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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> WinAPI: PathToRegion - 將路徑轉換為區域

WinAPI: PathToRegion - 將路徑轉換為區域

編輯:Delphi

本例效果圖:

WinAPI: PathToRegion - 將路徑轉換為區域

unit Unit1; 
 
interface 
 
uses 
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
 Dialogs; 
 
type 
 TForm1 = class(TForm) 
  procedure FormPaint(Sender: TObject); 
 end; 
 
var 
 Form1: TForm1; 
 
implementation 
 
{$R *.dfm} 
 
procedure TForm1.FormPaint(Sender: TObject); 
const 
 str = 'Delphi'; 
var 
 Rgn: HRGN; 
 x,y: Integer; 
begin 
 Canvas.Font.Size := 68; 
 Canvas.Font.Style := [fsBold]; 
 SetBkMode(Canvas.Handle, TRANSPARENT); 
 
 x := (ClIEntWidth - Canvas.TextWidth(str)) div 2; 
 y := (ClIEntHeight - Canvas.TextHeight(str)) div 3; 
 
 {建立路徑} 
 BeginPath(Canvas.Handle); 
 Canvas.TextOut(x, y, str); 
 EndPath(Canvas.Handle); 
 
 {將路徑轉換為區域} 
 Rgn := PathToRegion(Canvas.Handle); 
 
 {繪制} 
 Canvas.Brush.Color := clSilver; 
 Canvas.Brush.Style := bsDiagCross; 
 FillRgn(Canvas.Handle, Rgn, Canvas.Brush.Handle); 
 Canvas.Brush.Color := clRed; 
 Canvas.Brush.Style := bsSolid; 
 FrameRgn(Canvas.Handle, Rgn, Canvas.Brush.Handle, 1, 1); 
 
 DeleteObject(Rgn); 
end; 
 
end. 


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