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);
}
private TreeListViewItem FindTreeViewItem(ItemsControl item, object data)
{
TreeListViewItem findItem = null;
bool itemIsExpand = false;
if (item is TreeListViewItem)
{
TreeListViewItem tviCurrent = item as TreeListViewItem;
object itemData = tviCurrent.DataContext;
if (itemData == data)
{
findItem = tviCurrent;
}
else
{
itemIsExpand = tviCurrent.IsExpanded;
if (!tviCurrent.IsExpanded)
{
tviCurrent.SetValue(TreeViewItem.IsExpandedProperty, true);
tviCurrent.UpdateLayout();
}
}
}
if (findItem == null)
{
for (int i = 0; i < item.Items.Count; i++)
{
TreeListViewItem tvItem = (TreeListViewItem)item.ItemContainerGenerator.ContainerFromIndex(i);
if (tvItem == null)
{
continue;
}
object itemData = item.Items[i];
if (itemData == data)
{
findItem = tvItem;
break;
}
else if (tvItem.Items.Count > 0)
{
findItem = FindTreeViewItem(tvItem, data);
if (findItem != null)
{
break;
}
}
}
TreeListViewItem tviCurrent = item as TreeListViewItem;
tviCurrent.SetValue(TreeListViewItem.IsExpandedProperty, itemIsExpand);
tviCurrent.UpdateLayout();
}
return(findItem);
}
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);
}
}
}
