internal void ChangeSelection(object data, CustomTreeViewItem container, bool?selected)
{
if (SelectMode == SelectionMode.Single)
{
if (selected.Value)
{//单选时选中
_selectedContainers.ForEach(r =>
{
r.IsSelected = false;
});
_selectedContainers.Clear();
container.IsSelected = selected.Value;
_selectedContainers.Add(container);
SetValue(SelectedItemsPropertyKey, new List <object>()
{
data
});
}
}
else if (SelectMode != SelectionMode.Single)
{
container.IsSelected = selected;
if (selected.HasValue)
{
if (selected.Value)
{//多选选中
if (_selectedContainers.Contains(container) == false)
{
_selectedContainers.Add(container);
}
var selItems = SelectedItems;
if (selItems.Contains(data) == false)
{
selItems.Add(data);
SetValue(SelectedItemsPropertyKey, selItems);
}
}
else
{
if (_selectedContainers.Contains(container))
{
_selectedContainers.Remove(container);
}
var selItems = SelectedItems;
if (selItems.Contains(data))
{
selItems.Remove(data);
SetValue(SelectedItemsPropertyKey, selItems);
}
}
}
}
RoutedEventArgs args = new RoutedEventArgs(SelectedItemsChangedEvent, this);
RaiseEvent(args);
}
private static void OnExpandedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CustomTreeViewItem treeViewItem = d as CustomTreeViewItem;
if ((bool)e.NewValue)
{
RoutedEventArgs args = new RoutedEventArgs(ExpandedEvent, treeViewItem);
treeViewItem.RaiseEvent(args);
}
else
{
RoutedEventArgs args = new RoutedEventArgs(CollapsedEvent, treeViewItem);
treeViewItem.RaiseEvent(args);
}
}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
CustomTreeViewItem item = (CustomTreeViewItem)value;
ItemsControl ic = ItemsControl.ItemsControlFromItemContainer(item);
if (ic.ItemContainerGenerator.IndexFromContainer(item) == ic.Items.Count - 1)
{
return("l");
}
else if (ic.ItemContainerGenerator.IndexFromContainer(item) == 0)
{
return("f");
}
else
{
return("");
}
}
internal void SetIsSelect(CustomTreeViewItem treeViewItem, bool?isSelected)
{
if (treeViewItem == null)
{
return;
}
CustomTreeView tree = GetParentTreeView();
ItemsControl parent = ItemsControl.ItemsControlFromItemContainer(treeViewItem);
if (tree != null && parent != null)
{
object data = parent.ItemContainerGenerator.ItemFromContainer(treeViewItem);
tree.ChangeSelection(data, treeViewItem, isSelected);
if (IsSelected.HasValue)
{
if (IsSelected.Value)
{
RoutedEventArgs args = new RoutedEventArgs(SelectedEvent, treeViewItem);
treeViewItem.RaiseEvent(args);
}
else
{
RoutedEventArgs args = new RoutedEventArgs(UnselectedEvent, treeViewItem);
treeViewItem.RaiseEvent(args);
}
}
}
if (tree.SelectMode != SelectionMode.Single)
{
treeViewItem.IsExpanded = true;
treeViewItem.UpdateLayout();
for (int i = 0; i < treeViewItem.Items.Count; i++)
{
CustomTreeViewItem subItem = (CustomTreeViewItem)treeViewItem.ItemContainerGenerator.ContainerFromIndex(i);
SetIsSelect(subItem, isSelected);
}
CascadingSetParentIsSelected(parent as CustomTreeViewItem);
}
}
private void CascadingSetParentIsSelected(CustomTreeViewItem parent)
{
if (parent == null)
{
return;
}
int selectedCnt = 0;
int unselectedCnt = 0;
for (int i = 0; i < parent.Items.Count; i++)
{
CustomTreeViewItem item = parent.ItemContainerGenerator.ContainerFromIndex(i) as CustomTreeViewItem;
if (item.IsSelected.HasValue)
{
if (item.IsSelected.Value)
{
selectedCnt += 1;
}
else
{
unselectedCnt += 1;
}
}
}
if (selectedCnt == parent.Items.Count)
{
parent.IsSelected = true;
}
else if (unselectedCnt == parent.Items.Count)
{
parent.IsSelected = false;
}
else
{
parent.IsSelected = null;
}
CascadingSetParentIsSelected(ItemsControl.ItemsControlFromItemContainer(parent) as CustomTreeViewItem);
}