oMeta difference FW & FWH?

[Marc Vanzegbroeck]

Hi,

I'am moving a appliation from FW to FWH and have a problem with showing meta-files.

I have created a little sample that works in FW and not in FWH

Code: Select all  Expand view

#INCLUDE "fivewin.CH"
static sWnd
static sscaling  :=  3
func test()
   local oS: =5200
   local sx_offset := 0
   local sy_offset := 0
   local sregio    :=  3000

   DEFINE WINDOW sWnd TITLE 'Test' VSCROLL HSCROLL
   oMeta := TMetaFile():New( 38, 0, sregio+38, sregio,'tmp.dt',sWnd,CLR_BLACK,CLR_WHITE,sscaling,sscaling )

   ACTIVATE WINDOW sWnd MAXIMIZED ;
   VALID ( sWndOpen := .f. , .t.) on init sscale()

RETURN nil

FUNCTION sscale()
   local vverhouding:=1
   IF (sWnd:nright)-(sWnd:nleft) / (sWnd:nbottom - sWnd:ntop ) > 1.34
      vverhouding =(1024/768)/ ((sWnd:nright-sWnd:nleft) / (sWnd:nbottom - sWnd:ntop )) *1.15
   ENDIF
   sscaling := 5200 / ((sWnd:nright-sWnd:nleft) / 1032*  vverhouding)
   oMeta:nWidth  := sscaling
   oMeta:nHeight := sscaling
   oMeta:Refresh()
RETURN nil


The meta file is located
http://www.vms.be/FWTest/tmp.dt

Can anyone tell me why this is not working in FWH?
Thanks,
Marc

[Antonio Linares]

Marc,

Keep in mind that FWH uses 32 bits enhanced metafiles (EMF) instead of 16 bits Windows metafiles (WMF). Anyhow, if you rename it with .WMF extension, FWH will manage it too.

What file type is inside your DT file ?

[Marc Vanzegbroeck]

Antonio,

The tmp.dt file is a WMF-file create with the CreateMetaFile() function.
If I rename it to tmp.wmf , it still is't working.
Should I use CreateEnhMetaFile() function? I have tried it but did't succeed to get it to work.

Now I use something like:

Code: Select all  Expand view

hDCOut := CreateMetaFile('tmp.dt')
...
LineTo( hDCOut    , y_cor(inLeft + sx_offset ) ,  x_cor(430 - (inTop + sy_offset ))       , hPen)
...
TextOut( hDCOut, y_cor(y+3), x_cor(x), substr(text,1,at('.',text)-1)
...
CloseMetaFile( hDCOut )


How do I use CreateEnhMetaFile()? I see that I have to give 3 parameters instead of 1.

Thanks,
Marc[/code]

[Antonio Linares]

Marc,

You have an example of its use at source\classes\printer.prg:

AAdd( ::aMeta, ::cDir + cTempFile( "\", "emf" ) )
::hDCOut := CreateEnhMetaFile( ::hDC, ATail( ::aMeta ), ::cDocument )

[Marc Vanzegbroeck]

Antonio,

That's where I found the example, but wat should I use for ' ::hDC'?
I see in the printer.prg that it is ' GetPrintDC()', but I don't want to print it. I only want to show it on screen.
I suppose that '::cDocument ' is a desciption of the file. Is that correct?

Regards,
Marc

[Antonio Linares]

Marc,

You can do hdc = GetDC( 0 ) use it and finally do ReleaseDC( 0, hdc ).

Yes, cDocument is the name of the document.

[Marc Vanzegbroeck]

Antonio,

I have succeed to create te EMF-file, but if I want to display it I get the following error when I want to display it.

Code: Select all  Expand view

Application
===========
   Path and name: C:\FWH\Projects\oMeta\METATEST.exe (32 bits)
   Size: 1,272,832 bytes
   Time from start: 0 hours 0 mins 0 secs
   Error occurred at: 08/11/07, 13:24:55
   Error description: Error BASE/1083  Argument error: *
   Args:
     [   1] = N   100.00
     [   2] = U   

Stack Calls
===========
   Called from: TMETAFIL.PRG => TMETAFILE:PAINT(0)
   Called from: TMETAFIL.PRG => (b)TMETAFILE:TMETAFILE(0)
   Called from:  => TMETAFILE:DISPLAY(0)
   Called from: CONTROL.PRG => TMETAFILE:HANDLEEVENT(0)
   Called from: WINDOW.PRG => _FWH(0)
   Called from:  => UPDATEWINDOW(0)
   Called from: WINDOW.PRG => TWINDOW:ACTIVATE(0)
   Called from: METATEST.PRG => TEST(18)

The code to read is is the same as in previous message, only 'tmp.dt' is changed in 'tmp.emf'

The emf file is
http://www.vms.be/FWTest/tmp.emf

Thanks,
Marc[/code]

[Antonio Linares]

Marc,

Fixed. Are you using Harbour or xHarbour ? to email you a new lib.

