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Positioning

momapy.positioning

Functions for positioning layout elements and related objects relatively to other objects

Functions:

Name Description
above_left_of

Compute and return the point above left of the given object at a given distance
above_of

Compute and return the point above of the given object at a given distance
above_right_of

Compute and return the point above right of the given object at a given distance
below_left_of

Compute and return the point below left of the given object at a given distance
below_of

Compute and return the point below of the given object at a given distance
below_right_of

Compute and return the point below right of the given object at a given distance
fit

Compute and return the bounding box fitting a collection of objects, with given margins
fraction_of

Return the position on an arc at a given fraction and the angle formed of the tangant of the arc at that position and the horizontal
left_of

Compute and return the point left of the given object at a given distance
right_of

Compute and return the point right of the given object at a given distance
set_above_left_of

Set the position of a given builder object above left of another given object at a given distance
set_above_of

Set the position of a given builder object above of another given object at a given distance
set_above_right_of

Set the position of a given builder object above right of another given object at a given distance
set_below_left_of

Set the position of a given builder object below left of another given object at a given distance
set_below_of

Set the position of a given builder object below of another given object at a given distance
set_below_right_of

Set the position of a given builder object below right of another given object at a given distance
set_fit

Set the position, width and height of a given builder object to fit a given collection of other objects
set_fraction_of

Set the position and rotation of a given builder object to lay at a given fraction of a given arc
set_left_of

Set the position of a given builder object left of another given object at a given distance
set_position

Set the position of a given builder object
set_right_of

Set the position of a given builder object right of another given object at a given distance

above_left_of 

above_left_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None) -> Point

Compute and return the point above left of the given object at a given distance

Source code in src/momapy/positioning.py 
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def above_left_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
) -> momapy.geometry.Point:
    """Compute and return the point above left of the given object at a given distance"""
    if distance2 is None:
        distance2 = distance1
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.north_west()
    else:
        raise TypeError
    return source_point - (distance2, distance1)

above_of 

above_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float) -> Point

Compute and return the point above of the given object at a given distance

Source code in src/momapy/positioning.py 
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def above_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
) -> momapy.geometry.Point:
    """Compute and return the point above of the given object at a given distance"""
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.north()
    else:
        raise TypeError
    return source_point - (0, distance)

above_right_of 

above_right_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None) -> Point

Compute and return the point above right of the given object at a given distance

Source code in src/momapy/positioning.py 
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def above_right_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
) -> momapy.geometry.Point:
    """Compute and return the point above right of the given object at a given distance"""
    if distance2 is None:
        distance2 = distance1
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.north_east()
    else:
        raise TypeError
    return source_point + (distance2, -distance1)

below_left_of 

below_left_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None) -> Point

Compute and return the point below left of the given object at a given distance

Source code in src/momapy/positioning.py 
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def below_left_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
) -> momapy.geometry.Point:
    """Compute and return the point below left of the given object at a given distance"""
    if distance2 is None:
        distance2 = distance1
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.south_west()
    else:
        raise TypeError
    return source_point + (-distance2, distance1)

below_of 

below_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float) -> Point

Compute and return the point below of the given object at a given distance

Source code in src/momapy/positioning.py 
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def below_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
) -> momapy.geometry.Point:
    """Compute and return the point below of the given object at a given distance"""
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.south()
    else:
        raise TypeError
    return source_point + (0, distance)

below_right_of 

below_right_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None) -> Point

Compute and return the point below right of the given object at a given distance

Source code in src/momapy/positioning.py 
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def below_right_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
) -> momapy.geometry.Point:
    """Compute and return the point below right of the given object at a given distance"""
    if distance2 is None:
        distance2 = distance1
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.south_east()
    else:
        raise TypeError
    return source_point + (distance2, distance1)

fit 

fit(elements: Collection[LayoutElement | LayoutElementBuilder | Bbox | BboxBuilder | Point | PointBuilder], xsep: float = 0, ysep: float = 0) -> Bbox

Compute and return the bounding box fitting a collection of objects, with given margins

