add optional arg to SGPropertyNode::addChangeListener that triggers
the listener function call initially. This is useful for cases where
a freshly installed listener wants to treat the current property
value as changed from 'unknown' to the actual value right away.
Examples can be found in the Nasal incarnation setlistener(),
where we have for example this (in $FG_ROOT/Nasal/gui.nas):
INIT = func {
...
setlistener("/sim/rendering/fps-display", fpsDisplay);
if (getprop("/sim/rendering/fps-display")) {
fgcommand("dialog-show", props.Node.new({"dialog-name": "fps"}));
}
}
That is: we first attach a listener that cares for changes to the FPS
display switch, but then we have to manually open the dialog initially.
That's a duplication of code and could be as simple as this
(INIT part only):
INIT = func {
...
setlistener("/sim/rendering/fps-display", fpsDisplay, 1);
}
That is: the optional third arg makes fpsDisplay be called initially,
and then again with every write action. My first solution was in the
Nasal code only, but Andy (rightfully) says that this should rather
be in sg.
Incorporating the shared ptr code:
- All scenegraph references from SimGear
- SGMaterial which already had a reference counter uses now that common
infrastructure.
- SGMatModel is now counted.
- SGSoundSample from SimGear
- And the corresponding change for the sound samples in flightgear which fixes
a latent crash if FGBeacon would evern be deleted.
This patch fixes this SimGear compile error on x86_64 Fedora Development with gcc-4.1:
placement.hxx:49: error: extra qualification ‘SGModelPlacement::’ on member ‘init’
Add the basic infrastructure for a reference counter class.
Adding it now (without using it) enables Mathias and others to
prepare some memory reduction code.
Fix a problem where the directory being created is made relative when in fact
it's absolute. It also tightens things a bit on the Windows side.
Erik:
Make the section that splits up the directory in a lists of parent directories
a standalone function.
The create_dir was totally broken. No function was used at the right place
except mkdir. This patch now create directories without segfaulting.
Erik:
This was my bad, I've been using a really slow computer for the last ten months
and recompiling SimGear with a change to the properties code takes ages, so
once in a while I apply something not entirely tested. This is one really bad
example which shouldn't have happened. Thanks to Frederic for fixing it.
* in some cases more specific sg exception types were used in place
of the more generic one, e.g., sg_io_exception instead of sg_exception
when the context of the error was an IO error
* in some cases, the error message was made more specific
* minor style fix for exception rethrowing --- using throw; whenever
a re-throw is made; sometimes optimizing away the exception symbol name
in the catch handler at all
* more specific catch handlers added in some places -- e.g.,
an sg_io_exception caught ahead of sg_exception
