private void OnEnable()
{
_shoppingList = new List <string>()
{
"Bread", "Carrots", "Beans", "Steak", "Coffee", "Fries"
};
_shoppingListAdaptor = new ExampleListAdaptor(_shoppingList);
_purchaseList = new List <string>()
{
"Cheese", "Crackers"
};
_purchaseListAdaptor = new ExampleListAdaptor(_purchaseList);
}
public void ProcessDropInsertion(int insertionIndex)
{
if (Event.current.type == EventType.DragPerform)
{
var draggedItem = DragAndDrop.GetGenericData(DraggedItem.TypeName) as DraggedItem;
// Are we just reordering within the same list?
if (draggedItem.SourceListAdaptor == this)
{
Move(draggedItem.Index, insertionIndex);
}
else
{
// Nope, we are moving the item!
List.Insert(insertionIndex, draggedItem.ShoppingItem);
draggedItem.SourceListAdaptor.Remove(draggedItem.Index);
// Ensure that the item remains selected at its new location!
s_SelectedList = this;
}
}
}
public override void DrawItem(Rect position, int index)
{
string shoppingItem = List[index];
int controlID = GUIUtility.GetControlID(FocusType.Passive);
switch (Event.current.GetTypeForControl(controlID))
{
case EventType.MouseDown:
Rect totalItemPosition = ReorderableListGUI.CurrentItemTotalPosition;
if (totalItemPosition.Contains(Event.current.mousePosition))
{
// Select this list item.
s_SelectedList = this;
s_SelectedItem = shoppingItem;
}
// Calculate rectangle of draggable area of the list item.
// This example excludes the grab handle at the left.
Rect draggableRect = totalItemPosition;
draggableRect.x = position.x;
draggableRect.width = position.width;
if (Event.current.button == 0 && draggableRect.Contains(Event.current.mousePosition))
{
// Select this list item.
s_SelectedList = this;
s_SelectedItem = shoppingItem;
// Lock onto this control whilst left mouse button is held so
// that we can start a drag-and-drop operation when user drags.
GUIUtility.hotControl = controlID;
s_MouseDownPosition = Event.current.mousePosition;
Event.current.Use();
}
break;
case EventType.MouseDrag:
if (GUIUtility.hotControl == controlID)
{
GUIUtility.hotControl = 0;
// Begin drag-and-drop operation when the user drags the mouse
// pointer across the threshold. This threshold helps to avoid
// inadvertently starting a drag-and-drop operation.
if (Vector2.Distance(s_MouseDownPosition, Event.current.mousePosition) >= MouseDragThresholdInPixels)
{
// Prepare data that will represent the item.
var item = new DraggedItem(this, index, shoppingItem);
// Start drag-and-drop operation with the Unity API.
DragAndDrop.PrepareStartDrag();
// Need to reset `objectReferences` and `paths` because `PrepareStartDrag`
// doesn't seem to reset these (at least, in Unity 4.x).
DragAndDrop.objectReferences = new Object[0];
DragAndDrop.paths = new string[0];
DragAndDrop.SetGenericData(DraggedItem.TypeName, item);
DragAndDrop.StartDrag(shoppingItem);
}
// Use this event so that the host window gets repainted with
// each mouse movement.
Event.current.Use();
}
break;
case EventType.Repaint:
EditorStyles.label.Draw(position, shoppingItem, false, false, false, false);
break;
}
}
public DraggedItem(ExampleListAdaptor sourceList, int index, string shoppingItem)
{
SourceListAdaptor = sourceList;
Index = index;
ShoppingItem = shoppingItem;
}
