Support "snap to grid" in the Structurizr UI

[jimmcslim]

A fantastic enhancement, in my opinion. to the Structurizr UI would be to support a snap-to-grid approach. I tend to layout my diagrams with everything aligned on a coarse grid, dragging some elements close to the borders of the canvas, then distributing all the other elements evenly on both the horizontal and vertical axis, and then aligning the centers of elements for the row/column that they should appear in.

But it would be incredibly time saving if the UI would support this:

• allow a coarse grid to be rendered on the canvas. For each of the canvas sizes (A3, A4, etc) there would be fixed number of horizontal and vertical rows/columns in the grid, given the Structurizr elements are fixed size?
• I imagine that the elements would snap to the holes in the grid, rather than snapping to the intersection of horizontal/vertical lines? But this is just a personal preference - either would work I expect.
• A layout option to distribute elements to vacant holes in the grid. When dragging an element to another part of the grid, if it is already occupied, the elements would swap positions.
• Perhaps +/- buttons to increase/decrease the number of rows/columns in the grid. This would move the canvas from being one of the fixed sizes, to a custom size.
• A button to disable the 'snap when dragging' feature while retaining the visual appearance of the grid, in the event that a view diagram designer wants to break out of the grid.
• My preference would be for the grid to not actually be rendered to PNG or SVG, but that could be handy as an option perhaps?

[jimmcslim]

Gah, "holes"... I meant "cells" or empty cells, of course!