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Link popup: go to the sheet the other end of the link is on

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Right-clicking a wire or a knob now offers Go to Link Wire Sheet "<name>",
naming the sheet the far end is on -- the end a grey knob stands in for. A link
with both ends on the open sheet has nowhere to go, so the entry is left off
rather than greyed out.

find_component_by_path turns a link's from/to reference back into the component
it points at, the inverse of get_component_path, and the sheet is that
component's parent; a parent of <app> is the file's root node, which the popup
names after the file.

Arriving selects the same link and scrolls it to the middle of the view. It is
found by its element rather than by the tag it was picked on, since a repaint
hands out fresh wire tags, and it waits for that repaint from an after_idle
callback: ttk queues its selection event rather than dispatching it, so the
sheet is not painted when the tree node is selected -- and painting a sheet
clears the selected link, which was wiping the selection this feature had just
made. The jump is an ordinary sheet opening, so Back returns to where the link
was picked.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Arda
2026-09-04 23:26:46 +03:00
co-authored by Claude Opus 5
parent ad8396ef7b
commit a1f8059c49
4 changed files with 191 additions and 3 deletions
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README.md
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@@ -128,6 +128,24 @@ element has left the document, keeping the position on screen. Walking the histo
the tree selection, which is what paints the sheet, and is suppressed from recording so a
walk cannot rewrite the trail it is following.
### Following a link to its other sheet
Right-clicking a wire or a knob offers **Go to Link Wire Sheet "<name>"** alongside Delete
Link, naming the sheet the far end of that link is on -- the end a grey knob stands in
for. The entry is left off a link with both ends on the open sheet, which has nowhere to
go. `find_component_by_path` in `sax_dom` turns a `<link>`'s from/to reference back into
the component it points at, the inverse of `get_component_path`, and the sheet is that
component's parent; a parent of `<app>` is the file's root node, which the popup names
after the file.
The jump selects the same link again once it arrives. It has to be found by its element
rather than by the tag it was picked on, because a repaint hands out fresh wire tags, and
it has to wait for that repaint: ttk queues its selection event rather than dispatching
it, so the sheet is not painted at the point the tree node is selected -- and painting a
sheet clears whatever link was selected. The selection is therefore made from an
`after_idle` callback, and the link is scrolled to the middle of the view. Arriving is an
ordinary sheet opening, so **Back** returns to the sheet the link was picked on.
### Testing without a window
`app_state`, `sax_dom`, `schema`, `undo` and `wiresheet` import with no display, so the