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Fix the remaining Qt6 compile blockers

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Clears the last five spots that stop master from compiling against Qt6
(all mirrored from the proven qt6-build line):

- qgimanager.h/.cpp: in Qt6 QVector is an alias for QList, so the
  deprecated QList overloads of manage()/release() collide with the
  QVector ones (same signature). Keep them on Qt5 only.
- diagramview.cpp: one unguarded QTextStream::setCodec() call (removed
  in Qt6, which defaults to UTF-8).
- print/projectprintwindow.cpp: QApplication::desktop() was removed in
  Qt6; use QWidget::screen() there, keep the old path on Qt5.
- titleblocktemplate.cpp: QDomDocument::setContent() returns a
  ParseResult in Qt6 whose operator bool is explicit; static_cast keeps
  the bool initialization working on both.

With these, master configures and builds to a running binary with
Qt 6.11 (mingw, BUILD_WITH_KF5=OFF); every change is guarded or
dual-safe, the Qt5 build is unaffected.
This commit is contained in:
Dieter Mayer
2026-07-17 21:01:26 +02:00
parent 5785f57679
commit 12afadd095
5 changed files with 21 additions and 2 deletions
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sources/qgimanager.h
+4
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@@ -45,10 +45,14 @@ class QGIManager {
public:
void manage(QGraphicsItem *);
void release(QGraphicsItem *);
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
// In Qt6 QVector is an alias for QList, so these overloads would collide
// with the QVector ones below (same signature). Keep them on Qt5 only.
QT_DEPRECATED_X("Use QGIManager::manage(const QVector<QGraphicsItem *> &) instead")
void manage(const QList<QGraphicsItem *> &);
QT_DEPRECATED_X("Use QGIManager::release(const QVector<QGraphicsItem *> &) instead")
void release(const QList<QGraphicsItem *> &);
#endif
void manage(const QVector<QGraphicsItem *> &items);
void release(const QVector<QGraphicsItem *> &items);
void setDestroyQGIOnDelete(bool);