void OnBladePageSelected(object sender, RoutedEventArgs e)
{
BladePage page = e.OriginalSource as BladePage;
if (page != null)
{
this.SelectedIndex = this.ItemContainerGenerator.IndexFromContainer(page);
}
}
protected override Size ArrangeOverride(Size finalSize)
{
double runningTop = 0;
double animationSpeed = 350;
bool selectedBladeSeen = false;
BladePage lastBladePage = null;
if (finalSize.Height != lastLayoutHeight)
{
animationSpeed = 0;
}
foreach (var blade in this.InternalChildren.OfType <BladePage>())
{
lastBladePage = blade;
var rect = new Rect(0, 0, finalSize.Width, this.contentHeight + blade.DesiredHeaderHeight);
blade.Arrange(rect);
var xlat = blade.RenderTransform as TranslateTransform;
if (xlat == null)
{
xlat = new TranslateTransform();
blade.RenderTransform = xlat;
AnimateTransformTo(xlat, runningTop, 0); // First time we've seen it
}
else
{
AnimateTransformTo(xlat, runningTop, animationSpeed);
}
if (!selectedBladeSeen && blade.IsSelected)
{
selectedBladeSeen = true;
runningTop += this.contentHeight + blade.DesiredHeaderHeight;
}
else
{
runningTop += blade.DesiredHeaderHeight;
}
}
this.lastLayoutHeight = finalSize.Height;
if (!selectedBladeSeen && lastBladePage != null)
{
// This will force another arrange pass, but should be very rare
lastBladePage.IsSelected = true;
}
return(finalSize);
}
static void OnIsSelectedChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
BladePage page = obj as BladePage;
if (page != null)
{
var parentControl = page.FindParent <BladeControl>();
if (page.IsSelected)
{
page.RaiseEvent(new RoutedEventArgs(SelectedEvent, page));
if (parentControl != null && parentControl.IsKeyboardFocusWithin &&
page.lastElementWithFocus != null && page.lastElementWithFocus.IsLoaded)
{
page.lastElementWithFocus.Focus();
}
}
}
}
