[Paraview] How to pass array from Server to Client with as 'Information Helper"

[Michael Jackson]

THANKS! that worked great. One last item - where would I look for an  
example of have a custom widget (QListWidget) that is NOT getting  
registered with the proxy mananger, so that when something changes,  
like the selection, the "Accept" button gets "lighted up". I am trying  
to work through the pqContourWidget but not sure if that is the best  
place to start.
___________________________________________________________
Mike Jackson                      www.bluequartz.net
Principal Software Engineer       mike.jackson at bluequartz.net
BlueQuartz Software               Dayton, Ohio


On Mar 26, 2010, at 4:40 PM, Utkarsh Ayachit wrote:

> Try returning a vtkIntArray from your reader instead and use
> <IntArrayInformationHelper /> as the information helper. (Look at it's
> use in readers.xml).
>
> Utkarsh
>
> On Fri, Mar 26, 2010 at 4:36 PM, Michael Jackson
> <mike.jackson at bluequartz.net> wrote:
>> The problem is down in a generated file on the server side.
>>
>>  if (!strcmp("GetNeighborList",method) &&  
>> msg.GetNumberOfArguments(0) == 3)
>>    {
>>    vtkClientServerStreamDataArg<int    > temp0(msg, 0, 2);
>>    if(temp0)
>>      {
>>      op->GetNeighborList(temp0);
>>      return 1;
>>      }
>>    }
>>
>> The problem is that msg.GetNumberOfArguments(0) returns 2 and NOT  
>> 3. I have
>> no idea of the internals of the msg object to try and figure out  
>> what is
>> trying to be passed. Is the client sending in a index also? 2  
>> pointers? no
>> idea.
>>
>> I'll just assume from this that it is basically impossible to pass  
>> an array
>> from the server to the Client in an "Information Only" fashion. I  
>> guess I
>> can encode the values to a string and send that. Seems odd to have  
>> to encode
>> the data into a string...
>>
>> If anyone else has a better Idea I would much appreciate it.
>> ___________________________________________________________
>> Mike Jackson                      www.bluequartz.net
>> Principal Software Engineer       mike.jackson at bluequartz.net
>> BlueQuartz Software               Dayton, Ohio
>>
>>
>> On Mar 26, 2010, at 3:23 PM, Michael Jackson wrote:
>>
>>> I have a custom reader. Part of the reader is getting a  
>>> "NeighborList"
>>> which is an vtkIntArray object although I have declared the  
>>> following
>>> methods in my "reader" class:
>>>
>>>  int* GetNeighborList();
>>>  void GetNeighborList(int* list);
>>>  vtkIdType GetNumberOfNeighbors();
>>>
>>> And in my ServerManagerXML file I have the following:
>>>     <IntVectorProperty name="NeighborList"
>>>       command="GetNeighborList"
>>>       argument_is_array="1"
>>>       number_of_elements="0"
>>>       repeat_command="0"
>>>       number_of_elements_per_command="1"
>>>       use_index="0" >
>>>       <SimpleIntInformationHelper />
>>>       <Documentation>
>>>           This property lists the neighbors of the grain
>>>         </Documentation>
>>>       </IntVectorProperty>
>>>
>>> On the Client side I have the following bit of code to populate a
>>> QListWidget:
>>>
>>> void pqH5TiDataReaderPanel::updateNeighborList(QListWidget*  
>>> qListWidget,
>>> QString property)
>>> {
>>>  vtkSMProperty* smProperty =
>>> this->proxy()->GetProperty(property.toAscii());
>>>  if (NULL == smProperty)
>>>  {
>>>   std::string msg = "SMProperty [int] was NULL for ";
>>>   msg.append(property.toAscii() );
>>>   DebugTrace(<< msg.c_str() );
>>>   return;
>>>  }
>>>  vtkSMIntVectorProperty* intProperty
>>>                   =  
>>> vtkSMIntVectorProperty::SafeDownCast(smProperty);
>>>  if (NULL == intProperty)
>>>  {
>>>   std::string msg = "Could not SafeDownCase to  
>>> vtkSMIntVectorProperty for
>>> property ";
>>>   msg.append(property.toAscii() );
>>>   DebugTrace(<< msg.c_str() );
>>>   return;
>>>  }
>>>  //intProperty->GetArgumentIsArray();
>>>  int* elements = intProperty->GetElements();
>>>  int nElements = intProperty->GetNumberOfElements(); //<== ALWAYS 0
>>>  qListWidget->clear();  // Remove all the content
>>>
>>>  for (int i = 0; i < nElements; ++i)
>>>  {
>>>   qListWidget->addItem(QString::number(elements[i])); //<====  
>>> NEVER GETS
>>> HERE
>>>  }
>>> }
>>>
>>> So, what am I doing wrong? I have tried reading through the relevant
>>> sections of the "ParaView Guide" but nothing is really jumping  
>>> out. Also
>>> went looking for examples somewhere in the ParaView source code  
>>> but came up
>>> empty. The ContourWidget is close but it "sends" its array, it never
>>> receives one from the server.
>>>
>>> Any pointers would be great and much appreciated.
>>> ___________________________________________________________
>>> Mike Jackson                      www.bluequartz.net
>>> Principal Software Engineer       mike.jackson at bluequartz.net
>>> BlueQuartz Software               Dayton, Ohio
>>>
>>>
>>
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