private void DropItem(LuiAccordionItem source, LuiAccordionItem target)
{
if (GetList() is System.Collections.IList list)
{
MoveItem(list, source, target);
}
}
protected override bool IsItemItsOwnContainerOverride(object item)
{
try
{
if (item is LuiAccordionItem accordionitem)
{
if (collapseAllOnExpandSingle)
{
DependencyPropertyDescriptor
.FromProperty(LuiAccordionItem.IsExpandedProperty, typeof(LuiAccordionItem))
.AddValueChanged(accordionitem, IsExpandedChanged);
}
if (accordionitem.IsExpanded)
{
expandedItem = accordionitem;
}
return(true);
}
}
catch (Exception ex)
{
logger.Error(ex);
}
return(false);
}
private void CollapseAllItems(LuiAccordionItem sender)
{
foreach (var item in Items)
{
if (item != sender.DataContext)
{
if (ItemContainerGenerator.ContainerFromItem(item) is LuiAccordionItem itemContainer)
{
itemContainer.IsExpanded = false;
}
}
}
}
protected override DependencyObject GetContainerForItemOverride()
{
var retval = new LuiAccordionItem();
try
{
if (collapseAllOnExpandSingle)
{
DependencyPropertyDescriptor
.FromProperty(LuiAccordionItem.IsExpandedProperty, typeof(LuiAccordionItem))
.AddValueChanged(retval, IsExpandedChanged);
}
}
catch (Exception ex)
{
logger.Error(ex);
}
return(retval);
}
private void MoveItem(System.Collections.IList list, LuiAccordionItem source, LuiAccordionItem target)
{
int sourceIndex = ItemContainerGenerator.IndexFromContainer(source);
int targetIndex = ItemContainerGenerator.IndexFromContainer(target);
int sortindexsource = source.Index;
int sortindextarget = target.Index;
if (isDragDropChangesUnderlyingCollection)
{
object valueToMove = list[sourceIndex];
if (sourceIndex != targetIndex)
{
if (list is ObservableCollection <object> olist)
{
olist.Move(sourceIndex, targetIndex);
}
else
{
list.RemoveAt(sourceIndex);
list.Insert(targetIndex, valueToMove);
}
AdjustIndexes(list, sortindexsource, sortindextarget);
if (ItemContainerGenerator.ContainerFromItem(valueToMove) is LuiAccordionItem movedItemContainer)
{
movedItemContainer.Index = sortindextarget;
}
}
}
else
{
AdjustIndexes(list, sortindexsource, sortindextarget);
source.Index = sortindextarget;
}
}