[jira] Created: (WICKET-1595) AutoCompleteTextField: Scrolling down the Choice Menu Only When the Bottom of the Menu Is Reached

[Andy Chu (JIRA)]

AutoCompleteTextField: Scrolling down the Choice Menu Only When the Bottom of 
the Menu Is Reached
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                 Key: WICKET-1595
                 URL: https://issues.apache.org/jira/browse/WICKET-1595
             Project: Wicket
          Issue Type: Improvement
          Components: wicket-extensions
    Affects Versions: 1.3.3
            Reporter: Andy Chu


Currently, the AutoCompleteTextField will scroll the selected item to the top 
of the choice menu by the following code in the render method:

if(selected==i) {
                classNames.push('selected');
                node.scrollIntoView(true);
}

However, I think it should be more user-friendly if the choice menu is only 
scrolled down for *one-item*  when the bottom of the current menu is reached. 
Please refer to:  
http://www.dhtmlgoodies.com/scripts/ajax-dynamic-list/ajax-dynamic-list.html.

This can be implemented by the following modification:

 if(selected==i) {
                classNames.push('selected');
                if (node.offsetTop >= element.offsetHeight) {
                        element.scrollTop = node.offsetTop - 
element.offsetHeight + node.offsetHeight + 2 ;
                }
                if (node.offsetTop < element.offsetHeight) {
                        element.scrollTop = 0;
                }
            }
}

Hope this feature can be added.

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