[Marc Vanzegbroeck]

Antonio,

I'am using xHarbour.

Marc

[Antonio Linares]

We already emailed you a modified LIB for xHarbour.

Please try your code again, thanks

[Marc Vanzegbroeck]

Thanks Antonio for the quick support.

It' working!!!

Best regards,
Marc

[Antonio Linares]

good

[Marc Vanzegbroeck]

Antonio,

There is only one problem if I want to create a second EMF-file. Then I get 'Error (32) creating Enhanced metafile'

Here is an example

Code: Select all  Expand view

#INCLUDE "fivewin.CH"
static sWnd
static nZFactor
FUNCTION test()
   local hPEN := CreatePen( 0 , 1, 0 )
   local w := getsysmetrics(0) - 10
   local h := getsysmetrics(1) - 68
   nZFactor = 1

   hdc = GetDC( 0 )
   hDCOut := CreateEnhMetaFile(hdc,'tmp.emf','testje')

   MoveTo( hDCOut, 0        , 0 )
   LineTo( hDCOut, 0        ,h      , hPen)

   LineTo( hDCOut, w     ,   h    , hPen)
   LineTo( hDCOut, w     ,   0    , hPen)
   LineTo( hDCOut, 0     ,   0    , hPen)
   LineTo( hDCOut, w     ,   h    , hPen)
   LineTo( hDCOut, w     ,   0    , hPen)
   LineTo( hDCOut, 0     ,   h    , hPen)

   CloseEnhMetaFile( hDCOut )
   ReleaseDC( 0, hdc )

   DEFINE WINDOW sWnd TITLE 'Test' VSCROLL HSCROLL
   oMeta := TMetaFile():New( 38, 0, w, h,'tmp.emf',sWnd,CLR_BLACK,CLR_WHITE,h,w )

   ACTIVATE WINDOW sWnd MAXIMIZED ;
   VALID ( sWndOpen := .f. , .t.)

   hdc = GetDC( 0 )
   hDCOut := CreateEnhMetaFile(hdc,'tmp.emf','testje')

   MoveTo( hDCOut, 0        , 0 )
   LineTo( hDCOut, 0        ,h      , hPen)

   LineTo( hDCOut, w     ,   h    , hPen)
   LineTo( hDCOut, w     ,   0    , hPen)
   LineTo( hDCOut, 0     ,   0    , hPen)

   CloseEnhMetaFile( hDCOut )
   ReleaseDC( 0, hdc )

   DEFINE WINDOW sWnd TITLE 'Test' VSCROLL HSCROLL
   oMeta := TMetaFile():New( 38, 0, w, h,'tmp.emf',sWnd,CLR_BLACK,CLR_WHITE,h,w )


   ACTIVATE WINDOW sWnd MAXIMIZED ;
   VALID ( sWndOpen := .f. , .t.)

RETURN nil


Can you tell me what I'm doing wrong?

Thanks,
Marc

[Antonio Linares]

Marc,

The error 32 means that the EMF file is still open ( "sharing violation" ) so you can not create it again.

You may use a different EMF filename as it seems that Windows takes some time to close it, even if we force it to do so:

ACTIVATE WINDOW sWnd MAXIMIZED ;
VALID ( sWndOpen := .f., DeleteEnhMetaFile( oMeta:hMeta ), .t.)

[Marc Vanzegbroeck]

Antonio

Everything is working fine but I have a question using 'hdc = GetDC( 0 )' with CreateEnhMetaFile(hdc,'tmp.emf','testje').
Using this, the dimentions of the meta-file is the same as the screen resolution. Is it possible to have a bigger meta-file. My program is creating drawings, and somethimes they are bigger than the screen resolution, and with the 16bit version, the meta file was bigger then the screen. I used the scroll-bars to show the rest.

Thanks,
Marc