Apply is not active

Development
1

Hello dear Paraview developers!

I have a filter with both a server side and a custom widget.

Custom widget uses client-server wrappings to call a widget’s function which itself calls python to select some points. Because of that, RequestData is somehow triggered and Apply button is not active.
Dear Mathieu has suggested to call this->Modified from within a filter, and it works, Apply is active again.

However, I also have custom widgets which use client-server wrappings to modify server values

stream << vtkClientServerStream::Commands::Invoke << VTKOBJECT(given_proxy)
    << std::string("SetX") << ...  << vtkClientServerStream::Types::End;

And when setX is actually called on the server, this->Modify() IS called.

But sadly enough, this Modify call does not make Apply button active

Could you please help me get Apply button active again?

Best regards,
Mike

2

Do not talk to the server directly, use a property instead.

3 
<DoubleVectorProperty
	panel_widget="CustomWidget"	
	name="X"
	command="SetX"
	number_of_elements="1"
	default_values="0.0557"
	panel_visibility="advanced"
	label="Einstein X-factor">
</DoubleVectorProperty>

Could you clarify, please, if I write the following XML for my custom widget, what would I get in the constructor in smproxy

CustomWidget::CustomWidget( vtkSMProxy* smproxy, vtkSMProperty* smproperty, QWidget* parentObject)

Is it an object proxy for the filter object, or for the given element?

Is the recommended way to act is to call:
vtkSMPropertyHelper(smproxy, "X").Set(2);

4

Yes

5

If I use this line of code only, nothing happens.

If I add
given_proxy->UpdateVTKObjects();

The value is indeed updated

Apply is not activated, but RequestData and RequestDataObject are called

6

Sorry, I cant help much more witout looking at the code. You can find a working example here:

Examples/Plugins/PropertyWidgets/Plugin

https://gitlab.kitware.com/paraview/paraview/-/tree/master/Examples/Plugins/PropertyWidgets?ref_type=heads