topic Filter Pickfirst Selectionset in .NET Forum

Filter Pickfirst Selectionset

SRSDS — Fri, 03 Jul 2015 03:51:54 GMT

Hi,

I want to use the pickfirst (UsePickSet) selection then filter that selection to make sure I'm only modifying a certain dynamic block.

I have a selection filter set up for the named dynamic block (and use it for the ed.GetSelection method) but I don't know how to apply it to the returned pickfirst selection.

Is this possible?

Re: Filter Pickfirst Selectionset

SRSDS — Sat, 04 Jul 2015 17:47:16 GMT

It was easy enough to step through all the selected elements checking block names and adding them to an Idcollection.

Maybe I Just wondered if there was a more elegant way like the getselection filter.

Re: Filter Pickfirst Selectionset

_gile — Sat, 04 Jul 2015 21:03:38 GMT

Hi,

With CommandFlags.UsePickSet, the selection filter passed to the EditorGetSelection() method is automatically applied to the active selection if any.

You can with try this little snippet both ways: selecting blocks and other entites before or after launching the TEST command.

        [CommandMethod("Test", CommandFlags.UsePickSet)]
        public void Test()
        {
            Document doc = AcAp.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;

            TypedValue[] filter = { new TypedValue(0, "INSERT") };
            PromptSelectionResult psr = ed.GetSelection(new SelectionFilter(filter));
            if (psr.Status != PromptStatus.OK) return;

            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                foreach (SelectedObject obj in psr.Value)
                {
                    BlockReference br = (BlockReference)tr.GetObject(obj.ObjectId, OpenMode.ForWrite);
                    br.Color = Color.FromColorIndex(ColorMethod.ByAci, 30);
                }
                tr.Commit();
            }
        }

Re: Filter Pickfirst Selectionset

SRSDS — Sun, 05 Jul 2015 13:52:14 GMT

That simplifies things.

I was following an example I found which was different and made things slightly more complicated.

http://through-the-interface.typepad.com/through_the_interface/2006/09/using_the_pickf.html

Thankyou