UIWrapContent with one end closed

[Agent_007]

How hard would it be to modify UIWrapContent to make it closed from other end? (with closed I mean you cannot scroll around that end)

It would be very useful for top list since you can't go to negative positions (player #1 would be the first item)

Currently I am thinking about limiting the UIpanel values from WrapContent(), but I am not sure if it is the correct way to do this.

[ArenMook]

You can certainly modify the wrap content script but I'd recommend you create a copy of it so that your changes don't get wiped when you update. The function you will want to change is WrapContent() -- It does the repositioning inside.

[nkls]

Could someone please give me a hint on what to change inside the WrapContent() to get this behavior? 

[Agent_007]

1. float startY;
2.  

to line 39

1. startY = mPanel.transform.localPosition.y;

to line 112

1. if (mPanel.transform.localPosition.y < startY)
2. {
3.         Vector3 overRide = mPanel.transform.localPosition;
4.         overRide.y = startY;
5.         mPanel.transform.localPosition = overRide;
6.         mPanel.clipOffset = new Vector2(mPanel.clipOffset.x, -startY);
7. }

to line 138

that is for vertical scroll list.

[nkls]

sweet, thank you!

[Agent_007]

Better subclassed version with real indexing. It isn't perfect, but it should work. Code still needs another ending for the bottom limit, since there is a limited amount of scores.

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class TopPlayersWrap : UIWrapContent {
5.  
6.         int itemCount;
7.         int itemsTotalSize;
8.         int startPositionForFirstItem;
9.         float startY;
10.         bool areUpdateItemPreCalcsDone = false;
11.         bool areOnMovePreCalcsDone = false;
12.  
13.         private void DoUpdateItemPreCalcs()
14.         {
15.                 this.itemCount = transform.childCount;
16.                 this.itemsTotalSize = this.itemCount * Mathf.RoundToInt(itemSize);
17.         }
18.  
19.         private void DoOnMovePreCalcs(UIPanel panel)
20.         {
21.                 this.startY = panel.transform.localPosition.y;
22.         }
23.  
24.         public void InitTopPlayers()
25.         {
26.                 // Set positions
27.                 this.RepositionChildrenToStartFromTop(NGUITools.FindInParents<UIPanel>(gameObject));
28.                 // Modify items
29.                 for (int i = 0; i < transform.childCount; i++)
30.                 {
31.                         this.UpdateTopPlayerItem(transform.GetChild(i), i);
32.                 }
33.         }
34.  
35.         private void RepositionChildrenToStartFromTop(UIPanel panel)
36.         {
37.                 this.startPositionForFirstItem = (Mathf.RoundToInt(panel.GetViewSize().y) / 2) - Mathf.RoundToInt(itemSize)/2 - 10;
38.                 for (int i = 0; i < transform.childCount; i++)
39.                 {
40.                         transform.GetChild(i).localPosition = new Vector3(0, startPositionForFirstItem - i * Mathf.RoundToInt(itemSize), 0);
41.                 }
42.         }
43.  
44.         protected override void UpdateItem (Transform item, int index)
45.         {
46.                 if (!this.areUpdateItemPreCalcsDone)
47.                 {
48.                         this.areUpdateItemPreCalcsDone = true;
49.                         this.DoUpdateItemPreCalcs();
50.                 }
51.  
52.                 int realIndex = (Mathf.RoundToInt(item.localPosition.y-startPositionForFirstItem) / -itemsTotalSize * itemCount) + index;
53.                 this.UpdateTopPlayerItem(item, realIndex);
54.         }
55.  
56.         private void UpdateTopPlayerItem(Transform item, int realIndex)
57.         {
58.                 // INSERT YOUR ITEM UPDATE CODE HERE!!!
59.                 //item.Find("PlayerName").GetComponent<UILabel>().text = "Player " + realIndex;
60.         }
61.  
62.         protected override void OnMove (UIPanel panel)
63.         {
64.                 if (!this.areOnMovePreCalcsDone)
65.                 {
66.                         this.areOnMovePreCalcsDone = true;
67.                         this.DoOnMovePreCalcs(panel);
68.                 }
69.  
70.                 if (panel.transform.localPosition.y < startY)
71.                 {
72.                         Vector3 overRide = panel.transform.localPosition;
73.                         overRide.y = startY;
74.                         panel.transform.localPosition = overRide;
75.                         panel.clipOffset = new Vector2(panel.clipOffset.x, -startY);
76.                 }
77.  
78.                 base.OnMove(panel);
79.         }
80. }

And init it with

1. something.transform.Find("UIGrid").GetComponent<TopPlayersWrap>().InitTopPlayers();