nsLayoutAttributesAsDict.py

import AppKit

layoutAttribute = {
   "left": AppKit.NSLayoutAttributeLeft,
   "right": AppKit.NSLayoutAttributeRight,
   "top": AppKit.NSLayoutAttributeTop,
   "bottom": AppKit.NSLayoutAttributeBottom,
   "leading": AppKit.NSLayoutAttributeLeading,
   "trailing": AppKit.NSLayoutAttributeTrailing,
   "width": AppKit.NSLayoutAttributeWidth,
   "height": AppKit.NSLayoutAttributeHeight,
   "centerX": AppKit.NSLayoutAttributeCenterX,
   "centerY": AppKit.NSLayoutAttributeCenterY,
   "baseline": AppKit.NSLayoutAttributeBaseline,
   "lastBaseline": AppKit.NSLayoutAttributeLastBaseline,
   "firstBaseline": AppKit.NSLayoutAttributeFirstBaseline,
}

layoutRelation = {
    "<=": AppKit.NSLayoutRelationLessThanOrEqual,
    "==": AppKit.NSLayoutRelationEqual,
    ">=": AppKit.NSLayoutRelationGreaterThanOrEqual
}

import vanilla

w = vanilla.Window((400, 400), minSize=(200, 200))

w.v1 = vanilla.TextEditor("auto", "editor 1")

w.v2 = vanilla.TextEditor("auto", "editor 2")



constraints = [
    dict(view1=w.v1, view2=w, attribute1="top", attribute2="top", relation="=="),
    dict(view1=w.v1, view2=w, attribute1="bottom", attribute2="centerY", relation="=="),
    dict(view1=w.v1, view2=w, attribute1="left", attribute2="left", relation="=="),
    dict(view1=w.v1, view2=w, attribute1="right", attribute2="right", relation="=="),
    
    dict(view1=w.v2, view2=w.v1, attribute1="top", attribute2="bottom", relation="=="),
    dict(view1=w.v2, view2=w, attribute1="bottom", attribute2="bottom", relation="=="),
    dict(view1=w.v2, view2=w, attribute1="left", attribute2="left", relation="=="),
    dict(view1=w.v2, view2=w, attribute1="right", attribute2="right", relation="=="),

]


view = w._getContentView()
layoutConstraints = []

for constraint in constraints:
    view1 = constraint["view1"]
    view1 = view1._getContentView()
    view2 = constraint["view2"]
    view2 = view2._getContentView()

    constraint = AppKit.NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
        view1,
        layoutAttribute[constraint["attribute1"]],
        layoutRelation[constraint.get("relation", "==")],
        view2,
        layoutAttribute[constraint["attribute2"]],
        constraint.get("multiplier", 1),
        constraint.get("constant", 0)
    )
    layoutConstraints.append(constraint)
view.addConstraints_(layoutConstraints)


w.open()