A dynamic_cast is necessary when:
- the object to be casted is from an external library because we can't add Qxxx::asXxxx() to Qt e.g.:
* QAbstractListModel to GuiIdListModel,
* QValidator to PathValidator,
* QWidget to TabWorkArea,
* QWidget to GuiWorkArea;
- the object is to be casted from an interface to the implementing class, because the Interface does not know by whom it is implemented:
* ProgressInterface to GuiProgress,
* Application to GuiApplication.
A dynamic_cast can be replaced by:
- already existing as***Inset() functions, e.g.:
* asHullInset(),
* asInsetMath()->asMacro(),
* asInsetText();
- a static_cast when we are sure this can't go wrong, e.g.:
* we are sure that CellData::inset->clone() is an InsetTableCell,
* in cases where we explicitly check it->lyxCode().
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@35855
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