How to Stretch WPF Tab Item Headers to Parent Control Width

Question

Is there a way in XAML to cause the tab item headers to stretch across the width of the tab control?

For example, I have three tabs: red, blue and green. If I have a

Answer 1

I followed Charlie's suggestion and went on re-templating route. Here is a simple implementation of TabControl that divides available space equally among its TabItems, using UniformGrid:

Control's XAML

Control's Code-Behind

using System.Windows.Controls;
using System.Windows.Controls.Primitives;

namespace YourNamespace.Views
{
  /// 

  /// A TabControl with large tabs. 
  /// 
  public partial class BigTabsTabControl : TabControl
  {
    public BigTabsTabControl()
    {
      InitializeComponent();
    }

    public override void OnApplyTemplate()
    {
      base.OnApplyTemplate();

      if (this.Template != null)
      {
        UniformGrid X = this.Template.FindName("headerPanel", this) as UniformGrid;
        if (X != null) X.Columns = this.Items.Count;
      }
    }
  }
}

That's it. You can now add TabItems to this control and they'll adjust their width automatically. No need to specify Grid.Column for these TabItems either, they work fine without it, even at design time.