dcl - what is the difference between text and text_part

[Jef!]

Hi everyone! I like making lisps so much I've decided to go deeper and try making dcl menus. I found many sites with neat tutorials. I noticed that few use ": text {}"

while others use ": text_part {}" but couldn't find anywhere the difference (if any).

I also made a simple dialog using both simultaneously

  [color=red]:[/color] [color=blue]text[/color][color=red]{[/color]
   [color=blue]label[/color] [color=red]=[/color] [color=magenta]"This is a Test Message"[/color][color=red];[/color]
   [color=blue]alignment[/color] [color=red]=[/color] [color=blue]centered[/color][color=red];[/color]
[color=red] }[/color]
 
 [color=red]:[/color] [color=blue]text_part[/color][color=red]{[/color]
   [color=blue]label[/color] [color=red]=[/color] [color=magenta]"This is a Test Message"[/color][color=red];[/color]
   [color=blue]alignment[/color] [color=red]=[/color] [color=blue]centered[/color][color=red];[/color]     
 [color=red]}[/color] 

and the output seemed exactly the same. Is there any difference?

[MSasu]

The difference is in the way the interpretor is alocating leading/tailing space for labels when dialog is shown; please test the below demo:

TEST : dialog {
: row {
 fixed_width = true;
 :[color=blue] text[/color] {
  key   = "t11";
  value = "ABCDEF";
  width = 5;
 }
 : text {
  key   = "t12";
  value = "12345";
  width = 4;
 }
}
: row {
 fixed_width = true;
 :[color=magenta] text_part[/color] {
  key   = "t21";
  value = "ABCDEF";
  width = 5;
 }
 : text {
  key   = "t22";
  value = "12345";
  width = 4;
 }
}
ok_only;
}

[Jef!]

mmm.. so text_part has no leading space and tail.. so using 2 text_part one after another is like having 1 single text.. that's why its named text_part. Logic.

 

Not very likely, but if someone didn't figure out why with MSasu's example, I'll illustrate with the 2 expressions below, both having the same width of 9 chars.

text_part =>(:text_part{)

text_only =>(:text{)

 

Since a text has leading/tailing space i'll represent it with " text_only " while i'll represent text_part with "text_part".

With Msasu's example this is why width change and the position shift slightly

" text_only "" text_only "

"text_part"" text_only "

 

 

Here are the 4 possibilities with 4 rows:

text_part/text_part

text_part/text

text/text_part

text/text

...all visually looking different even if they contain the same text.

"text_part""text_part"

"text_part"" text_only "

" text_only ""text_part"

" text_only "" text_only "

 

 

Thank you very much M.Sasu!