How can I add a state to a control in Silverlight?

Question

I have my own TextBox2 class that derives from TextBox. I want to add a state called TextBlock and I want the VisualStateManager to go to that state when the IsTextBlock property/dependency property is true. When this is true, I want to change the style of the text box to be readonly and look just like a TextBlock but be able to select the text to be copyable. Is this possible? Is there a better way?

Answer 1

Something like that:

[TemplateVisualState(Name = "TextBlock", GroupName = "ControlType")]
[TemplateVisualState(Name = "TextBox", GroupName = "ControlType")]
public class TextBox2 : TextBox
{
 public TextBox2()
 {
  DefaultStyleKey = typeof (TextBox2);
  Loaded += (s, e) => UpdateVisualState(false);
 }


 private bool isTextBlock;
 public bool IsTextBlock
 {
  get { return isTextBlock; }
  set
  {
   isTextBlock = value;
   UpdateVisualState(true);
  }
 }

 public override void OnApplyTemplate()
 {
  base.OnApplyTemplate();
  UpdateVisualState(false);
 }


 internal void UpdateVisualState(bool useTransitions)
 {
  if (IsTextBlock)
  {
   VisualStateManager.GoToState(this, "TextBlock" , useTransitions);
  }
  else
  {
   VisualStateManager.GoToState(this, "TextBox" , useTransitions);
  }
 }
}

HTH