I'll look into that, but our app has a lot riding on item-edit-end, so side-stepping item-edit-end is going to be pretty difficult for me.
I was hoping to find some workaround to make sure that item-edit-begin/end is always started. On Mon, Jul 14, 2008 at 6:20 PM, Alex Harui <[EMAIL PROTECTED]> wrote: > There are some checkbox examples on my blog (blogs.adobe.com/aharui). > > > > Look for other examples. Most folks update the dataprovider when the > checkbox sends its change event and don't wait for ITEM_EDIT_END > > > ------------------------------ > > *From:* [email protected] [mailto:[EMAIL PROTECTED] *On > Behalf Of *Glenn Jones > *Sent:* Monday, July 14, 2008 1:50 PM > *To:* [email protected] > *Subject:* [flexcoders] problem using checkbox in DataGrid > > > > I'm having a problem using a checkbox as an item editor within a datagrid. > It might be a bug or maybe I'm doing something wrong. > Either way, I need to fine some resolution/workaround. > > In my DataGridColumn definition, I'm setting editable=true and > rendererIsEditor=true for the column with the checkbox. My application > listens for ITEM_EDIT_BEGINNING, ITEM_EDIT_BEGIN, ITEM_EDIT_END, > ITEM_FOCUS_IN and onSelectChange events on the grid. > > The majority of times, the checkbox works fine - it displays the proper > status for the underlying data element and it updates the element > correctly as well. The problem occurs, intermittenly, in the following > scenario > > 1. Click on a checkbox in row A > - the checkbox toggles status on screen and row A is selected > > 2. Click on a checkbox in row B > - the checkbox in row B toggles status on screen, row B is selected, but > the checkbox in row A toggles back to it's previous state. > > In other words, the checkbox change made in step 1 is lost. This happens on > irregular basis, but is repeatable at least once > every 5-10 trials. > > I've found that when the problem occurs, the grid never sends an > item_edit_beggining/item_edit_begin event in step 1. Consistent > with no item-edit-beginning event, there is no item-edit-end event when > focus changes to row B in step 2. > Without the item-edit-begining/item-edit-end events, the state of the > checkbox toggle in step #1 is not reflected back into the underlying data. > The changing row selection in step 2 has the side-effect of updating the > display list, at which point, the item renderer in row A redraws itself > with the underlying data. Since the underlying data was never changed, the > checkbox in row A flips back to it's original state. > > In the checkbox's click handler, I've confirmed that if the parent grid's > editedItemPosition attribute is null when the checkbox is clicked, > then the change in checkbox status will be lost if the grid is redrawn; > i.e. editedItemPosition == null is consistent with never getting the > item-edit-beginning event. > > If all of this is clear as mud, thanks for taking the time to read this far > :-) > > If anyone has some suggestions (or patch ids?) for why the grid may not > recognize that an item-edit cycle has started when a checkbox > is selected, please let me know. > > When the checkbox edit works correctly, the sequence of events I see is > > 1. Click on a checkbox in row A > itemEditBegining for row A > itemEditBegin for row A > itemFocusIn for checkbox in row A > checkbox click event for row A > 2. Click on a checkbox in row B. > itemEditBegin for row A <=== correct checkbox state written back > to underlying data > itemEditBegining for row B > itemEditBegin for row B > itemFocusIn for checkbox in row B > checkbox click event for row B > > Thanks, > - Glenn > > >
