/// <summary>
/// On any item drag start need to disable all items raycast for correct drop operation
/// </summary>
/// <param name="item"> dragged item </param>
private void OnAnyItemDragStart(DragAndDropItem item)
{
UpdateMyItem();
if (myDadItem != null)
{
myDadItem.MakeRaycast(false); // Disable item's raycast for correct drop handling
if (myDadItem == item) // If item dragged from this cell
{
// Check cell's type
switch (cellType)
{
case CellType.DropOnly:
DragAndDropItem.icon.SetActive(false); // Item can not be dragged. Hide icon
break;
}
}
}
}
/// <summary>
/// Destroy item in this cell
/// </summary>
private void DestroyItem()
{
UpdateMyItem();
if (myDadItem != null)
{
DropEventDescriptor desc = new DropEventDescriptor();
// Fill event descriptor
desc.triggerType = TriggerType.ItemWillBeDestroyed;
desc.item = myDadItem;
desc.sourceCell = this;
desc.destinationCell = this;
SendNotification(desc); // Notify application about item destruction
if (myDadItem != null)
{
Destroy(myDadItem.gameObject);
}
}
myDadItem = null;
UpdateBackgroundState();
}
/// <summary>
/// Put item into this cell.
/// </summary>
/// <param name="item">Item.</param>
private void PlaceItem(DragAndDropItem item)
{
if (item != null)
{
DestroyItem(); // Remove current item from this cell
myDadItem = null;
DragAndDropCell cell = item.GetComponentInParent <DragAndDropCell>();
if (cell != null)
{
if (cell.unlimitedSource == true)
{
string itemName = item.name;
item = Instantiate(item); // Clone item from source cell
item.name = itemName;
}
}
item.transform.SetParent(transform, false);
item.transform.localPosition = Vector3.zero;
item.MakeRaycast(true);
myDadItem = item;
}
UpdateBackgroundState();
}
/// <summary>
/// Updates my item
/// </summary>
public void UpdateMyItem()
{
myDadItem = GetComponentInChildren <DragAndDropItem>();
}
/// <summary>
/// Item is dropped in this cell
/// </summary>
/// <param name="data"></param>
public void OnDrop(PointerEventData data)
{
if (DragAndDropItem.icon == null)
{
return;
}
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))
{
if (!section.Equals(item.section))
{
return;
}
if ((!slot.Equals(item.slot)) && (!slot.Equals(DragAndDrop.Slot.Everything)))
{
return;
}
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:
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();
}
