private bool ExpandAndSelectItem(ItemsControl parentContainer, object itemToSelect)
{
foreach (Object item in parentContainer.Items)
{
count++;
TreeListViewItem currentContainer = parentContainer.ItemContainerGenerator.ContainerFromItem(item) as TreeListViewItem;
if (item == itemToSelect && currentContainer != null)
{
currentContainer.IsSelected = true;
currentContainer.BringIntoView();
currentContainer.Focus();
ScrollViewer viewer = VisualUpwardSearch <ScrollViewer>(currentContainer as DependencyObject) as ScrollViewer;
viewer.ScrollToVerticalOffset(count * 25);
return(true);
}
if (currentContainer != null && currentContainer.Items.Count > 0)
{
bool wasExpanded = currentContainer.IsExpanded;
currentContainer.IsExpanded = true;
currentContainer.UpdateLayout();
if (ExpandAndSelectItem(currentContainer, itemToSelect))
{
return(true);
}
else
{
currentContainer.IsExpanded = wasExpanded;
currentContainer.UpdateLayout();
}
}
}
return(false);
}
protected override void OnPreviewMouseRightButtonDown(MouseButtonEventArgs e)
{
TreeListViewItem tvitem = VisualUpwardSearch <TreeListViewItem>(e.OriginalSource as DependencyObject) as TreeListViewItem;
if (tvitem != null)
{
tvitem.Focus();
}
base.OnPreviewMouseRightButtonDown(e);
}
public void SetScorllViewPosition(object item, object oneLevelTree = null)
{
if (item == null)
{
return;
}
TreeListViewItem container = null;
if (oneLevelTree == null)
{
foreach (var tree in this.Items)
{
TreeListViewItem tlvi = this.ItemContainerGenerator.ContainerFromItem(tree) as TreeListViewItem;
container = FindTreeViewItem(tlvi, item) as TreeListViewItem;
if (container != null)
{
break;
}
}
if (container == null)
{
return;
}
container.BringIntoView();
container.IsSelected = true;
}
else
{
TreeListViewItem tlvi = this.ItemContainerGenerator.ContainerFromItem(oneLevelTree) as TreeListViewItem;
if (item == oneLevelTree)
{
tlvi.IsSelected = true;
tlvi.BringIntoView();
tlvi.Focus();
}
else
{
tlvi.IsExpanded = true;
tlvi.UpdateLayout();
count = 0;
foreach (Object itemTree in this.Items)
{
count++;
if (itemTree == oneLevelTree)
{
break;
}
}
ExpandAndSelectItem(tlvi, item);
}
}
}
