OnApplyTemplate not called in Custom Control

Question

I have a Custom Control which uses some PART controls:

 [TemplatePart(Name = "PART_TitleTextBox", Type = typeof(TextBox))]
    [TemplatePart(Name = "PART_TitleIndexText", Type = typeof(Label))]
    [TemplatePart(Name = "PART_TimeCodeInText", Type = typeof(TextBlock))]
    [TemplatePart(Name = "PART_TimeCodeOutText", Type = typeof(TextBlock))]
    [TemplatePart(Name = "PART_ApprovedImage", Type = typeof(Image))]
    [TemplatePart(Name = "PART_CommentsImage", Type = typeof(Image))]
    [TemplatePart(Name = "PART_BookmarkedImage", Type = typeof(Image))]
    public class TitleBoxNew : Control
    {

This control is overriding OnApplyTemplate:

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

      InitializeEvents();
}

Which works well, most of the time. I have added the control inside a custom tab control in a window and somehow OnApplyTemplate is never called for that control! Why doesn't this work as I expect?

Answer 1

I can't see your constructor, but don't forget to set the DefaultStyleKey:

DefaultStyleKeyProperty.OverrideMetadata(typeof(TitleBoxNew), new FrameworkPropertyMetadata(typeof(TitleBoxNew)));