Eto TabControl in panel not reacting to mouse clicks

Rhino Developer
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1

Hello,

I try to develop a panel for our plugin, which consists of a TabControl with 2 pages. Then I attach the panel to the Right Container. Developed in C# using the Eto Forms, and tested on Windows Rhino 8

Initially the TabControl works fine, but as soon as I click in one of the Rhino viewports, and then go back with the mouse to the panel, the TabControl no longer reacts when I click on the tabs. I can no longer switch between the Left and the Right page.

Any suggestion how to solve this ?

The panel is registered on the plugin OnLoad
Rhino.UI.Panels.RegisterPanel(this, typeof(TestPanel), "Test panel", Assembly, Rhino.UI.PanelType.PerDoc);

For demonstration I reduced to panel to its bare minimum in this code :

using Eto.Forms;
using Rhino.UI;
using Rhino;
[Guid(“91437940-5547-4324-9A55-FE7D0EA5F597”)]
public class TestPanel : TabControl
{
public static System.Guid PanelId
{
get
{
return typeof(TestPanel).GUID;
}
}
public TestPanel(RhinoDoc doc)
{
Pages.Add(new TabPage { Text = “Left”, Content = new Panel() });
Pages.Add(new TabPage { Text = “Right”, Content = new Panel() });
SelectedIndexChanged += this.TabControl_Selected;
}
private void TabControl_Selected(object sender, EventArgs e)
{
RhinoApp.WriteLine(SelectedPage.Text);
}
}