[Paraview] Property Panel and Inheritance?

[Utkarsh Ayachit]

In other words, just don't use mutliple inheritance. Often you can
restruture your code to "has-a" instead of "is-a" style. Make
sphBoxSource subclass vtkCubeSource and have  a member variable of
type SPHParticleProps. For which ever methods from SPHParticleProps
you want to expose, add those as methods on sphBoxSource and then
forward those calls explictly to the SPHParticleProps instance.

Utkarsh

On Thu, Oct 2, 2014 at 11:15 AM, B.W.H. van Beest <bwvb at xs4all.nl> wrote:
> Hi Utkarsh,
>
> Not sure how to do that, really in Paraview. The relationshop and
> dynamics between what is in the xml file, source files I write and
> generated files by mysterious macros make me still a bit uncomfortable
> in finding my way in ParaView.
> Maybe you could a bit more verbose?
>
> Regards,
> Bertwim
>
> On 10/02/2014 03:24 PM, Utkarsh Ayachit wrote:
>> It will only warp the 1 base. I'd suggest using a proxy pattern rather
>> than multiple inheritance.
>>
>> On Thu, Oct 2, 2014 at 9:20 AM, B.W.H. van Beest <bwvb at xs4all.nl> wrote:
>>> It seems to work. Inheritance of the vtkCubeSource methods just works.
>>> Also when I reverse the inheritance order, or when I have single
>>> inheritance (of vtkCubeSource), in the xml-file I can just refer to the
>>> methods of the base class vtkCubeSource (say SetLength()) and it works.
>>> But not so for the oher base class!
>>>
>>> So I *think* I am using the two baseclasses the same way, the effect
>>> however, is asymmetrial.
>>>
>>> I looked, as you suggested,  into sphBoxSourceClientServer.h  The
>>> methods of the baseclasses (vtkCubeSource), e.g. SetXLength(), do not
>>> show-up there either. But it works, so that might not be the place where
>>> to look.
>>>
>>> Any other ideas?
>>>
>>> Regards,
>>> Bertwim
>>>
>>>
>>>
>>> On 10/02/2014 02:23 PM, Utkarsh Ayachit wrote:
>>>> I can't remember if the wrapping code can handle multiple inheritance.
>>>> If you removed the second superclass, does that work?
>>>>
>>>> Also look the sphBoxSourceClientServer.h file generated in your build
>>>> directory. That will indicate which methods from this class are
>>>> getting wrapped and which ones aren't.
>>>>
>>>> Utkarsh
>>>>
>>>> On Thu, Oct 2, 2014 at 6:44 AM, B.W.H. van Beest <bwvb at xs4all.nl> wrote:
>>>>> Hello, I'm struggling with getting the properties panel right for a new
>>>>> Source defined in plugin that I'm writing.
>>>>>
>>>>> In the class below, I'm extending the VTK class for a rectangular box,
>>>>> vtkCubeSource. The class also derives from another class,
>>>>> that has the well known method  "foo".   I have made corresponding
>>>>> changes to the server manager file (xml), given below.
>>>>>
>>>>> In the xml-file, I can specify the panel entries for the vtkCubeSource,
>>>>> referring to the methods of this vtk class which are available via
>>>>> inheritance, for instance "SetXLength(double)". However, when I do the
>>>>> same for the method "foo(int)" of the other base class, ParaView bombs,
>>>>> telling me that:
>>>>>
>>>>> $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
>>>>> tkPVSessionCore (0x113a740): Object type: sphBoxSource, could not find
>>>>> requested method: "foo"
>>>>> or the method was called with incorrect arguments.
>>>>>
>>>>> while processing
>>>>> Message 0 = Invoke
>>>>>   Argument 0 = vtk_object_pointer {sphBoxSource (0x30fbe00)}
>>>>>   Argument 1 = string_value {foo}
>>>>>   Argument 2 = int32_value {1024}
>>>>> $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
>>>>>
>>>>> The problem is gone when I provide the derived class also with a method
>>>>> "foo", which calls the "foo" of the base class.
>>>>> In short, I can refer, in the panel, to the methods of vtkCubeSource (as
>>>>> expected due to inheritance), but not for the other base class.
>>>>> What am I overlooking here, and what do I need to do to have the
>>>>> expected inheritance?
>>>>>
>>>>> Your view
>>>>> Kind Regards,
>>>>> Bertwim
>>>>> ---------------------
>>>>>
>>>>>
>>>>> This is my class:
>>>>> =====================================
>>>>> class sphBoxSource : public vtkCubeSource
>>>>>                                  , public SPHParticleProps
>>>>> {
>>>>> public:
>>>>>   static sphBoxSource* New();
>>>>>    vtkTypeMacro(sphBoxSource,vtkCubeSource);
>>>>>
>>>>> public:
>>>>>    sphBoxSource( double, double, double );
>>>>>    ~sphBoxSource();
>>>>>
>>>>> public:  // testing purposes only
>>>>>    void foo( int i ){ SPHParticleProps::foo(i);}   // For the Properties
>>>>> pane,: Why can I can not just inherit the method "foo"?
>>>>> };
>>>>> =======================================
>>>>>
>>>>> The server manager configuration is taken from "sources.xml" that comes
>>>>> with ParaView (4.2), but extended with a property for "foo".
>>>>>
>>>>> =======================================
>>>>> <ServerManagerConfiguration>
>>>>>    <ProxyGroup name="sources">
>>>>>    <!--
>>>>> ==================================================================== -->
>>>>>    <SourceProxy class="sphBoxSource"
>>>>>                 label="SPHBox"
>>>>>                 name="SPHBoxSource">
>>>>>       ...
>>>>>       <DoubleVectorProperty animateable="1"
>>>>>                             command="SetXLength"
>>>>>                             default_values="10.0"
>>>>>                             name="XLength"
>>>>>                             number_of_elements="1"
>>>>>                             panel_visibility="default">
>>>>>          <DoubleRangeDomain min="0" name="range" />
>>>>>          <Documentation>This property specifies the length of the box in
>>>>> the X direction.</Documentation>
>>>>>       </DoubleVectorProperty>
>>>>>
>>>>>       ....
>>>>>
>>>>>       <!-- Add gui component for testing purposes -->
>>>>>       <IntVectorProperty command="foo"
>>>>>                          default_values="1024"
>>>>>                          name="foobar"
>>>>>                          number_of_elements="1">
>>>>>          <IntRangeDomain min="0" name="range" />
>>>>>          <Documentation>Just for testing. Does nothing.</Documentation>
>>>>>       </IntVectorProperty>
>>>>>
>>>>>       <!-- End Box -->
>>>>>    </SourceProxy>
>>>>>    <!--
>>>>> ==================================================================== -->
>>>>>   </ProxyGroup>
>>>>> </ServerManagerConfiguration>
>>>>>
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>