[vtkusers] updating a vtkMapper

[Steffen Oeltze]

Dear VTK-users,

I have implemented a slice viewer together with a keyboard event-handler.
When the user presses 'd' I want the slice to make a 90°-turn. This works fine 
but only once. When I press 'd' the second time I have to change the slice to 
see the result. I probably forget some ->update() or ->modified() calls.
I there anybody who would have a look at my code and help me ?

void my2DvtkInteractorStyle::OnChar(int ctrl, int shift, 
                                char keycode, int vtkNotUsed(repeatcount)) 
{
  this->CtrlKey  = ctrl;
  this->ShiftKey = shift;
  
  vtkRenderWindowInteractor *rwi = this->Interactor;
  switch (keycode) 
    {
    
    case 'd' :
    case 'D' :
      ResultMatrix->Multiply4x4(ResultMatrix, RotMatrix, ResultMatrix);

	  sliceViewer->get_imgReslice()->SetResliceAxes(ResultMatrix);
	  sliceViewer->get_imgReslice()->Update();
	  sliceViewer->get_imgMapper()->RemoveAllInputs();
	  sliceViewer->get_imgMapper()->SetInput(sliceViewer->get_imgReslice()-
>GetOutput());
	  sliceViewer->get_imgMapper()->Modified();
	  sliceViewer->get_imgActor()->Modified();
	  sliceViewer->get_imgRenderer()->Modified();
	  sliceViewer->get_imgRenderer()->Render();
	  
	  sliceViewer->get_imgWindow()->Render();
	  sliceViewer->get_imgMapper()->SetZSlice(sliceViewer->get_imgMapper()-
>GetZSlice()+1);

      rwi->Render();
    break;