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#include "FiveWin.ch"

STATIC oWnd, oBmp

FUNCTION Main()
   local oBar
   local cFile := ""
   local lSetAlpha := .t.
   

   DEFINE WINDOW oWnd FROM 0,0 TO 20,50 TITLE "Test READING PNG IMAGE" 
   
   define buttonbar oBar of oWnd size 48,48
   define button prompt "File" of oBar action( LoadPng( oBmp ) ) CENTER
   define button prompt "transp ON" of oBar action( oBmp:lTransparent := .T., oBmp:refresh() ) CENTER
   define button prompt "transp OFF" of oBar action( oBmp:lTransparent := .F., oBmp:refresh() ) CENTER
   define button prompt "Adjust ON" of oBar action( oBmp:lStretch := .T., oBmp:refresh() ) CENTER
   define button prompt "Adjust OFF" of oBar action( oBmp:lStretch := .F., oBmp:refresh() ) CENTER
      @ 0,0 BITMAP oBmp FILENAME cFile OF oWnd ;
         PIXEL SCROLL 
      WndCenter(oWnd:hWnd)


   ACTIVATE WINDOW oWnd ;
      ON PAINT ( oBmp:aDjClient(), oBmp:ScrollAdjust() ) ;
      ON RESIZE ( oBmp:aDjClient(), oBmp:ScrollAdjust() )

RETURN ( nil )

function LoadPng( oBmp )
    
   local cFile := cGetFile( "*.png","Select File" )
   local hPng
   
   if !Empty( cFile  )
      hPng = FWOpenPngFile( cFile )
      if IsGdiObject( hPng )
         if IsGdiObject( oBmp:hBitmap )
            DeleteObject( oBmp:hBitmap )
         endif
         oBmp:hBitmap = hPng 
         oBmp:Refresh()
      endif
   endif
   
return nil