internal static void ScrollIntoView(NavigationListBox listBox, NodeViewModel node)
{
int pos = node.GetPosition();
if (pos >= listBox.Items.Count)
{
Debug.Fail("Internal error");
throw new InvalidOperationException();
}
listBox.ScrollIntoView(listBox.Items[pos]);
}
internal static void MoveDown(NavigationListBox listBox, NodeViewModel node)
{
var nodes = node.ProjectShell.Nodes;
int pos = node.GetPosition();
if (pos < nodes.Count - 1)
{
var nextNode = nodes[pos + 1];
ShowNode(listBox, nextNode);
}
}
internal static void MoveUp(NavigationListBox listBox, NodeViewModel node)
{
var nodes = node.ProjectShell.Nodes;
int pos = node.GetPosition();
if (pos > 0)
{
var nextNode = nodes[pos - 1];
ShowNode(listBox, nextNode);
}
}
internal static void MoveRight(NavigationListBox listBox, NodeViewModel node)
{
if (!node.IsExpanded)
{
node.IsExpanded = true;
}
else
{
if (node.ChildCount > 0)
{
var childNode = node.GetChild(0);
childNode.Show();
}
}
}
internal static void MoveLeft(NavigationListBox listBox, NodeViewModel node)
{
if (node.IsExpanded)
{
if (node.CanCollapse)
{
node.IsExpanded = false;
}
}
else
{
var parentNode = node.Parent as NodeViewModel;
if (parentNode != null)
{
ShowNode(listBox, parentNode);
}
}
}
internal static void ShowNode(NavigationListBox listBox, NodeViewModel node)
{
ScrollIntoView(listBox, node);
node.IsSelected = true;
}