- a typical use-case is to open a document with an existing cut and only this cut is visible. When now opening the section cutting tool, the user got the fault message that there were no visible objects to be cut.
- the transparency for the cut was not explicitly set. Therefore the default transparency for new objects was used instead of the transparency of the objects to be cut.
- workaround for a graphics issue: when cutting objects intersection each other (only then), the transparency setting might be ignored. The fix is simply to change the default color slightly (By the way, this issue is independent on the color that is set in the Part preferences as color for new objects, seems to be a graphics driver or OCC issue.)
- besides this, avoid code duplication by using a lambda function
* QApplication::setFallbackSessionManagementEnabled has been removed
* QString::medRef() has been removed. Use QString::mid() again.
* QTextStream::setCodec has been removed
* Use operator QVariant of the QFont class to make code Qt5 and Qt6 compatible
* Signature of QTreeWidget::mimeData() has changed in Qt6. Remove TreeWidget::mimeData() because it doesn't change the implementation
* QLayout::setMargin() is deprecated in Qt5 and has been removed in Qt6. Use QLayout::setContentsMargins()
* QDateTime::toTime_t() is deprecated in Qt5 and has been removed in Qt6. Use QDateTime::toSecsSinceEpoch()
* QDesktopWidget is deprecated in Qt5 and has been removed in Qt6. Use QScreen
Removes the BUILD_QT5 flag and adds a new FREECAD_QT_VERSION option,
which can be set to either "Auto" (default), 5, or 6. Auto detects which
version of Qt is installed on the system and chooses it. If both version
are installed, Qt5 is used.
Note that this DOES NOT implement compiling against Qt6, it only adds
the necessary cMake infrastructure to begin work on the source code
changes that will be required.
