Reparenting and repositioning programatically.

[Genhain]

So for my purposes once the player drags and drops an item from one grid to another, it then checks based on certain specifications whether or not it was a legal move or not...if not it should sent it back to the grid/parent it came from...now i am able to set the parents, but getting them to reposition themselves i am not having much luck here is how I'm trying to do it

1. NGUITools.MarkParentAsChanged(gameObject);
2. bCard.transform.GetComponent<WCDragDropItemSelection>().Parent = bCard.previousParent;
3. bCard.previousParent.GetComponent<UIGrid>().repositionNow = true;
4.  

WCDragDropItemSelection is a subclass of UIDragDropItem...I have also tried using reposition() and i have looked at UIDragDropItem OnDragDropRelease, and i can't seem to figure out what it is i need to do to move the"illegal" item back to the parent it came from.

Thanks in advance.

[ArenMook]

Change the parent first, and only then call MarkParentAsChanged.

[Genhain]

Thanks for the reply aren, but unfortunately no luck... here is the whole function

1. private int addCardToPlayerDeck()
2. {
3.         int cardsSelectedCount = 0;
4.                
5.         foreach( Transform child in transform )
6.         {
7.                 BattleCard bCard = child.GetComponent<BattleCard>();
8.                        
9.                 bCard.cardController = cardOwner;
10.                 bCard.cardOwner = cardOwner;
11.                 child.GetComponent<UISprite>().color = mColor;
12.                 child.GetComponent<UIDragDropItem>().restriction = UIDragDropItem.Restriction.Horizontal;
13.                        
14.                 if( !_selectedBattleCards.Contains(bCard) )
15.                 {
16.                         if(onCardSelected(bCard))
17.                         {
18.                                 _selectedBattleCards.Add(bCard);
19.                         }
20.                         else
21.                         {
22.                                 Debug.Log("current: "+bCard.transform.GetComponent<WCDragDropItemSelection>().Parent+" Previous: " + bCard.previousParent);
23.                                 bCard.transform.GetComponent<WCDragDropItemSelection>().Parent = bCard.previousParent;
24.                                 NGUITools.MarkParentAsChanged(gameObject);
25.                                 bCard.previousParent.GetComponent<UIGrid>().Reposition();
26.                         }
27.                 }
28.                 ++cardsSelectedCount;
29.         }
30.  
31.         return cardsSelectedCount;
32. }
33.  

I did as you suggested and the drag drop item does not switch parents..or at least not visually anyway.

[ArenMook]

What does "bCard.transform.GetComponent<WCDragDropItemSelection>().Parent = bCard.previousParent;" do?

You switch parents by changing transform.parent.

[Genhain]

apologies went for lunch...

WCDragDropItemSelection exposes the MParent variable via property in UIDragDropItem and i am setting that to previousParent if the movement is not valid. Previous parent which is a public transform inside my class BattleCard which is set whenever it gets to a new legal parent.

so at the moment i am moving the battle card from one UIGrid set as its parent...to another UIGrid, and i do some checks to see if the movement is valid...if it is not i would like to programatically move it back to it's "previousParent". which is the UIGrid it was in before the drag and drop release occurs.

I can provide a better description if necessary.

cheers

-EDIT-
right okay i see what you mean i changed from

1. bCard.transform.GetComponent<WCDragDropItemSelection>().Parent = bCard.previousParent;
2. NGUITools.MarkParentAsChanged(gameObject);
3. bCard.previousParent.GetComponent<UIGrid>().Reposition();
4.  

to

1. bCard.transform.parent = bCard.previousParent;
2. NGUITools.MarkParentAsChanged(gameObject);
3. bCard.previousParent.GetComponent<UIGrid>().Reposition();
4.  

And it moves it back to the correct position, which is fantastic...Problem now is its now at the wrong depth... its going back to a rather nested grid like so

Panel->Container->UISprite->UIScrollView->Container(UIDragView)->UIGrid

Rather convoluted i know, but it is achieves the interface and functionality i desired. so it going back to the UIGrid show below but it's behind the UISprite(as fas as i can ascertain visually). not only that but it's position.z goes to -99 and even changing that manually to 0 while the scene is running seems to not do much.

[Genhain]

-UPDATE-

finally got it working here is the code if anyone else is interested...

1. bCard.transform.parent = bCard.previousParent;
2. Vector3 pos = bCard.transform.localPosition;
3. pos.z = 0f;
4. bCard.transform.localPosition = pos;
5.  
6. UIGrid mGrid = NGUITools.FindInParents<UIGrid>(bCard.transform.parent);
7. UITable mTable = NGUITools.FindInParents<UITable>(bCard.transform.parent);
8.  
9. NGUITools.MarkParentAsChanged(bCard.gameObject);
10.  
11. if (mTable != null) mTable.repositionNow = true;
12. if (mGrid != null) mGrid.repositionNow = true;
13.  

I was calling MarkParentAsChanged() on the wrong instance. so my card was not going back to the correct panel...hence why it was on the wrong depth.

@ArenMook Cheers