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

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.3
• Fix Version/s: 1.3.4, 1.4-M2
• Component/s: wicket-extensions
• Assignee: Unassigned
• Reporter: Andy Chu
• Created: 07/May/08 15:03
• Updated: 16/Sep/08 20:32
• Resolved: 09/May/08 23:46

Description

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.