Trying to be smart by setting m_isEnabled to false in
wxStaticBox::Enable() without actually disabling the box itself (because
it can't be done if its label window is to remain enabled) didn't really
work. For example, it was impossible to TAB to a checkbox label of the
box when it was disabled, because keyboard navigation (correctly)
doesn't recurse into disabled windows and there could be similar
problems with any other code iterating over windows and skipping over
the disabled ones.
So, finally, simplify things and keep m_isEnabled in sync with the real
box state, even if this, counter-intuitively, means that IsEnabled() on
the box returns true after calling Enable(false) on it.
This also reverts 4ee35cf5ee569b6ee6c7d0d5702484d4d2a20f96 ("Don't
disable wxStaticBox children at wx level when disabling it") as we can't
avoid really disabling the children any more now that their parent is
not disabled: without this, their IsEnabled() would return true, i.e.
they wouldn't be disabled at all, from the program point of view. This
is unfortunate for the reasons that originally motivated that commit,
i.e. if some wxStaticBox child is disabled, disabling and re-enabling
the box will now re-enable this child, even if it shouldn't, but seems
impossible to avoid. The only possible alternative is to modify
IsEnabled() to add some wxStaticBox-specific hook to it, e.g. instead of
calling GetParent()->IsEnabled() there, we could call some now
AreChildrenEnable() method, which would delegate to IsEnabled() by
default but overridden in wxStaticBox. However this seems complicated,
and will add an extra virtual function call to all (frequently
happening) IsEnabled() calls.
In some specific scenario, described in the newly added comment in
wxStaticBoxBase::Enable(), the box and its label could remain disabled
after its parent was disabled and re-enabled.
Fix this by continuing to use the derived class version for disabling
the box children, but not when enabling them, as the base class version
already does the right thing in this case.
Calling Enable() on all children from wxStaticBox::Enable() was wrong,
the actual status of the child, returned by wxWindow::IsThisEnabled(),
is not supposed to change just because its parent was disabled.
Call NotifyWindowOnEnableChange() to avoid this, while still disabling
the children visually.
This behaviour might be not completely intuitive, but it makes it much
simpler to handle the box state using a checkbox as the label control
(which is by far the most common case of using box window labels).
Notice that while we could add a separate EnableWithoutLabel() method to
wxStaticBox to make it possible to set the state of the box directly
relatively easily, it wouldn't help with using wxEVT_UPDATE_UI for
managing the box state indirectly as it relies on calling Enable() only.
And this solution does allow wxEVT_UPDATE_UI handlers for the box itself
to work (provided the handler takes care to check for the event object
being the box itself, as otherwise it would still disable the child
checkbox when its wxEVT_UPDATE_UI bubbles up to the box).
Factor out the code from wxStaticBoxSizer dtor into a wxStaticBox method
to improve encapsulation: the static box knows better than another class
how to detach its children from it before destroying it.
No real changes yet.
This keyword is not expanded by Git which means it's not replaced with the
correct revision value in the releases made using git-based scripts and it's
confusing to have lines with unexpanded "$Id$" in the released files. As
expanding them with Git is not that simple (it could be done with git archive
and export-subst attribute) and there are not many benefits in having them in
the first place, just remove all these lines.
If nothing else, this will make an eventual transition to Git simpler.
Closes#14487.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
