How do I resize a dockbar in Rhino 8

Rhino Developer
, , ,
1

Hi,
I am building a Rhino plugin in CSharp/Dot net.
This plugin creates dockbars similarly to SampleCsDockBar project.
I need my dockbar to be docked to the right, with a specific width.
How can I achieve that?
I am not happy with the solutions to Resize docked panel from code and Automatic Resize Behavior for DockBar in WPF Plugin
I was able to get it docked to the right easily:

      DockBarCreateOptions create_optionsR = new DockBarCreateOptions
      {
        DockLocation = DockBarDockLocation.Right,
        Visible = true,
        DockStyle = DockBarDockStyle.Any,
        FloatPoint = new System.Drawing.Point(100, 100)
      };
      MyDockBar.Create(create_optionsR);

But I cannot set the width. Things I’ve tried after the creating of the DockBar:

MyDockBar.Dock(DockBarDockLocation.Right, new System.Drawing.Rectangle(0, 0, 400, 600));
((WpfHost)MyDockBar.WinFormsContent).ClientSize = new System.Drawing.Size(400, 600);
((WpfHost)MyDockBar.WinFormsContent).Bounds = new System.Drawing.Rectangle(0, 0, 400, 600);
((WpfHost)MyDockBar.WinFormsContent).Width = 500;

Things I’ve tried before the creation of the DockBar:

    public MyDockBar() : base(MyPlugIn.Instance, BarId, "Stage selection")
    {
      WpfHost host = new WpfHost(new MyPluginView(), null);
      host.MinimumSize = new System.Drawing.Size(400, 100);
      SetContentControl(host);
    }

Is there a way to change the width?
I am also open to simulating mouse click-drag-release if that’s the only solution.
This plugin is intended to be used in-house by several users. I am also open to updating user settings/configuration if I can save the dockbar position and size.

2

SystemInfo:

Rhino 8 SR19 2025-5-12 (Rhino 8, 8.19.25132.01001, Git hash:master @ 57e3eb280b0f32cbe59f53a554be5e8ffa66fc36)
License type: Commercial, build 2025-05-12
License details: Stand-Alone

Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 12GB)
.NET 7.0.20

Computer platform: LAPTOP  - Plugged in [48% battery remaining]

Hybrid graphics configuration.
  Primary display: Intel(R) UHD Graphics (Intel) Memory: 1GB, Driver date: 5-19-2020 (M-D-Y).
    > Integrated graphics device with 3 adapter port(s)
        - Windows Main Display is laptop's integrated screen or built-in port
  Primary OpenGL: NVIDIA GeForce GTX 1650 (NVidia) Memory: 4GB, Driver date: 7-5-2020 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 451.67
    > Integrated accelerated graphics device with 1 adapter port(s)
        - Video pass-through to primary display device

OpenGL Settings
  Safe mode: Off
  Use accelerated hardware modes: On
  GPU Tessellation is: On
  Redraw scene when viewports are exposed: On
  Graphics level being used: OpenGL 4.6 (primary GPU's maximum)
  
  Anti-alias mode: 4x
  Mip Map Filtering: Linear
  Anisotropic Filtering Mode: High
  
  Vendor Name: NVIDIA Corporation
  Render version: 4.6
  Shading Language: 4.60 NVIDIA
  Driver Date: 7-5-2020
  Driver Version: 27.21.14.5167
  Maximum Texture size: 32768 x 32768
  Z-Buffer depth: 24 bits
  Maximum Viewport size: 32768 x 32768
  Total Video Memory: 4 GB

Rhino plugins that do not ship with Rhino
  C:\guillaume\bracedesigner\build\Debug\net7.0-windows\OsskinRhinoPlugin.rhp	"OsskinRhinoPlugin"	1.0.0.0

Rhino plugins that ship with Rhino
  C:\Program Files\Rhino 8\Plug-ins\Commands.rhp	"Commands"	8.19.25132.1001
  C:\Program Files\Rhino 8\Plug-ins\rdk.rhp	"Renderer Development Kit"	
  C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp	"Rhino Render"	8.19.25132.1001
  C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp	"RDK_EtoUI"	8.19.25132.1001
  C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp	"Snapshots"	
  C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp	"MeshCommands"	8.19.25132.1001
  C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp	"RhinoCycles"	8.19.25132.1001
  C:\Program Files\Rhino 8\Plug-ins\import_STL.rhp	"STL Import"	
  C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp	"Toolbars"	8.19.25132.1001
  C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp	"3Dconnexion 3D Mouse"	
  C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp	"Displacement"	
  C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp	"SectionTools"
3

You could try using WindowLayouts as this is just internal.