[Paraview-developers] load State slow by remembering the states checked/ unchecked

[RIVERA ROLDAN, Jorge Orlando]

Dear  Forum members

I hope you can help me  with something I am dealing with .

I have a reader base on a  vtkMultiBlock , the  data layout of the multiblock will be represented by a  qtree on the client/GUI   , so the Data layout will be one to one to the qtree widget
like   this:
- vtkMB             (0)
- - vtkMB           (1)
- - - vtkMB         (2)
- - - -  grid         (3)
- - - -  grid         (4)
- - - vtkMB         (5)
- - - -  grid         (6
- - - -  grid         (7) …

There is a vtkSMIntVectorProperty (A) that connects  the   Qtree(GUI) with the Server . The corresponding intArray (B) on the server side   follows simply  the indexes  on the MB tree {0,1,2,3,4,5,6,7…} so at server and GUI both arrays (A)-(B) mirror each other.

So when I   select an element on the qtree widget ,  lets say (3)  (A[3]=1) .  Then at the server B[3]=1 and the grid  3 will be read and loaded .  When I select in the qtree (2) , then  A[2]=1  , that means  also, A[3]=1 and A[4]=1 , ( 3 and 4 being children  of  2) are to be read and loaded  i.e. B[2]=1, B[3]=1 and B[4]=1.

In normal operation all woks like a charm.  However, when I save the state following  behavior can be observer . In the state-xml file  the pipeline is saved  normally , so the state of intArray is saved (vector B)   ,  the data is read and loaded  in requesData  and  I have my representation as supposed to be.

The Data Layout  will be them  transferred to the GUI  with a vtkSMStringVectorProperty  and the state of checked and unchecked with the vtkSMIntVectorProperty vector (A) , so far so good.  Now , when I  check  and /or uncheck other elements on the Qtree/GUI  the response time is quite lame.  With the debugger I could   see  that the time is used in A->SetValue(index, 1)   (1 for checked and 0 for unchecked ) .     Since a have a couple or thousand  of elements in my tree (Qtree),  this takes several minutes, but  **ONLY when LOAD  STATE is used **  .

The function in the GUI  that  contains   A->SetValue(index, CHECKED/UNCHECKED )   works really fast when I load my example normally (open File , apply plugins and filters ).  The same Function  is very slow  ( A->SetValue(index, CHECKED/UNCHECKED )  )  when  loaded from  a SAVE and LOAD state.

What could be the cause ?  do you have any Idea or have observed similar behavior?

Thanks in Advance


Orlando Rivera





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