private void TreeListViewNodeSelected(object sender, ItemSelectedEventArgs <TreeListView.Node> e)
{
if (m_selectionContext == null)
{
return;
}
object item = e.Item.Tag;
if (item == null)
{
return;
}
if (e.Selected)
{
m_selectionContext.Add(item);
}
else
{
m_selectionContext.Remove(item);
}
ItemSelected.Raise(this, new NodeAdapterEventArgs(item, e.Item));
}
private void HandleSelectionUpdates()
{
if (m_selectionContext == null)
{
return;
}
object hitItem = LastHit;
if ((hitItem == null) || (hitItem == this))
{
return;
}
TreeListView.Node hitNode;
if (!m_dictNodes.TryGetValue(hitItem, out hitNode))
{
return;
}
HashSet <object> oldSelection = null;
HashSet <object> newSelection = null;
var handler = ItemSelected;
if (handler != null)
{
oldSelection = new HashSet <object>(m_selectionContext.Selection);
}
switch (Control.ModifierKeys)
{
case Keys.Shift:
{
if (m_selectionStartItem != null)
{
int idx1 = m_treeListView.GetNodeIndex(m_selectionStartItem);
int idx2 = m_treeListView.GetNodeIndex(hitNode);
int startIndex = Math.Min(idx1, idx2);
int endIndex = Math.Max(idx1, idx2);
newSelection = new HashSet <object>();
for (int i = startIndex; i <= endIndex; i++)
{
TreeListView.Node item = m_treeListView.GetNodeAtIndex(i);
newSelection.Add(item.Tag);
}
m_selectionContext.SetRange(newSelection);
}
else
{
m_selectionContext.Set(hitItem);
m_selectionStartItem = hitNode;
}
}
break;
case Keys.Control:
{
if (m_selectionContext.SelectionContains(hitItem))
{
m_selectionContext.Remove(hitItem);
}
else
{
m_selectionContext.Add(hitItem);
}
m_selectionStartItem = hitNode;
}
break;
default:
{
m_selectionContext.Set(hitItem);
m_selectionStartItem = hitNode;
}
break;
}
if (handler == null)
{
return;
}
if (newSelection == null)
{
newSelection = new HashSet <object>(m_selectionContext.Selection);
}
foreach (object removed in oldSelection.Except(newSelection))
{
TreeListView.Node node;
if (!m_dictNodes.TryGetValue(removed, out node))
{
continue;
}
ItemSelected.Raise(this, new NodeAdapterEventArgs(removed, node));
}
foreach (object added in newSelection.Except(oldSelection))
{
TreeListView.Node node;
if (!m_dictNodes.TryGetValue(added, out node))
{
continue;
}
ItemSelected.Raise(this, new NodeAdapterEventArgs(added, node));
}
}
private void queryOptionItem_Clicked(object sender, EventArgs e)
{
ItemSelected.Raise(this, EventArgs.Empty);
}