/// <summary>
/// Raises the drop event.
/// </summary>
/// <param name="eventData">Event data.</param>
public virtual void OnDrop(PointerEventData eventData)
{
// Get the source slot
UISlotBase source = (eventData.pointerPress != null) ? eventData.pointerPress.GetComponent <UISlotBase>() : null;
// Make sure we have the source slot
if (source == null || !source.IsAssigned())
{
return;
}
// Notify the source that a drop was performed so it does not unassign
source.dropPreformed = true;
// Check if this slot is enabled and it's drag and drop feature is enabled
if (!this.enabled || !this.m_DragAndDropEnabled)
{
return;
}
// Prepare a variable indicating whether the assign process was successful
bool assignSuccess = false;
// Normal empty slot assignment
if (!this.IsAssigned())
{
// Assign the target slot with the info from the source
assignSuccess = this.Assign(source);
// Unassign the source on successful assignment and the source is not static
if (assignSuccess && !source.isStatic)
{
source.Unassign();
}
}
// The target slot is assigned
else
{
// If the target slot is not static
// and we have a source slot that is not static
if (!this.isStatic && !source.isStatic)
{
// Check if we can swap
if (this.CanSwapWith(source) && source.CanSwapWith(this))
{
// Swap the slots
assignSuccess = source.PerformSlotSwap(this);
}
}
// If the target slot is not static
// and the source slot is a static one
else if (!this.isStatic && source.isStatic)
{
assignSuccess = this.Assign(source);
}
}
// If this slot failed to be assigned
if (!assignSuccess)
{
this.OnAssignBySlotFailed(source);
}
}
