FSO.IDE.BHAVEditor.PrimGroupChange C# (CSharp) Method

        private void PrimGroupChange(object sender, EventArgs e)
        {
            Button btn = (Button)sender;

            foreach (var cbtn in ButtonGroups)
            {
                var col = ButtonColors[cbtn.Value];
                if (cbtn.Key == btn) cbtn.Key.BackColor = Color.FromArgb((col.R * 128) / 255 + 127, (col.G * 128) / 255 + 127, (col.B * 128) / 255 + 127);
                else cbtn.Key.BackColor = col;
            }

            SelectedGroup = ButtonGroups[btn];

            //set primitive list to reflect the group

            CurrentFullList = new List<InstructionIDNamePair>();

            if (SelectedGroup == PrimitiveGroup.Control || SelectedGroup == PrimitiveGroup.All)
            {
                CurrentFullList.Add(new InstructionIDNamePair("Return True", 254));
                CurrentFullList.Add(new InstructionIDNamePair("Return False", 255));
            }

            if (SelectedGroup == PrimitiveGroup.All)
            {
                for (ushort id = 0; id < 68; id++)
                {
                    var primName = EditorScope.Behaviour.Get<STR>(139).GetString(id);
                    CurrentFullList.Add(new InstructionIDNamePair((primName == null) ? "Primitive #" + id : primName, id));
                }
            }

            if (SelectedGroup == PrimitiveGroup.Subroutine || SelectedGroup == PrimitiveGroup.All)
            {
                if (bhav.ChunkID > 4095)
                {
                    if (bhav.ChunkID < 8192) CurrentFullList.AddRange(Scope.GetAllSubroutines(ScopeSource.Private));
                    CurrentFullList.AddRange(Scope.GetAllSubroutines(ScopeSource.SemiGlobal));
                }
                CurrentFullList.AddRange(Scope.GetAllSubroutines(ScopeSource.Global));
            }
            else
            {
                var prims = PrimitiveRegistry.PrimitiveGroups[SelectedGroup];
                foreach (var id in prims)
                {
                    var primName = EditorScope.Behaviour.Get<STR>(139).GetString(id);
                    CurrentFullList.Add(new InstructionIDNamePair((primName == null) ? "Primitive #" + id : primName, id));
                }
            }

            SearchBox.Text = "";
            UpdatePrimitiveList();
        }