private void Popup_Opened(object sender, EventArgs e)
{
// Set the focus on the content of the ContentPresenter.
if (_contentPresenter != null)
{
_contentPresenter.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
}
} // func LoadAsync
private void UpdateFocus(bool setLogical)
{
if (setLogical) // activate the element within the parent focus scope
{
FocusManager.SetFocusedElement(FocusManager.GetFocusScope(this), this);
}
// if the element is focused
if (controlPresenter != null && IsFocused && !controlPresenter.IsKeyboardFocusWithin)
{
var moveKeyboard = FocusManager.GetFocusedElement(controlPresenter);
if (moveKeyboard == null)
{
controlPresenter?.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
else
{
Keyboard.Focus(moveKeyboard);
}
}
} // proc UpdateFocus
/// <summary>
/// Moves the keyboard focus to the content of the currently selected
/// <see cref="DockTabItem"/>.
/// </summary>
/// <returns>
/// <see langword="true"/> if the focus was set to the selected content; otherwise,
/// <see langword="false"/>.
/// </returns>
internal bool FocusSelectedContent()
{
// IMPORTANT: Calling UpdateLayout() when the window is in the process of being closed,
// may cause a FatalExecutionEngineError. Always check the IsVisible flag!
if (_contentPresenter == null || !IsVisible)
{
return(false);
}
// Make sure content is set.
UpdateLayout();
// Try to move focus to content. (Does not always work.)
bool focusMoved = false;
if (!_contentPresenter.IsKeyboardFocusWithin)
{
focusMoved = _contentPresenter.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
}
return(focusMoved);
}
/// <summary>
/// Moves the logical focus and keyboard focus to the content of the <see cref="AutoHidePane"/>.
/// </summary>
/// <returns>
/// <see langword="true"/> if logical focus and keyboard focus was moved to the content;
/// otherwise <see langword="false"/>.
/// </returns>
public bool FocusContent()
{
if (!IsLoaded)
{
Loaded += DeferredFocusContent;
_isFocusDeferred = true;
return(false);
}
bool hasFocusMoved = false;
var dockTabPane = _contentPresenter.GetContentContainer <DockTabPane>();
if (dockTabPane != null)
{
hasFocusMoved = dockTabPane.FocusSelectedContent();
}
else if (_contentPresenter != null)
{
hasFocusMoved = _contentPresenter.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
return(hasFocusMoved);
}
private void Popup_Opened(object sender, EventArgs e)
{
_contentPresenter?.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}