This is a combination of running clang-tidy with modernize-use-nullptr
check for some ports (GTK, X11, OSX) and manual changes to the ports for
which it couldn't be used easily (MSW, DFB) and also manually updating
the docs.
Also replace NULL with null or nullptr in the comments as this is more
consistent with the use of nullptr in the code and makes it simpler to
grep for the remaining occurrences of NULL itself.
And also use null in the assert messages.
Only a few occurrences of "NULL" are still left in non-C files, mostly
corresponding to unclear comments or string output which it might not be
safe to change.
Not all widgets are controls and we don't use any of wxControl-specific
methods in the sample, so don't require RecreateWidget() to return a wxControl
when a simple wxWindow suffices.
No real changes.
This fixes the sample compilation with default configuration when using MinGW
as it uses wxUSE_GRAPHICS_CONTEXT=0 by default and so wxUSE_ACTIVITYINDICATOR
is turned off by default for it too.
This is a simple animated control indicating some program activity.
Provide native GTK+ (for > 2.20) and OS X implementations as well as a generic
one used under MSW.
Update the sample and the documentation.
Vadim Zeitlin
PB
Blake Eryx