qelectrotech --export-dxf <project.qet> <output_dir> [--show-terminals]
writes one DXF per folio, named <NN>_<title>.dxf like the PNG and SVG
exports. Discussion #1072.
The DXF code moves out of ExportDialog into DxfExport, unchanged except
that its options come from an ExportProperties argument instead of the
dialog. The dialog and the command line both call it, and the command
line uses the dialog's default options (the preferences' export
settings), so both write the same entities.
- Createdxf answers a file it cannot open with a message box and
exit(0); the command line checks the file first and fails with a
message and exit code 1 instead.
- A note is printed when pictures become outline boxes, as the dialog
warns.
- Scripting: qet.exportDxf(outDir, showTerminals). MCP: format "dxf".
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G2d2Zi8BfrYRPX88zhaoFG
Exporting the same folio to DXF twice gave files with the same entities
in a different order, so two exports never compared equal and a DXF could
not be diffed to spot a change. The export walked diagram->items(), whose
order follows memory addresses; saving had the same fault until
bugtracker #343.
Items are now taken in stacking order (z, then insertion order, which a
load makes the file's order), from the same rect query Diagram::toXml()
uses. Anything the query misses keeps its items() place after the rest.
Checked in the Export dialog on grafcet.qet, three folios, two exports
per build: master's differ every time, these are byte-identical, and both
contain exactly the same entities, only reordered.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G2d2Zi8BfrYRPX88zhaoFG
update instead of the image a placeholder box is drawn and a warning is given during export.
Current dxf version is extremely old and does not support any image embedding. Future possible
update is the introduction of a newer dxf version export option which would allow to embed a link to an external
image file.
Follow-up to #740, which fixed the slave-side "(n-Xn)" cross-reference
label. The master-side item - the small table/cross drawn next to a
report or master element, listing where each of its slaves is used -
was still missing from DXF export. Measured against examples/
industrial.qet with the PDF export as an oracle (renders the whole
scene, so it shows what should be there):
before after PDF
slave xrefs "(n-Xn)" 41 41 41 (already fixed, #740)
folio/position strings 358 403 403
DXF now matches the PDF exactly.
## Why this needed a different approach than #740
The slave label is a plain QGraphicsTextItem - one string, trivial to
walk and re-emit as a single DXF TEXT entity, which is what #740 did.
The master-side item (CrossRefItem) is not: it paints itself with
~600 lines of hand-written QPainter calls across three modes
(drawAsCross/drawAsContacts/drawAsPlcTable), including a header
table, contact symbols, and rules. Hand-porting that logic to emit
DXF primitives directly would mean maintaining two divergent
implementations of the same drawing that have to be kept in sync by
hand forever.
## Approach: a QPaintEngine that intercepts CrossRefItem's own paint()
DxfPaintEngine/DxfPaintDevice (sources/dxfpaintdevice.{h,cpp}) is a
QPaintEngine/QPaintDevice pair - the same mechanism QPrinter and
QSvgGenerator use to redirect QPainter output elsewhere. Constructing
a QPainter on a DxfPaintDevice and calling item->paint() on it produces
DXF entities instead of pixels, using the exact same drawing code that
already renders correctly on screen. CrossRefItem::paint() is
unmodified.
Scope is deliberately narrow - only the QPainter calls CrossRefItem's
paint() is observed to make: drawLines -> LINE, drawRects/drawPath's
fill case -> outline-only LWPOLYLINE (no HATCH support in v1 - DXF's
fill primitive is a separate, more involved entity type; documented as
a known limitation rather than attempted here), drawEllipse -> CIRCLE
or a flattened polygon for rotated ellipses, drawPath's arc case (from
drawArc/drawPie) -> chord-flattened LINE segments, drawPolygon ->
LWPOLYLINE, drawTextItem -> TEXT. drawPixmap is intentionally
unimplemented (qWarning + skip) since CrossRefItem never calls it -
this is not a general-purpose DXF paint engine, and isn't meant to be
in this PR.
CrossRefItem::paint() is protected, per the normal QGraphicsItem
contract - added a small paintForExport() wrapper rather than making
paint() itself public, or reaching around access control.
## Explicitly out of scope
QetShapeItem::toDXF() and QetGraphicsTableItem::toDXF() (both already
implemented and working) are untouched. Rewriting working exporters
onto this engine to prove an architectural point would be a large,
unrelated diff with no user-visible benefit - if that consolidation is
wanted later, it's a separate proposal once this engine has shipped
and proven out on the one item that currently has no DXF export at
all.
