Combobox load data while scrolling

Combobox load data while scrolling

Posted by: vorobjovkirill on 14 September 2017, 12:04 pm EST

• 

  vorobjovkirill

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  Posted 14 September 2017, 12:04 pm EST

  Good day,

  Is there a way to load a small portion of Data in Combobox at the start and then while the user scrolls load the rest? Something like

  lazy loading

  or something like with

  FlexGrid

  infinite scroll. But the problem is that Combobox doesn’t have Events like

  scrollPositionChanged

  .

  Thank you for your time.

• 

  manish-gupta1

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  Posted 14 September 2017, 12:05 pm EST

  Hello,
  
  We are sorry, currently, there is no way to accomplish this.
  
  We have created an enhancement request to add scrollPositionChanged event for Combobox with tracking id 265310. If it is found feasible, it will be included in the future releases.

  Thanks,
  
  Manish Kumar Gupta

• 

  manish.gupta

  

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  Posted 20 January 2018, 6:40 am EST

  Hi,
  
  We are sorry for the late reply.

  We may use infinite scroll using standard HTML scroll event.Please refer to the following code snippet:
  
  using the dropDown’s standard HTML ‘scroll’ event.

    var theCombo = new wijmo.input.ComboBox('#theCombo', {
      selectedIndexChanged: function(s, e) {
       setText('theComboStringCurrent', s.text);
      },
      itemsSource: countries
   });
  
   
  
    // listen to scroll events from the combo's dropDown:
    theCombo.addEventListener(theCombo.dropDown, 'scroll', function(e) {
     console.log('the scroll position is ', e.target.scrollTop)
    })
  

  ~Manish