v3.0.1 checkAll fires multiple checkChange Events

[arajputMember]

I just upgraded from v2.8.3 to v3.0.1 and started noticing a very strange behavior in my application.

I have a drop down list with entries like ‘ALL, Item1, Item2, Item3’ and have enabled check boxe selection using property
‘checkboxes: true’

User can check ALL to enable selection for all the entries available.

Internally I check all the boxes using the API and then initiate some business logic, excerpt shown below

var that = this;
$(‘#tms’).on(‘checkChange’, function (event) {
var item = event.args.item;

if(item) {
// Handle ‘ALL’ case
if(item.value===’ALL’)
{
// Handle checked case
if(item.checked===true)
{
// Check all the entries
$(‘#tms’).jqxDropDownList(‘checkAll’); // Problematic call in v3.0.1

// Business logic processing, initiates ajax call to server
that.onTradingMemberChange(‘ALL’);
return;
}
}
}
});

in v2.8.3 this was working perfectly fine but in the latest version 3.0.1 as soon as I call .jqxDropDownList(‘checkAll’), multiple checkChange events are getting fired, one for each entry in the drop down.

Is this a bug introduced in 3.0.1? Can someone please take a look at the change in behavior.

Thank you
Ashish

[Peter StoevKeymaster]

Hi Ashish,

That is actually intentional. It was a bug that the event was not raised when the “checkAll” method was called.

Best Regards,
Peter Stoev

jQWidgets Team
http://www.jqwidgets.com/

[arajputMember]

Peter,
How do you suggest we handle multiple calls to the ‘checkChange’ event handler? I have 234 items in the list and the checkAll is making my handler to be called 234 times!
Is there a ‘slient’ configuration? or any other alternative?
Since this is an API call to check/uncheck of all the boxes, i don’t see why it should trigger checkChange for every item in the list.
That’s my opinion, I have a feeling you disagree

Ashish

[Peter StoevKeymaster]

Hi Ashish,

The arguments of the “checkChange” event depend on each item and it is raised for each item. You can add a boolean flag and apply or not apply your logic in the event “checkChange” event handler. I suppose that you know when you call the “checkAll” method in your code.

Best Regards,
Peter Stoev

jQWidgets Team
http://www.jqwidgets.com

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