Want to verify this is the cause of crashes inside the property code,
since if it's not we have a much bigger problem.
This means all listeners are recursive, with a parent-chain walk on each
setValue call, as has been the case since 'forever'.
Get rid of the possibilty to keep delted children. This was not
used actively, required unnecessary memory for each property node
and lead to subtile bugs, as creating a node after a node with
the same path has been deleted resulted in getting the old node
back instead of a cleanly initialized one.
Nodes inside the osg scenegraph now hold a strong reference to
the according canvas element. Canvas elements in turn now only
hold a weak reference to the according node. This simplifies
for example the canvas::Group as it does not need to keep a
list of children on its own anymore. This is now stored inside
the scenegraph (as it was already before).
The restructuring will also allow to use a canvas::Group for
the canvas gui inside FlightGear and share for example the
handling of stacking based on z-index.
- Refactor Canvas from FlightGear and fix lazy rendering with
recursive canvases.
- New classes PropertyBasedElement and PropertyBasedManager for
creating subsystems controlled by the property tree.
- New method parseColor to parse CSS 3 conformant color strings
(only basic color schemes supported)
- New Rect class representing a rectangle.
- Subsystem which manages a list of elements which
are controlled through the property tree.
- Fix a ShivaVG compiler warning.
- Add some helper functions to trigger property removed/add
events for a whole property tree.
Thomas Geymayer