Pixel width for DCL dialogs

Hi,

does anyone know a way to define the width of a DCL dialog box in pixel units? The command

width = 200;

makes the dialog window not 200 pixels wide, but fills nearly the whole width of the screen (1600 pixels).

In my experience, the following formulae provide a good approximation:

tw = pw/6

th = ph/13

Where:

tw / th = Tile Width / Height

pw / ph = Pixel Width / Height

Hence, for a 200x100 pixel tile, you would use the following:

width = 33.33;

height = 7.69;

fixed_width = true;

fixed_height = true;

Example:

test : dialog
{
   spacer;
   : image
   {
       key = "img";
       width = 33.33;
       height = 7.69;
       fixed_width = true;
       fixed_height = true;
       color = 0;
   }
   spacer;
   ok_only;
}

Thanks a lot.

Do you or does anyone know why DCL has this behaviour, that seems to me somewhat lunatic? Dialog windows don't make any sense but on a screen, so it would be natural to use the same units as the screen does - pixels, that is.

As stated in the Developer Documentation, DCL uses units corresponding to the height & width of characters:

width

 

Possible values are an integer or a real number representing the distance in character-width units.

 

...

 

Character width units are defined as the average width of all uppercase and lowercase alphabetic characters, or the screen width divided by 80, whichever is less (average width is (width(A .. Z) + width (a .. z)))/52 ).

height

 

Possible values are an integer or a real number representing the distance in character height units.

 

...

 

Character-height units are defined as the maximum height of screen characters (including line spacing).

Though, I do not know why these units were chosen.

Well ... thanks anyway.