Source code in src/momapy/positioning.py 
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def fit(
    elements: collections.abc.Collection[
        momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.geometry.Point
        | momapy.geometry.PointBuilder
    ],
    xsep: float = 0,
    ysep: float = 0,
) -> momapy.geometry.Bbox:
    """Compute and return the bounding box fitting a collection of objects, with given margins"""
    if not elements:
        raise ValueError("elements must contain at least one element")
    points = []
    for element in elements:
        if momapy.builder.isinstance_or_builder(element, momapy.geometry.Point):
            points.append(element)
        elif momapy.builder.isinstance_or_builder(element, momapy.geometry.Bbox):
            points.append(element.north_west())
            points.append(element.south_east())
        elif momapy.builder.isinstance_or_builder(element, momapy.core.LayoutElement):
            bbox = element.bbox()
            points.append(bbox.north_west())
            points.append(bbox.south_east())
        else:
            raise TypeError(f"{type(element)} not supported")
    point = points[0]
    max_x = point.x
    max_y = point.y
    min_x = point.x
    min_y = point.y
    for point in points[1:]:
        if point.x > max_x:
            max_x = point.x
        elif point.x < min_x:
            min_x = point.x
        if point.y > max_y:
            max_y = point.y
        elif point.y < min_y:
            min_y = point.y
    max_x += xsep
    min_x -= xsep
    max_y += ysep
    min_y -= ysep
    width = max_x - min_x
    height = max_y - min_y
    bbox = momapy.geometry.Bbox(
        momapy.geometry.Point(min_x + width / 2, min_y + height / 2),
        width,
        height,
    )
    return bbox

fraction_of 

fraction_of(arc_layout_element: SingleHeadedArc | DoubleHeadedArc, fraction: float) -> tuple[Point, float]

Return the position on an arc at a given fraction and the angle formed of the tangant of the arc at that position and the horizontal

Source code in src/momapy/positioning.py 
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def fraction_of(
    arc_layout_element: (momapy.core.SingleHeadedArc | momapy.core.DoubleHeadedArc),
    fraction: float,
) -> tuple[momapy.geometry.Point, float]:
    """Return the position on an arc at a given fraction and the angle formed of the tangant of the arc at that position and the horizontal"""
    position, angle = arc_layout_element.fraction(fraction)
    return position, angle

left_of 

left_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float) -> Point

Compute and return the point left of the given object at a given distance

Source code in src/momapy/positioning.py 
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def left_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
) -> momapy.geometry.Point:
    """Compute and return the point left of the given object at a given distance"""
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.west()
    else:
        raise TypeError
    return source_point - (distance, 0)

right_of 

right_of(obj: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float) -> Point

Compute and return the point right of the given object at a given distance

Source code in src/momapy/positioning.py 
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def right_of(
    obj: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
) -> momapy.geometry.Point:
    """Compute and return the point right of the given object at a given distance"""
    if momapy.builder.isinstance_or_builder(obj, momapy.geometry.Point):
        source_point = obj
    elif momapy.builder.isinstance_or_builder(obj, momapy.core.Node):
        source_point = obj.east()
    else:
        raise TypeError
    return source_point + (distance, 0)

set_above_left_of 

set_above_left_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None, anchor: str | None = None)

Set the position of a given builder object above left of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_above_left_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
    anchor: str | None = None,
):
    """Set the position of a given builder object above left of another given object at a given distance"""
    position = above_left_of(obj2, distance1, distance2)
    set_position(obj1, position, anchor)

set_above_of 

set_above_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float, anchor: str | None = None)

Set the position of a given builder object above of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_above_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
    anchor: str | None = None,
):
    """Set the position of a given builder object above of another given object at a given distance"""
    position = above_of(obj2, distance)
    set_position(obj1, position, anchor)

set_above_right_of 

set_above_right_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None, anchor: str | None = None)

Set the position of a given builder object above right of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_above_right_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
    anchor: str | None = None,
):
    """Set the position of a given builder object above right of another given object at a given distance"""
    position = above_right_of(obj2, distance1, distance2)
    set_position(obj1, position, anchor)

set_below_left_of 

set_below_left_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None, anchor: str | None = None)

