How to show value in preview pane only for selected viewFilter

Hi, guys!

Today I want to show you, how you can set value for Preview Pane - Form Part special values or how you can get it visible and empty if you need this.
Here is code example for how make preview pane visible\hide:

void previewPaneVisible(boolean _show)
{
    FormRun         part;
    PartList        partList;
    ;
    partList = new PartList(Element);
    if (_show ^ (partList.partCount() > 0))
    {
       element.task(4478));
    }
}

And here's solution for  make preview pane empty on some cases:

void showPreviewRecords(boolean _show)
{
    int idx;
    Object part;
    PartList partList;
    partList = new PartList(element);
    for(idx = 1; idx<= partList.partCount(); idx++)
    {
        part = partList.getPartById(idx);
       if((part is FormRun) && (part.name() == identifieStr(yourListPageForm)))
       {
            part.ParmShowEmptyGrid(!_show);
       }
   }
}

If you have any questions  - please, comment or send me e-mail.

Thanks!