[vtkusers] [vtk-developers] Instructions to implement 3D Space Navigator support with VTK

[Goodwin Lawlor]

Hi Wagner,

Try putting your code into the vtkXRenderWindowInteractorCallback method 
in the vtkXRenderWindowInteractor class. There's a ClientMessage case at 
the bottom of the switch.

hth

Goodwin

Wagner Sales wrote:
> Hi all,
>
> I need to implement 3DConnexion Space Navigator support in my VTK 
> application. To know a little bit more, this device are used to 
> control 3D navigation in a scheme, like rotation, zooming, move and 
> others.
> I read an old post in the list, but no answers are returned. I was 
> read the VTK interactor and relative classes (interactorStyle, 
> vtkXRenderWindowInteractor ) to try to understand how to implement 
> this, but without success.
> Since I'm using X11, this device will send to me a ClientMessage 
> XEvent type, with the data about move position or button click. I'm 
> current handling this in Qt, without problems ( the code are at the 
> end to illustrate better what's I need to do). Now, I need to do in 
> VTK, but I'm a little bit confused about wich class(es) I need to re 
> implement or inherits to give this support. vtkRenderWindowInteractor? 
> vtkInteractorStyle? Or something completely new?
> I know this classes are changing from VTK 5.0 to 5.2, and I'm using 
> VTK 5.0.4.
>
> Can someone helps and put me in the correct way?
>
> Thks in advance!
>
>
> Wagner Sales
>
>
> The Qt code to handle the event:
> bool QtSpaceNavigatorWidget:
> :x11Event(XEvent *event)
> {
>     MagellanFloatEvent MagellanEvent;
>     double MagellanSensitivity = 1.0;
>     Display *display = QX11Info::display();
>     {
>         if(!display)
>         {
>             qDebug() << "Cannot open display!" << endl;
>         }
>     }
>     if ( !MagellanInit( display, winId() ) )
>       {
>            qDebug() << "No Space Navigator driver exists";
>            return false;
>       };
>
>    switch (event->type)
>    {
>     case ClientMessage:
>           switch( MagellanTranslateEvent( display, event, 
> &MagellanEvent, 1.0, 1.0 ) )
>            {
>             case MagellanInputMotionEvent :
>                  MagellanRemoveMotionEvents( display );
>             // now we will be set the values from Space Navigator on 
> the text labels
>             
> xvalue->setText(QString::number(MagellanEvent.MagellanData[ MagellanX ]));
>             
> yvalue->setText(QString::number(MagellanEvent.MagellanData[ MagellanY ]));
>             
> zvalue->setText(QString::number(MagellanEvent.MagellanData[ MagellanZ ]));
>             
> avalue->setText(QString::number(MagellanEvent.MagellanData[ MagellanA ]));
>             
> bvalue->setText(QString::number(MagellanEvent.MagellanData[ MagellanB ]));
>             
> cvalue->setText(QString::number(MagellanEvent.MagellanData[ MagellanC ]));
>             return false;
>    
>             break;
>    
>             case MagellanInputButtonPressEvent :
>                  qDebug() << "MagellanInputButtonPressEvent called" << 
> endl;
>
>                  switch ( MagellanEvent.MagellanButton )
>                   {
>                        case 5: MagellanApplicationSensitivity( 
> display, MagellanSensitivity / 2.0 ); break;
>                        case 6: MagellanApplicationSensitivity( 
> display, MagellanSensitivity * 2.0 ); break;
>                        case 7: MagellanApplicationSensitivity( 
> display, 1.0 ); break;
>                   };
>
>                  switch( MagellanEvent.MagellanButton )
>                   {
>                        case 5: MagellanSensitivity = 
> MagellanSensitivity <= 1.0/32.0 ? 1.0/32.0 : MagellanSensitivity/2.0; 
> break;
>                        case 6: MagellanSensitivity = 
> MagellanSensitivity >= 32.0 ? 32.0 : MagellanSensitivity*2.0; break;
>                        case 7: MagellanSensitivity = 1.0;  break;
>                   };  
>             switch( MagellanEvent.MagellanButton )
>                   {
>                        case 5:
>                        case 6:
>                        case 7:
>                            printf("Application Sensitivity = %lf \n", 
> MagellanSensitivity );
>                        break;
>                   };
>         return false;
>             break;
>
>             case MagellanInputButtonReleaseEvent :
>                  qDebug() << "MagellanInputButtonPressEvent called" << 
> endl;
>         return false;
>              break;
>     }
>     default:
>     return false;
>     break;
>     }
>     return false;
>
> }
> ------------------------------------------------------------------------
>
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