Qt integration issue

Hello everybody! I am trying to compile ParticleEditor2D by aster2013 (https://github.com/aster2013/ParticleEditor2D). This project seems outdated, I didn’t succeeded to compile it with current Urho3D version, all includes are pointing to files in lowest directory, some macros names differ with engine version.
I replaced all wrong stuff (you can check out corrected version at https://github.com/kostik1337/ParticleEditor2D), now the program compiles successfully, but now it crashes right at the start with segfault, gdb prints out this backtrace:


#0 0x00007ffff3f5a190 in XVisualIDFromVisual () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#1 0x0000000000d2e51e in X11_GL_CreateContext ()
#2 0x0000000000abef4c in SDL_GL_CreateContext ()
#3 0x000000000080af91 in Urho3D::Graphics::Restore() ()
#4 0x000000000080ec2d in Urho3D::Graphics::SetMode(int, int, bool, bool, bool, bool, bool, bool, int, int, int) ()
#5 0x00000000006093c9 in Urho3D::Engine::Initialize(Urho3D::HashMap<Urho3D::StringHash, Urho3D::Variant> const&) ()
#6 0x00000000005e7e52 in Urho3D::ParticleEditor::Run() ()
#7 0x00000000005b3d48 in main ()

Removing “ExternalWindow” parameter seems to kind of fixing this crash, but it still crashes with another error.

I run Linux Mint 18.1 with Mesa 11.2.0, tried this on two computers, results are same.
Any suggestions how this can be fixed?

Finally got this working. The problem with external window was that it requires QGLWidget, but QWidget was used.

If someone is interested in fixed version, it’s still here: https://github.com/kostik1337/ParticleEditor2D. There still some issues: sometimes it crashes on open dialog with strange crash, and there are some artifacts on QGLWidget, but I hope i’ll fix them… someday