As quarter is not wrapped by SWIG we need to expose our own python interface class.
This is a start with the most important functions to access the render and event
manager. Furthermore all extra functions available next to the swig wrapper functions
are exposed. Everything else can be added when needed.
Quarter Widget soes not allow to switch of multisampling on the fly, therefore we need to use glgraphicsitem instead of direct opengl xor rendering for mouse selection
-removes all soqtviewer references
-create a quarter adaptor class which implements missing functionality
-adopts freecad code to make use of SoRenderManager and changed View3DInventorViewer interface
The arrows were there in the code, but at a certain point, code was written to set the this->imgHeight value programatically, based on
whether it had text or not. As symmetry constraint does not have text the variable failed to initialize. Being zero, it did not pass
the ASSERT in the render function, so it was not rendered.
This includes Werner's fix for improver cast of a SoRayPickAction to SoGLRenderAction:
SbVec2s vp_size = static_cast<SoGLRenderAction*>(action)->getViewportRegion().getWindowSize();
to
SbVec2s vp_size = SoViewportRegionElement::get(state).getWindowSize();
At least sometimes tt is a SoRayPickAction because:
When you move with the mouse over the sketcher (when in edit mode) you enter the method ViewProviderSketch::mouseMove.
Inside there the method getPointOnRay is called to get a picked point underneath the cursor. Inside the latter method
an instance of SoRayPickAction is created to traverse the scene graph. After a long cascade of function calls you
finally enter SoDatumLabel::generatePrimitives(SoAction*).
Do not add a symmetry constraint icon to a group of icons, so that it lies on the line or point providing the symmetry (symmetry axis/point),
as it is more clear to the user which line this is.
