private static DragDropInfo GetDragDropInfo(UIElement target, DragEventArgs e,
PokemonDragDropData data)
{
var dragDropInfo = new DragDropInfo();
dragDropInfo.Action = DragDropActions.None;
int folderIndex = DragDropState.GetDraggingOverIndex(target);
var collection = (target as FrameworkElement).DataContext as CollectionViewModel;
if (collection != null && folderIndex != -1)
{
dragDropInfo.TargetFolder = collection.Folders[folderIndex];
if (dragDropInfo.TargetFolder.CanAddPokemon)
{
if (e.KeyStates.HasFlag(DragDropKeyStates.ControlKey))
{
dragDropInfo.Action = DragDropActions.CopyTo;
}
else if (dragDropInfo.TargetFolder != data.SourceFolder)
{
dragDropInfo.Action = DragDropActions.MoveTo;
}
}
}
return dragDropInfo;
}
private static DragDropActions GetDragDropAction(UIElement target, PokemonDragDropData data)
{
if ((target as FrameworkElement).DataContext != data.SourceFolder)
{
return DragDropActions.MoveTo;
}
else
{
return DragDropActions.None;
}
}
private static DragDropInfo GetDragDropInfo(UIElement target, DragEventArgs e,
PokemonDragDropData data)
{
var dragDropInfo = new DragDropInfo();
dragDropInfo.Action = DragDropActions.None;
dragDropInfo.Folder = (target as FrameworkElement).DataContext as IFolderViewModel;
if (dragDropInfo.Folder == null)
return dragDropInfo;
dragDropInfo.InsertIndex = DragDropState.GetInsertionIndex(target);
dragDropInfo.PokemonIndex = DragDropState.GetDraggingOverIndex(target);
if (dragDropInfo.PokemonIndex != -1)
{
if (data.SourceFolder != dragDropInfo.Folder ||
data.PokemonIndexInFolder != dragDropInfo.PokemonIndex)
{
if (e.KeyStates.HasFlag(DragDropKeyStates.ControlKey))
{
dragDropInfo.Action = DragDropActions.Replace;
}
else
{
dragDropInfo.Action = DragDropActions.SwapWith;
}
}
}
else if (dragDropInfo.InsertIndex != -1)
{
if (e.KeyStates.HasFlag(DragDropKeyStates.ControlKey))
{
if (dragDropInfo.Folder.CanAddPokemon)
dragDropInfo.Action = DragDropActions.CopyTo;
}
else if (data.SourceFolder != dragDropInfo.Folder)//movement between folders
{
if (dragDropInfo.Folder.CanAddPokemon)
dragDropInfo.Action = DragDropActions.MoveTo;
}
else//movement within folder
{
if (IsValidMovement(data.PokemonIndexInFolder, dragDropInfo.InsertIndex))
dragDropInfo.Action = DragDropActions.MoveTo;
}
}
return dragDropInfo;
}
public void HandleMouseMove(UIElement sender, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Released)
return;
var selector = sender as Selector;
if (selector == null || selector.SelectedItem == null)
return;
//find the visual item hit
var itemContainer = selector.ItemContainerGenerator.
ContainerFromIndex(selector.SelectedIndex) as FrameworkElement;
if (!FolderDragDropSource.HitElement(e.GetPosition(itemContainer), itemContainer))
return;
var selectedItem = selector.SelectedItem as PokemonViewModel;
IFolderViewModel folder = selectedItem.Folder;
int selectedIndex = selector.SelectedIndex;
var data =
new PokemonDragDropData(selectedItem, DragDropActions.All, folder, selectedIndex);
var dataObj = new DataObject(typeof(IDragDropData), data);
DragDrop.DoDragDrop(selector, dataObj, DragDropEffects.All);
}
private static void CopyItemTo(IFolderViewModel folder, int destIndex,
PokemonDragDropData data)
{
folder.InsertPokemon(destIndex, data.Pokemon.Clone());
}
private static void SwapItem(IFolderViewModel folder, int swapIndex,
PokemonDragDropData data)
{
PokemonViewModel pokemon = data.Pokemon;
int originalIndex = data.PokemonIndexInFolder;
PokemonViewModel swapPokemon = folder.Pokemons[swapIndex];
folder.RemovePokemon(swapPokemon);
data.SourceFolder.RemovePokemon(pokemon);
if (data.SourceFolder == folder && swapIndex < originalIndex)//swap within a folder
{
folder.InsertPokemon(swapIndex, pokemon);
folder.InsertPokemon(originalIndex, swapPokemon);
/*
if (swapIndex < originalIndex)
{
}
else
{
folder.InsertPokemon(originalIndex, swapPokemon);
folder.InsertPokemon(swapIndex, pokemon);
}
*/
}
else//swap between folders
{
data.SourceFolder.InsertPokemon(originalIndex, swapPokemon);
folder.InsertPokemon(swapIndex, pokemon);
}
}
private static void SubstitueItem(IFolderViewModel folder, int destIndex,
PokemonDragDropData data)
{
folder.Pokemons[destIndex].RemoveSelf();
folder.InsertPokemon(destIndex, data.Pokemon.Clone());
}
private static void MoveItemTo(IFolderViewModel folder, int destIndex,
PokemonDragDropData data)
{
//remove the origin item to prevent exceeding the size
data.SourceFolder.RemovePokemon(data.Pokemon);
//adjust index if it is movement within a folder
if (folder == data.SourceFolder && destIndex > data.PokemonIndexInFolder)
destIndex--;
folder.InsertPokemon(destIndex, data.Pokemon);
}
