UI Toolkit

[soma-soma]

Hi,

I m coding using ListPanel.Move(), but when I called ListPanel.Move(-10262.88) several times,
it failed with following exception. (where ListPanel height is 1026288 pix)

----------------------------
Warning: Degraded allocation. Consider increasing nursery-size if the warning persists.
Warning: Degraded allocation. Consider increasing nursery-size if the warning persists. Unhandled Exception: OutOfMemoryException.
----------------------------

Speared following code seems to work.

for(int i = 0;i < 10;i++){
MyClass.listPanel.Move( -1026288f/100f);
}

Are there any limitations about that?

[jamesnorman91]

Hi soma-soma,

Thank you for this report. I will have to replicate this problem locally to confirm the potential bug. I presume that your ListPanel is displaying correctly / consistently without the ListPanel.Move( x ) ?

I will update you once I have replicated it.

Cheers
James

[soma-soma]

Hi James,

> I presume that your ListPanel is displaying correctly / consistently without the ListPanel.Move( x ) ?

Yes, my ListPanel seems to be displaying correctly, without ListPanel.Move( -10262.88 ).

Now, I'm trying to display following ListPanelItem with 3000 in a ListPanel.
+------------------------------------------------------------------------------------+
|(LiveSphere) (Label) (LiveSphere) (LiveSphere) (Label) (Button) |
+------------------------------------------------------------------------------------+
|(LiveSphere) (Label) (LiveSphere) (LiveSphere) (Label) (Button) |
+------------------------------------------------------------------------------------+
                                            :
                             < 3000 items >

At this ListPanelItem --- with 3000 items ---- , ListPanel.Move(-10262.88)  outputs "Unhandled Exception: OutOfMemoryException."

On the other hand, at following ListPanelItem , which is LiveSphere eliminated ,
ListPanel.Move( -10262.88 ) does not outputs Unhandled Exception: OutOfMemoryException.

+------------------------------------------------------------------------------------+
| (Label) (Label) (Button) |
+------------------------------------------------------------------------------------+
| (Label) (Label) (Button) |
+------------------------------------------------------------------------------------+

                                            :
                             < 3000 items >

Is that too many objects in a ListItem? Please confirm it.

[jamesnorman91]

Hi soma-soma,

Thank you for following up. It looks like the memory size of your row is quite large (3 LiveSphere's) which will contribute towards a premature ending when the Move() method is called. Each time your making the Move() call, your ListItemCreator delegate is called which will instantiate a new ListPanelItem into memory, and with a large number of these being called into memory in rapid succession, this will cause your memory issues.

Running this here, we've managed to get 5000+ ListPanelItems showing, and making a call to ListPanel.Move( -10262.88 ) works fine, on a simple ListPanelItem.

I hope this helps.

Best regards,
James

[soma-soma · Accepted solution]

Thank you for your comment.Somehow, I understand.

OK, I will not call ListPanel.Move( ) at large number.