Follow-up to the eventFilter fix: testing showed double-click works
when QET is already running, but a cold launch (app not running yet)
still opens an empty window. Finder/Launch Services can deliver the
QFileOpenEvent to the QApplication's native event loop before main()
reaches the point where QETApp is constructed and its real eventFilter
is installed -- there's a window between 'SingleApplication app(...)'
and 'QETApp qetapp;' during which the event can arrive and be lost.
Add a minimal EarlyFileOpenCatcher installed on app immediately after
it's constructed (before anything else can run an event loop). It only
buffers the file path. Once QETApp exists, main() swaps it out for the
real QETApp::eventFilter and drains anything that was buffered via
qetapp.openFiles(), so no cold-launch QFileOpenEvent is silently
dropped.
Confirmed by manual testing:
- 'open app --args file' on .qet/.elmt/.titleblock: OK (already worked)
- double-click while app already running: OK (already worked)
- double-click cold launch: previously opened an empty window, this
buffers and replays the event so it now opens the right editor.
Root cause (see issue #218 discussion):
- QETApp::eventFiltrer (Q_OS_DARWIN) was correct in intent but never
actually installed as an event filter anywhere, and its name didn't
match the QObject::eventFilter virtual signature, so even if it had
been installed it would never have been invoked as an override.
Confirmed dead code.
- main.cpp instead routed Finder's QFileOpenEvent through
MacOSXOpenEvent -> SingleApplication::sendMessage(), which is the
secondary-to-primary IPC channel. Called from within the primary
instance itself, sendMessage() fails silently and the file path is
dropped, which is exactly what double-click does (Finder doesn't spawn
a secondary process, the running instance receives the FileOpen event
directly).
- openFiles() takes a QETArguments, not a QStringList. The dead code's
openFiles(QStringList() << filename) only worked via an untested
implicit QStringList -> QList<QString> -> QETArguments conversion
chain.
Fix:
- Rename eventFiltrer -> eventFilter (qetapp.h/.cpp) so it's a proper
override of QObject::eventFilter, and make it public so main.cpp can
install it on QApplication.
- Build the QETArguments explicitly instead of relying on implicit
conversion.
- main.cpp: drop MacOSXOpenEvent entirely (include + instantiation),
install qetapp as the Q_OS_MACOS event filter on app right after
QETApp qetapp; is constructed and before app.exec(). No race window:
the event loop hasn't started, so no QFileOpenEvent can be delivered
before the filter is installed.
QETArguments::handleFileArgument() already sorts files by extension
(.elmt, titleblock, else project) and openFiles() already fans out to
openProjectFiles()/openElementFiles()/openTitleBlockTemplateFiles()
accordingly, so this single fix covers .qet, .elmt and .titleblock
double-click/drag-to-dock on macOS, not just .qet.
SingleApplication's sendMessage/receivedMessage flow (used for CLI args
on all platforms) is untouched; this only touches the Q_OS_MACOS block,
so there is no behavior change on Windows/Linux.
Follow-up (not included here): the macOS Info.plist (misc/Info.plist)
has an empty CFBundleShortVersionString, which may affect macOS's
willingness to retain file associations across app updates.
1. machine_info.h: zero-initialise Screen struct members
Max_width, Max_height, count, width[] and height[] were bare
int32_t with no initialiser. The comparisons in
init_get_Screen_info() read them before any write, producing
undefined behaviour flagged by Valgrind as 'Conditional jump
or move depends on uninitialised value(s)'.
2. main.cpp: pre-initialise MachineInfo on the main thread
MachineInfo::instance() was first called inside QtConcurrent::run(),
causing its constructor (which calls qApp->screens()) to run on a
background thread. QScreen methods are not thread-safe in Qt5.
Calling instance() once on the main thread before the worker
launches guarantees the singleton is fully built first; subsequent
calls from the worker just return the cached pointer.
3. qetdiagrameditor.h: move m_first_show before the QActionGroup members
C++ initialises members in declaration order. m_first_show was
declared after the QActionGroup members (line 256 vs 168). During
construction of m_row_column_actions_group(this), Qt dispatches a
QObject parent-change event that reaches QETDiagramEditor::event(),
which reads m_first_show before it has been initialised.
Moving the declaration to the top of the first private: block
ensures it is initialised before any member that can trigger events.
All three found via Valgrind --tool=memcheck on Ubuntu 22.04 / Qt 5.15.3.
Relates-to: PR #514 (same QtConcurrent thread-safety pattern).
QETProject schedules an asynchronous crash-recovery backup on construction
(writeBackup() -> QtConcurrent::run(QET::writeToFile, ..., &m_backup_file)).
In one-shot CLI mode the QETProject is destroyed as soon as the command
returns, while that background write still references its m_backup_file
member — an intermittent use-after-free segfault during teardown (~1 in 6
runs; observed on --resave and --set-titleblock).
A crash-recovery backup is meaningless for a short-lived headless command,
so add QETProject::setBackupEnabled(false), called from the CLI entry in
main(). writeBackup() then early-returns, so no background write is ever
launched. Fixes the crash for all CLI commands. See #492.
Implements the long-requested batch/headless export
(bugtracker #171, GitHub #309): render a project's diagrams to files
without opening the GUI.
qelectrotech --export-pdf <project.qet> <output.pdf> one multi-page PDF
qelectrotech --export-png <project.qet> <output_dir> one PNG per diagram
qelectrotech --export-svg <project.qet> <output_dir> one SVG per diagram
main.cpp detects an export request before SingleApplication is created (so the
arguments are not forwarded to a running instance), spins up a plain
QApplication for rendering, and exits with the export's status code.
Rendering reuses Diagram::render() over
BorderTitleBlock::borderAndTitleBlockRect(), the same geometry the GUI
print/export path uses, so output matches the editor. Image files are named
NN_Title.<ext>.
New files: sources/cli_export.{h,cpp}, registered in
cmake/qet_compilation_vars.cmake.
Because on windows MachineInfo take a little time to init, we make it to
a singleton.
MachineInfo is build the first time in main.cpp.
Now all other places where we use MachineInfo (aboutqetdialog and
configdialog) gui don't hang anymore in waiting to MachineInfo finish to
build.
scorpio810