protected override void Awake()
{
base.Awake();
_associatedTreeViewSelectable = GetComponentInChildren <ITreeViewSelectable>();
_associatedTreeViewSelectable.SetAssociatedTreeViewElement(this);
}
// does the real multi select
private void SelectedItemChangedHandler(TreeViewItem item)
{
if (!this.MultiSelect)
{
return;
}
ITreeViewSelectable content = (ITreeViewSelectable)item.Header;
_itemToCheck = null;
if (content.IsSelected)
{
// Check it at the mouse up event to avoid deselecting everything when clicking to drag
_itemToCheck = item;
}
else
{
if (!this.IsCtrlPressed)
{
GetTreeViewItems(true)
.Select(t => t.Header)
.Cast <ITreeViewSelectable>()
.ToList()
.ForEach(f => f.IsSelected = false);
}
if (this.IsShiftPressed && _lastItemSelected != null)
{
foreach (TreeViewItem tempItem in GetTreeViewItemsBetween(_lastItemSelected, item))
{
((ITreeViewSelectable)tempItem.Header).IsSelected = true;
_lastItemSelected = tempItem;
}
}
else
{
content.IsSelected = true;
_lastItemSelected = item;
this.treeViewInner.Items.Refresh();
this.treeViewInner.UpdateLayout();
}
}
}
