preliminary, but working port of Cassowary Solver — GUI-oriented constraint solver, toolkit-agnostic layout engine. it's not D-spirited yet, but it works. todo list includes templated classes and bindings for gtk.d. feel free to fork and improve.

url: http://repo.or.cz/w/cassowary.d.git

On Sunday, 27 July 2014 at 11:44:35 UTC, ketmar wrote:
> preliminary, but working port of Cassowary Solver — GUI-oriented constraint solver, toolkit-agnostic layout engine. it's not D-spirited yet, but it works. todo list includes templated classes and bindings for gtk.d. feel free to fork and improve.
>
> url: http://repo.or.cz/w/cassowary.d.git
+1
http://code.dlang.org/packages/cassowary-d

On Sun, 27 Jul 2014 12:01:45 +0000
Yuriy via Digitalmars-d-announce <digitalmars-d-announce@puremagic.com>
wrote:

> +1
> http://code.dlang.org/packages/cassowary-d
damn it! my google-fu sux again. i did search and found nothing, so made a port. feel so stupid now...

On Sun, 27 Jul 2014 15:16:07 +0300
ketmar via Digitalmars-d-announce
<digitalmars-d-announce@puremagic.com> wrote:

heh. but i have a nice text parser! so it's not a completely trashcan work. ;-)

On Sunday, 27 July 2014 at 12:01:47 UTC, Yuriy wrote:
> On Sunday, 27 July 2014 at 11:44:35 UTC, ketmar wrote:
>> preliminary, but working port of Cassowary Solver — GUI-oriented constraint solver, toolkit-agnostic layout engine. it's not D-spirited yet, but it works. todo list includes templated classes and bindings for gtk.d. feel free to fork and improve.
>>
>> url: http://repo.or.cz/w/cassowary.d.git
> +1
> http://code.dlang.org/packages/cassowary-d

http://code.dlang.org/?sort=updated&category=library.scientific.linalg categorization can be better though.

> so it's not a completely trashcan work. ;-)

No way it could be! We don't like monopoly here, right? =)
I just ported the library for my own fun, and added a couple of D-ish features, like operator overloads, etc. It's not claimed to be the best one in the world =). Please feel free to continue with your own, or contributing to my lib, whatever you prefer =).

Best regards,
Yuriy Glukhov.

a small update for parser: it is now possible to parse so-called "scripts" (only from 'string' type for now). sample script can look like this one, which centers two buttons inside the panel, keepeng equal button sizes:

===[cutline]===
var(stay)
  panel.left = 0,
  panel.top = 0,
  panel.width = 80,
  panel.height = 20;


// this is just a simple constants,
// use 'define' to avoid introducing new vars
define
  button.hpadding = 4,
  button.defheight = 10+6; // simple math


var
  bt0.left, // default is 0
  bt0.top,
  <stay> bt0.width = 30,
  <stay> bt0.height = button.defheight;
    // oh, yeah, this will be calculated in-place


var
  bt1.left,
  bt1.top,
  bt1.width,
  bt1.height;


// some useful macros
define
  panel.right = (panel.left+panel.width),
  panel.bottom = (panel.top+panel.height),

  bt0.right = (bt0.left+bt0.width),
  bt0.bottom = (bt0.top+bt0.height),

  bt1.right = (bt1.left+bt1.width),
  bt1.bottom = (bt1.top+bt1.height);


// button-button placement and sizes
// default strength is <required>
bt1.left >= bt0.right+button.hpadding; // buttons padding
bt1.height == bt0.height; // same height
bt1.width == bt0.width; // same width
bt1.top == bt0.top; // same vertical position


// button-panel placement (this should center buttons)
// horizontal
bt0.left-panel.left == panel.right-bt1.right;
// vertical
bt0.top-panel.top == panel.bottom-bt0.bottom;


// print values (for debug mode)
print panel.left;
print panel.top;
print panel.width;
print panel.height;

print bt0.left;
print bt0.top;
print bt0.width;
print bt0.height;

print bt1.left;
print bt1.top;
print bt1.width;
print bt1.height;
===[cutline]===

there is no support for any kind of 'autobinding' variables to class/struct properties yet, and parser code is awful. but the whole thing is slowly growing…

anyway, it's really fun to play with various layout scripts. try it yourself!