On Wednesday, February 1, 2017 at 5:04:11 PM UTC, papl...@gmail.com wrote:
>
> I'm trying to create a simple SVG app (rectangle, text, arrow), but can't
> seem to align them properly without getBBox (not even with monospaced
> fonts).
> Is there really no way to get back any information from the browser
> without a proper event?
>
The problem with just encoding a getBBox or getDimensions or getSize
function in Elm is that it could return different values when called
multiple times, so it is not really a function. However, you could use a
port to ask for a size, and a subscription to get the result.
I have a similar issue where I want to get the size of a div, and have now
worked out a solution using MutationObserver to watch for changes to the
div and report its new size on every change.
So these kinds of queries do fit within the Elm model. Perhaps we could
start asking for a proper 'effect' module to support these and other
related queries.
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