Silverlight TabItem template not working correctly

In a SL4 application i need to restyle my TabItems (actually add a button in the header).

So i took the TabItem's control template from here and added the functionality i wanted.

This seems to work fine, (i could dy开发者_开发技巧namically add tabitems) with one exception: i think this posted control template is behaving somehow "arbitrary": every time the mouse hoovers over a non selected TabItem header, this gets selected WHITHOUT clicking!! (afaik this is not the default behavior: the user user has to click a header to make this tabitem the selected one).

I tried to find why it is behaving like this, with no luck! Is there someone who can enlighten my darkness???

Thanks in advance!

Well it turns out the error was not in the control template but in the class, the style was applied to.

In detail: the class the style was applied to is the following (in it you will see my comment about the "wrong behavior"):

public class WorkspaceViewModel : TabItem {

    public WorkspaceViewModel()
    {
        DefaultStyleKey = typeof(WorkspaceViewModel);
    }
    public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();
        Button closeButtonSel = base.GetTemplateChild("PART_CloseTopSelected") as Button;
        Button closeButtonUnsel = base.GetTemplateChild("PART_CloseTopUnSelected") as Button;
        if (closeButtonSel != null)
            closeButtonSel.Click += new RoutedEventHandler(closeButtonSel_Click);
        if (closeButtonUnsel != null)
            closeButtonUnsel.Click += new RoutedEventHandler(closeButtonSel_Click);

        //this part is causing the effect i was complaining about!
        //and has to be removed
        this.MouseEnter += delegate(object sender, MouseEventArgs e)
        {
            IsSelected = true;
        };


    }

    void closeButtonSel_Click(object sender, RoutedEventArgs e)
    {
        //this is the close request method used in the CloseTabItemCommand
        OnRequestClose();

    }


    #region CloseTabItemCommand

    private RelayCommand closeTabItemCommand;
    public ICommand CloseTabItemCommand
    {
        get
        {
            if (this.closeTabItemCommand == null)
                this.closeTabItemCommand = new RelayCommand(p => this.OnRequestClose(), p => this.CanCloseTabItem());

            return this.closeTabItemCommand;
        }
    }
    private bool CanCloseTabItem()
    {
        return true;
    }

    public event EventHandler RequestClose;
    private void OnRequestClose()
    {
        if (RequestClose != null)
            RequestClose(this, EventArgs.Empty);
    }
    #endregion
}