Hidden knob still shows background image

Question

Hi guys,
angle controls seem to have strange behavior when hidden and when the effect is saved as Fx preset, or simply deleted and then re-created by undoing the deletion.
I tried to reproduce it in as simple a way as possible:
- add the following case in the switch of the EntryPointFunc of the example Effect/Paramarama of the SDK:
case PF_Cmd_UPDATE_PARAMS_UI:
                    AEGP_SuiteHandler suites(in_data->pica_basicP);
                    A_Err err = A_Err_NONE, err2 = A_Err_NONE;
                    AEGP_EffectRefH effectH          = NULL;
                    ERR(suites.PFInterfaceSuite1()->AEGP_GetNewEffectForEffect(0, in_data->effect_ref, &effectH));
                    if (effectH)
                              AEGP_StreamRefH streamH          = 0;
                              ERR(suites.StreamSuite2()->AEGP_GetNewEffectStreamByIndex(0, effectH, ANGLE_DISK_ID, &streamH));
                              if (streamH)
                                        ERR(suites.DynamicStreamSuite2()->AEGP_SetDynamicStreamFlag(streamH, AEGP_DynStreamFlag_HIDDEN, FALSE, true));
                                        //Release the handle
                                        ERR2(suites.StreamSuite2()->AEGP_DisposeStream(streamH));
                              ERR2(suites.EffectSuite2()->AEGP_DisposeEffect(effectH));
          break;
- build and apply Paramarama to a solid, the angle control won't be visible:
- then delete the effect
- Undo the operation, I get this:
This only seems to happen in this case or when the effect is saved as Animation Preset.
Am I doing something wrong in the code that hides the control? I wrote this quickly and it's not the actual code I had issues with, but the same issue occurs so that's the most important. I read another thread on the forum wher controls would re-appear in such situations, but the issue was different and related to parameter groups.
Thanks

Answer 1

Hi Shachar, thanks for the answer.
No, I added some breakpoints to check that and I seem to be getting the effectH and streamH properly, and err and err2 remain equal to zero.
But still: you can see that everything gets indeed hidden, except the background image!
Am I doing something very wrong or am I forgetting to ask AE to update the param? I'm having trouble believing nobody ever came across something like that, I guess I must be missing something.
Thanks again,
Kevin
EDIT: I forgot to say that actually when you hit Undo or load an Fx preset it seems that AE displays the plugin the exact way it was saved, and that is before it calls PF_Cmd_UPDATE_PARAMS_UI.
So basically, AE is recreating the instance of the effect as displayed in my second screenshot and the code in my PF_Cmd_UPDATE_PARAMS_UI case has then no effect on the UI.