[Paraview-developers] Undo/Redo stack not getting updated

[Pandu tech]

Hi,

In 3D view, undo/redo actions are working properly. But when a ZOOM BOX is
applied and then undo is done, it is not reverting to latest change.

I observed that onUndoStackChanged() SLOT of pqRenderView.cxx is not
getting invoked whenever a zoom box is applied.

In all other cases like Mouse movement, ResetCamera this SLOT is getting
invoked and accordingly Undo/Redo stack size is incremented.

When zoom box is applied, we need to emit a signal/event so that stack gets
updated and increments its count.

Please suggest your ideas to fix this.

Thanks for your help.

//-----------------------------------------------------------------------------
void pqRenderView::InternalConstructor(vtkSMViewProxy* renModule)
{
  this->Internal = new pqRenderView::pqInternal();

  // we need to fire signals when undo stack changes.
  this->getConnector()->Connect(this->Internal->InteractionUndoStack,
    vtkCommand::ModifiedEvent, this, SLOT(onUndoStackChanged()),     * //
SIGNAL SLOT connection made for InteractionUndoStack*
    0, 0, Qt::QueuedConnection);

  this->ResetCenterWithCamera = true;
  this->UseMultipleRepresentationSelection = false;
  this->getConnector()->Connect(
    renModule, vtkCommand::ResetCameraEvent,
    this, SLOT(onResetCameraEvent()));
}


//-----------------------------------------------------------------------------
void pqRenderView::onUndoStackChanged()
{
  bool can_undo = this->Internal->InteractionUndoStack->CanUndo();
  bool can_redo = this->Internal->InteractionUndoStack->CanRedo();

  emit this->canUndoChanged(can_undo);
  emit this->canRedoChanged(can_redo);
}


Regards,
Pandu
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