// Define the Convert method to convert a DateTime value to
// a month string.
public static TreeViewSelectionMode IsRunningToSelectionMode(bool value)
{
// value is the data from the source object.
TreeViewSelectionMode SelectionMode = value ? TreeViewSelectionMode.None : TreeViewSelectionMode.Single;
return(SelectionMode);
}
private void OnPropertyChanged(DependencyPropertyChangedEventArgs args)
{
DependencyProperty property = args.Property;
if (property == SelectionModeProperty && ListControl != null)
{
TreeViewSelectionMode value = SelectionMode;
switch (value)
{
case TreeViewSelectionMode.None:
{
ListControl.SelectionMode = ListViewSelectionMode.None;
UpdateItemsSelectionMode(false);
}
break;
case TreeViewSelectionMode.Single:
{
ListControl.SelectionMode = ListViewSelectionMode.Single;
UpdateItemsSelectionMode(false);
}
break;
case TreeViewSelectionMode.Multiple:
{
ListControl.SelectionMode = ListViewSelectionMode.None;
UpdateItemsSelectionMode(true);
}
break;
}
}
else if (property == ItemsSourceProperty)
{
m_rootNode.IsContentMode = true;
if (ListControl != null)
{
var viewModel = ListControl.ListViewModel;
viewModel.IsContentMode = true;
}
m_rootNode.ItemsSource = ItemsSource;
}
else if (property == SelectedItemProperty)
{
var items = SelectedItems;
var selected = items?.Count > 0 ? items[0] : null;
if (args.NewValue != selected)
{
ListControl?.ListViewModel?.SelectSingleItem(args.NewValue);
}
}
}
public static void SetSelectionMode(TreeView TreeView, TreeViewSelectionMode Value)
{
TreeView.SetValue(SelectionModeProperty, Value);
}