public static void SetIsAltSelected(ExplorerTreeViewItem element, Boolean value, ExplorerTreeView treeView)
{
if (element == null)
{
return;
}
if (value)
{
//deselect previous selection
var selected = ExplorerTreeView.GetAltSelectedItem(treeView);
ExplorerTreeView.AltDeselectItem(treeView, element, element);
}
if (GetIsAltSelected(element) != value)
{
element.SetValue(IsAltSelectedProperty, value);
element.NotifyPropertyChanged("IsAltSelected");
}
object selectedobj = ExplorerTreeView.GetAltSelectedItem(treeView);
if (selectedobj != null && selectedobj.Equals(element.Header))
{
return;
}
ExplorerTreeView.SetAltSelectedItem(treeView, value ? element.Header : null);
}
public static void AltDeselectItem(ExplorerTreeView treeView, ExplorerTreeViewItem treeViewItem, ExplorerTreeViewItem skip)
{
if (treeView != null)
{
for (int i = 0; i < treeView.Items.Count; i++)
{
if (treeView.ItemContainerGenerator.ContainerFromIndex(i) is ExplorerTreeViewItem item)
{
if (item != skip)
{
ExplorerTreeViewItem.SetIsAltSelected(item, false, treeView);
}
AltDeselectItem(null, item, skip);
}
}
}
else
{
for (int i = 0; i < treeViewItem.Items.Count; i++)
{
if (treeViewItem.ItemContainerGenerator.ContainerFromIndex(i) is ExplorerTreeViewItem item)
{
if (item != skip)
{
ExplorerTreeViewItem.SetIsAltSelected(item, false, treeView);
}
AltDeselectItem(null, item, skip);
}
}
}
}
public static object GetAltSelectedItem(ExplorerTreeView element)
{
if (element == null)
{
return(null);
}
return((object)element.GetValue(AltSelectedItemProperty));
}
private static void OnIsAltSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var treeViewItem = d as ExplorerTreeViewItem;
var treeView = ExplorerTreeView.FindTreeView(treeViewItem);
if (treeViewItem != null && treeView != null)
{
//SetIsAltSelected(treeViewItem, GetIsAltSelected(treeViewItem), treeView);
}
}
public static void SetAltSelectedItem(ExplorerTreeView element, object value)
{
if (element == null)
{
return;
}
if (value is FSExplorerItem ei)
{
value = ei.Info;
}
if (element.GetValue(AltSelectedItemProperty) != value)
{
element.SetValue(AltSelectedItemProperty, value);
element.NotifyPropertyChanged("AltSelectedItem");
}
}
