protected void remove_WLock(MediaItem item)
{
SelectableMediaItem selectableItem = new SelectableMediaItem(item);
int index = MediaCollectionView.IndexOf(selectableItem);
removeAt_WLock(index);
}
public void selectRange(MediaItem end)
{
EnterWriteLock();
try
{
bool selectionChanged = false;
MediaItem start = null;
int startIndex = getSelectedItem_RLock(out start);
int endIndex = MediaCollectionView.IndexOf(new SelectableMediaItem(end));
if (endIndex == -1)
{
return;
}
else if (startIndex == -1)
{
startIndex = 0;
}
if (endIndex < startIndex)
{
int temp = startIndex;
startIndex = endIndex;
endIndex = temp;
}
for (int i = startIndex; i <= endIndex; i++)
{
MediaCollectionView[i].SelectionChanged -= selectableItem_SelectionChanged;
if (MediaCollectionView[i].IsSelected == false)
{
selectionChanged = true;
}
MediaCollectionView[i].IsSelected = true;
MediaCollectionView[i].SelectionChanged += selectableItem_SelectionChanged;
}
if (selectionChanged)
{
QueueSelectionChangedEvent();
}
}
finally
{
ExitWriteLock();
}
}
protected void reSort(MediaItem item)
{
int oldIndex = 0;
int newIndex = 0;
EnterWriteLock();
try
{
SelectableMediaItem selectableItem = new SelectableMediaItem(item);
oldIndex = MediaCollectionView.IndexOf(selectableItem);
newIndex = oldIndex;
if (oldIndex != -1)
{
selectableItem = MediaCollectionView[oldIndex];
// item is already in the list
if (Filter(selectableItem))
{
// remove and reinsert item
MediaCollectionView.RemoveAt(oldIndex);
if (oldIndex < sortedItemEnd)
{
sortedItemEnd -= 1;
}
newIndex = insertSorted_WLock(selectableItem);
if (newIndex != oldIndex)
{
QueueItemResortedEvent(item, oldIndex, newIndex);
}
}
else
{
// remove item from list
removeAt_WLock(oldIndex);
}
}
else
{
// add item to list
add_WLock(item);
}
}
finally
{
ExitWriteLock();
}
}
/// <summary>
/// Returns index of Media item, query under read lock
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public int IndexOf(SelectableMediaItem item)
{
return(MediaCollectionView.IndexOf(item));
}