public static void SetSynchronizedScrollViewerPosition(DependencyObject obj, SynchronizedScrollViewerPosition value)
{
obj.SetValue(TableViewScrollViewer.SynchronizedScrollViewerPositionProperty, value);
}
public static void SetSynchronizedScrollViewerPosition( DependencyObject obj, SynchronizedScrollViewerPosition value )
{
obj.SetValue( TableViewScrollViewer.SynchronizedScrollViewerPositionProperty, value );
}
private void UpdateChildScrollViewers()
{
bool isAtTop = (this.VerticalOffset == 0);
bool isAtLeft = (this.HorizontalOffset == 0);
bool isAtBottom = ((this.VerticalOffset + this.ViewportHeight) == this.ExtentHeight);
bool isAtRight = ((this.HorizontalOffset + this.ViewportWidth) == this.ExtentWidth);
foreach (SynchronizedScrollViewer scrollViewer in m_childScrollViewers)
{
SynchronizedScrollViewerPosition position = TableViewScrollViewer.GetSynchronizedScrollViewerPosition(scrollViewer);
bool handled = false;
switch (position)
{
case SynchronizedScrollViewerPosition.Top:
if (isAtTop == true)
{
KeyboardNavigation.SetDirectionalNavigation(scrollViewer, KeyboardNavigationMode.Continue);
KeyboardNavigation.SetTabNavigation(scrollViewer, KeyboardNavigationMode.Continue);
handled = true;
}
break;
case SynchronizedScrollViewerPosition.Bottom:
if (isAtBottom == true)
{
KeyboardNavigation.SetDirectionalNavigation(scrollViewer, KeyboardNavigationMode.Continue);
KeyboardNavigation.SetTabNavigation(scrollViewer, KeyboardNavigationMode.Continue);
handled = true;
}
break;
case SynchronizedScrollViewerPosition.Left:
if (isAtLeft == true)
{
KeyboardNavigation.SetDirectionalNavigation(scrollViewer, KeyboardNavigationMode.Continue);
KeyboardNavigation.SetTabNavigation(scrollViewer, KeyboardNavigationMode.Continue);
handled = true;
}
break;
case SynchronizedScrollViewerPosition.Right:
if (isAtRight == true)
{
KeyboardNavigation.SetDirectionalNavigation(scrollViewer, KeyboardNavigationMode.Continue);
KeyboardNavigation.SetTabNavigation(scrollViewer, KeyboardNavigationMode.Continue);
handled = true;
}
break;
case SynchronizedScrollViewerPosition.None:
default:
break;
}
if (handled == false)
{
KeyboardNavigation.SetDirectionalNavigation(scrollViewer, KeyboardNavigationMode.None);
KeyboardNavigation.SetTabNavigation(scrollViewer, KeyboardNavigationMode.None);
}
}
}
