private static bool _isScrollBarVisible(DependencyObject view)
{
ScrollViewer[] sv = WpfUtilities.FindChildren <ScrollViewer>(view);
if (sv.Length > 0)
{
return(sv[0].ComputedVerticalScrollBarVisibility == Visibility.Visible);
}
return(false);
}
private void OnTreeViewItemPreviewMouseLeftButton(object sender, MouseButtonEventArgs e)
{
var categoryButton = sender as TreeViewItem;
if (!(categoryButton.DataContext is RootNodeCategoryViewModel))
{
return;
}
var wrapPanels = new List <LibraryWrapPanel>();
WpfUtilities.FindChildren <LibraryWrapPanel>(categoryButton, string.Empty, wrapPanels);
if (wrapPanels.Count == 0)
{
return;
}
var selectedElement = e.OriginalSource as FrameworkElement;
var selectedClass = selectedElement.DataContext as NodeCategoryViewModel;
// Continue work with real class: not null, not ClassInformationViewModel.
if (selectedClass == null || selectedClass is ClassInformationViewModel ||
selectedClass.SubCategories.Count > 0)
{
return;
}
// Go through all available for current top category LibraryWrapPanel.
// Select class if wrapPanel contains selectedClass.
// Unselect class in other case.
foreach (var wrapPanel in wrapPanels)
{
if (wrapPanel.MakeOrClearSelection(selectedClass))
{
e.Handled = true;
selectedElement.BringIntoView();
}
}
}