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How to fire an event only if specific-time has lapsed after scrolling has been stopped


By : camachocamacho
Date : October 18 2020, 06:10 AM
may help you . I want to fire an event-handler after and only if the scrolling has been stopped for specific time (lets say 0.2sec). , you can use this:
code :
// Setup isScrolling variable
var isScrolling;

// Listen for scroll events
window.addEventListener('scroll', function ( event ) {

    // Clear our timeout throughout the scroll
    window.clearTimeout( isScrolling );

    // Set a timeout to run after scrolling ends
    isScrolling = setTimeout(function() {

        // Run the callback
        console.log( 'Scrolling has stopped.' );

    }, 200); // 200 for 0.2s 

}, false);


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How to get the event when a picker view stopped scrolling


By : RAA
Date : March 29 2020, 07:55 AM
this one helps. whenever you scroll the picker view, didSelect delegate method call at the end of scroll
code :
- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {

NSLog(@"Selected  %i. ",  row);
/// do it here your queries
}

Fire scroll event after a certain scroll offset or scrolling time


By : ligold
Date : March 29 2020, 07:55 AM
may help you . I guess you are having that trouble with laptops and their trackpads rather than with the mouse wheel. Am I correct? Or maybe, with the Apple mouse, which is like a trackpad in terms of scrolling.
Well, just to let you know, the problem is not in the $(window).scroll(function(e){ function, but in the MouseWheelHandler(). The .scroll function is only used when the option autoScrolling is set to false as you can see in the first condition.
code :
var scrolls = 0;
if(options.autoScrolling && scrolls>2){
}else{
    scrolls++;    
};
var scrolls = 0;

 function MouseWheelHandler() {
     return function (e) {
         if (options.autoScrolling && scrolls > 2) {
             // cross-browser wheel delta
             e = window.event || e;
             var delta = Math.max(-1, Math.min(1, (e.wheelDelta || -e.detail)));
             e.wheelData

             console.log("e.wheelDelta: " + e.wheelDelta);
             console.log("-e.detail: " + e.detail);

             if (!isMoving) { //if theres any #
                 var scrollable = $('.section.active').find('.scrollable');

                 //scrolling down?
                 if (delta < 0) {
                     if (scrollable.length > 0) {
                         //is the scrollbar at the end of the scroll?
                         if (isScrolled('bottom', scrollable)) {
                             $.fn.fullpage.moveSlideDown();
                         } else {
                             return true; //normal scroll
                         }
                     } else {
                         $.fn.fullpage.moveSlideDown();
                     }
                 }

                 //scrolling up?
                 else {
                     if (scrollable.length > 0) {
                         //is the scrollbar at the start of the scroll?
                         if (isScrolled('top', scrollable)) {
                             $.fn.fullpage.moveSlideUp();
                         } else {
                             return true; //normal scroll
                         }
                     } else {
                         $.fn.fullpage.moveSlideUp();
                     }
                 }
             }
             scrolls = 0;

             return false;
         } else {
             scrolls++;
         };
     }
 }

How to have a MouseMove event fire only if the mouse is hovered over an element for at least a specific amount of time?


By : Michał Sutkowski
Date : March 29 2020, 07:55 AM
wish of those help I want to display a JFrame when a user move the mouse pointer inside over a certain area of a JPanel with a little delay. I show the JFrame by attaching a MouseAdapter to the JPanel and overriding the MouseMove method. , Maybe a good solution is by using java.util.Timer.
code :
addMouseListener(new MouseAdapter() {
 private int delay = 1000;//1 second
 private Timer timer = null;
 private int startTime =0;

  @Override
  public void mouseMoved(MouseEvent e) {
    Point p= e.getLocationOnScreen();
    boolean pointInArea=false;
    //check if Point p is within the boundaries of a rectangle.          
    if(pointInArea){
        //A JFrame is queued to be shown
        if(System.currentTimeMillis()-startTime>delay){
          //A JFrame has been already shown, then show a new one
          startTime = System.currentTimeMillis();
          timer = new Timer();                    
          timer.schedule(new TimerTask(){
              @Override
              public void run() {
                //LAUNCH JFrame
              }

          }, delay);                     
        }
     }
     else (!pointInArea && timer != null){
        timer.cancel();
        timer = null;                        
     }
  }                
});

YUI3: Re-fire an event that I stopped from propagating?


By : superboy119
Date : March 29 2020, 07:55 AM
This might help you I would think that the best way to tackle this issue would be to select the tab programmatically instead of trying to "re-fire" the event somehow.
To select a tab programmatically with tabView, you need to use the selectChild(index) method.

on input element fire change event only once after specific time period


By : ZHora Grigoryan
Date : March 29 2020, 07:55 AM
I hope this helps you . You will need debounce function. Either use lodash _.debounce or write your own simple one. Then use it like this:
code :
jQuery("#width").on('input', debounce(function() {
  alert('hello')
}, 1500))
function debounce(callback, delay) {
  var timeout
  return function() {
    var args = arguments
    clearTimeout(timeout)
    timeout = setTimeout(function() {
      callback.apply(this, args)
    }.bind(this), delay)
  }
}
jQuery("#width").on('input', debounce(function() {
  alert('hello');
}, 1500));

function debounce(callback, delay) {
  var timeout
  return function() {
    var args = arguments
    clearTimeout(timeout)
    timeout = setTimeout(function() {
      callback.apply(this, args)
    }.bind(this), delay)
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<input type="text" id="width" />
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