WVT_DrawPicture() - proportional picture and correct size

[Sergy]

Hello friends.

I need to demonstrate goods samples in app window. I call WVT_DrawPicture(1,1,MAXROW(),40,cFileName, ,.T.)

When my picture has "landscape" proportions - user can see normal image:

But, when the picture has "portrait" proportions - user can see only part of it:

I would like to use all possible app window area to show picture with right scale and full size.

Which parameters I should pass to DrawImage() do achieve this ?

Why WVT_DrawImage() ignores 3rd parameter (nRowMax) and stretches image too high ?

Thank you.

[Pritpal Bedi]

Hi

This function has following parameters:

Wvt_DrawPicture( nTop, nLeft, nBottom, nRight, nSlot, aPxlOff, lDoNotScale ) -> lOk

Which library you are using to call your function? 

WVT_DrawPicture(1,1,MAXROW(),40,cFileName, ,.T.)

From where parameter <cFileName> is substituted for <nSlot> ?

Pritpal Bedi

a student of software analysis & concepts

[Sergy]

Hi Pritpal

Sorry for my typo - I use Wvt_DrawImage(), not Wvt_DrawPicture(). 

My pictures stored in separate *.jpg files and I need to show those files.

[Pritpal Bedi]

Hi

Can you send me a compilable code with the images which is ready for testing ?

I do not have much time but I think I know where is the issue.

[Sergy]

Hi Pritpal

https://www.dropbox.com/sh/zm7ghl5trofkoxl/AAAcO59eGcOw3KEPTrMz4w6Ga?dl=0

There are prg, hbp, exe and two jpg files - portrait and landscape.

Thank you.

[Pritpal Bedi]

Hi Sergy

https://www.dropbox.com/sh/zm7ghl5trofkoxl/AAAcO59eGcOw3KEPTrMz4w6Ga?dl=0

Thanks for the code.

Please test after this commit and report back.

2016-01-03 09:24 UTC-0800 Pritpal Bedi (bedipritpal/at/hotmail.com)

[Qatan]

Hello Pritpal,

 

I tested it but I notice that the image disappears when I change the windows size (using the mouse).

Is it expected or is there any configuration to avoid that?

Thanks

 

Qatan

 

[Pritpal Bedi]

Hi Qatan

I tested it but I notice that the image disappears when I change the windows size (using the mouse).

Is it expected or is there any configuration to avoid that?

To avoid that you have two options:

1. Follow the protocol adopted in gtwvg/tests/demowvg.*prg.

2. Use Wvg_Image() which has persistence but it also needs some more tweaks. 

    Look for example in C:\harbour\contrib\gtwvg\tests\_cuigdlg.prg. It is easy to implement.

Images are not embedded in any of the GT's as is. You need some mechanism to impose them 

on top of the GT whenever Windows issues a repaint request.

[Qatan]

Hello Pritpal,

 

*1. Follow the protocol adopted in gtwvg/tests/demowvg.*prg.

*2. Use Wvg_Image() which has persistence but it also needs some more tweaks.

*    Look for example in C:\harbour\contrib\gtwvg\tests\_cuigdlg.prg. It is easy to implement.

*

*Images are not embedded in any of the GT's as is. You need some mechanism to impose them

*on top of the GT whenever Windows issues a repaint request.

 

 

Thanks you for answering.

I will look into it.

 

Regards,

 

Qatan

 

[Sergy]

Hi Pritpal

Thank you for support.

But "my kung-fu isn't good enough" - I use "nightly builds" from here: http://sourceforge.net/projects/harbour-project/files/binaries-windows/nightly/

Just look at fresh harbour-nightly-win.7z - archive has changelog.txt with date 2016-01-02. But - the last commit is:

/*

 * $Id: cc052b94d695e20623b4f41ff1a4e6f4a7aabbf3 $

 */

/* Read doc/howtorep.txt and use this format for entry headers:

   YYYY-MM-DD HH:MM UTC[-|+]hhmm Your Full Name (your_email address)

   2013-12-31 13:59 UTC+0100 Foo Bar (foo.bar foobar.org)

   See copyright/license at the end of the file.

   Encoding: UTF-8 (No BOM)  Notation (in 5th position):

     * Change, ! Fix, % Optimization, + Addition, - Removal, ; Comment

 */

2015-12-05 10:58 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)

  + tests/getblock.prg

    + added test code for GET SetGet block for aliased macro variables

2015-12-05 10:05 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)

  * src/rtl/gtos2/gtos2.c

    ! fixed GCC builds - many thanks to David Macias

...

last month ago ???

Is it correct?

May be I do something wrong ?

WBR, Sergy.

воскресенье, 3 января 2016 г., 20:36:49 UTC+3 пользователь Pritpal Bedi написал:

[Sergy]

Hi Pritpal

Sorry for delaying in answer - I sorted out with "nightly" and "daily" builds - from time I downloaded Harbour 3.2 (ver ~20150615) some stuff was changed and ready-to=use "nightly builds" doesn't updated since 2015-12-05.

In common - when I use WVT_DrawImage(1,1,MAXROW(),40,cFileName,,.T.) - seems be ok.

But then I changed parameters to (1,1,MAXROW()-1,MAXCOL()-1,cFileName,,.T.) - as I planned before to use all app screen area.

The "portrait" and "square" pictures looking good, but "landscape" - not:

I updated by old link - prg, exe and add some pics to demonstrate this behavior. 

Thank you for support.

Sergy.

воскресенье, 3 января 2016 г., 20:36:49 UTC+3 пользователь Pritpal Bedi написал:

Hi Sergy

[Pritpal Bedi]

Thanks Sergy

I hope now it is fixed properly.

2016-01-07 12:16 UTC-0800 Pritpal Bedi (bedipritpal/at/hotmail.com)

[Sergy]

Thank you, Pritpal.

Now WVT_DrawImage() works perfect.

WBR,

Sergy

четверг, 7 января 2016 г., 23:26:09 UTC+3 пользователь Pritpal Bedi написал: