QPdfDocument::pagePointSize() (used for PDF page import) requires
Qt >= 6.4, and the QtPdf module itself is missing entirely on some
Qt6 distributions (e.g. the Flatpak org.kde.Platform runtime), since
it ships from the qtwebengine source tree rather than Qt6 core.
CMake: probe Pdf with find_package(... QUIET) instead of REQUIRED,
mirroring the existing GuiPrivate pattern. Define QET_HAS_QTPDF
only when the module is found AND Qt >= 6.4.
Replace the ad-hoc QT_VERSION_CHECK(6, 0, 0) / (6, 4, 0) guards in
qetdiagrameditor.cpp, diagrameventaddpdf.{h,cpp} and
pdfpagesdialog.{h,cpp} with #ifdef QET_HAS_QTPDF, so version and
module-availability checks live in one place.
Fixes the Flatpak build (missing Qt6Pdf) and the Windows/Debian CI
failures (QPdfDocument::pagePointSize undeclared on Qt < 6.4). The
PDF import toolbar action is now silently unavailable wherever
QtPdf isn't usable, instead of breaking the whole build.
- Add DPI selection (150/300/600) to the page selection dialog
- Add live page preview in the selection dialog
- Conditionally compile PDF import only for Qt6 (#if QT_VERSION)
- Add custom pdf-import icon (PDF document with + symbol)
- Register new icon in qelectrotech.qrc
- Qt5 builds: PDF import action is hidden, everything else works as before
plc-user