private void FilterView_PreviewMouseMove(object sender, MouseEventArgs e)
{
// Get the current mouse position
Point mousePos = e.GetPosition(null);
Vector diff = startPoint - mousePos;
if (e.LeftButton == MouseButtonState.Pressed && (Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance ||
Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance))
{
// Get the dragged ListViewItem
ListView listView = sender as ListView;
ListViewItem listViewItem =
WPFHelper.FindAnchestor <ListViewItem>((DependencyObject)e.OriginalSource);
if (listViewItem == null)
{
return;
}
// Find the data behind the ListViewItem
AssetItem item = (AssetItem)listView.ItemContainerGenerator.
ItemFromContainer(listViewItem);
// Initialize the drag & drop operation
DataObject dragData = new DataObject("assetFormat", item);
DragDrop.DoDragDrop(listViewItem, dragData, DragDropEffects.Move);
}
}