/// <summary>
/// Handles the <see cref="WUX.Hosting.DesktopWindowXamlSource.TakeFocusRequested" /> event.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="WUX.Hosting.DesktopWindowXamlSourceTakeFocusRequestedEventArgs"/> instance containing the event data.</param>
private void OnTakeFocusRequested(object sender, WUX.Hosting.DesktopWindowXamlSourceTakeFocusRequestedEventArgs e)
{
if (_lastFocusRequest == e.Request.CorrelationId)
{
// If we've arrived at this point, then focus is being move back to us
// therefore, we should complete the operation to avoid an infinite recursion
// by "Restoring" the focus back to us under a new correctationId
var newRequest = new WUX.Hosting.XamlSourceFocusNavigationRequest(
WUX.Hosting.XamlSourceFocusNavigationReason.Restore);
_xamlSource.NavigateFocus(newRequest);
}
else
{
_onTakeFocusRequested = true;
try
{
// Last focus request is not initiated by us, so continue
_lastFocusRequest = e.Request.CorrelationId;
var direction = MapReasonToDirection[e.Request.Reason];
var request = new System.Windows.Input.TraversalRequest(direction);
MoveFocus(request);
}
finally
{
_onTakeFocusRequested = false;
}
}
}
/// <summary>
/// Responds to DesktopWindowsXamlSource TakeFocusRequested event
/// </summary>
/// <param name="sender">DesktopWindowsXamlSource</param>
/// <param name="args">DesktopWindowXamlSourceTakeFocusRequestedEventArgs</param>
private void OnTakeFocusRequested(Windows.UI.Xaml.Hosting.DesktopWindowXamlSource sender, Windows.UI.Xaml.Hosting.DesktopWindowXamlSourceTakeFocusRequestedEventArgs args)
{
if (_lastFocusRequest == args.Request.CorrelationId)
{
// If we've arrived at this point, then focus is being move back to us
// therefore, we should complete the operation to avoid an infinite recursion
// by "Restoring" the focus back to us under a new correlationId
var newRequest = new Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationRequest(
Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.Restore);
_xamlSource.NavigateFocus(newRequest);
_lastFocusRequest = newRequest.CorrelationId;
}
else
{
// Focus was not initiated by WindowsXamlHost. Continue processing the Focus request.
var reason = args.Request.Reason;
if (reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First || reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.Last)
{
var forward = reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First;
_forceFocusNavigation = true;
try
{
Parent.SelectNextControl(this, forward, tabStopOnly: true, nested: false, wrap: true);
}
finally
{
_forceFocusNavigation = false;
}
}
}
}
/// <summary>
/// Responds to DesktopWindowsXamlSource TakeFocusRequested event
/// </summary>
/// <param name="sender">DesktopWindowsXamlSource</param>
/// <param name="args">DesktopWindowXamlSourceTakeFocusRequestedEventArgs</param>
private void OnTakeFocusRequested(Windows.UI.Xaml.Hosting.DesktopWindowXamlSource sender, Windows.UI.Xaml.Hosting.DesktopWindowXamlSourceTakeFocusRequestedEventArgs args)
{
var reason = args.Request.Reason;
if (reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First || reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.Last)
{
var forward = reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First;
Parent.SelectNextControl(this, forward, tabStopOnly: true, nested: false, wrap: true);
}
}
