 
 
 {建立多邊形區域} 
 Rgn := CreatePolygonRgn(ps, Length(ps), WINDING); 
 
 {填充區域} 
 Canvas.Brush.Color := clSilver; 
 Canvas.Brush.Style := bsCross; 
 FillRgn(Canvas.Handle, Rgn, Canvas.Brush.Handle); 
 
 {繪制區域邊界} 
 Canvas.Brush.Color := clRed; 
 Canvas.Brush.Style := bsSolid; 
 FrameRgn(Canvas.Handle, Rgn, Canvas.Brush.Handle, 2, 2); 
 DeleteObject(Rgn); 
end; 
 
end. 


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