Paging error in ListGrid

[fplanel]

Hi all,

I get the following error while fetching data to get second page (first one is OK !).

This is the request content I get from restDatasource :

 
_componentId=isc_OID_1
_sortBy=id
_operationType=fetch
_startRow=0
_endRow=20
_dataSource=contacts

This is part of my response, displayed correctly :

 
<response>
    <status>0</status>
    <startRow>0</startRow>
    <endRow>20</endRow>
    <totalRows>809</totalRows>
    <data>
        <Record>
            <id>1</id>
            <FirstName>Francois</FirstName>
            <LastName>Louis</LastName>
            <Email>Christophe@yahoo.com</Email>
        </Record>
        <Record>
            <id>2</id>
            <FirstName>Ludivine</FirstName>
            <LastName>Isabelle</LastName>
            <Email>Kevin@yahoo.com</Email>
        </Record>
[...]
        <Record>
            <id>21</id>
            <FirstName>Gérard</FirstName>
            <LastName>Francois</LastName>
            <Email>Ludivine@yahoo.com</Email>
        </Record>
    </data>
</response>

Then I get this message as soon as I scroll down

java.lang.ClassCastException
	at java.lang.Class.cast(Unknown Source)
	at com.google.gwt.dev.shell.JsValueGlue.get(JsValueGlue.java:125)
	at com.google.gwt.dev.shell.ie.SwtOleGlue.convertVariantsToObjects(SwtOleGlue.java:57)
	at com.google.gwt.dev.shell.ie.IDispatchImpl.callMethod(IDispatchImpl.java:119)
	at com.google.gwt.dev.shell.ie.IDispatchProxy.invoke(IDispatchProxy.java:155)
	at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke(IDispatchImpl.java:294)
	at com.google.gwt.dev.shell.ie.IDispatchImpl.method6(IDispatchImpl.java:194)
	at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java:117)
	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
	at com.google.gwt.dev.GWTShell.pumpEventLoop(GWTShell.java:720)
	at com.google.gwt.dev.GWTShell.run(GWTShell.java:593)
	at com.google.gwt.dev.GWTShell.main(GWTShell.java:357)
Uncaught JavaScript exception [java.lang.ClassCastException: null
	at java.lang.Class.cast(Unknown Source)
	at com.google.gwt.dev.shell.JsValueGlue.get(JsValueGlue.java:125)
	at com.google.gwt.dev.shell.ie.SwtOleGlue.convertVariantsToObjects(SwtOleGlue.java:57)
	at com.google.gwt.dev.shell.ie.IDispatchImpl.callMethod(IDispatchImpl.java:119)
	at com.google.gwt.dev.shell.ie.IDispatchProxy.invoke(IDispatchProxy.java:155)
	at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke(IDispatchImpl.java:294)
	at com.google.gwt.dev.shell.ie.IDispatchImpl.method6(IDispatchImpl.java:194)
	at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java:117)
	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
	at com.google.gwt.dev.GWTShell.pumpEventLoop(GWTShell.java:720)
	at com.google.gwt.dev.GWTShell.run(GWTShell.java:593)
	at com.google.gwt.dev.GWTShell.main(GWTShell.java:357)] in http://localhost:8888/com

This is the second request I get from RestDatasource :

 
_componentId=isc_OID_1
_sortBy=id
_operationType=fetch
_startRow=21
_endRow=41
_dataSource=contacts

So error occured before the second fetch request is send back to the server ! Any idea ?

[fplanel]

Paging error : more information

Running it in web mode does not hang the interface.

The problem I have is if I scroll to bottom then the ListGrid displays only the first page (20 records).

If I scroll down gently (using pg-down key) then no problem at all.

Thanks for your help

[tomhj]

This is the same error that I reported in this thread:

http://forums.smartclient.com/showthread.php?t=2994

Sanjiv said he was looking into it, but I haven't heard anything on it for a while.

[fplanel]

Thank you for this ; so this is a known issue, sure it will be managed soon. I will look for a workaround and let you know.

Regards

François

[sjivan]

I added issue 61 for this. Sorry, I completely fogot to follow up on this. I will get back to looking into it. I have a good idea of what might be causing it in hosted mode.

Thanks,
Sanjiv