Refresh Issue in my Effect Plugin

Question

Hi,
I'm writing a small effect plugin, where i have one or two color pickers in the UI.
The layer i'm applying the effect will be PreComp (with 2 layers inside). So whenever i change the color in my effect, that color should be updated to the Fill Effect of corresponding layers inside PreComp if they have any.
What i mean is if i change the color value in first color picker, it has to change the fill effect color for first layer inside that PreComp. And same goes with second.
I know its bit confusing.
Now my problem is color doesn't update properly. Sometimes it works and sometimes it doesn't.
I tried sending PF_OutFlag_REFRESH_UI, but it doesn't work. May be this will refresh only current Comp.
Thanks and Regards,
Suma

Answer 1

Yes i'm using param supervision. When it comes to PF_Cmd_USER_CHANGED_PARAM i do the following. I know i have to update only param which is changed, but currently i update all layer's fill effects when it comes to my func
This is what i'm doing.
    AEGP_GlobalRefcon globalRef=NULL;
    const A_char* pluginName = "Convolutrix";
    AEGP_PluginID pluginID;
    suites.UtilitySuite5()->AEGP_RegisterWithAEGP( globalRef, pluginName, &pluginID );
    AEGP_LayerH activeLay = NULL;
    suites.LayerSuite5()->AEGP_GetActiveLayer(&activeLay);
    AEGP_ItemH item = NULL;
    suites.LayerSuite5()->AEGP_GetLayerSourceItem(activeLay, &item);
    AEGP_ItemType type;
    suites.ItemSuite7()->AEGP_GetItemType(item, &type);
    if(type == AEGP_ItemType_COMP)
        AEGP_CompH preComp;
        A_Err err = suites.CompSuite6()->AEGP_GetCompFromItem(item, &preComp);
        if(err == noErr)
            A_long numOfLay;
            suites.LayerSuite5()->AEGP_GetCompNumLayers(preComp, &numOfLay);
            for(A_long i = 0; i < numOfLay; i++)
                AEGP_LayerH lay;
                suites.LayerSuite5()->AEGP_GetCompLayerByIndex(preComp, i, &lay);
                A_long numOfEff;
                suites.EffectSuite3()->AEGP_GetLayerNumEffects(lay, &numOfEff);
                for(A_long j = 0; j < numOfEff; j++)
                    AEGP_EffectRefH eff;
                    suites.EffectSuite3()->AEGP_GetLayerEffectByIndex(pluginID, lay, j, &eff);
                    AEGP_InstalledEffectKey key;
                    suites.EffectSuite3()->AEGP_GetInstalledKeyFromLayerEffect(eff, &key);
                    char *name = new char();
                    suites.EffectSuite3()->AEGP_GetEffectMatchName(key, name);
                    if(strcmp(name, (const char *)("ADBE Fill")) == 0)
                        AEGP_StreamRefH streamRef;
                        suites.StreamSuite3()->AEGP_GetNewEffectStreamByIndex(pluginID, eff, 3, &streamRef);
                        AEGP_StreamType type;
                        suites.StreamSuite3()->AEGP_GetStreamType(streamRef, &type);
                        AEGP_StreamValue2 val;
                        A_Time tim;
                        tim.value = in_data->current_time;
                        tim.scale = in_data->time_scale;
                        suites.StreamSuite3()->AEGP_GetNewStreamValue(pluginID, streamRef, AEGP_LTimeMode_CompTime,
                                                                      &tim,
                                                                      true, &val);
                        val.val.color.alphaF = params[i + 1]->u.cd.value.alpha;
                        val.val.color.redF = params[i + 1]->u.cd.value.red;
                        val.val.color.greenF = params[i + 1]->u.cd.value.green;
                        val.val.color.blueF = params[i + 1]->u.cd.value.blue;
                        suites.StreamSuite3()->AEGP_SetStreamValue(pluginID, streamRef, &val);