[vtkusers] FLTK and vtk questions

[John Shalf]

Hi,
There shouldn't be any restriction with the Fl stuff to keep you from using multiple render
windows (its been done before).  You wouldn't happen to be sharing a renderer with multiple
render windows would you?  You must have completely separate instances of Fl_vtk_windows,
vtkFlWindow, and vtkRenderer if you want to have multiple render windows.

-john

Steve Woolsey wrote:

> A couple of issues in using vtk with FLTK.  I downloaded John Shalf's
> vtkFlWindow stuff, and got things working ok.  Now I have multiple FLTK
> windows, each with a vtk subwindow.  The main window comes up ok, and I
> have a vtk area which renders fine.  When I try to spawn a second
> window, from a menu option in the main window, I get a seg fault when on
> exit from my CrossSection3D::Show function (see below).  It is identical
> to the one I used for the main window, but here it doesn't work. If I
> comment out the vtk stuff, the window comes up fine.  Do I need to do
> something special with this FLTK/VTK stuff to get multiple windows?
> Some of my code follows.  I know that FLTK isn't "officially" supported,
> but am hoping someone out there has run into this problem before.  Any
> help would be greatly appreciated.
>
> Steve
>
> Fl_Menu_Item CrossSection3D::menu_CrossSectionMenuBar[] = {
>  {"Options", 0,  0, 0, 192, 0, 0, 14, 0},
>  {"Close", 0,  0, 0, 0, 0, 0, 14, 0},
>  {0},
>  {0}
> };
> Fl_Menu_Item* CrossSection3D::crossSectionMenuOptions =
> CrossSection3D::menu_CrossSectionMenuBar + 0;
> Fl_Menu_Item* CrossSection3D::MenuOptionClose =
> CrossSection3D::menu_CrossSectionMenuBar + 1;
>
> CrossSection3D::CrossSection3D() {
>   Fl_Window* w;
>   { Fl_Window* o = View3D = new Fl_Window(813, 850, "Lithography v0.5 -
> 3D Cross-Section");
>     w = o;
>     o->user_data((void*)(this));
>     { Fl_Group* o = new Fl_Group(0, 0, 813, 850);
>       { Fl_Menu_Bar* o = CrossSectionMenuBar = new Fl_Menu_Bar(0, 0,
> 800, 25);
>         o->menu(menu_CrossSectionMenuBar);
>       }
>       { Fl_Slider* o = sliderScaleZ = new Fl_Slider(65, 825, 735, 25,
> "Z-Scale");
>         o->type(5);
>         o->align(FL_ALIGN_LEFT);
>       }
>       { renWin2 = vtkFlRenderWindow::New();
>         ren2 = vtkRenderer::New();
>         renWin2->AddRenderer(ren2);
>       }
>       o->end();
>     }
>     o->end();
>   }
> }
>
> void CrossSection3D::Show() {
>   View3D->show();
>   View3D->begin();
>   vtkWin2 = new Fl_vtk_Window(renWin2, 0, 25, 800, 800);
>   vtkWin2->show();
>   View3D->end();
> }  //****Seg faults at the exit of this function.
>
> --
> -------------------------------------------------------------------
> Steven Woolsey                         Engineer/Scientist
> Bechtel BWXT Idaho, LLC                Visualization Engineer
> Idaho National Engineering Lab.        EMAIL: woolsr at inel.gov
> P.O. Box 1625, M.S. 3605
> Idaho Falls, ID  83415-3605
> -------------------------------------------------------------------
>
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