/// <summary>
/// Swap items between two cells
/// </summary>
/// <param name="firstCell"> Cell </param>
/// <param name="secondCell"> Cell </param>
public void SwapItems(DragAndDropCell firstCell, DragAndDropCell secondCell)
{
if ((firstCell != null) && (secondCell != null))
{
DragAndDropItem firstItem = firstCell.GetItem(); // Get item from first cell
DragAndDropItem secondItem = secondCell.GetItem(); // Get item from second cell
// Swap items
if (firstItem != null)
{
firstItem.transform.SetParent(secondCell.transform, false);
firstItem.transform.localPosition = Vector3.zero;
firstItem.MakeRaycast(true);
}
if (secondItem != null)
{
secondItem.transform.SetParent(firstCell.transform, false);
secondItem.transform.localPosition = Vector3.zero;
secondItem.MakeRaycast(true);
}
// Update states
firstCell.UpdateMyItem();
secondCell.UpdateMyItem();
firstCell.UpdateBackgroundState();
secondCell.UpdateBackgroundState();
}
}
/// <summary>
/// Item is dropped in this cell
/// </summary>
/// <param name="data"></param>
public void OnDrop(PointerEventData data)
{
if (DragAndDropItem.icon != null)
{
DragAndDropItem item = DragAndDropItem.draggedItem;
DragAndDropCell sourceCell = DragAndDropItem.sourceCell;
if (DragAndDropItem.icon.activeSelf == true) // If icon inactive do not need to drop item into cell
{
if ((item != null) && (sourceCell != this))
{
DropEventDescriptor desc = new DropEventDescriptor();
switch (cellType) // Check this cell's type
{
case CellType.Swap: // Item in destination cell can be swapped
UpdateMyItem();
switch (sourceCell.cellType)
{
case CellType.Swap: // Item in source cell can be swapped
// Fill event descriptor
desc.item = item;
desc.sourceCell = sourceCell;
desc.destinationCell = this;
SendRequest(desc); // Send drop request
StartCoroutine(
NotifyOnDragEnd(desc)); // Send notification after drop will be finished
if (desc.permission == true) // If drop permitted by application
{
if (myDadItem != null) // If destination cell has item
{
// Fill event descriptor
DropEventDescriptor descAutoswap = new DropEventDescriptor();
descAutoswap.item = myDadItem;
descAutoswap.sourceCell = this;
descAutoswap.destinationCell = sourceCell;
SendRequest(descAutoswap); // Send drop request
StartCoroutine(
NotifyOnDragEnd(
descAutoswap)); // Send notification after drop will be finished
if (descAutoswap.permission == true) // If drop permitted by application
{
SwapItems(sourceCell, this); // Swap items between cells
}
else
{
PlaceItem(
item); // Delete old item and place dropped item into this cell
}
}
else
{
PlaceItem(item); // Place dropped item into this empty cell
}
}
break;
default: // Item in source cell can not be swapped
// Fill event descriptor
desc.item = item;
desc.sourceCell = sourceCell;
desc.destinationCell = this;
SendRequest(desc); // Send drop request
StartCoroutine(
NotifyOnDragEnd(desc)); // Send notification after drop will be finished
if (desc.permission == true) // If drop permitted by application
{
PlaceItem(item); // Place dropped item into this cell
}
break;
}
break;
case CellType.DropOnly: // Item only can be dropped into destination cell
// Fill event descriptor
desc.item = item;
desc.sourceCell = sourceCell;
desc.destinationCell = this;
SendRequest(desc); // Send drop request
StartCoroutine(NotifyOnDragEnd(desc)); // Send notification after drop will be finished
if (desc.permission == true) // If drop permitted by application
{
PlaceItem(item); // Place dropped item in this cell
}
break;
default:
Debug.Log("Drag Only");
break;
}
}
}
if (item != null)
{
if (item.GetComponentInParent <DragAndDropCell>() == null) // If item have no cell after drop
{
Destroy(item.gameObject); // Destroy it
}
}
UpdateMyItem();
UpdateBackgroundState();
sourceCell.UpdateMyItem();
sourceCell.UpdateBackgroundState();
}
}