Flash/Flex itemEditor Rendering Problem!

Question

Hi,
I've created a simple checkbox itemEditer within a DataGrid
control. It works swimmingly... you check the box and the data does
what it's supposed to do (in this case just grab the ID's of the
item's that are checked).
However, the problem begins when a user decides to scroll up
and down the DataGrid to have a peak at those item's not displayed.
You can see an example here (click the 'Renew Contracts' button to
see the Contract ID's of what you have checked) -
click me!
As you can see, when a user scroll's and flash renders the
newly displayed items, it randomly checks and un-checks the
checkboxes on the right but if you click the 'Renew Contracts'
button again, you'll see that it hasn't actually affected what you
litterally checked (which suggests it is infact a rendering issue).
Any help on making flash behave itself and display check's in
checkboxes that have actually been checked by the user would be
much appreciated.

Answer 1

try this code:
- deleted the InlineCheckbox
- changed parts in the actionscript
Does this fit you needs?
please note the that the array [ i ] (
ContractsRequest.Contract [ i ] )are removed by the editor in the
forum
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
xmlns:InlineCheckbox="*">
<mx:Script>
<![CDATA[
import mx.controls.CheckBox;
[Bindable]
public var SelectedContracts:String;
public function RenewContractsClick():void
SelectedContracts = "";
if(ContractsRequest.Count > 1)
for(var i:int = 0; i < ContractsRequest.Contract.length;
i++)
if(ContractsRequest.Contract
.Selected == true)
SelectedContracts += ContractsRequest.Contract.ContractID
+ ",";
else
if(ContractsRequest.Contract
.Selected == true)
SelectedContracts = ContractsRequest.Contract.ContractID
+ ",";
]]>
</mx:Script>
<mx:Model id="ContractsRequest">
<Contracts>
<Contract>
<ContractID>5657</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/04/2002</StartDate>
<EndDate>31/03/2003</EndDate>
<Product>04253 HELPDESK SUPPORT FACTS 1
YEAR</Product>
<SON>S026866</SON>
<LineNumber>10</LineNumber>
<SONLN>S026866/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>1737</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/08/2000</StartDate>
<EndDate>31/07/2001</EndDate>
<Product>04253 HELPDESK SUPPORT FACTS 1
YEAR</Product>
<SON>S012877</SON>
<LineNumber>40</LineNumber>
<SONLN>S012877/40</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>10242</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/03/2004</StartDate>
<EndDate>28/02/2005</EndDate>
<Product>06979 SM TRISCAN 1 YEAR</Product>
<SON>S041431</SON>
<LineNumber>10</LineNumber>
<SONLN>S041431/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>18500</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>27/05/2007</StartDate>
<EndDate>26/08/2007</EndDate>
<Product>SC001 VBI QTR SUPPORT CONTRACT
</Product>
<SON>S061685</SON>
<LineNumber>10</LineNumber>
<SONLN>S061685/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>12996</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/03/2005</StartDate>
<EndDate>28/02/2006</EndDate>
<Product>06979 SM TRISCAN 1 YEAR</Product>
<SON>S049498</SON>
<LineNumber>10</LineNumber>
<SONLN>S049498/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>376</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/03/2000</StartDate>
<EndDate>28/02/2001</EndDate>
<Product>06979 SM TRISCAN 1 YEAR</Product>
<SON>BN7511</SON>
<LineNumber>10</LineNumber>
<SONLN>BN7511/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>14669</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>06/11/2005</StartDate>
<EndDate>31/01/2006</EndDate>
<Product>08245 VBI SUPPORT 3 MONTHS</Product>
<SON>S053098</SON>
<LineNumber>10</LineNumber>
<SONLN>S053098/10</SONLN>
<SiteCount>523</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>12997</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/03/2005</StartDate>
<EndDate>28/02/2006</EndDate>
<Product>06979 SM TRISCAN 1 YEAR</Product>
<SON>S049499</SON>
<LineNumber>10</LineNumber>
<SONLN>S049499/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>10243</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/03/2004</StartDate>
<EndDate>28/02/2005</EndDate>
<Product>06979 SM TRISCAN 1 YEAR</Product>
<SON>S041432</SON>
<LineNumber>10</LineNumber>
<SONLN>S041432/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>10674</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/06/2004</StartDate>
<EndDate>31/08/2004</EndDate>
<Product>08210 VBI PERIODIC CHARGE FOR S/W
SUP</Product>
<SON>S042626</SON>
<LineNumber>20</LineNumber>
<SONLN>S042626/20</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>10906</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/06/2004</StartDate>
<EndDate>31/08/2004</EndDate>
<Product>08245 VBI SUPPORT 3 MONTHS</Product>
<SON>S043294</SON>
<LineNumber>10</LineNumber>
<SONLN>S043294/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>17070</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>29/08/2006</StartDate>
<EndDate>28/11/2006</EndDate>
<Product>SC001 VBI QTR SUPPORT CONTRACT
</Product>
<SON>BN9230</SON>
<LineNumber>10</LineNumber>
<SONLN>BN9230/10</SONLN>
<SiteCount>626</SiteCount>
<Selected>true</Selected>
</Contract>
<Contract>
<ContractID>3832</ContractID>
<OrganisationID>10332</OrganisationID>
<OrganisationName>VBI GROUP
PLC</OrganisationName>
<StartDate>01/09/2001</StartDate>
<EndDate>31/08/2002</EndDate>
<Product>06979 SM TRISCAN 1 YEAR</Product>
<SON>S020524</SON>
<LineNumber>10</LineNumber>
<SONLN>S020524/10</SONLN>
<SiteCount>1</SiteCount>
<Selected>true</Selected>
</Contract>
<Count>83</Count>
</Contracts>
</mx:Model>
<mx:DataGrid editable="true" right="10" left="10" top="40"
bottom="40" dataProvider="{ContractsRequest.Contract}">
<mx:columns>
<mx:DataGridColumn editable="false" headerText="Contract"
dataField="ContractID" width="70"/>
<mx:DataGridColumn editable="false"
headerText="Organisation" dataField="OrganisationName"
width="250"/>
<mx:DataGridColumn editable="false" headerText="Start
Date" dataField="StartDate" width="100"/>
<mx:DataGridColumn editable="false" headerText="End Date"
dataField="EndDate" width="100"/>
<mx:DataGridColumn editable="false" headerText="Product"
dataField="Product"/>
<mx:DataGridColumn editable="false" headerText="SON/Line
No." dataField="SONLN" width="120"/>
<mx:DataGridColumn editable="false" headerText="No. Sites"
dataField="SiteCount" width="70"/>
<mx:DataGridColumn editable="true" headerText=""
dataField="Selected" width="70" itemRenderer="mx.controls.CheckBox"
rendererIsEditor="true" editorDataField="selected"/>
</mx:columns>
</mx:DataGrid>
<mx:Button label="Renew Contract(s)..." right="10"
bottom="10" click="RenewContractsClick()"/>
<mx:Text x="10" y="12" text="{SelectedContracts}"/>
</mx:Application>