TControl.CreateFloatingDockSite creates a TWinControl owned by the
floating control. This is a questionable relationship, at least, and
incompatible with Delphi, where the floating dock site is owned by
Application.
A floating dock site can have multiple client (child) controls, and must
not be destroyed until all clients are removed or destroyed.
We can agree, however, that a floating dock site for exactly *one*
control is owned by the control, so that TControl.GetFloating can check
the ownership for exactly this unusual relationship. But then a new
floating dock site must be created, as soon as another control is docked
into the site...
All in all we should have better means for dockable controls, since
non-Windows platforms typically don't allow to drag-dock forms. This
does not mean Delphi incompatibilites at the interface level, but the
*implementation* should work on all platforms.
DoDi
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