Most symbols stored in older projects have no uuid on their terminals
(706 of the 900 in the 24 examples), so a terminal's identity is worked
out from where it sits in its symbol on every load (stableUuid()). That
is only sound while nothing keyed on it is kept between loads.
- On opening a project, every terminal of its embedded symbols without a
uuid gets that same derived value (TerminalUuids::fillMissing(), from
XmlElementCollection's loading constructor, before any folio is
built). The next save writes it, and the wires on it in the form that
names terminals by uuid, which QElectroTech reads since 0.8.0.
- The recipe moves to TerminalUuids::derived(), which stableUuid() now
calls, so the two cannot drift apart. A second terminal at the same
point of a symbol gets the next occurrence, and no value is given
twice within a symbol.
- findTerminal(): a wire whose terminal uuid is not found is matched to
the terminal whose derived value it is, so a saved uuid still finds its
terminal after the symbol's definition was replaced by one whose
terminals carry other uuids.
The project database's terminal and conductor tables are identical before
and after on all 24 examples except the 3 terminals that share a point
with another in their symbol (industrial.qet 1, perceuse.qet 2), which
now have an identity of their own. Every example keeps every wire through
a resave, and a second save changes nothing.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Review of the previous commit:
- keep() could give an old uuid to a new terminal while another terminal
of the new definition already carried it (a moved terminal), leaving
two terminals with one uuid. A terminal carrying any old uuid is now
left alone, and an old uuid already in use is never handed out.
- copyDirectory() replaced a whole category of the embedded collection
(drag a folder onto the project's folder of the same name) without
carrying terminal uuids over. keepInDirectory() walks both trees by
name and calls keep() on each symbol.
- The "wire(s) not loaded" log line repeated the folio's list on every
paste; it is now written only when a folio is loaded.
tst_terminaluuids: 3 new cases, each red on the previous keep().
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A wire whose terminals have uuids is saved against them, and on load it
is reattached to a terminal with that uuid or dropped, with only a qDebug
line. Re-importing a changed symbol and choosing "replace" swapped the
project's definition for one whose terminal uuids differ; the placed
symbols kept the old ones until the project was reopened, so every wire
on them was lost at the next open, silently, and gone for good at the
next save.
- XmlElementCollection::copyElement(), where an embedded definition is
overwritten, carries each old terminal uuid onto the new terminal at
the same place and orientation (TerminalUuids::keep()). Terminals that
moved, and new ones, keep their own.
- Diagram::fromXml() records wires it could not reattach, logs them, and
the editor lists them in one warning after opening a project.
Measured on 2612_ats_singlephase.qet with the stored splice's terminal
uuids made to differ from the collection's: replace, save, reopen loads
34 of 131 wires on master, 131 with this change (GUI, both arms).
tst_terminaluuids covers keep() and runs the real loader.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The child lookup iterated parent_element.childNodes() via item(i), and
QDomNodeList::item() walks the sibling chain from the start on every
call - making the loop quadratic in the number of children, with an
extra QList allocation and a second pass on top. This lookup runs
several times per element instance while loading a project, against the
"import" category that holds every embedded definition, so the cost
scales with (instances x embedded definitions).
Replace it with a firstChildElement()/nextSiblingElement() walk with an
early return. Same semantics (first tag+name match in document order).
Measured on the Kaefer_1303 reference project (3.9 MB, 23 folios,
432 instances, media of 6 runs, Windows/MinGW, same GCC for both):
before after
Qt5 5.116 s 5.068 s
Qt6 6.683 s 4.640 s (-31 %)
This removes the entire Qt6 load-time regression discussed in #553 -
Qt6 goes from +31 % slower to 8 % faster than Qt5 on the very project
that exposed it (Qt6''s QDom makes the quadratic pattern much more
expensive than Qt5''s did). Smaller projects gain too (3.4 MB example:
-9 % on Qt6).
(cherry picked from commit 0d4ef8eca27601c37ba2b75d7c058e9d8e2beea4)
the feature "clean project" does not clean unused elements yet
git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@4561 bfdf4180-ca20-0410-9c96-a3a8aa849046
Now Qet only use the new embbeded collection (XmlElementCollection).
No need to reload the old element panel for add a new element created by the new element panel
Elements are always imported to the embbeded collection of a project
git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@4468 bfdf4180-ca20-0410-9c96-a3a8aa849046
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