## Testing
Built clean on Qt5/Linux. Verified via the GUI export dialog
(Fichier > Exporter > DXF) against examples/industrial.qet, 50 folios:
export completes without error or crash, all 50 .dxf files are
structurally well-formed (balanced SECTION/ENDSEC, single EOF each),
and grepping the folio-position pattern gives the before/after/PDF
numbers above. Spot-checked several real label strings (e.g. "18-B18",
"20-A2") present as TEXT entity values in the output, not just an
artifact of the count matching.
Cross-references were missing from DXF exports, as reported on the
forum: https://qelectrotech.org/forum/viewtopic.php?id=2481
generateDxf() walks the scene and collects items by cast. A slave
element's cross-reference label ("(6-G15)", pointing back to its master)
is a plain QGraphicsTextItem hung off a DynamicElementTextItem as a
child, so it matches neither the IndependentTextItem nor the
DynamicElementTextItem branch and was dropped on the floor. Nothing was
wrong with the label itself; it was simply never collected.
Collect it through the existing DynamicElementTextItem::slaveXrefItem()
accessor and draw it with the same placement, rotation and multi-line
handling as the other text items, using defaultTextColor() since a bare
QGraphicsTextItem has no DiagramTextItem::color().
Measured on examples/industrial.qet, comparing against the PDF export
(which renders the whole scene and so shows everything):
before after PDF
slave xrefs "(n-Xn)" 0 41 41
folio/position strings 317 358 403
The slave cross-references now match the PDF exactly.
Still missing, and not addressed here: the master-side cross-reference
table drawn by CrossRefItem, which accounts for the remaining 45
strings. CrossRefItem is a QGraphicsObject that renders itself with
custom QPainter code in three different modes (drawAsCross,
drawAsContacts, drawAsPlcTable) including contact symbols and rules, so
giving it a DXF representation is a larger piece of work than this.
Default arguments aren't part of a function's pointer-to-member type, so &Class::slot has a type requiring the argument regardless of its
default value -- incompatible with a signal providing none, and &Class::slot alone won't compile against these signals at all.
When migrating to the modern member pointer connect, replaced with a lambda that calls the slot with no arguments, letting
the default apply exactly as before.
- SelectAutonumW::applyEnable(bool = true), connected to each NumPartEditorW's changed() signal in both setContext() and
on_add_button_clicked(). The corresponding disconnect() in on_remove_button_clicked() is removed rather than reimplemented: a
lambda-based connection can't be matched and removed by a separately-written disconnect() call, and the explicit disconnect
was already redundant -- the very next line deletes the part object, which Qt automatically disconnects on destruction (the same
guarantee setContext()'s own qDeleteAll() cleanup already relies on).
- PartText::adjustItemPosition(int = 0), connected to QTextDocument::contentsChanged().
- ExportDialog::slot_changeFilesExtension(bool = false), connected to ExportPropertiesWidget::formatChanged().
since QComboBox::activated(QString) still exists pre-Qt6 and makes &QComboBox::activated alone ambiguous:
- StyleEditor: outline_color/line_style/size_weight/filling_color,
both connect (activeConnections(true)) and disconnect
(activeConnections(false)) branches. antialiasing's stateChanged(int)
connect modernized alongside them (single signal, no disambiguation
needed).
- TitleBlockTemplateCellWidget: cell_type_input_ (two connects to
different slots), horiz_align_input_, vert_align_input_, logo_input_.
Also modernises QETApp's system tray connect.
In two cases stateChanged already replaced with version guarded checkStateChanged for future proofing.
removed in Qt6, replaced by mappedInt/mappedWidget/mappedString.
What was broken:
* the logo-conflict rename dialog
* the system tray show/hide toggle
* the Window menu
* export dialog's per-diagram preview controls
Switched to the modern mappedInt/mappedWidget signals with pointer-to-member connect(), guarded for Qt < 5.15 until Qt5 can be dropped.
- StyleEditor: QGridLayout(this) pre-empted the widget's layout slot,
causing setLayout(main_layout) to silently fail and orphan main_layout.
Fix: use QGridLayout() without a parent so setLayout() succeeds.
- ExportDialog: ~ExportDialog() was empty, leaving ExportDiagramLine
heap objects in diagram_lines_ unfreed. Fix: qDeleteAll(diagram_lines_).
- GenericPanel::getItemForDiagram: when called without the bool* created
arg, it created a parentless QTreeWidgetItem that callers immediately
discarded. Fix: return nullptr when created==nullptr and item not found
(all callers already guard with if (item)).
- ElementScene: m_paste_area (created in initPasteArea) was temporarily
added/removed from the scene during XML loading but never freed in the
destructor. Fix: delete it if not currently in the scene.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
clazy is a compiler plugin which allows clang to understand Qt
semantics. You get more than 50 Qt related compiler warnings, ranging
from unneeded memory allocations to misusage of API, including fix-its
for automatic refactoring.
https://invent.kde.org/sdk/clazy
ispyisail