OnClientNodeMouseEnter

The following article demonstrates how to use and subscribe to the OnClientNodeMouseEnter client-side event of the RadNavigation control.

The client-side OnClientNodeMouseEnter event of the RadNavigation is raised when the mouse enters a Node. To handle this event, simply write a JavaScript function that can be called when the event occurs. Then assign the name of this function as the value of the OnClientNodeMouseEnter property.

The client-side OnClientNodeMouseEnter event handler receives two arguments:

1. sender — the RadNavigation object that fired the event.

2. Event arguments — an event arguments object that exposes the following methods:

• get_node() returns a reference NavigationNode that the mouse just entered.

• get_domEvent() returns a reference to the DOM event object for the mouse movement.

Example 1: Handle the RadNavigation's client-side OnClientNodeMouseEnter event.

<script type="text/javascript">
    var timeOut;
    function OnClientNodeMouseEnter(sender, eventArgs) {
        var node = args.get_node(),
                  expandedSubling = node.get_parent().get_expandedNode();

        if (node.get_hidden()) {
            return;
        }

        clearTimeout(timeOut);

        if (node.get_expandedNode()) {
            node.get_expandedNode().collapse();
            return;
        }

        if (expandedSubling && expandedSubling !== node) {
            expandedSubling.collapse(true);
        }

        if (!node.get_expanded()) {

            node.expand();
        }

        isMouseOverNode = true;
    }
</script>

<telerik:RadNavigation runat="server" ID="RadNavigation1" OnClientNodeMouseEnter="OnClientNodeMouseEnter">
    <Nodes>
        <telerik:NavigationNode Text="Node1"></telerik:NavigationNode>
        <telerik:NavigationNode Text="Node2"></telerik:NavigationNode>
        <telerik:NavigationNode Text="Node3"></telerik:NavigationNode>
    </Nodes>
</telerik:RadNavigation>

See Also

• Demo: Navigation - Expand On Hover

• Expand and collapse delay on hover in RadNavigation Code Library project