|
public static IsPointInTopHalf ( |
||
| itemsControl | ||
| e | System.Windows.DragEventArgs | |
| return | bool | |
private void UpdateInsertAdorner(ItemsControl itemsControl, DragEventArgs e)
{
if (_insertAdorner != null)
{
_insertAdorner.IsTopHalf = Helper.IsPointInTopHalf(itemsControl, e);
_insertAdorner.InvalidateVisual();
}
}
private void InitializeInsertAdorner(ItemsControl itemsControl, DragEventArgs e)
{
if (_insertAdorner == null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(itemsControl);
UIElement itemContainer = Helper.GetItemContainerFromPoint(itemsControl, e.GetPosition(itemsControl));
if (itemContainer != null)
{
bool isPointInTopHalf = Helper.IsPointInTopHalf(itemsControl, e);
bool isItemsControlOrientationHorizontal = Helper.IsItemControlOrientationHorizontal(itemsControl);
_insertAdorner = new InsertAdorner(isPointInTopHalf, isItemsControlOrientationHorizontal, itemContainer, adornerLayer);
}
}
}
private int FindInsertionIndex(ItemsControl itemsControl, DragEventArgs e)
{
UIElement dropTargetContainer = Helper.GetItemContainerFromPoint(itemsControl, e.GetPosition(itemsControl));
if (dropTargetContainer != null)
{
int index = itemsControl.ItemContainerGenerator.IndexFromContainer(dropTargetContainer);
if (Helper.IsPointInTopHalf(itemsControl, e))
{
return(index);
}
else
{
return(index + 1);
}
}
return(itemsControl.Items.Count);
}
