CODEWITHSUNDEEP
javafxjavafx-2scrollbarscrollpane
Dhiren Hamal
Dhiren Hamal

Reputation: 1002

How to Fire event on scrollBar visible in javaFX?

At the time of scroll bar visible or occur I want to fire an event. Till now what I've done is 

private ScrollBar getVerticalScrollbar() 
    {
        ScrollBar result = null;
        for (Node n : scrollPaneID.lookupAll(".scroll-bar")) 
        {
            if (n instanceof ScrollBar) 
            {
                ScrollBar bar = (ScrollBar) n;
                if (bar.getOrientation().equals(Orientation.VERTICAL)) 
                {
                    result = bar;
                }
            }
        }       
        return result;
    }  
ScrollBar bar = getVerticalScrollbar();

through this I can check if the scroll bar is appear or not

if(bar.isVisible()) 
 {

 }

but it works only after the scrollbar is visible. My requirement is fire event when scrollbar is appear

Upvotes: 1

Views: 1108

Answers (1)

Sarfaraz Khan
Sarfaraz Khan

Reputation: 2186

You can try adding a ChangeListener to visible property.Something like below but this will fire every time its visibility changes so put your logic inside the changed method very carefully according to your requirement

result.visibleProperty().addListener(new ChangeListener<Boolean>() {
        @Override
        public void changed(final ObservableValue<? extends Boolean> observableValue, final Boolean aBoolean, final Boolean aBoolean2) {
            System.out.println("Scrol Pane visible");

        }
    });

Upvotes: 1

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