Dear all,
In line 4780 of DataGrid.as source code from Flex 3.2 SDK
the author of the code subscribes to Event.DEACTIVATE event inside
private method "itemEditorItemEditBeginHandler".
-----------------------------------------
line 4780: systemManager.addEventListener(Event.DEACTIVATE,
deactivateHandler, false, 0, true);
-----------------------------------------
Why DataGrid "wants" to listen to this specific event
Event.DEACTIVATE that is dispatched from the core of the Flash Player?
I am wondering , because when I use custom renderer that is based
on Combobox control as itemEditor of DataGrid's column,
then I often lose the focus from itemEditor to the DataGrid itself
when I am tabbing between itemEditor instances by pressing keyboard
TAB key (I press TAB key and do not release it for a little while).
During my tabbing sequence between itemEditors in Datagrid suddenly
Event.DEACTIVATE is triggered by Flash player and then DataGrid's
event listener 'deactivateHandler' function code is executed which
moves the focus away from itemEditor to datagrid == in UI it results
as flickering focus from itemEditor to Datagrid and back.
The code 'deactivateHandler' function follows:
-----------------------------------------
line 4568: private function deactivateHandler(event:Event):void
line 4569: {
.... :
// if stage losing activation, set focus to DG so when
we get it back
// we popup an editor again
if (itemEditorInstance)
{
endEdit(DataGridEventReason.OTHER);
losingFocus = true;
setFocus();
}
}
-----------------------------------------
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Best regards,
JabbyPanda
