Add proportional layout and tests

[tinchodias]

Fixes #260

Note: It still doesn't take into account minWidth and minHeight. It should, right?
Also, eventually a negative extent.
So another commit must work on those.

[tinchodias]

Unrelated test failures.

[tinchodias]

Given:

  aContainer := BlElement new
    layout: BlProportionalLayout new;
    yourself

that element can have as children elements like this:

  BlElement new
    margin: (BlInsets all: 7);
    constraintsDo: [ :c |
      c proportional fractions:
        (Rectangle
          left: 5 percent
          right: 95 percent
          top: 10 percent
          bottom: 90 percent ) ].

The 5 percent evaluates to the float 0.5. It only provides a more human readable way to express it (maybe).
The Bloc elements have a margin, which is equivalent to the "offset" of the Morphic proportional layout.

The child's constraints can look like this, too:

    constraintsDo: [ :c |
      c proportional horizontal
        leftFraction: 0.05;
        rightFraction: 0.95 ];
      c proportional vertical
        topFraction: 0.1;
        bottomFraction: 0.9 ]

Both horizontal and vertical are part of the inherited layout API, so the BlProportionalLayout also supports them.

[plantec]

super thanks

[labordep]

Thanks @tinchodias !

[tinchodias]

I removed [:c | c proportional fractions: Rectangle ... ] API after feedback from Stef. Basically, to avoid making the user to create 3 objects (1 Rectangle = 2 Points), to specify those fraction values that at the end, the constraints already hold as 4 numbers by separate.

I have another discussion:
Do we search a better name than "fraction" for the API?
May be "ratio"? leftRatio, rightRatio, etc.?
I don't like "proportion" , because it sounds too long and redundant, like [:c | c proportional horizontal leftProportion: 0.5 ]

[labordep]

Thanks Martín, Why do not use simply left: right: etc. ? like [:c | c proportional horizontal left: 0.5 ] Pierre De : Martín Dias ***@***.***> Envoyé : vendredi 26 mai 2023 16:34 À : pharo-graphics/Bloc ***@***.***> Cc : Pierre Laborde ***@***.***>; Comment ***@***.***> Objet : Re: [pharo-graphics/Bloc] Add proportional layout and tests (PR #261) I removed [:c | c proportional fractions: Rectangle ... ] API after feedback from Stef. Basically, to avoid making the user to create 3 objects (1 Rectangle = 2 Points), to specify those fraction values that at the end, the constraints already hold as 4 numbers by separate. I have another discussion: Do we search a better name than "fraction" for the API? May be "ratio"? leftRatio, rightRatio, etc.? I don't like "proportion" , because it sounds too long and redundant, like [:c | c proportional horizontal leftProportion: 0.5 ] — Reply to this email directly, view it on GitHub <#261 (comment)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/ALXHU3GHHSWKTEN7F5AJNF3XIC5L3ANCNFSM6AAAAAAYPNRURE> . You are receiving this because you commented. <https://github.com/notifications/beacon/ALXHU3GA5HIPTKU2PE2B32LXIC5L3A5CNFSM6AAAAAAYPNRURGWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTS5IAYLY.gif> Message ID: ***@***.*** ***@***.***> >

[tinchodias]

@labordep I like your idea!!!

[tinchodias]

Well, so let's merge!