In a component's editable Datagrid's itemEditEnd handler, I update a
data model instance, which dispatches events that invoke a ChangeWatcher
handler back in that same component. That handler assigns a new
XMLListCollection to the local var to which the editable dataGrid is
bound. The handler also sets the selectedIndex of the DG to the just
edited row.
This all works fine if I end the editing session using Tab or Enter or
Escape, but if I click in the next row, something confuses the rowIndex
of the click, and the next row's cell is put in edit mode instead of the
one clicked.
So far I have been unable to repro this in a test app (quit because of
time issues), but it occurs both places that I use this methodology.
I also have found that there is some kind of event "tangle". When my
change handler is invoked and re-assigns the DG dataProvider, we are
still "within" the itemEditEnd handler, but assigning the DP causes us
to hit the itemEditend handler AGAIN, recursively.
I am about ready to just set a flag and conditionally skip the problem
code, but any other ideas will be appreciated. I'll post some snippets
below.
Tracy
Tracing:
onEditEnd() //value updated, click in 2nd row(index
1),itemEditEnd handler called
..onEditEnd rowIndex=0 //
changeProjItemData() //updates the data model
onXmlProjItemsChange: //ChangeWatcher handler
..<-- here we assign the dg dataProvider -->
onEditEnd() //UNEXPECTED call to itemEditEnd handler
..onEditEnd rowIndex=0
selectItemByIndex( 0)
onSelectItem //called by DG change event handler, 2nd
row(index 1) clicked
..set _iSelectedIndex to row clicked=2 //WRONG index, clicked index "1"
..<-- here , the 3rd row is set to editable, not the 2nd as clicked
Snippets:
/**This gets fired when the itemEditor is about to be destroyed. */
private function onEditEnd(event:DataGridEvent):void
{
trace(".ProjItem.onEditEnd()")
var sPropertyName:String = event.dataField; //get the
dataField
var sValue:String =
TextInput(event.currentTarget.itemEditorInstance).text; //and value
trace(".....onEditEnd rowIndex=" + event.rowIndex )
if (_xmlProjItem[sPropertyName] != sValue) { //if value
changed
changeProjItemData(sPropertyName,sValue)
event.preventDefault();
}
}//onEditEnd
/** Sets required save flags, updates the local value, and updates the
data model */
private function changeProjItemData(sPropertyName:String,
sValue:String):void
{
trace(".ProjItem.changeProjItemData()")
if (sPropertyName && sValue) {
[EMAIL PROTECTED] = "true"; //flas for
save
_xmlProjItem[sPropertyName] = sValue;
[EMAIL PROTECTED] = "true";
[EMAIL PROTECTED] = "true"; //required
for SAVE!
[EMAIL PROTECTED] = "true"; // "
[EMAIL PROTECTED] = "true";
_dsApp.xmlProjItems = _xmlProjItems; //Update the
data model. Invokes change handler
}
}//changeProjItemData
/** changeWatcher handler on DSApp.xmlProjItems */
private function onXmlProjItemsChange( event:PropertyChangeEvent
):void
{
trace("...Project.onXmlProjItemsChange:")
var xml:XML = event.newValue as XML;
if (xml) {
_xmlProjItems = xml.copy();
_xlcProjItems = new
XMLListCollection(_xmlProjItems.children().(attribute("rowaction")!="del
ete")); //dgProjItem dataProvider
selectItemByIndex(_iSelectedIndex);
}
else {
_xmlProjItems = <DocumentElement />;
_xmlProjItem = null;
_xlcProjItems = new XMLListCollection(_xmlProjItems.ProjItem);
}
}//onXmlProjItemsChange
/** Run by change event of dgProjItem */
private function onSelectItem(event:Event):void
{
trace(".projItem.onSelectItem -- current _iSelectedIndex = " +
_iSelectedIndex)
_xmlProjItem = XML(event.target.selectedItem);
//set local var
_iSelectedIndex = event.target.selectedIndex;
//store index
trace("....set _iSelectedIndex to row clicked=" + _iSelectedIndex);
bPrevAvail = (_iSelectedIndex > 0);
//next/prev button state
bNextAvail = (_iSelectedIndex < _xmlProjItems.children().length() -
1);
_dsApp.xmlProjItem = _xmlProjItem;
//set data model
}//onSelectItem
/** Selects previously stored row */
private function selectItemByIndex(iIndex:int):void
{
trace(".projItem.selectItemByIndex( " + iIndex + ")")
_xmlProjItem = _xmlProjItems.ProjItem[iIndex]; //select the
first Item
dgProjItems.selectedIndex = iIndex;
_iSelectedIndex = iIndex;
bPrevAvail = (_iSelectedIndex > 0);
bNextAvail = (_iSelectedIndex < _xmlProjItems.children().length() -
1);
_dsApp.xmlProjItem = _xmlProjItem;
}//selectItemByIndex
