private void OnLeavePanel(DetachFromPanelEvent evt)
{
SearchTextField.Q("unity-text-input").UnregisterCallback <FocusEvent>(OnSearchTextFieldFocus);
SearchTextField.Q("unity-text-input").UnregisterCallback <FocusOutEvent>(OnSearchTextFieldFocusOut);
SearchTextField.UnregisterCallback <ChangeEvent <string> >(OnSearchTextFieldChange);
SearchTextField.Q("unity-text-input").UnregisterCallback <KeyDownEvent>(OnKeyDownShortcut);
}
private void OnEnterPanel(AttachToPanelEvent evt)
{
SearchTextField.Q("unity-text-input").RegisterCallback <FocusEvent>(OnSearchTextFieldFocus);
SearchTextField.Q("unity-text-input").RegisterCallback <FocusOutEvent>(OnSearchTextFieldFocusOut);
SearchTextField.RegisterCallback <ChangeEvent <string> >(OnSearchTextFieldChange);
SearchTextField.Q("unity-text-input").RegisterCallback <KeyDownEvent>(OnKeyDownShortcut);
}