private void ChangeFocus(UIElement focus, DateTime timestamp)
{
if (focus != this._focus)
{
// Update the critical pieces of data.
var oldFocus = this._focus;
this._focus = focus;
this._focusRootUIElement = focus?.RootUIElement;
// Adjust the handlers we use to track everything.
if (oldFocus != null)
{
oldFocus.IsEnabledChanged -= this._isEnabledOrVisibleChangedEventHandler;
oldFocus.IsVisibleChanged -= this._isEnabledOrVisibleChangedEventHandler;
}
if (focus != null)
{
focus.IsEnabledChanged += this._isEnabledOrVisibleChangedEventHandler;
focus.IsVisibleChanged += this._isEnabledOrVisibleChangedEventHandler;
}
// Send the LostFocus and GotFocus events.
if (oldFocus != null)
{
var lostFocus = new FocusChangedEventArgs(this, timestamp, oldFocus, focus)
{
RoutedEvent = Buttons.LostFocusEvent,
Source = oldFocus
};
this._inputManager.ProcessInput(lostFocus);
}
if (focus != null)
{
var gotFocus = new FocusChangedEventArgs(this, timestamp, oldFocus, focus)
{
RoutedEvent = Buttons.GotFocusEvent,
Source = focus
};
this._inputManager.ProcessInput(gotFocus);
}
}
}
private void ChangeFocus(UIElement focus, DateTime timestamp)
{
if (focus == this._focus)
{
return;
}
UIElement focus1 = this._focus;
this._focus = focus;
this._focusRootUIElement = focus?.RootUIElement;
if (focus1 != null)
{
focus1.IsEnabledChanged -= this._isEnabledOrVisibleChangedEventHandler;
focus1.IsVisibleChanged -= this._isEnabledOrVisibleChangedEventHandler;
}
if (focus != null)
{
focus.IsEnabledChanged += this._isEnabledOrVisibleChangedEventHandler;
focus.IsVisibleChanged += this._isEnabledOrVisibleChangedEventHandler;
}
if (focus1 != null)
{
FocusChangedEventArgs changedEventArgs = new FocusChangedEventArgs(this, timestamp, focus1, focus);
changedEventArgs.RoutedEvent = Buttons.LostFocusEvent;
changedEventArgs.Source = (object)focus1;
this._inputManager.ProcessInput((InputEventArgs)changedEventArgs);
}
if (focus == null)
{
return;
}
FocusChangedEventArgs changedEventArgs1 = new FocusChangedEventArgs(this, timestamp, focus1, focus);
changedEventArgs1.RoutedEvent = Buttons.GotFocusEvent;
changedEventArgs1.Source = (object)focus;
this._inputManager.ProcessInput((InputEventArgs)changedEventArgs1);
}
