Snap when dragging guides should be focused on the pointer

[Guillermo Espertino (Gez)]

Currently, every object in the length of the guideline affects the snapping. It should be useful to have a "snapping zone" in that case, so the snapping is performed only on objects that are in the pointer area.
When someone wants to snap -for example- a guide to a rectangle edge, he/she will drag the pointer from the ruler to the edge of the target object. The user tends to "point" the target edge-node, so snapping to every object that intersects the guide, despite its location is in my oppinion less effective and prone to errors (because more objects will have influence over the snapping at the same time).

[Diederik van Lierop (mail-diedenrezi)]

Yes, this would indeed give more control! I'll start working on it right away :-)

[Diederik van Lierop (mail-diedenrezi)]

Done in rev #16989: When snapping a guide, now only the part of the guide near the pointer is considered (depends on amount of snapping tolerance)

[Guillermo Espertino (Gez) (gespertino-gmail)]

Diederik, wow that was fast!!!
Thank you very much for your inmediate response.
I've been trying the new feature and works very well.
I just noticed it snaps to nodes only, not to edges. It would be better
if edges are considered too (if snap to edges is active, of course).
The current behavior could make the user think that guides snapping is
not working (if the pointer isn't near a node).

[Diederik van Lierop (mail-diedenrezi)]

Agreed, but considering edges would require code to find the tangents of lines and Bezier curves, which is more complicated than just finding the distance of a point to a line (which we do now). It's not available in the 2geom libraries, and I don't know if there are plans for such a thing. That's why we currently only snap points to lines/curves, and it will probably stay like that for quite some time to come :-(

[Guillermo Espertino (Gez) (gespertino-gmail)]

Oh, ok. I understand.
In that case I think that just changing the description of the feature
in the guides preferences to something like"snap guides to points when
dragging" would prevent misunderstandings.

Thanks again for your work.

Diederik van Lierop escribió:
> Agreed, but considering edges would require code to find the tangents of
> lines and Bezier curves, which is more complicated than just finding the
> distance of a point to a line (which we do now). It's not available in
> the 2geom libraries, and I don't know if there are plans for such a
> thing. That's why we currently only snap points to lines/curves, and it
> will probably stay like that for quite some time to come :-(
>
>