Getting a custom Panel in Rhino 6 (Rhino 5 method no longer works)

@PNJeffries wrote:

I’m updating a Rhino 5 plugin to work in Rhino 6. As part of that, I’m using a custom panel in Rhino as a host for some WPF controls. The following code worked for this in Rhino 5:

using RUI = Rhino.UI;
using R = Rhino;

            public void CreateHostDockPanel()
            {
                if (!RUI.Panels.IsPanelVisible(typeof(SideBarUIHost).GUID))
                {
                    if (!RUI.Panels.OpenPanelAsSibling(typeof(SideBarUIHost).GUID, RUI.PanelIds.Layers))
                        RUI.Panels.OpenPanel(typeof(SideBarUIHost).GUID);
                }

                SideBarControl selectPanel = new SideBarControl();
                selectPanel.DataContext = Core.Instance;
                SideBarUIHost host = (SideBarUIHost)RUI.Panels.GetPanel(typeof(SideBarUIHost).GUID);
                host.Host(selectPanel);
            }

In Rhino 6, however, this causes a problem because while it creates the panel OK, trying to retrieve it with the second-to-last line returns null, unless I create the panel, manually click on it to make it topmost and then re-run the code, in which case it retrieves the SideBarUIHost panel successfully.

Looking in the docs, Panels.GetPanel(Guid) is marked as deprecated. Fair enough; there are quite a few overloads which are not so I tried switching to some of them. I’ve tried replacing that line with all of:

SideBarUIHost host = (SideBarUIHost)RUI.Panels.GetPanel(typeof(SideBarUIHost).GUID);

SideBarUIHost host = (SideBarUIHost)RUI.Panels.GetPanel(typeof(SideBarUIHost).GUID, R.RhinoDoc.ActiveDoc);

object[] panels = RUI.Panels.GetPanels(typeof(SideBarUIHost).GUID, R.RhinoDoc.ActiveDoc);
SideBarUIHost host = panels.FirstOrDefault() as SideBarUIHost;

SideBarUIHost host = RUI.Panels.GetPanel<SideBarUIHost>(R.RhinoDoc.ActiveDoc);

These are not marked as obsolete, but they all display the same behaviour, returning null or an empty array unless I first manually give the panel focus.

Is this expected behaviour?

What is the correct way of accessing created custom panels in Rhino 6?

Posts: 1

Participants: 1

Read full topic