****[Suspected Bug on UITexture Re-parent]****

[fgame]

Steps
1. Place a UITexture and parent it to Panel A
2. Then parent it to a Panel B and BroadcastMessage "CheckParent"
3. Then parent it back to Panel A and BroadcastMessage "CheckParent"

Panel B will still has the material reference and it being rendered. Thus the UITexture is appeared 2 different positions on screen. The only way to fix it is to destroy UIPanel on B, and create a new one on it, then it will be refleshed. But it will result a blink of UI.

Please investigate

[fgame]

To let anyone reading this thread understand quickly about the issue, I created a tutorial for it. You can do it in 5 mins.

1. Find and copy "example 11 Drag Drop" in NGUI folder
2. Open the copied scene create a UITexture parent it to "Item 3".
3. Create a collier behind the box and make it able to drag the UIPanel holds the items.
4. Drag "Item 3" to a blank space and drop. It will back to original
5. Drag the UIPanel this item, you will see that UITexture will render 2 times.

This is because UIPanel on DragDropRoot still keep the material of UITexture.

Also attached the screenshot with descriptions.

Please FIX this

[ArenMook]

I will look into this when I get home.

[fgame]

I will look into this when I get home.

Any update?

[ArenMook]

I followed your instructions and I just can't reproduce this with NGUI 2.2.3 on Unity 3.5.6.

The easiest case is simply adding a UITexture to one of the items (and bringing its Z forward to -1 so it's visible), then trying to drag it. Works fine. Even adding the draggable panel stuff had no effect (not sure why you had to do this to begin with?)

[fgame]

I am also using 2.2.3 on Unity 3.5.6.
I guess maybe some of your steps are not correct. Have you added the UIDragPanelContents on a collider behind (Not on the item itself)?

I have exported the example to a package. To reproduce:
1. Create a new project, important the package
2. Drag the item to an empty space
3. Drag the collider behind to move the panel holding the items. Then you will see.

[ArenMook]

UIDragPanelContents went on the background object, yes.

"Drag the collider behind to move the panel holding the items" <-- I  have no idea what you mean by that.

[fgame]

UIDragPanelContents went on the background object, yes.

"Drag the collider behind to move the panel holding the items" <-- I  have no idea what you mean by that.

It means to drag the background object (which has a collider and UIDragPanelContents). Have you try the package I exported for you？

[ArenMook]

http://www.tasharen.com/temp/pikachu/

[ArenMook]

I think I figured out what issue you were having. I had to move the DragDropRoot object instead.

Open up UIWidget class, around line 250:

1. // This widget is no longer parented to the same panel. Remove it and re-add it to a new one.
2. if (!valid)
3. {
4.         if (!keepMaterial) material = null;
5.         mPanel = null;
6.         CreatePanel();
7. }

Change it to:

1. // This widget is no longer parented to the same panel. Remove it and re-add it to a new one.
2. if (!valid)
3. {
4.         if (!keepMaterial || Application.isPlaying) material = null;
5.         mPanel = null;
6.         CreatePanel();
7. }

[fgame]

It's solved, thank you!