Path: news.cs.au.dk!not-for-mail
From: Manmathan Muthukumarapillai <mannan@mjolner.dk>
Newsgroups: comp.lang.beta
Subject: Re: Pixmap under Windows 9x
Date: 25 May 1999 09:01:41 -0000
Organization: Mjolner Informatics ApS, Denmark
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Mon, May 24, 1999 at 07:39:40PM +0200 Bastian wrote:
> I have problems drawing bitmaps from a file to the screen.
> To make sure that my implementation does not result any conflicts, the
> demonstration file does not work either :

Hello Bastian,

If you are trying to run demo/guienv/ReferenceDemos/drawBitmap.bet
then you have forgot the onRefresh binding, where the bitmap is drawn.
        obj: @windowItem
          (# open::
               (# 
               do (50,50) -> position;
                  (pm.width,pm.height) -> size
               #);
             eventHandler::
               (# onRefresh::
                    (# 
                    do graphics
                       (# 
                       do (pm[], (0, 0), (0, 0), pm.width,pm.height)
                            -> drawRaster
*** the above line draws the bitmap.
                       #)
                    #);
                  onMouseDown::
                    (# do drag #)
*** this let you drag the bitmap.
               #)
Sincerely,

Manmathan Muthukumarapillai / Mjolner Informatics
(mannan@mjolner.dk)

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> 
> ORIGIN '~beta/guienv/v1.6/guienv';
> INCLUDE '~beta/guienv/v1.6/graphics';
> (* This demo is an example showing how read a bitmap from a file, and
>  * using the graphics pattern to draw the bitmap on the screen.
>  *)
> --- program: descriptor ---
> guienv
> (# pm: @pixmap;
>    theWindow: @window
>      (# eventhandler::
>           (# onAboutToClose:: (# do terminate #) #);
>         obj: @windowItem
>           (# open::
>                (# 
>                do (50,50) -> position;
>                   (pm.width,pm.height) -> size
>                #);
>              eventHandler::
>                (# #)
>           #);
>         open::
>           (# 
>           do (400,400) -> size;
>              obj.open
>           #)
>      #)
> do 'picture' -> pm.read;
>    theWindow.open
> #)
> 
> The picture stored in picture.bmp does not appear on the screen.
> Why not ?
> 
> (I am using Beta v4.1 with Visual C++ v4.0 under Windows 98)
> 
> regards, 
>   Bastian