FlexBox layout with Yoga in Python

FlexBox is a very neat layout engine available in all browsers. You can play around with it in this Playground to see which properties you need to get the desired results.

This is how to use it in Python with this project:

pip install flexbox

from flexbox import box, compute_layout

layout = compute_layout(
    box(width=610, flex_direction="row")(
        box(id="cal", flex_grow=1, flex_wrap="wrap", padding=5, justify_content="stretch")(
            box(width=90, height=90, margin=5, flex_grow=1)
            for _ in range(31)
        ),
        box(
            id="legend",
            position="absolute",
            width=200,
            height=200,
            right=25,
            top=25,
        ),
    )
)

# Access the computed layout

(layout / "legend").height
[box.width for box in layout.glob("/calender/*")]
layout["/legend"].x(0.5)  # horizontal center of the legend box


# Make a simple drawing of all boxes in the layout
from domtree.svg import svg, g, rect, text

print(
    svg(width=layout.width, height=layout.height)(
        g(name=name)(
            rect(
                fill="rgba(0,0,0,0.1)",
                stroke="rgba(0,0,0,0.4)",
                stroke_width=".3",
                x=box.left,
                y=box.top,
                height=box.height,
                width=box.width,
            ),
            text(
                x=box.x(0.5),
                y=box.y(0.5),
                text_anchor="middle",
                font_size=10,
                alignment_baseline="middle",
            )(name),
        )
        for name, box in layout.items()
    )
)