Edit and draw tools: snapping / following / appending

[dg0yt]

puzzlepaint reported on Sourceforge [tickets:#7]:

Make it possible to snap to existing objects when drawing or editing.
Snapping to a path while drawing a path should start a "path follow" mode.
Snapping to a path end of the same symbol type when starting a new path should append the path to the old one.

[dg0yt]

puzzlepaint posted on Sourceforge:

• status: open --> accepted

[dg0yt]

puzzlepaint posted on Sourceforge:

This is now implemented for the path drawing tool because it is most useful there. For the other tools mentioned in the description, it is possibly not needed?

Another missing detail which could (?) be important:
The current implementation of following always snaps to the closest other path, i.e. it is not possible to cycle through existing paths which overlap at one place, like in another popular map drawing program.

[dg0yt]

puzzlepaint posted on Sourceforge:

... and another thing:
Following border lines of line symbols would also be desirable, but is not possible yet.

[dg0yt]

• labels: --> Tools
• status: accepted --> assigned
• category: --> Feature_Request

[ollesmaps]

I recently discovered I can use a snap function (Android) also for connecting paths (snapping to a path end of the same symbol type when starting a new path, that will append the path to the old one).
However it does not work always. I found out that when touching the end of path x has to appear to function. This x appears only lets say once in four times.
Can this be improved?

[dg0yt]

@ollesmaps This is a regular feature of the desktop version. I guess your issue is due to touch input lacking hover feedback. You can try if the "touch cursor", working again in 0.8.1. (The special labeled keys on Android just simulate Ctrl/Shift/Alt modifier keys on the desktop in most cases. This is far from perfect.)

[Zerbembasqwibo]

I noted something close to this, maybe an other issue? In Android only.

Select one line object.
Choose "snap" and select one more of same type.
Connect lines.
Now you cannot deselect the new object by just clicking outside the select box, you must change tool.

Think it's a bug?

[ollesmaps]

It seems to be working better in 0.8.1. I would say in 70% I get connected. If there are more symbols at one place the connecting works worse.

[ollesmaps]

@Zerbembasqwibo Tried it. The same behaviour here. I would consider it a bug.