DropDownList event timing - event after selection is completely done

[David]

Hi, 

I'm trying to use a DropDownList event to trigger a complex page update (updating a bunch of divs, DataSource reads, etc), and cannot find an event that happens at the right *time* to get the behavior I want.  I want to call a javascript function AFTER the user has selected an item from the dropdownlist, AND the DropDownList has refreshed with the user's selection.  All the events listed here (http://docs.telerik.com/kendo-ui/api/javascript/ui/dropdownlist#events) fire BEFORE the widget completes updating.  The reason I want to do this is to show a "Loading...." message, while the complex page update takes place (it is very complex and takes a couple of seconds), then hide "Loading" and show the new stuff.

Are there any other events I could use to trigger my activity?  Executing my update function via an event handler for any of the documented events resulting in the following sequence:

-drop down list expands

-user picks an item

-the page sitting for a couple of seconds while my update happens, with the list still expanded

-drop down list retracts and the page finishes nicely ....

 

I need an event that fires AFTER the DropDownList finishes updating.

 

bootstrap has such an event, as shown here: 

http://www.w3schools.com/bootstrap/tryit.asp?filename=trybs_ref_js_dropdown_events&stacked=h

the hidden.bs.dropdown event is what I want.

Is there a generic Kendo equivalent, or workaround?  The control doesn't have to be a drop down list, its just that was simplest - there are very few items in it.  I would prefer to stick with a simple Kendo control, but if there isn't an appropriate event I'll use something else or a workaround -

Thanks!

[Plamen]

Hello,

Thank you for getting in touch with us.

One possible solution for such scenario is to use the close event only when change is made immediately before it. You can refer to this dojo page where a similar scenario is implemented by using a flag.

Regards,
Plamen
Telerik

[David]

Thanks for the response, but your sample uses the same event already documented, and adapting your example exactly provides behavior that is no different from other attempts I've made.

The problem is that the event fires BEFORE the dropdownlist updates, retracts the list, and shows the new value.  It fires my long-lasting event, so the user is stuck looking at the opened DropDownList for 2-3 seconds.  I'll do something else.

 

Thanks!

[Plamen]

Hello,

Yes indeed it seems that there is such event inbuild in the control. One possible solution is to use the setTimeout and trigger your update after some time has passed.

Regards,
Plamen
Telerik

[David]

Thanks - this helped us sort it out.