/// <summary>
/// Moves the set of supplied sprites to be before (or after) the specified
/// sprite in the folder. This takes account of the fact that NearestSprite
/// could be one of the ones being moved.
/// </summary>
private List<Sprite> MoveSpritesIntoNewPositionInFolder(int nearestSprite, bool putSpritesBeforeSelection, SpriteManagerDragDropData dragged)
{
List<Sprite> newFolderContents = new List<Sprite>();
foreach (Sprite sprite in _currentFolder.Sprites)
{
bool addThisSpriteToNewList = true;
if (sprite.Number == nearestSprite)
{
if (!putSpritesBeforeSelection)
{
newFolderContents.Add(sprite);
addThisSpriteToNewList = false;
}
foreach (Sprite draggedSprite in dragged.Sprites)
{
if ((draggedSprite.Number != sprite.Number) || (putSpritesBeforeSelection))
{
newFolderContents.Add(draggedSprite);
}
}
}
foreach (Sprite draggedSprite in dragged.Sprites)
{
if (sprite.Number == draggedSprite.Number)
{
addThisSpriteToNewList = false;
break;
}
}
if (addThisSpriteToNewList)
{
newFolderContents.Add(sprite);
}
}
return newFolderContents;
}
private void spriteList_ItemDrag(object sender, ItemDragEventArgs e)
{
SpriteManagerDragDropData dragDropData = new SpriteManagerDragDropData();
foreach (ListViewItem selectedItem in spriteList.SelectedItems)
{
dragDropData.Sprites.Add(FindSpriteByNumber(Convert.ToInt32(selectedItem.Name)));
}
this.DoDragDrop(dragDropData, DragDropEffects.Move);
}