Move drag drop item via code?

[Shifty Geezer]

What's the correct way to return a drag/drop item to a scrollview via code? I have a list of players and when a player joins via network, return the corresponding character to the selection list. This works by modifying the OnDragDropRelease() method except the scrollview script isn't assigned so I can't scroll the selector.

[ArenMook]

A drag & drop item is still just a UI element. You can reparent it under a different UI element and execute that element's parent UIGrid's Reposition() like the drag & drop script does.

[Shifty Geezer]

Think that's what I'm doing, but the Scrollview isn't being assigned in the attached UIDragScrollView script.

1. public void ReturnToRoster(){
2.         IO_DragDropContainer container = sourceContainer;
3.         if (container != currentContainer)      {
4.                 if(container == sourceContainer){
5.                         // Returned to roster. Change selected char to none?
6.                         gameObject.name = "adventurer"+(((adventurerIndex+1) < 10) ? "0" : "")+(adventurerIndex+1);
7.                         UpdateParty(container);        
8.                 }
9.         }else{
10.                 mTrans.parent = mParent;                                // return to container                                         
11.         }
12.                
13.         // Update the grid and table references
14.         mParent = mTrans.parent;
15.         mGrid = NGUITools.FindInParents<UIGrid>(mParent);
16.         mTable = NGUITools.FindInParents<UITable>(mParent);
17. //      mDragScrollView.scrollView = sourceScrollview;
18.         // Re-enable the drag scroll view script
19.         if (mDragScrollView != null)
20.                 StartCoroutine(EnableDragScrollView());
21.                
22.         // Notify the widgets that the parent has changed
23.         NGUITools.MarkParentAsChanged(gameObject);
24.                
25.         if (mTable != null) mTable.repositionNow = true;
26.         if (mGrid != null) mGrid.repositionNow = true;
27.                
28.         // We're now done. Get new container
29.         OnDragDropEnd();
30.  
31.  
32.         void UpdateParty(IO_DragDropContainer container){
33.                 // Common container actions for both roster and party
34.                 mTrans.parent = (container.reparentTarget != null) ? container.reparentTarget : container.transform;
35.                 Vector3 pos = mTrans.localPosition;
36.                 pos.z = 0f;
37.                 mTrans.localPosition = pos;
38.                
39.                 currentContainer = NGUITools.FindInParents<IO_DragDropContainer>(container.transform);
40.                 if (currentContainer == partyContainer){
41.                         // See if can add
42. //                      partyMember = charSelectControl.NextFreePartySpace();
43. //                      if(partyMember > 0){
44.                                 charSelectControl.AddToParty(this);
45.                                 // Set character size
46. //                              charSelectControl.ChangeChar (sprite, partyMember);
47. //                      }
48.                 }else if(currentContainer == sourceContainer){
49.                                 // Reset size when returning to roster
50.                         print ("Remove from party member "+partyMember);
51.                         charSelectControl.RemoveFromParty (partyMember);
52.                         partyMember = 0;
53.                         sprite.SetDimensions (charSelectControl.sourceSize, charSelectControl.sourceSize);
54.                 }
55.         }
56.        
57. }
58.  

If I try setting DragScrollView.scrollView = sourceScrollview, it doesn't change when dropped into a new container. It's supposed to be set in OnEnable in UIDragScrollview but that's not getting called.

[ArenMook]

Why are you calling OnDragDropEnd()?

If you're trying to do this while dragging the element, you should be doing it via UIDragDropItem.StopDragging().