private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CheckBoxTreeView dp = (CheckBoxTreeView)d;
if (dp._treeView != null)
{
dp._treeView.ItemsSource = e.NewValue as IEnumerable;
}
}
private static void OnItemTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CheckBoxTreeView dp = (CheckBoxTreeView)d;
if (dp._treeView != null)
{
dp._treeView.ItemTemplate = e.NewValue as DataTemplate;
}
}
private static object CoerceIsDropDownOpen(DependencyObject d, object baseValue)
{
if ((bool)baseValue)
{
CheckBoxTreeView cb = (CheckBoxTreeView)d;
if (!cb.IsLoaded)
{
//cb.RegisterToOpenOnLoad();
return(false);
}
}
return(baseValue);
}
private static void OnTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CheckBoxTreeView ctv = d as CheckBoxTreeView;
if (e.NewValue != null)
{
if (e.NewValue.ToString() != ctv._textBox.Text)
{
ctv._textBox.Text = e.NewValue.ToString();
}
}
else
{
ctv._textBox.Text = null;
}
}
private static void OnIsDropDownOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CheckBoxTreeView cb = (CheckBoxTreeView)d;
if (cb._poup != null)
{
if ((bool)e.NewValue)
{
cb.Dispatcher.BeginInvoke(DispatcherPriority.Send, (DispatcherOperationCallback) delegate(object arg)
{
//展开所有子节点
if (cb._treeView != null && cb.ItemsSource != null)
{
foreach (var item in cb._treeView.Items)
{
if (item is MultiSelectionTreeViewItem)
{
(item as MultiSelectionTreeViewItem).IsExpanded = true;
}
else
{
MultiSelectionTreeViewItem tvi = cb._treeView.ItemContainerGenerator.ContainerFromItem(item) as MultiSelectionTreeViewItem;
if (tvi != null)
{
if (!tvi.IsExpanded)
{
tvi.IsExpanded = true;
}
//如果子项还没有初始化容器，则刷新布局获取容器，保证取遍历的时候取到
if (tvi.ItemContainerGenerator.Status != System.Windows.Controls.Primitives.GeneratorStatus.ContainersGenerated)
{
tvi.UpdateLayout();
}
tvi.ExpandAllChildren();
}
}
}
}
return(null);
}, cb);
}
}
}