Set the position of a given builder object below left of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_below_left_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
    anchor: str | None = None,
):
    """Set the position of a given builder object below left of another given object at a given distance"""
    position = below_left_of(obj2, distance1, distance2)
    set_position(obj1, position, anchor)

set_below_of 

set_below_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float, anchor: str | None = None)

Set the position of a given builder object below of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_below_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
    anchor: str | None = None,
):
    """Set the position of a given builder object below of another given object at a given distance"""
    position = below_of(obj2, distance)
    set_position(obj1, position, anchor)

set_below_right_of 

set_below_right_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance1: float, distance2: float | None = None, anchor: str | None = None)

Set the position of a given builder object below right of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_below_right_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance1: float,
    distance2: float | None = None,
    anchor: str | None = None,
):
    """Set the position of a given builder object below right of another given object at a given distance"""
    position = below_right_of(obj2, distance1, distance2)
    set_position(obj1, position, anchor)

set_fit 

set_fit(obj: NodeBuilder | BboxBuilder, elements: Collection[Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder], xsep: float = 0, ysep: float = 0, anchor: str | None = None)

Set the position, width and height of a given builder object to fit a given collection of other objects

Source code in src/momapy/positioning.py 
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def set_fit(
    obj: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    elements: collections.abc.Collection[
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ],
    xsep: float = 0,
    ysep: float = 0,
    anchor: str | None = None,
):
    """Set the position, width and height of a given builder object to fit a given collection of other objects"""
    bbox = fit(elements, xsep, ysep)
    obj.width = bbox.width
    obj.height = bbox.height
    set_position(obj, bbox.position, anchor)

set_fraction_of 

set_fraction_of(obj: NodeBuilder, arc_layout_element: SingleHeadedArc | DoubleHeadedArc, fraction: float, anchor: str | None = None)

Set the position and rotation of a given builder object to lay at a given fraction of a given arc

Source code in src/momapy/positioning.py 
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def set_fraction_of(
    obj: momapy.core.NodeBuilder,
    arc_layout_element: (momapy.core.SingleHeadedArc | momapy.core.DoubleHeadedArc),
    fraction: float,
    anchor: str | None = None,
):
    """Set the position and rotation of a given builder object to lay at a given fraction of a given arc"""
    position, angle = fraction_of(arc_layout_element, fraction)
    rotation = momapy.geometry.Rotation(angle, position)
    set_position(obj, position, anchor)
    obj.transform = momapy.core.TupleBuilder([rotation])

set_left_of 

set_left_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float, anchor: str | None = None)

Set the position of a given builder object left of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_left_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
    anchor: str | None = None,
):
    """Set the position of a given builder object left of another given object at a given distance"""
    position = left_of(obj2, distance)
    set_position(obj1, position, anchor)

set_position 

set_position(obj: NodeBuilder | BboxBuilder, position: Point | PointBuilder, anchor: str | None = None)

Set the position of a given builder object

Source code in src/momapy/positioning.py 
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def set_position(
    obj: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    position: momapy.geometry.Point | momapy.geometry.PointBuilder,
    anchor: str | None = None,
):
    """Set the position of a given builder object"""
    obj.position = position
    if anchor is not None:
        p = getattr(obj, anchor)()
        obj.position += obj.position - p

set_right_of 

set_right_of(obj1: NodeBuilder | BboxBuilder, obj2: Point | PointBuilder | Bbox | BboxBuilder | LayoutElement | LayoutElementBuilder, distance: float, anchor: str | None = None)

Set the position of a given builder object right of another given object at a given distance

Source code in src/momapy/positioning.py 
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def set_right_of(
    obj1: momapy.core.NodeBuilder | momapy.geometry.BboxBuilder,
    obj2: (
        momapy.geometry.Point
        | momapy.geometry.PointBuilder
        | momapy.geometry.Bbox
        | momapy.geometry.BboxBuilder
        | momapy.core.LayoutElement
        | momapy.core.LayoutElementBuilder
    ),
    distance: float,
    anchor: str | None = None,
):
    """Set the position of a given builder object right of another given object at a given distance"""
    position = right_of(obj2, distance)
    set_position(obj1, position, anchor)