private void SelectionChangedEventHandler(object sender, SelectionChangedEventArgs args)
{
FrameworkElement element = (FrameworkElement)ThumbnailListBox.SelectedItem;
if (element != null)
{
ThumbnailListBox.ScrollIntoView(element);
//element.BringIntoView(); // this one only works sometimes... because of reasons...
}
}
void ThumbnailListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.AddedItems.Count > 0)
{
var item = e.AddedItems[0] as ListBoxItem;
ThumbnailListBox.ScrollIntoView(ThumbnailListBox.SelectedItem);
if (!_isSelectionChangeProgrammatic)
{
_viewer.SetCurrentPage((int)item.Tag + 1);
}
}
}
void UpdateSelectedIndex()
{
if (ThumbnailListBox.Items.Count == 0)
{
ThumbnailListBox.SelectedIndex = -1;
}
else if (ThumbnailListBox.Items.Count < _viewer.GetCurrentPage())
{
ThumbnailListBox.SelectedIndex = 0;
}
else if (ThumbnailListBox.SelectedIndex != _viewer.GetCurrentPage() - 1)
{
ThumbnailListBox.SelectedIndex = _viewer.GetCurrentPage() - 1;
}
ThumbnailListBox.ScrollIntoView(ThumbnailListBox.SelectedItem);
ItemsInViewHitTest();
}
private void ScrollElementIntoView(ThumbnailItem item)
{
ThumbnailListBox.ScrollIntoView(item);
this.Focus();
}