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...Capture a Delphi CLX Form?
Autor: Thierry Coq
Homepage: http://wwwusers.imaginet.fr/~tcoq/
[ Print tip ]  

Tip Rating (3):  
     


{
  Capturing a CLX form is easy, once you know.
  It took me a little time to find out, so I'm giving the knowledge to help others :
}

type
  
TFormCapturable = class(TForm)
  public
    procedure 
PrintOne;
  end;

var
  
FormCapturable: TFormCapturable;

implementation

uses
  
Qt;

procedure TFormCapturable.PrintOne;
var
  
aBitmap : TBitmap;
  aWinHandle : QWidgetH;
  aWinId : Cardinal;
  x, y, w, h : integer;
begin
  
// create a new bitmap to hold the captured screen
  
aBitMap := TBitmap.Create;
  try
    
// get a handle on the desktop
    
aWinHandle := QApplication_desktop;
    // get the Id from the desktop handle
    
aWinId := QWidget_winId( aWinHandle);
    // get the position and size of the windows
    
x := Self.Left;
    y := Self.Top;
    w := Self.Width;
    h := Self.Height;
    // capture the window into the bitmap's pixmap
    
QPixmap_grabWindow( aBitmap.Handle, aWinId, x, y, w, h);
    // save the bitmap
    
aBitMap.SaveToFile( 'c:\temp\test.bmp');
  finally
    
// don't forget to kill the bitmap after use.
    
FreeAndNil( aBitMap);
  end;
end;


 

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