Are these available in the Python API? A quick search shows that in src/mod there is no *.py file that calls these methods.

This is only possible with C++ classes.

With today's build Since which build number or commit do you see the regression? if changes are made to the undocked treeview What kind of changes? (with overlay system active) And if it's not active do you see the regression, too? then an undocked Property view no longer drops behind the current a...

For reading an old project file the class PropertyContainer has two virtual methods handleChangedPropertyName and handleChangedPropertyType that are overridden for all feature classes where a property type or name has changed. To support to write as older version something similar is needed. It's ag...

The problem was that previously, the program only used diffuse colors. Yes and no. The possibility to use emissive, specular and ambient color already exists for 15 years or more (see https://github.com/FreeCAD/FreeCAD/blob/c7985e5c06668ec11f60ed25f05b5d8d732ab7ed/src/Gui/ViewProviderGeometryObject...

As said earlier in this thread the actual problem is caused by changing the default specular color from black to mid gray.

I also disagree to backport this change. The point is that you cannot expect to correctly load a file in an older version that was created with a newer version. Since this is a breaking change it may cause a big mess if some users have an older 0.21 version without that change and some other users a...

Still crashes

Of course because this version is too old. You need a build number >= 33835

The workaround to use Webkit inside BitmapFactory was removed three years ago (git commit 50c7ee36bf5e956). The last remaining piece of code using webkit is in FreeCAD/src/Tools/plugins/imageformats/svg/ but that's not used any more. The whole directory can be removed.

Here a Python example. This will work in C++, too:

The problem has also been discussed here: viewtopic.php?p=754051#p754051